Bolt and vehicle

Abstract

The utility model discloses a bolt and a vehicle, the bolt is used for fastening a first connecting piece and a second connecting piece, the first connecting piece is provided with a first connecting hole, the second connecting piece is provided with a second connecting hole, the bolt comprises a fastening part, a fastening part and a fastening part, the fastening part is arranged in the first connecting hole and the second connecting hole in a penetrating manner; the end, in the length direction, of the fastening part is connected with the head, the head is arranged on the side, away from the second connecting piece, of the first connecting piece and is suitable for abutting against the first connecting piece, and the side, facing the first connecting piece, of the head is provided with a paint scraping protrusion used for scraping off the paint face, facing the head, of the first connecting piece. According to the bolt, the first connecting piece and the second connecting piece can be firmly connected through the bolt, the first connecting piece and the second connecting piece can also be electrically connected through the bolt, and therefore the number of electric leads arranged between the first connecting piece and the second connecting piece is reduced, the structure is simplified, and the cost is reduced. The connecting operation between the first connecting piece and the second connecting piece is simplified, the assembly is simple, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially relates to a bolt and vehicle. BACKGROUND

[0002] Automobile parts cannot be separated from fasteners when being connected and assembled, the fasteners reliably connect two or more parts together and are widely used in automobile assembly. However, when the parts needing electricity are connected with the vehicle body, the fasteners can only fasten the parts due to the insulating paint surface on the parts needing electricity, and the conductive wire harness needs to be additionally added to make the parts needing electricity conductive with the vehicle body, thereby making the structure complex, the assembly process multiple and the cost increased. SUMMARY

[0003] The utility model discloses at least solve one of the prior art technical problems. Therefore, the utility model provides a bolt, the bolt reduces the setting of the conductive wire between the first connecting piece and the second connecting piece, simplifies the structure, simplifies the connecting operation between the first connecting piece and the second connecting piece, is simple to assemble, and reduces the cost.

[0004] The utility model further provides a vehicle comprising the above-mentioned bolt.

[0005] The bolt according to the utility model embodiment is used to fasten the first connecting piece and the second connecting piece, the first connecting piece has a first connecting hole, the second connecting piece has a second connecting hole, and the bolt comprises: a fastening part, the fastening part is arranged in the first connecting hole and the second connecting hole; a head part, one end of the fastening part in the length direction is connected with the head part, the head part is arranged on the side of the first connecting piece away from the second connecting piece, and is adapted to abut against the first connecting piece, the side of the head part facing the first connecting piece has a paint scraping protrusion, and the paint scraping protrusion is used to scrape off the paint surface of the first connecting piece facing the head part.

[0006] The bolt according to the utility model embodiment, by arranging the fastening part in the first connecting hole and the second connecting hole, connecting one end of the fastening part in the length direction with the head part, arranging the head part on the side of the first connecting piece away from the second connecting piece and adapted to abut against the first connecting piece, and arranging the paint scraping protrusion on the side of the head part facing the first connecting piece to scrape off the paint surface of the first connecting piece facing the head part, the bolt can realize the fastening connection between the first connecting piece and the second connecting piece and the electrical connection between the first connecting piece and the second connecting piece, thereby reducing the setting of the conductive wire between the first connecting piece and the second connecting piece, simplifying the structure, simplifying the connecting operation between the first connecting piece and the second connecting piece, being simple to assemble and reducing the cost.

[0007] In some embodiments of the utility model, along the fastening portion tightening direction, the height of the paint scraping protrusion gradually increases.

[0008] In some embodiments of the utility model, the included angle between the end face of the paint scraping protrusion towards the first connecting piece and the plane perpendicular to the fastening portion axis is 8-12 degrees.

[0009] In some embodiments of the utility model, the fastening portion includes: a body portion, the body portion is arranged in the first connecting hole and the second connecting hole, one end of the body portion in the length direction is connected with the head portion, a first threaded portion is arranged on the peripheral wall of the body portion, the first threaded portion includes first thread teeth spirally extending along the axial direction of the body portion, the first thread teeth are suitable for mutually matching with the internal thread of the second connecting piece, the peripheral side of the first threaded portion and the side away from the head portion have mounting holes, a second threaded portion is arranged in the mounting hole and on the peripheral wall of the body portion, the second threaded portion includes second thread teeth spirally extending along the axial direction of the body portion, the width of the second thread teeth is greater than the width of the first thread teeth at the same height along the radial direction of the body portion, and the second threaded portion is used for scraping the paint surface of the internal thread of the second connecting piece.

[0010] In some embodiments of the utility model, the tooth top angle of the second thread tooth is less than the tooth top angle of the first thread tooth, and / or, the height of the second thread tooth is less than the height of the first thread tooth along the radial direction of the body portion, and / or, the mounting hole is a plurality of mounting holes spaced apart along the circumferential direction of the body portion, the second threaded portion is a plurality of second threaded portions corresponding to the plurality of mounting holes one by one, and / or, the tooth bottom width of the second thread tooth is less than the tooth bottom width of the first thread tooth, and / or, the included angle between the two ends of the mounting hole along the circumferential direction of the body portion and the line connecting the center of the body portion is 30-90 degrees.

[0011] In some embodiments of the utility model, the body portion includes: a first body segment, the first body segment is suitable for being arranged in the second connecting hole, the first threaded portion and the second threaded portion are arranged on the peripheral wall of the first body segment, a second body segment, one end of the second body segment away from the first body segment is connected with the head portion, the second body segment is arranged on the side of the first body segment towards the head portion and is connected with the first body segment, the second body segment is suitable for being arranged in the first connecting hole, and the surface of the second body segment is smooth.

[0012] In some embodiments of the utility model, the diameter of the second body segment is less than the large diameter of the first thread tooth, and / or, the diameter of the second body segment is greater than the small diameter of the first thread tooth.

[0013] In some embodiments of the utility model, the bolt further comprises: a guide part, which is arranged at one end of the fastening part away from the head part and connected with the fastening part, and the diameter of the guide part gradually decreases in the direction from the head part to the fastening part.

[0014] In some embodiments of the utility model, the guide part is provided with a third threaded part on the peripheral wall, the third threaded part comprises third thread teeth extending spirally in the axial direction of the fastening part, and the line connecting the midpoint of the tooth top and the tooth bottom of the third thread teeth is perpendicular to the peripheral wall of the guide part.

[0015] In some embodiments of the utility model, the guide part is provided with a chip removal groove on the peripheral wall, and the chip removal groove extends along the length direction of the fastening part and penetrates through the guide part.

[0016] In some embodiments of the utility model, the chip removal groove is a plurality of chip removal grooves spaced apart in the circumferential direction of the guide part.

[0017] In some embodiments of the utility model, the paint scraping protrusion is a plurality of paint scraping protrusions arranged in the circumferential direction of the head part, and / or the surface of the bolt is provided with a lubricating layer.

[0018] The vehicle according to the embodiments of the utility model comprises: a first connecting piece, which is formed as an electric part, and is provided with a first connecting hole; a second connecting piece, which is formed as a vehicle body, and is provided with a second connecting hole; and the above-mentioned bolt, which is arranged in the first connecting hole and the second connecting hole.

[0019] According to the vehicle of the embodiments of the utility model, the fastening part is arranged in the first connecting hole and the second connecting hole, one end of the fastening part in the length direction is connected with the head part, the head part is arranged on the side of the first connecting piece away from the second connecting piece, and is adapted to abut against the first connecting piece, the side of the head part facing the first connecting piece is provided with a paint scraping protrusion, which is used for scraping the paint surface of the first connecting piece facing the head part, so that the bolt can realize the fastening connection and the electrical connection between the first connecting piece and the second connecting piece, thereby reducing the arrangement of the conductive wire between the first connecting piece and the second connecting piece, simplifying the structure, simplifying the connection operation between the first connecting piece and the second connecting piece, and reducing the cost.

[0020] The additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:

[0022] Figure 1 is a perspective view of a bolt according to an embodiment of the present utility model;

[0023] Figure 2 is a front view of a bolt according to an embodiment of the present utility model;

[0024] Figure 3 is a right view of a head of a bolt according to an embodiment of the present utility model;

[0025] Figure 4 is a front view of a paint scraping protrusion of a head of a bolt according to an embodiment of the present utility model;

[0026] Figure 5 is a sectional view of a fastening portion of a bolt according to an embodiment of the present utility model;

[0027] Figure 6 is a schematic view of a first thread and a second thread of a bolt according to an embodiment of the present utility model;

[0028] Figure 7 is a right view of a bolt according to an embodiment of the present utility model.

[0029] Reference Signs:

[0030] 10, bolt;

[0031] 1, fastening portion; 11, body portion; 111, first body segment; 112, second body segment; 12, first thread portion; 121, first thread; 13, second thread portion; 131, second thread;

[0032] 2, head; 21, paint scraping protrusion;

[0033] 3, guide portion; 31, chip removal groove. DETAILED DESCRIPTION

[0034] Embodiments of the present utility model are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present utility model, and cannot be understood as a limitation of the present utility model.

[0035] In the description of the utility model, it needs to be understood that, the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relation shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0036] In the description of the utility model, it needs to be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] Reference is made below Figures 1-7 The bolt 10 according to the embodiment of the utility model is described.

[0038] As Figures 1-2 shown, the bolt 10 according to the embodiment of the utility model comprises a fastening part 1 and a head part 2.

[0039] Specifically, referring to Figures 1-4 , the bolt 10 is used for fastening a first connecting piece and a second connecting piece, the first connecting piece has a first connecting hole, the second connecting piece has a second connecting hole, and the fastening part 1 is arranged in the first connecting hole and the second connecting hole; one end of the fastening part 1 in the length direction is connected with the head part 2, the head part 2 is arranged on the side of the first connecting piece away from the second connecting piece, and is adapted to abut against the first connecting piece, the side of the head part 2 facing the first connecting piece has a paint scraping protrusion 21 for scraping the paint surface of the first connecting piece facing the head part 2.

[0040] It needs to be explained that the bolt 10 is a conductive part, for example, a galvanized nickel alloy part, in the utility model, the first connecting piece is formed as an electric part, and the second connecting piece is formed as a vehicle body, which can be positive earth or negative earth.

[0041] It can be understood that the head 2 is arranged on the side of the first connecting piece away from the second connecting piece, and is adapted to abut against the first connecting piece. With the tightening of the bolt 10, the head 2 abuts against the first connecting piece, thereby realizing the fastening between the first connecting piece and the second connecting piece. The side of the head 2 facing the first connecting piece has a paint scraping protrusion 21. When the bolt 10 is tightened, the paint scraping protrusion 21 can rotate in the tightening direction of the bolt 10. When the paint scraping protrusion 21 contacts the side of the first connecting piece facing the head 2, the paint scraping protrusion 21 moves towards the first connecting piece and rotates in the tightening direction due to the continuous tightening of the bolt 10, thereby scraping the paint on the side of the first connecting piece facing the head 2, and realizing the electrical conduction between the head 2 and the first connecting piece.

[0042] Therefore, the bolt 10 can realize the fastening and electrical connection between the first connecting piece and the second connecting piece, thereby reducing the setting of the conductive wire between the first connecting piece and the second connecting piece, simplifying the structure, simplifying the connection operation between the first connecting piece and the second connecting piece, and reducing the cost.

[0043] Meanwhile, since the bolt 10 is continuously tightened, the paint scraping protrusion 21 moves towards the first connecting piece and rotates in the tightening direction, so that the side of the first connecting piece facing the head 2 is scraped by the paint scraping protrusion 21, forming a connecting groove matched with the paint scraping protrusion 21. Therefore, on the one hand, the connecting area of the paint scraping protrusion 21 and the first connecting piece is increased, and the conductive performance between the bolt 10 and the first connecting piece is increased. On the other hand, the connection reliability between the bolt 10 and the first connecting piece is also increased, so that the first connecting piece and the second connecting piece are reliably connected and installed.

[0044] Further, as shown in Figure 1 and Figure 2 the side of the head 2 away from the first connecting piece has an external hexagonal wrenching structure, thereby facilitating the tightening operation of the bolt 10. Of course, the side of the head 2 away from the first connecting piece can also have an internal hexagonal groove, a straight slot or a cross slot, etc.

[0045] According to the bolt 10, the fastening part 1 is arranged in the first connecting hole and the second connecting hole, one end of the fastening part 1 in the length direction is connected with the head part 2, the head part 2 is arranged on the side of the first connecting piece away from the second connecting piece, and is suitable for abutting against the first connecting piece, the side of the head part 2 facing the first connecting piece is provided with a paint scraping protrusion 21, which is used for scraping the paint surface of the first connecting piece facing the head part 2, so that the bolt 10 can realize the fastening connection between the first connecting piece and the second connecting piece, and can also realize the electrical connection between the first connecting piece and the second connecting piece, thereby reducing the arrangement of the conductive wire between the first connecting piece and the second connecting piece, simplifying the structure, simplifying the connection operation between the first connecting piece and the second connecting piece, and reducing the cost.

[0046] In some embodiments of the utility model, as shown in Figure 1 and Figure 4 , along the fastening part 1 tightening direction (as shown in Figure 4 a direction), the height of paint scraping protrusion 21 gradually increases. Thus, the end surface of paint scraping protrusion 21 facing the first connecting piece and the wall surface of paint scraping protrusion 21 facing the fastening part 1 tightening direction form an angle, which improves the sharpness of the connection between the end surface of paint scraping protrusion 21 facing the first connecting piece and the wall surface of paint scraping protrusion 21 facing the fastening part 1 tightening direction, thereby improving the paint scraping efficiency.

[0047] Among them, the wall surface of paint scraping protrusion 21 facing the fastening part 1 tightening direction is parallel to the fastener axis, thus, the end surface of paint scraping protrusion 21 facing the first connecting piece and the wall surface of paint scraping protrusion 21 facing the fastening part 1 tightening direction connection are more sharp, thereby further improving the paint scraping efficiency.

[0048] In some embodiments of the utility model, as shown in Figure 1 and Figure 4 , the angle between the end surface of paint scraping protrusion 21 facing the first connecting piece and the plane perpendicular to the fastening part 1 axis is 8°-12°, for example, 8°, 9°, 10° or 12°, etc. On the one hand, the angle between the end surface of paint scraping protrusion 21 facing the first connecting piece and the wall surface of paint scraping protrusion 21 facing the fastening part 1 tightening direction is not too large, which leads to the reduction of paint scraping efficiency; on the other hand, the height of paint scraping protrusion 21 along the fastening part 1 axis direction is not too high, which leads to the formation of a too deep connecting groove, affecting the structural strength of the first connecting piece.

[0049] In some embodiments of the utility model, as shown in Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, the fastening part 1 comprises a body part 11, a first threaded part 12 and a second threaded part 13. The body part 11 is arranged in the first connecting hole and the second connecting hole, and one end of the body part 11 in the length direction is connected with the head part 2. The first threaded part 12 is arranged on the peripheral wall of the body part 11, and the first threaded part 12 comprises first threaded teeth 121 extending spirally along the axial direction of the body part 11, the first threaded teeth 121 are adapted to be matched with the internal thread of the second connecting piece, and the side of the first threaded part 12 away from the head part 2 is provided with a mounting hole. Thus, the bolt 10 and the second connecting piece can be connected and fixed together through the matching of the first threaded teeth 121 and the internal thread of the second connecting piece, and then the head part 2 is abutted against the first connecting piece, so as to realize the connection and fixation between the first connecting piece and the second connecting piece.

[0050] Further, as shown in Figure 1 、 Figure 2 、 Figure 5 and Figure 6 , the second threaded part 13 is arranged in the mounting hole and on the peripheral wall of the body part 11, and the second threaded part 13 comprises second threaded teeth 131 extending spirally along the axial direction of the body part 11, and the width of the second threaded teeth 131 is greater than the width of the first threaded teeth 121 at the same height in the radial direction of the body part 11, and the second threaded part 13 is used to scrape the paint surface of the internal thread of the second connecting piece.

[0051] It can be understood that the surface of the second connecting piece (both the inner surface and the outer surface have a paint surface) has a paint surface, and since the first threaded teeth 121 are matched with the internal thread of the second connecting piece, the width of the second threaded teeth 131 is greater than the pitch of the internal thread of the second connecting piece at the same height in the radial direction of the body part 11, so that the second threaded teeth 131 interfere with the internal thread of the second connecting piece, and as the bolt 10 is tightened, the second threaded teeth 131 can remove the paint surface on the internal thread of the second connecting piece, so as to realize the conduction between the bolt 10 and the second connecting piece. Since the bolt 10 and the first connecting piece are also conductive, the conduction between the first connecting piece and the second connecting piece is realized.

[0052] Thus, the setting of the conduction wire between the first connecting piece and the second connecting piece can be further reduced, the structure is simplified, the connection operation between the first connecting piece and the second connecting piece is simplified, the assembly is simple, and the cost is reduced.

[0053] Meanwhile, since the second threaded portion 13 is arranged on the side of the first threaded portion 12 away from the head 2, the mounting direction of the bolt 10 is the direction from the head 2 to the fastening portion 1, so that with the mounting of the bolt 10, the second thread 131 can sequentially scrape the paint on the inner thread of the second connecting piece in the direction from the head 2 to the fastening portion 1, so that the paint on the inner thread of the second connecting piece in the entire area along the second connecting hole axis direction can be scraped, thereby improving the conductivity between the second connecting piece and the bolt 10.

[0054] In some embodiments of the utility model, as shown in Figure 6 , the tooth crest angle of the second thread 131 is smaller than the tooth crest angle of the first thread 121; thereby, the width of the second thread 131 is greater than the width of the first thread 121 at the same height along the radial direction of the body portion 11, so that the second threaded portion 13 can scrape the paint of the inner thread of the second connecting piece. For example, in the utility model, the tooth crest angle of the second thread 131 is 40°, and the tooth crest angle of the first thread 121 is 60°.

[0055] In some embodiments of the utility model, as shown in Figure 6 , along the radial direction of the body portion 11, the height of the second thread 131 is smaller than the height of the first thread 121; thereby, the interference degree between the second thread 131 and the inner thread of the second connecting piece when the bolt 10 is tightened can be reduced, so that the torque required when the bolt 10 is mounted is reduced, the assembly efficiency is improved, and the noise emitted when the bolt 10 is mounted is also reduced.

[0056] Further, as shown in Figure 6 , along the radial direction of the body portion 11, the height of the first thread 121 is h1, and the height of the second thread 131 is h2, 0.8h1≥h2≥0.7h1, for example, h2 is 0.8h1, 0.75h1, 0.7h1 or 0.78h1, etc. On the one hand, the height of the second thread 131 can be avoided to be too high, so that the interference degree between the second thread 131 and the inner thread of the second connecting piece is reduced, thereby reducing the torque required when the bolt 10 is mounted, improving the assembly efficiency, and reducing the noise emitted when the bolt 10 is mounted. On the other hand, the height of the second thread 131 can be avoided to be too low, so that the scraping efficiency of the paint of the inner thread of the second connecting piece is affected.

[0057] In some embodiments of the utility model, as shown in Figure 1 , Figure 2 and Figure 5 , the mounting hole is a plurality of mounting holes spaced apart along the circumferential direction of the body portion 11, and the second threaded portion 13 is a plurality of second threaded portions corresponding to the plurality of mounting holes; thereby, the scraping efficiency of the paint of the inner thread of the second connecting piece by the bolt 10 is improved.

[0058] For example, in the examples shown in Figure 1 , Figure 2 and Figure 5 , the second threaded portion 13 and the mounting hole are both two, but the utility model is not limited thereto, the second threaded portion 13 and the mounting hole can be more, for example, 3, 4, 5 or 6, etc.

[0059] In some embodiments of the utility model, as shown in Figure 6 , the root width of the second thread tooth 131 is less than the root width of the first thread tooth 121, it can be understood that, in the case of equal thread tooth height, the root width of the second thread tooth 131 determines the size of the crest angle, in the case of equal thread tooth height, the root width of the second thread tooth 131 is less than the root width of the first thread tooth 121, so that the crest angle of the second thread tooth 131 is less than the crest angle of the first thread tooth 121; thus, it is convenient to realize that the width of the second thread tooth 131 is greater than the width of the first thread tooth 121 along the radial direction of the body portion 11 at the same height, so that the second threaded portion 13 can scrape the paint of the second connecting piece internal thread.

[0060] In some embodiments of the utility model, the included angle between the two ends of the mounting hole along the circumferential direction of the body portion 11 and the line connecting the center of the body portion 11 is 30°-90°, for example, 30°, 40°, 50° or 90°, etc. Among them, it needs to be explained that when the mounting hole is multiple, the included angle between the two ends of each mounting hole along the circumferential direction of the body portion 11 and the line connecting the center of the body portion 11 is 30°-90°.

[0061] Thus, on the one hand, the area of the second threaded portion 13 can be avoided to be too large, so that the torque required when the bolt 10 is installed can be reduced, the assembly efficiency is improved, and the noise emitted when the bolt 10 is installed can also be reduced. On the other hand, the area of the second threaded portion 13 can be avoided to be too small, so that the efficiency of the bolt 10 scraping paint on the second connecting piece internal thread is ensured.

[0062] In some embodiments of the utility model, as shown in Figure 1 and Figure 2 , the body portion 11 comprises: a first body segment 111 and a second body segment 112, the first body segment 111 is adapted to be arranged in the second connecting hole, and the first threaded portion 12 and the second threaded portion 13 are arranged on the circumferential wall of the first body segment 111; the end of the second body segment 112 away from the first body segment 111 is connected with the head portion 2, the second body segment 112 is arranged on the side of the first body segment 111 facing the head portion 2 and connected with the first body segment 111, the second body segment 112 is adapted to be arranged in the first connecting hole, and the surface of the second body segment 112 is smooth.

[0063] It can be understood that the arrangement of the first body segment 111, the first threaded portion 12 and the second threaded portion 13 realizes the connection and fixation of the bolt 10 and the second connecting piece, and the arrangement of the second body segment 112 realizes the positioning of the bolt 10 and the first connecting piece, and the smooth surface of the second body segment 112 facilitates the adjustment and movement of the first connecting piece.

[0064] In some embodiments of the utility model, as shown in Figure 1 and Figure 2 , the diameter of the second body segment 112 is smaller than the major diameter of the first thread 121; it can be understood that, since the diameter of the second body segment 112 is smaller than the major diameter of the first thread 121, the diameter of the second body segment 112 is smaller than the first connecting hole, that is, the second body segment 112 is spaced apart from the hole wall of the first connecting hole, thereby, when the head 2 is spaced apart from the first connecting piece, the first connecting piece can be adjusted in the radial direction of the fastening part 1, thereby improving the assembly accuracy and efficiency.

[0065] In some embodiments of the utility model, as shown in Figure 1 and Figure 2 , the diameter of the second body segment 112 is greater than the minor diameter of the first thread 121. Thus, the strength of the second body segment 112 can be ensured, and the upper limit of the torque that the second body segment 112 can withstand is improved, so that the bolt 10 can provide sufficient axial force to ensure reliable fastening.

[0066] In some embodiments of the utility model, as shown in Figure 1 , Figure 2 and Figure 7 , the bolt 10 further comprises a guide part 3, the guide part 3 is arranged at one end of the fastening part 1 away from the head 2 and connected with the fastening part 1, and the diameter of the guide part 3 gradually decreases in the direction from the head 2 to the fastening part 1. It can be understood that, since the installation direction of the bolt 10 is in the direction from the head 2 to the fastening part 1, the diameter of the guide part 3 gradually decreases in the direction from the head 2 to the fastening part 1, which facilitates the bolt 10 to enter the first connecting hole and the second connecting hole, thereby improving the assembly efficiency.

[0067] In some embodiments of the utility model, the guide part 3 has a third threaded portion (not shown) on the peripheral wall, the third threaded portion comprises third thread teeth extending spirally in the axial direction of the fastening part 1, and the line connecting the midpoint of the tooth top and the tooth bottom of the third thread teeth is perpendicular to the peripheral wall of the guide part 3.

[0068] It can be understood that, since the diameter of the guide portion 3 gradually decreases in the direction from the head portion 2 to the fastening portion 1, an acute angle is formed between the peripheral wall of the guide portion 3 and the axis of the fastening portion 1, and since the line connecting the tooth top and the tooth bottom midpoint of the third thread is perpendicular to the peripheral wall of the guide portion 3, an acute angle is formed between the line connecting the tooth top and the tooth bottom midpoint of the third thread and the axis of the fastening portion 1, and since the line connecting the tooth top and the tooth bottom midpoint of the first thread 121 is perpendicular to the axis of the fastening portion 1, the line connecting the tooth top and the tooth bottom midpoint of the first thread 121 forms an included angle with the line connecting the tooth top and the tooth bottom midpoint of the third thread, so that the third thread interferes with the internal thread of the second connecting piece, and the third thread can scrape the paint film of the internal thread of the second connecting piece, thereby further improving the scraping efficiency of the paint film of the internal thread of the second connecting piece and improving the electrical conductivity between the bolt 10 and the second connecting piece.

[0069] In some embodiments of the utility model, as shown in Figure 1 and Figure 7 , the peripheral wall of the guide portion 3 is provided with a chip removal groove 31, and the chip removal groove 31 extends along the length direction of the fastening portion 1 and penetrates the guide portion 3. It can be understood that, due to the arrangement of the chip removal groove 31, the paint chips scraped by the bolt 10 can be discharged, so that the paint chips are prevented from accumulating between the bolt 10 and the first connecting piece and the second connecting piece to cause assembly interference and damage to the parts, thereby improving the assembly efficiency and ensuring the service life of the parts.

[0070] Further, in the radial direction of the guide portion 3, the depth of the chip removal groove 31 is s, and the major diameter of the first thread 121 is r, and r / 2 >= s >= r / 3, for example, s = r / 2, r / 3 or 5r / 12, etc. In this way, on the one hand, the chip removal efficiency is ensured, and on the other hand, the structural strength of the guide portion 3 is ensured.

[0071] In some embodiments of the utility model, as shown in Figure 1 and Figure 7 , the chip removal groove 31 is a plurality of chip removal grooves spaced apart in the circumferential direction of the guide portion 3. In this way, the paint chip discharge efficiency is improved, and the paint chips are further prevented from accumulating between the bolt 10 and the first connecting piece and the second connecting piece to cause assembly interference and damage to the parts, thereby further improving the assembly efficiency and further ensuring the service life of the parts.

[0072] For example, in the examples shown in Figure 1 and Figure 7 , the chip removal groove 31 is three, but the utility model is not limited thereto, and the chip removal groove 31 can also be other numbers, for example, 4, 5, 6 or 2, etc.

[0073] In some embodiments of the utility model, as shown in Figure 1 and Figure 3As shown, the paint scraping protrusions 21 are arranged in the circumferential direction of the head 2; thus, the paint scraping efficiency of the bolt 10 on the paint surface of the first connecting piece towards the side of the head 2 is improved. Figure 1 and Figure 3 In the example shown, the paint scraping protrusions 21 are 24, but the utility model is not limited thereto, and the paint scraping protrusions 21 can also be other numbers, such as 10, 15, 20 or 30, etc.

[0074] In some embodiments of the utility model, the surface of the bolt 10 has a lubricating layer. Thus, the torque required during installation of the bolt 10 can be reduced, the assembly efficiency is improved, and the noise generated during installation of the bolt 10 can also be reduced.

[0075] A vehicle according to embodiments of the utility model is described below.

[0076] The vehicle according to embodiments of the utility model comprises a first connecting piece and a second connecting piece.

[0077] Specifically, the first connecting piece is formed as an electrical component, and the first connecting piece has a first connecting hole; the second connecting piece is formed as a vehicle body, and the second connecting piece has a second connecting hole; the bolt 10 described above is arranged in the first connecting hole and the second connecting hole.

[0078] It can be understood that the side of the head 2 towards the first connecting piece has the paint scraping protrusions 21, which are used to scrape off the paint surface of the first connecting piece towards the head 2, so that the bolt 10 can realize both the fastening connection and the electrical connection between the first connecting piece and the second connecting piece, thereby reducing the setting of the conductive wire between the first connecting piece and the second connecting piece, simplifying the structure, simplifying the connection operation between the first connecting piece and the second connecting piece, and simplifying assembly and reducing cost.

[0079] According to the vehicle of the utility model, by arranging the bolt 10 described above, the fastening part 1 is arranged in the first connecting hole and the second connecting hole, one end of the fastening part 1 in the length direction is connected with the head 2, the head 2 is arranged on the side of the first connecting piece away from the second connecting piece and is adapted to abut against the first connecting piece, the side of the head 2 towards the first connecting piece has the paint scraping protrusions 21, which are used to scrape off the paint surface of the first connecting piece towards the head 2, so that the bolt 10 can realize both the fastening connection and the electrical connection between the first connecting piece and the second connecting piece, thereby reducing the setting of the conductive wire between the first connecting piece and the second connecting piece, simplifying the structure, simplifying the connection operation between the first connecting piece and the second connecting piece, simplifying assembly and reducing cost.

[0080] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0081] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A bolt for fastening a first connecting member and a second connecting member, the first connecting member having a first connecting hole, the second connecting member having a second connecting hole, characterized by, The bolt comprises: a fastening portion, which is arranged in the first connecting hole and the second connecting hole; a head portion, which is connected to one end of the fastening portion in the length direction, is arranged on the side of the first connecting member away from the second connecting member, and is adapted to abut against the first connecting member, the side of the head portion facing the first connecting member is provided with a paint scraping protrusion for scraping the paint surface of the first connecting member facing the head portion.

2. The bolt of claim 1, wherein The height of the paint scraping protrusion gradually increases in the tightening direction of the fastening portion.

3. The bolt of claim 2, wherein The included angle between the end surface of the paint scraping protrusion facing the first connecting member and the plane perpendicular to the axis of the fastening portion is 8°-12°.

4. A bolt according to any one of claims 1-3, characterised in that The fastening portion comprises: a body portion, which is arranged in the first connecting hole and the second connecting hole, and one end of the body portion in the length direction is connected to the head portion; a first threaded portion, which is arranged on the peripheral wall of the body portion, comprises first thread teeth extending spirally in the axial direction of the body portion, and is adapted to cooperate with the internal thread of the second connecting member, and the side of the first threaded portion away from the head portion is provided with a mounting hole; a second threaded portion, which is arranged in the mounting hole and on the peripheral wall of the body portion, comprises second thread teeth extending spirally in the axial direction of the body portion, and the width of the second thread teeth is greater than that of the first thread teeth at the same height in the radial direction of the body portion, and the second threaded portion is used for scraping the paint surface of the internal thread of the second connecting member.

5. The bolt of claim 4, wherein The tooth top angle of the second thread teeth is smaller than that of the first thread teeth. And / or, the height of the second thread teeth is smaller than that of the first thread teeth in the radial direction of the body portion.

6. The bolt of claim 4, wherein The body portion comprises: a first body segment, which is adapted to be arranged in the second connecting hole, and the first threaded portion and the second threaded portion are arranged on the peripheral wall of the first body segment; a second body segment, one end of which away from the first body segment is connected to the head portion, and the second body segment is arranged on the side of the first body segment facing the head portion and connected to the first body segment, is adapted to be arranged in the first connecting hole, and the surface of the second body segment is smooth.

7. The bolt of claim 6, wherein The diameter of the second body segment is smaller than the large diameter of the first thread teeth. And / or, the diameter of the second body segment is greater than the small diameter of the first thread teeth.

8. A bolt according to any one of claims 1-3, characterised in that Further comprising: a guide portion, which is arranged at one end of the fastening portion away from the head portion and connected to the fastening portion, and the diameter of the guide portion gradually decreases in the direction from the head portion to the fastening portion.

9. The bolt of claim 8, wherein, A chip removal groove is arranged on the peripheral wall of the guide portion, which extends in the length direction of the fastening portion and penetrates through the guide portion.

10. A vehicle characterized by comprising: Comprise: a first connecting member, which is formed as an electrical component, and is provided with a first connecting hole; a second connecting member, which is formed as a vehicle body, and is provided with a second connecting hole; The bolt according to any one of claims 1 to 9 is inserted into the first connection hole and the second connection hole.

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