Fastener and assembly component

Abstract

The utility model provides a fastener and an assembly component, the fastener comprises a first screw joint piece and a second screw joint piece, the first screw joint piece comprises a first screw joint head and a first screw joint rod which are connected, the first screw joint rod is provided with a first external thread, the first screw joint piece is provided with a penetrating hole, the penetrating hole is arranged in a step shape, and the second screw joint head is provided with a second external thread. The second screw joint piece comprises a second screw joint head and a connecting rod which are connected, the second screw joint piece rotatably penetrates through the penetrating hole, the second screw joint head abuts against the first step face, and the connecting rod is provided with a screw joint section at least partially extending out of the penetrating hole. The screw joint section is provided with a second external thread, the thread screwing direction of the second external thread is opposite to the thread screwing direction of the first external thread, and when vibration or torsion is borne, the first screw joint piece and the second screw joint piece tend to be tightened mutually, and additional anti-loosening protection is provided. And the second screwing head part is propped against the first step surface, so that the operation difficulty in a narrow space is also reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastening technical field, concretely relates to fastener and assembly assembly. BACKGROUND

[0002] In the related art, there are various types of fasteners. For example, a screw fastener includes a hollow screw body, a lower end of the screw body is provided with an anti-loosening assembly, the anti-loosening assembly includes a plurality of screw blocks arranged at the lower end of the screw body, the outer wall of each screw block is provided with a thread, the screw blocks are arranged at intervals, each screw block is arranged below the screw body through a guide assembly, a limiting assembly is arranged between each screw block and the screw body, each screw block and another screw block are fixedly connected through an elastic assembly, each screw block and another screw block are positioned through a positioning assembly, the inner wall of each screw block and another screw block forms a circular hole, the diameter of the circular hole is smaller than the diameter of the hollow screw body, a driving stud is arranged on the screw body, the driving stud passes through the hollow screw body and the circular hole, and the screw blocks are pushed apart through the taper surface of the driving stud, so that the screw blocks exert pressure on the screw holes for threaded connection with the screw fastener to achieve the anti-loosening effect. However, the screw fastener has a complex structure and is difficult to operate in a narrow space. SUMMARY

[0003] The embodiments of the utility model provide a kind of fastener and assembly assembly, can improve the technical problem of difficult operation of screw fastener in narrow space while having anti-loosening effect in the related art.

[0004] In the first aspect, the embodiments of the utility model provide a kind of fastener.

[0005] In an embodiment, the fastener includes:

[0006] The first screw joint includes a first screw head and a first screw rod connected along the length direction, the first screw rod is provided with a first external thread, the first screw joint is provided with a through hole, the through hole is arranged through the first screw head and the first screw rod, and the through hole is arranged in steps to form a first step surface away from the free end of the first screw rod.

[0007] The second screw joint includes a second screw head and a connecting rod connected along the length direction, the second screw joint is rotatably arranged in the through hole, and the second screw head is in abutment with the first step surface, the connecting rod has a screwing segment at least partially extending out of the through hole, the screwing segment is provided with a second external thread, and the screw thread direction of the second external thread is opposite to that of the first external thread.

[0008] In an embodiment, the through hole comprises a first hole section and a second hole section which are in communication, and the first step surface is arranged towards the first hole section;

[0009] The second threaded head is arranged in the first hole section, and an outer side wall of the second threaded head is arranged in spaced relation with a side wall of the first hole section.

[0010] In an embodiment, along a length direction of the first threaded member, a cross section of the first hole section is circular; and / or,

[0011] along a length direction of the first threaded member, a cross section of the second threaded head is circular; and / or,

[0012] The connecting rod is arranged in the second hole section, and an outer side wall of the connecting rod is arranged in at least partially spaced relation with a side wall of the second hole section.

[0013] In an embodiment, a side of the second threaded head which is away from the connecting rod is provided with an operation groove which is adapted to be fitted with a mounting wrench, and the operation groove has a plurality of edges which are arranged in spaced relation along a circumferential direction of the second threaded head.

[0014] In an embodiment, the fastener further comprises a rotation-stopping structure which is arranged between the first threaded head and the second threaded head, and the rotation-stopping structure comprises a rotation-stopping portion and a cooperating portion which is in rotation-stopping cooperation with the rotation-stopping portion, one of the rotation-stopping portion and the cooperating portion is arranged in the first threaded head, and the other is arranged in the second threaded head.

[0015] In an embodiment, the first threaded head is provided with a first mounting hole which is arranged in extension along a radial direction of the first threaded rod and is in communication with the through hole, and the rotation-stopping portion comprises a plug which is inserted in the first mounting hole, and the plug has a first insertion end and a second insertion end which are arranged in opposite relation, and the first insertion end is outside the first mounting hole.

[0016] The cooperating portion comprises a second mounting hole which is arranged in the second threaded head and is arranged in extension along a radial direction of the first threaded rod, and the second insertion end is inserted in the second mounting hole.

[0017] In an embodiment, the first mounting hole penetrates through the first threaded head, and the second mounting hole penetrates through the second threaded head.

[0018] The second insertion end is arranged in such a manner that it penetrates through the second mounting hole and extends out of the first mounting hole.

[0019] In an embodiment, the second insertion end is arranged in such a manner that it is bent towards a direction which is away from a side wall of the plug.

[0020] In an embodiment, a groove is arranged on the side of the second screw joint away from the connecting rod, and the groove is communicated with the second mounting hole.

[0021] In an embodiment, a boss is arranged on the side wall of the first insertion end adjacent to the insertion pin, and the boss is used to abut against the periphery of the first mounting hole.

[0022] In an embodiment, the second mounting holes are arranged one by one and are arranged at intervals along the circumference of the first screw rod.

[0023] In a second aspect, an embodiment of the utility model provides an assembly component.

[0024] In an embodiment, a through hole is arranged through the first to-be-fixed part along the thickness direction of the first to-be-fixed part;

[0025] The second to-be-fixed part is abutted against the first to-be-fixed part, a first threaded hole is arranged on the side of the second to-be-fixed part facing the first to-be-fixed part, the first threaded hole comprises a first threaded hole section and a second threaded hole section arranged in sequence and communicated in the direction away from the first to-be-fixed part, the diameter of the first threaded hole section is greater than the diameter of the second threaded hole section, and the screw rotation directions of the first threaded hole section and the second threaded hole section are opposite.

[0026] The fastener as described above, the free end of the first screw rod is sequentially threaded connected with the first threaded hole section and the second threaded hole section through the through hole and the second threaded hole section.

[0027] The embodiment of the utility model has the advantages of:

[0028] In the embodiment of the utility model, when two to be fixed parts are fixed through the fastener, the overhang is set on one to be fixed part, the first screw joint is first screwed with the first screw hole through the overhang, then the second screw joint is screwed through the hole, the screw joint of the second screw joint that stretches out the hole is screwed with the first screw hole, because the screw thread of the first screw joint and the second screw joint is opposite, when being subjected to vibration or torsion, they will tend to tighten each other, thereby providing additional anti-loose protection. When the head of the second screw joint abuts against the step surface in the first screw joint, a mechanical block is formed, preventing the second screw joint from moving in the axial direction. Combined with the opposite screw thread design, this helps the fastener to remain stable when subjected to vibration or dynamic load, and is not easy to loosen. The rotatable mounting mode allows the user to fine-tune the position or pre-tightening force of the entire fastener by rotating the second screw joint. The contact and abutment between the second screw joint and the first screw joint can distribute the load and improve the structural strength and carrying capacity of the overall fastener. The design that the second screw joint abuts against the first step surface allows the second screw joint to rotate without completely detaching from the first screw joint, which is simple in structure and makes the installation and disassembly process of the fastener more convenient, and also reduces the difficulty of operation in a small space. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0030] Figure 1 It is the three-dimensional schematic view of the fastener provided by the embodiment of the utility model;

[0031] Figure 2 It is Figure 1 The front view schematic view of the fastener shown in the figure;

[0032] Figure 3 It is Figure 1 The top view schematic view of the fastener shown in the figure;

[0033] Figure 4 It is Figure 1 The sectional view schematic view of the fastener shown in the figure;

[0034] Figure 5 It is the structural schematic view of the assembly component provided by the embodiment of the utility model;

[0035] Figure 6 It is Figure 5 The front view schematic view of the assembly component shown in the figure;

[0036] Figure 7 yes Figure 5 A schematic cross-sectional view of the assembly shown.

[0037] Description of Figure Numbers:

[0038] 100. Assemble components;

[0039] 10. Fasteners;

[0040] 1. First screw connection member, 11. First screw connection portion, 111. First mounting hole, 12. First screw connection rod, 13. Through hole, 131. First step surface, 132. First hole section, 133. Second hole section;

[0041] 2. Second screw connection member, 21. Second screw connection portion, 211. Operating groove, 2111. Edge, 212. Groove, 213. Second mounting hole, 22. Connecting rod, 221. Screw connection section;

[0042] 31. Anti-rotation portion, 311. Latch, 3111. First insertion end, 3112. Second insertion end, 3113. Boss, 32. Mating portion;

[0043] 20. First portion to be fixed, 201. Via hole;

[0044] 30. Second portion to be fixed, 301. First threaded hole, 3011. First threaded hole section, 3012. Second threaded hole section. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0046] In the related art, there are many types of fasteners. Taking screw fasteners as an example, a screw fastener includes a hollow screw body, a lower end of the screw body is provided with an anti-loosening assembly, and the anti-loosening assembly includes a plurality of screw blocks provided at the lower end of the screw body, the outer wall of the screw block is provided with threads, the screw blocks are spaced apart from each other, the screw blocks are arranged below the screw body through a guide assembly, a limit assembly is provided between the screw block and the screw body, the screw block and the other screw block are fixedly connected by an elastic assembly, and the screw block and the other screw block are positioned by a positioning assembly, and a circular hole is formed on the inner wall of the screw block and the other screw blocks, the diameter of the circular hole is smaller than the diameter of the hollow screw body, and a driving screw is provided on the screw body. The driving stud passes through the hollow screw body and the circular hole, and the tapered surface of the driving stud pushes the screw block open. The pushed-open screw block applies pressure to the screw hole used for threaded connection with the screw fastener to achieve an anti-loosening effect. However, this type of screw fastener has a complex structure and is difficult to operate in a small space.

[0047] In view of this, the utility model proposes a fastener, Figures 1 to 4 This is a structural schematic diagram of an embodiment of the fastener provided by the utility model. The fastener provided by the utility model has an anti-loosening effect while reducing the difficulty of operation in a small space. The fastener will be described in detail below in conjunction with the main drawings.

[0048] See also Figures 1 to 4 The fastener 10 includes a first screw member 1 and a second screw member 2. The first screw member 1 includes a first screw joint portion 11 and a first screw rod 12 connected along its length direction. The first screw rod 12 is provided with a first external thread. The first screw member 1 is provided with a through hole 13. The through hole 13 passes through the first screw joint portion 11 and the first screw rod 12. The through hole 13 is stepped to form a first step surface 131 away from the free end of the first screw rod 12. The second screw member 2 includes a second screw joint portion 21 and a connecting rod 22 connected along its length direction. The second screw member 2 is rotatably penetrated in the through hole 13, and the second screw joint portion 21 is abutted against the first step surface 131. The connecting rod 22 has a screw section 221 that at least partially extends out of the through hole 13. The screw section 221 is provided with a second external thread. The thread rotation direction of the second external thread is opposite to that of the first external thread.

[0049] In the embodiment of the utility model, when two to be fixed parts are fixed through fastener 10, one to be fixed part is provided with through hole, the other to be fixed part is provided with first threaded hole, first screw joint 1 is first screwed with first threaded hole through through hole 201, then second screw joint 2 is screwed through through hole 13, make the screwing segment 221 of second screw joint 2 that stretches out through hole 13 is screwed with first threaded hole, because the thread rotation direction of first screw joint 1 and second screw joint 2 is opposite, when being subjected to vibration or torsion, they will tend to tighten each other, thereby providing additional anti-loose protection. When the head of second screw joint 2 abuts against the step surface in first screw joint 1, a mechanical block is formed, preventing second screw joint 2 from moving in the axial direction. Combined with the thread design of opposite rotation direction, this helps fastener 10 to remain stable when subjected to vibration or dynamic load, and is not easy to loosen. The rotatable mounting mode allows the user to fine-tune the position or pre-tightening force of the entire fastener 10 by rotating second screw joint 2. The contact and abutment between second screw joint 2 and first screw joint 1 can distribute the load and improve the structural strength and carrying capacity of the overall fastener 10. The design of second screw joint head 21 abutting against first step surface 131 allows second screw joint 2 to be rotated without completely detaching from first screw joint 1, which is simple in structure and makes the installation and disassembly process of fastener 10 more convenient, while also reducing the difficulty of operation in a small space.

[0050] It should be noted that in the embodiments of the present application, the cross section of the first screw joint head 11 is hexagonal along the length direction of the first screw joint 1. In the embodiments of the present application, the cross section of the first screw joint head 11 can also be triangular, quadrangular or pentagonal, etc. The shape of the cross section of the first screw joint head 11 can be set as needed, and the present application does not limit it.

[0051] Referring to Figure 4In one embodiment, the through hole 13 includes a first hole section 132 and a second hole section 133 that are interconnected. The first step surface 131 is disposed toward the first hole section 132. The second screw joint 21 is mounted within the first hole section 132, and the outer sidewall of the second screw joint 21 is spaced apart from the sidewall of the first hole section 132. This spacing between the second screw joint 21 and the sidewall of the first hole section 132 prevents direct contact between the second screw joint 21 and the sidewall of the first hole section 132, reducing friction between the second screw joint 21 and the sidewall of the first hole section 132 and extending the service life of the fastener 10. The presence of a gap between the second screw joint 21 and the sidewall of the first hole section 132 allows for smoother rotation of the second screw member 2, reducing resistance and making adjustment of the fastener 10 easier for the operator. The presence of the gap makes it easier to insert the second screw member 2 into the first hole section 132 during installation and provides greater flexibility during fine-tuning, making it easier to achieve the desired preload force or position. In environments with large temperature fluctuations, materials may expand and contract. The reserved gap provides a buffer for these dimensional changes, preventing jamming or damage caused by thermal expansion. The spacing between the outer wall of the second screw joint 21 and the sidewall of the first hole section 132 facilitates maintenance or replacement of the second screw connector 2, reducing the inconvenience caused by component jamming or difficulty in separation.

[0052] Reference Figure 3 In one embodiment, the cross-section of the first hole segment 132 is circular along the length direction of the first screw connector 1. In this way, the circular cross-section can provide uniform stress distribution and avoid the formation of stress concentration points, which helps to prevent cracks from forming in the through hole 13 and prolong the service life of the first screw connector 1. The cross-section of the first hole segment 132 is circular, that is, the first hole segment 132 is a circular hole segment. Circular hole segments are easier to process than square or other complex-shaped hole segments, which reduces manufacturing difficulty and cost, and also reduces quality problems caused by processing errors. The circular hole segment facilitates the insertion and positioning of the second screw connector 2, and does not require precise diagonal alignment during assembly, which improves assembly speed and efficiency. In addition, the circular cross-section has higher bending and torsional strength, which means that the first hole segment 132 can withstand larger loads without easily deforming.

[0053] It should be noted that in other embodiments, along the length direction of the first screw component 1, the cross-section of the first hole section 132 can also be a triangle, a quadrilateral, a pentagon or a hexagon, etc. The shape of the cross-section of the first hole section 132 can be set as needed, and this application does not limit this.

[0054] Continue to refer to Figure 3In one embodiment, the cross-section of the second screw joint portion 21 is circular along the length direction of the first screw joint 1, so that the second screw joint portion 21 is arranged in a cylindrical shape. The cylindrical second screw joint portion 21 can more effectively disperse the force applied thereto, prevent excessive local stress, and reduce fatigue and potential fracture risks of the second screw joint portion 21. The cylindrical second screw joint portion 21 is visually smoother and can provide a better appearance. The edges of the cylindrical second screw joint portion 21 do not have sharp corners, which reduces the risk of damage to surrounding materials or the human body during the assembly process. The manufacturing process of the cylindrical second screw joint portion 21 is relatively simple, and the mold design and processing process are relatively easy, which helps to reduce costs.

[0055] It should be noted that in other embodiments, along the length direction of the first screw joint 1, the cross-section of the second screw joint portion 21 can also be a triangle, a quadrilateral, a pentagon or a hexagon, etc. The shape of the cross-section of the second screw joint portion 21 can be set as needed, and this application does not limit this.

[0056] In addition, along the length direction of the first screw component 1, the circular cross-section of the first hole section 132 and the circular cross-section of the second screw joint portion 21 can be set selectively or simultaneously. When both are set simultaneously, the effect is best.

[0057] Reference Figure 4 In one embodiment, the connecting rod 22 is mounted in the second hole section 133, and the outer wall of the connecting rod 22 is at least partially spaced from the side wall of the second hole section 133. This reduces friction between the outer wall of the connecting rod 22 and the side wall of the second hole section 133, reduces wear on the outer wall of the connecting rod 22 and the side wall of the second hole section 133 during long-term use, and extends the service life of the fastener 10. The at least partial spacing allows the connecting rod 22 to rotate more freely within the second hole section 133, reducing rotational resistance and making the operator more labor-efficient when tightening or loosening. The at least partial spacing design allows space for thermal expansion of the side walls of the connecting rod 22 and the second hole section 133 during temperature changes, preventing jamming caused by thermal expansion and contraction, thereby maintaining the normal function of the fastener 10. The at least partial spacing makes it easier to insert or remove the connecting rod 22 from the second hole section 133 during installation and removal, reducing the difficulty and time consumption during the assembly process. The at least partially spaced design makes it easier to maintain or replace the connecting rod 22 , and reduces the inconvenience caused by the outer side wall of the connecting rod 22 being tightly fitted to the side wall of the second hole section 133 .

[0058] Reference Figure 3 and Figure 4In one embodiment, an operating groove 211 is provided on the side of the second screw joint 21 facing away from the connecting rod 22. The operating groove 211 is adapted to accommodate an installation wrench. The operating groove 211 has multiple edges 2111 spaced apart along the circumference of the second screw joint 21. This ensures efficient torque transmission between the operating groove 211 and the installation wrench. The multiple edges 2111 provide more contact points, reducing the possibility of slippage between the installation wrench and the second screw joint 21 during tightening or loosening. The multiple edges 2111 evenly distribute torque across multiple contact surfaces, reducing stress at each contact point, thereby lowering material wear and extending the service life of the second screw joint 21.

[0059] Reference Figure 1 、 Figure 3 and Figure 4 In one embodiment, the fastener 10 further includes a rotation-stopping structure disposed between the first screw joint portion 11 and the second screw joint portion 21. The rotation-stopping structure includes a rotation-stopping portion 31 and a mating portion 32 that cooperates with the rotation-stopping portion 31 to prevent rotation. One of the rotation-stopping portion 31 and the mating portion 32 is disposed on the first screw joint portion 11, and the other is disposed on the second screw joint portion 21. Thus, the main purpose of the rotation-stopping structure is to prevent relative rotation between the first screw joint portion 11 and the second screw joint portion 21. This is particularly critical when the fastener 10 is subjected to force, thereby ensuring the stability and reliability of the fastener 10. When the fastener 10 is subjected to vibration or dynamic loads, the rotation-stopping structure can prevent loosening between the first screw joint portion 11 and the second screw joint portion 21, thereby improving the structural integrity and rigidity of the entire fastener 10. By limiting the relative movement between the first screw joint portion 11 and the second screw joint portion 21, the rotation-stopping structure helps to more accurately control the preload force of the fastener 10. The anti-rotation structure reduces the tendency of the fastener 10 to loosen during use, thereby reducing the frequency of regular inspection and maintenance of the fastener 10 and extending its service life.

[0060] Reference Figure 1 、 Figure 3 and Figure 4In one embodiment, the first screw joint portion 11 is provided with a first mounting hole 111, and the first mounting hole 111 is extended along the radial direction of the first screw rod 12 and is connected to the through hole 13. The anti-rotation portion 31 includes a pin 311 inserted in the first mounting hole 111, and the pin 311 has a first insertion end 3111 and a second insertion end 3112 arranged opposite to each other, and the first insertion end 3111 is outside the first mounting hole 111. The matching portion 32 includes a second mounting hole 213 provided in the second screw joint portion 21, and the second mounting hole 213 is extended along the radial direction of the first screw rod 12, and the second insertion end 3112 is inserted in the second mounting hole 213. In this way, the combined design of the pin 311 and the second mounting hole 213 can effectively prevent relative rotation between the first screw joint portion 11 and the second screw joint portion 21, thereby maintaining the stability of the fastener 10, especially in an environment subjected to vibration or dynamic loads. The latch 311, as the anti-rotation portion 31, cooperates with the second mounting hole 213 on the second screw joint portion 21, thereby increasing the structural rigidity of the fastener 10, helping to resist external stress, and maintaining the pre-tightening force of the fastener 10. The design of the latch 311 of the anti-rotation structure allows for assembly by simply inserting the latch 311 into the first mounting hole 111, and then aligning and inserting it into the second mounting hole 213, thereby simplifying the assembly steps and improving production efficiency. If the fastener 10 needs to be disassembled or adjusted, the latch 311 can be easily pulled out of the first mounting hole 111 and the second mounting hole 213, making maintenance and replacement operations easier. The latch 311 and the second mounting hole 213 cooperate to achieve anti-rotation, and its manufacturing and assembly costs are relatively low, while providing a high-performance fastening effect, with a high cost-effectiveness.

[0061] It should be noted that, in other embodiments, the anti-rotation portion 31 includes a bolt inserted into the first mounting hole 111, and the mating portion 32 includes a second threaded hole provided in the second screw joint portion 21, the second threaded hole is extended radially along the first screw rod 12, and the screw section 221 of the bolt is threadedly connected to the second threaded hole.

[0062] Reference Figure 4In one embodiment, the first mounting hole 111 extends through the first screw joint portion 11, the second mounting hole 213 extends through the second screw joint portion 21, and the second insertion end 3112 extends through the second mounting hole 213 and out of the first mounting hole 111. This allows the second insertion end 3112 to extend through the second mounting hole 213 and out of the first mounting hole 111, creating a mechanical locking effect, enhancing the connection stability between the first screw joint portion 11 and the second screw joint portion 21 and reducing relative movement. This through-type latch 311 design more effectively prevents relative rotation between the first screw joint portion 11 and the second screw joint portion 21, ensuring that the fastener 10 remains secure even when subjected to external loads or vibration. The through-type latch 311 design makes installation and removal of the latch 311 simpler and faster, requiring only insertion or removal from one end, improving assembly and disassembly efficiency. The through-type latch 311 also enhances its visibility, making it easier to confirm its presence and status during routine maintenance and inspection, thereby ensuring the continued reliability of the fastener 10.

[0063] Reference Figure 4 In one embodiment, the second insertion end 3112 is bent away from the side wall of the latch pin 311. This bent second insertion end 3112 forms a tighter mechanical lock with the second screw joint portion 21, preventing the latch pin 311 from withdrawing from the first mounting hole 111 and the second mounting hole 213 when subjected to vibration or external forces, thereby improving the stability of the fastener 10. During assembly, the latch pin 311 can be initially inserted in a straight line. Once the latch pin 311 is in place, the second insertion end 3112 can be bent away from the side wall of the latch pin 311 manually or with a tool. This facilitates initial insertion while providing a secure lock in the final position, simplifying the assembly process.

[0064] It should be noted that the second insertion end 3112 can be bent to abut against the periphery of the first mounting hole 111, so that the friction between the pin 311 and the first screw joint part 11 can be increased, the loosening caused by vibration can be reduced, and the fastener 10 can be ensured to maintain a pre-tightened state for a long time.

[0065] Reference Figure 3 and Figure 4 In one embodiment, a groove 212 is provided on the side of the second screw joint 21 facing away from the connecting rod 22. Groove 212 communicates with the second mounting hole 213. This arrangement allows the operator to visually observe the positioning of the latch 311 during assembly, avoiding blind operation, reducing the probability of assembly errors, and improving assembly efficiency. The design of groove 212 reduces material usage, lowering the manufacturing cost and weight of the fastener 10 while ensuring its functionality and reliability.

[0066] Reference Figure 2 、Figure 3 and Figure 4 In one embodiment, a boss 3113 is provided on the side wall of the latch 311 adjacent to the first insertion end 3111. The boss 3113 is used to abut the periphery of the first mounting hole 111. In this way, after the boss 3113 contacts the periphery of the first mounting hole 111, it can effectively prevent the latch 311 from moving in the axial direction (i.e., the length direction of the latch 311), ensuring that the latch 311 remains in a fixed position after installation and will not loosen due to vibration or other external forces. The boss 3113 provides a clear positioning reference, allowing the latch 311 to be quickly and accurately aligned during installation, simplifying the assembly process and improving production efficiency. The boss 3113 increases the contact area between the latch 311 and the first screw joint portion 11, helping to distribute the load and improve the stability and load-bearing capacity of the entire fastener 10 structure.

[0067] Reference Figure 2 In one embodiment, multiple first mounting holes 111 and multiple second mounting holes 213 are provided. The multiple first mounting holes 111 and multiple second mounting holes 213 are provided in a one-to-one correspondence and are spaced apart along the circumference of the first threaded rod 12. Thus, when only one latch 311 is provided, the latch 311 can be selectively inserted into one of the multiple first mounting holes 111, and the second insertion end 3112 of the latch 311 can be inserted into the corresponding second mounting hole 213. This allows the operator to select the most appropriate hole position for installing the latch 311 based on specific site needs or the convenience of the assembly location, eliminating the need for precise alignment of a single hole position, thereby simplifying the assembly process. The availability of multiple first mounting holes 111 and multiple second mounting holes 213 simplifies the assembly of the latch 311 in environments with limited space or poor visibility. When multiple latches 311 are provided, each latch 311 is inserted into the corresponding first mounting hole 111 and second mounting hole 213. Thus, the multiple latches 311 spaced circumferentially provide more comprehensive anti-rotation protection, ensuring that relative rotation between the first screw joint portion 11 and the second screw joint portion 21 does not occur, maintaining tightness even under complex or dynamic operating conditions. The even distribution of the multiple latches 311 helps apply a consistent preload to all parts of the fastener 10, avoiding structural deformation or damage caused by excessive or insufficient local preload. Even if an individual latch 311, first mounting hole 111, or second mounting hole 213 fails, the remaining latches 311 can continue to provide anti-rotation and securement, reducing the impact of single-point failures on the performance of the entire fastener 10.

[0068] Reference Figures 5 to 7The utility model proposes an assembly component 100, which includes a first portion to be fixed 20, a second portion to be fixed 30 and a fastener 10. The first portion to be fixed 20 is provided with a through hole 201 along its thickness direction, the second portion to be fixed 30 is in contact with the first portion to be fixed 20, and the second portion to be fixed 30 is provided with a threaded hole on the side facing the first portion to be fixed 20. The threaded hole includes a first threaded hole section 3011 and a second threaded hole section 3012 which are sequentially connected in a direction away from the first portion to be fixed 20. The diameter of the first threaded hole section 3011 is larger than the diameter of the second threaded hole section 3012, and the thread rotation directions of the first threaded hole section 3011 and the second hole section 133 are opposite. The free end of the first screw rod 12 passes through the through hole 201 in sequence and is threadedly connected to the first threaded hole section 3011, and the threaded section 221 passes through the through hole 13 and is threadedly connected to the second threaded hole section 3012.

[0069] In an embodiment of the present invention, the thread rotation directions of the first threaded hole section 3011 and the second hole section 133 are opposite, and the thread rotation direction of the second external thread is opposite to the thread rotation direction of the first external thread. By connecting the first screw rod 12 to the first threaded hole section 3011, and connecting the screw section 221 to the second threaded hole section 3012, double fastening can be provided at different locations, thereby increasing the fastening strength and stability. In addition, the design of threads with opposite rotation directions allows the assembly component 100 to remain stable and not easily loosened when subjected to vibration or dynamic loads. The first threaded hole section 3011 has a larger diameter, which can disperse the stress generated during the screw connection process, reduce stress concentration, reduce fatigue of the edge material of the first threaded hole, and improve the reliability of the assembly component 100. The first screw rod 12 is connected to the first threaded hole section 3011 with a larger diameter, which can provide a larger contact area, help to transmit a larger preload during fastening, and ensure the firmness of the connection.

[0070] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A fastener, characterized in that: include: The first screw connection member includes a first screw connection portion and a first screw connection rod connected along its length, the first screw connection rod being provided with a first external thread, and the first screw connection member being provided with a through hole, the through hole being provided through the first screw connection portion and the first screw connection rod, the through hole being provided in a stepped manner to form a first step surface facing away from the free end of the first screw connection rod; The second screw connection member includes a second screw joint portion and a connecting rod connected along its length direction. The second screw connection member is rotatably inserted into the insertion hole, and the second screw joint portion is abutted against the first step surface. The connecting rod has a screw connection section that at least partially extends out of the insertion hole. The screw connection section is provided with a second external thread. The thread rotation direction of the second external thread is opposite to that of the first external thread.

2. The fastener according to claim 1, wherein: The through hole includes a first hole section and a second hole section that are connected to each other, and the first step surface is arranged toward the first hole section; The second screw joint portion is installed in the first hole segment, and the outer side wall of the second screw joint portion is spaced apart from the side wall of the first hole segment.

3. The fastener according to claim 2, wherein: Along the length direction of the first screw connection member, the cross section of the first hole section is circular; and / or, Along the length direction of the first screw connection, the cross section of the second screw connection portion is circular; and / or, The connecting rod is installed in the second hole segment, and the outer side wall of the connecting rod and the side wall of the second hole segment are at least partially spaced apart.

4. The fastener according to claim 1, wherein: An operating groove is provided on a side of the second screw joint portion facing away from the connecting rod. The operating groove is used to match a mounting wrench. The operating groove has a plurality of edges, and the plurality of edges are spaced apart along the circumference of the second screw joint portion.

5. The fastener according to any one of claims 1 to 4, characterized in that: The fastener also includes a stop-rotation structure arranged between the first screw joint part and the second screw joint part, the stop-rotation structure includes a stop-rotation part and a mating part that cooperates with the stop-rotation part to prevent rotation, one of the stop-rotation part and the mating part is arranged at the first screw joint part, and the other is arranged at the second screw joint part.

6. The fastener according to claim 5, wherein: The first screw joint portion is provided with a first mounting hole, the first mounting hole extending radially along the first screw rod and communicating with the through hole, the anti-rotation portion includes a latch inserted into the first mounting hole, the latch having a first insertion end and a second insertion end oppositely disposed, the first insertion end being located outside the first mounting hole; The matching portion includes a second mounting hole provided on the second screw joint portion, the second mounting hole is extended along the radial direction of the first screw rod, and the second insertion end is inserted into the second mounting hole.

7. The fastener according to claim 6, wherein: The first mounting hole passes through the first screw joint portion, the second mounting hole passes through the second screw joint portion, and the second insertion end passes through the second mounting hole and extends out of the first mounting hole; and / or, A boss is protruded from the side wall of the latch pin adjacent to the first insertion end, and the boss is used to abut against the periphery of the first mounting hole.

8. The fastener according to claim 7, wherein: The second insertion end is bent in a direction away from the side wall of the latch; and / or A groove is provided on a side of the second screw joint portion facing away from the connecting rod, and the groove is connected to the second mounting hole.

9. The fastener according to claim 6, wherein: A plurality of the first mounting holes and a plurality of the second mounting holes are provided, and the plurality of the first mounting holes and the plurality of the second mounting holes are provided in a one-to-one correspondence and are spaced apart along the circumference of the first screw rod.

10. An assembly component, characterized in that: include: The first portion to be fixed is provided with a through hole along the thickness direction thereof; a second portion to be fixed, abutting against the first portion to be fixed, a first threaded hole being provided on a side of the second portion to be fixed facing the first portion to be fixed, the first threaded hole comprising a first threaded hole section and a second threaded hole section sequentially connected and arranged in a direction away from the first portion to be fixed, the diameter of the first threaded hole section being larger than the diameter of the second threaded hole section, and the threads of the first threaded hole section and the second threaded hole section being in opposite directions; According to the fastener according to any one of claims 1 to 9, the free end of the first threaded rod passes through the through hole in sequence and is threadedly connected to the first threaded hole segment, and the threaded segment passes through the through hole and is threadedly connected to the second threaded hole segment.

Images