Fastener, fastening assembly and combined die

Abstract

The utility model discloses a fastener, a fastening assembly and a combined die. The fastener comprises a first wheel flange and a rod part, the first wheel flange is provided with an inclined groove, a groove and a first face facing downwards, and groove openings of the inclined groove and the groove are located in the first face; the depth of the inclined groove is gradually increased in the direction close to the groove, the inclined groove is communicated with the groove, and the rod part protrudes out of the first face downwards and is surrounded by the groove. Due to the arrangement of the inclined groove, when the fastener is combined with the nut, the material of the nut can conveniently flow to the groove; and on the other hand, after the fastener is combined with the nut, the chute and the groove are filled with materials of the nut, no gap exists between the fastener and the nut, the chute and the groove are matched with the nut to form a dual-sealing effect, and the sealing performance is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of mechanical parts, in particular to a fastener, a fastening assembly and a combined die. Background Technique

[0002] Fasteners are a type of mechanical parts used for fastening connections and are extremely widely applied. On various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters and supplies, etc., various fasteners can be seen.

[0003] Riveting fasteners utilize Hooke's law principle. After clamping two joining parts with special equipment, the metal of the sleeved ring is extruded and filled into the grooves of the stud with multiple annular grooves, so as to tightly combine the ring and the stud. Each riveting fastener has the same fastening force and the characteristic of never loosening after assembly. Riveting fasteners can be used for general parts that need to be bolted or riveted. Due to the high fastening force, never-loosening and high shear resistance performance generated by riveting fasteners, they are also often used to replace welding.

[0004] Among the common bolts on the current market, there is a chamfer between the rim and the rod part. During the combination with the nut, the chamfer under the bolt head will interfere with the nut, resulting in the risk of insufficient pressing during combination, and further leading to the problem of poor sealing performance. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technique, and provide a fastener, a fastening assembly and a combined die.

[0006] To achieve the above purpose, the utility model and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0007] Solution 1, a fastener adapted to be combined with a nut, comprising

[0008] A first rim, which is provided with an inclined groove, a groove and a downward first surface, and the openings of the inclined groove and the groove are both located on the first surface; the inclined groove gradually increases in depth in the direction close to the groove and communicates with the groove, so that the material of the nut is introduced into the groove;

[0009] A rod part, which protrudes downward from the first surface and is surrounded by the groove.

[0010] Solution 2, based on Solution 1, the inclined groove extends from the edge of the first rim to communicate with the groove.

[0011] Solution 3, based on Solution 1, both the inclined groove and the groove are annular.

[0012] Solution Four, based on Solution One, the rod portion is provided with a thread and a first serration, and the first serration is adapted to allow the material of the nut to flow in.

[0013] Solution Five, based on Solution Four, the rod portion is further provided with a first groove, a snap ring and a second groove; the first serration, the first groove, the snap ring, the second groove and the thread are arranged in sequence in a direction gradually away from the first surface, the outer diameter of the first serration and the outer diameter of the snap ring are both larger than the inner diameters of the first groove and the second groove, and the first groove and the second groove are adapted to allow the material of the nut to flow in.

[0014] Solution Six, a fastening assembly includes a nut and a fastener as described in any one of Solutions One to Five, and the nut and the fastener are adapted to be combined so that the material of the nut flows along the inclined groove into the groove.

[0015] Solution Seven, based on Solution Six, the nut includes a second rim and a sleeve, the sleeve is fixedly connected to the second rim and is adapted to be sleeved on the rod portion, and when the nut and the fastener are combined, the material of the sleeve flows along the inclined groove into the groove.

[0016] Solution Eight, based on Solution Seven, the nut further includes a reinforcing rib, the reinforcing rib connects the second rim and the sleeve, and the outer wall of the sleeve is further provided with a second serration.

[0017] Solution Nine, based on Solutions Six to Eight, the fastener is the fastener as described in Solution Five, the nut is provided with a first hole and a second hole, the inner diameter of the second hole is larger than the inner diameter of the first hole, the inner diameter of the first hole is smaller than the outer diameter of the first serration and is greater than or equal to the outer diameter of the snap ring, and when the nut and the fastener are combined, it is also adapted to allow the material of the nut to enter the first groove and the second groove and wrap the snap ring.

[0018] Solution Ten, a combination mold is used to combine a fastening assembly as described in Solution Nine, and it includes an upper mold, a lower mold and a bushing. The bushing is sleeved on the outside of the nut to restrict the outward flow of the nut. The lower mold is provided with an inner hole and a protrusion. The inner hole is adapted to allow the rod portion to extend into it; the protrusion is adapted to abut against the second hole to support the nut, and the outer diameter dimension of the protrusion is adapted to the inner diameter dimension of the second hole;

[0019] The upper mold is adapted to press against the first rim to make the fastener move downward so that the nut and the fastener are combined.

[0020] From the above description of the present invention and its preferred embodiments, it can be seen that, compared with the prior art, the technical solutions and their preferred embodiments of the present invention have the following beneficial effects due to the following technical means:

[0021] 1. In Solution 1 and its preferred embodiments, a fastener includes a first flange and a rod portion.

[0022] The first flange is provided with an inclined groove, a groove, and a downward-facing first surface. The openings of the inclined groove and the groove are both located on the first surface. The depth of the inclined groove gradually increases in the direction close to the groove and communicates with the groove. The rod portion protrudes downward from the first surface and is surrounded by the groove. By providing the inclined groove, when combining the fastener with the nut, it is convenient for the material of the nut to flow into the groove. On the other hand, after the fastener and the nut are combined, the inclined groove and the groove are filled with the material of the nut, there is no gap between the fastener and the nut, and the inclined groove, the groove, and the nut cooperate to form a double sealing effect, strengthening the sealing performance.

[0023] 2. In Solution 2 and its preferred embodiments, the inclined groove extends from the edge of the first flange to communicate with the groove, which is convenient for processing and has more material diversion and higher efficiency.

[0024] 3. In Solution 3 and its preferred embodiments, both the inclined groove and the groove are annular, resulting in a larger sealing area and better sealing effect.

[0025] 4. In Solution 4 and its preferred embodiments, the rod portion is provided with threads for screwing with an external object. The first serrated teeth are adapted to allow the material of the nut to flow in, and the first serrated teeth also prevent the nut and the fastener from rotating relative to each other, ensuring stability.

[0026] 5. In Solution 5 and its preferred embodiments, the rod portion further includes first serrated teeth, a first groove, a snap ring, and a second groove. The first serrated teeth, the first groove, the snap ring, the second groove, and the threads are arranged in sequence in the direction gradually away from the first surface. The outer diameters of the first serrated teeth and the snap ring are both larger than the inner diameters of the first groove and the second groove. The first serrated teeth, the first groove, and the second groove are adapted to allow the material of the nut to flow in. After combination, the groove is filled, the first groove and the second groove are partially filled. When pulling the fastener up and down, since the snap ring, the first serrated teeth, and the threads are limited by the material of the nut entering the groove, the first groove, and the second groove, the fastener cannot be disengaged from the nut relative to the nut. This structure has a triple anti-pull-off structure, strengthening the anti-pull-off performance without the need for secondary pressing to enhance the anti-pull-off performance. 6. In Solution 6 and its preferred embodiments, a fastening assembly includes a nut and the above-mentioned fastener. The nut and the fastener are adapted to be combined so that the material of the nut flows into the groove along the inclined groove, and it has the beneficial effects brought by the above-mentioned fastener.

[0027] 7. In Solution 7 and its preferred embodiments, the nut includes a second flange and a sleeve. The sleeve is fixedly connected to the second flange and is adapted to be sleeved on the rod portion. When the nut and the fastener are combined, the material of the sleeve flows into the groove along the inclined groove.

[0028] 8. In Solution 8 and its preferred embodiments, the nut further includes reinforcing ribs connecting the second flange and the sleeve to ensure strength.

[0029] 9. In Solution Nine and its preferred embodiments, the fastener is the fastener of Solution Five. The nut is provided with a first hole and a second hole. The inner diameter of the second hole is larger than that of the first hole. The second hole is for the protrusion of the lower die to extend into, and the nut is supported by the protrusion of the lower die, so that the protrusion of the lower die and the upper die are used to compound and extrude the nut, and the material of the nut flows into the corresponding position.

[0030] The inner diameter of the first hole is smaller than the outer diameter of the first serrated teeth, so as to have an interference fit with the first serrated teeth. Due to the interference fit, under the action of the upper die, the nut will deform, and the material of the nut will flow into the corresponding position.

[0031] The inner diameter of the first hole is greater than or equal to the outer diameter of the snap ring, so as to facilitate the alignment of the position of the first hole with the position where the snap ring is located, so that the material at the first hole flows to the first groove and the second groove, and the material of the nut enters the first groove and the second groove and wraps the snap ring.

[0032] 10. In Solution Ten and its preferred embodiments, a combined die is used to combine a fastening assembly. It includes an upper die, a lower die and a bushing. The bushing is sleeved outside the nut to limit the outward flow of the nut. The lower die is provided with an inner hole and a protrusion. The inner hole is suitable for the rod part to extend into to achieve positioning and guiding during downward pressing; the protrusion is suitable for abutting against the second hole to support the nut. The outer diameter dimension of the protrusion is adapted to the inner diameter dimension of the second hole to prevent the material of the nut from flowing to the gap when the gap between the second hole and the protrusion is too large. The upper die is suitable for pressing against the first flange to make the fastener move downward, providing a pressure to combine the nut and the fastener. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0034] Figure 1 It is a three-dimensional view of the fastener in Embodiment 1

[0035] Figure 2 It is a cross-sectional view of the fastener in Embodiment 1;

[0036] Figure 3 For Figure 2 The enlarged view of the marked position;

[0037] Figure 4 It is a top view of the fastener in Embodiment 1;

[0038] Figure 5 It is a three-dimensional view of the nut in Embodiment 1;

[0039] Figure 6 Cross-sectional view of the nut in Embodiment 1

[0040] Figure 7 Stereogram of the combined die in Embodiment 1

[0041] Figure 8 Cross-sectional view of the combined die in Embodiment 1

[0042] Description of main reference numerals:

[0043] Fastener 1, first flange 11; inclined groove 111, groove 112; first surface 113; rod portion 12; first serration 121, first groove 122, snap ring 123, second groove 124; thread 125; nut 2; second flange 21, sleeve 22; second serration 221; reinforcing rib 23; first hole 24; second hole 25; lower die 3; inner hole 31; protrusion 32; bushing 4 Detailed implementation manners

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0045] In the claims, the description and the above-mentioned accompanying drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are used to distinguish different objects rather than to describe a specific order

[0046] In the claims, the description and the above-mentioned accompanying drawings of the present invention, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship are based on the orientation and position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the specific protection scope of the present invention

[0047] In the claims, the description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", it should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is to say, it includes non-detachable fixed connection, detachable fixed connection, being integrally formed and being fixedly connected through other devices or elements.

[0048] In the claims, the description and the above-mentioned drawings of the present utility model, when using the terms "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0049] A fastening assembly includes a fastener 1 and a nut 2.

[0050] The fastener 1 includes a first flange 11 and a rod portion 12.

[0051] Reference Figure 1 - Figure 2 , the first flange 11 protrudes radially outward along the rod portion 12. The first flange 11 is the bolt head. In this embodiment, it is a cylinder with a diameter of 8.50 mm - 9.00 mm and a thickness of 1.70 - 2.30 mm. The shape of the first flange 11 is not limited and can be circular, quadrilateral, hexagonal, polygonal, etc.

[0052] Reference Figure 3 , Figure 4 , the first flange 11 is provided with an inclined groove 111, a groove 112 and a downward first surface 113. The openings of the inclined groove 111 and the groove 112 are both located on the first surface 113 and are both annular; the depth of the inclined groove 111 gradually increases in the direction close to the groove 112. The inclined groove 111 extends from the edge of the first flange 11 to communicate with the groove 112, and the angle of the inclined groove 111 can be set to 0.25 - 0.75°. The depth of the groove 112 can be approximately 0.2 - 0.3 mm.

[0053] Reference Figure 1 , Figure 2, the rod portion 12 protrudes downward from the first surface 113 and is surrounded by the groove 112. The rod portion 12 includes a first serrated tooth 121, a first groove 122, a snap ring 123, a second groove 124, and a thread 125; the first serrated tooth 121, the first groove 122, the snap ring 123, the second groove 124, and the thread 125 are arranged in sequence in a direction gradually away from the first surface 113, and the outer diameters of both the first serrated tooth 121 and the snap ring 123 are greater than the inner diameters of the first groove 122 and the second groove 124. Specifically, the first serrated tooth 121 is 2.7 - 3 mm long and has an outer diameter of 6.3 - 6.6 mm. The first groove 122 is 0.9 - 1.1 mm long and has an inner diameter of 5.2 - 5.4 mm. The snap ring 123 is 0.4 - 0.6 mm long and has an outer diameter of 5.9 - 6.1 mm. The size of the second groove 124 can be the same as that of the first groove 122, and the thread 125 is 20 - 28 mm long and has a specification of M6X1.0.

[0054] Reference Figure 5 , Figure 6 , the nut 2 and the fastener 1 are adapted to be combined so that the material of the nut 2 flows along the inclined groove 111 into the groove 112. The nut 2 includes a second rim 21, a sleeve 22, and a reinforcing rib 23. The sleeve 22 is fixedly connected to the second rim 21 and is adapted to be sleeved on the rod portion 12. When the nut 2 and the fastener 1 are combined, the material of the sleeve 22 flows along the inclined groove 111 into the groove 112, and the material of the sleeve 22 enters the first groove 122 and the second groove 124 and wraps the snap ring 123. The diameter of the sleeve 22 is 8.8 - 8.9 mm, and the outer wall of the sleeve 22 is also provided with a second serrated tooth 221 that is 6.4 - 6.6 long. The second serrated tooth 221 is used to prevent the fastening assembly from rotating relative to the plate when the fastening assembly is fixed to the plate.

[0055] The second rim 21 is 1.3 - 1.6 mm thick and has a diameter of 12.8 - 13.2 mm. The reinforcing rib 23 connects the second rim 21 and the sleeve 22. Specifically, the reinforcing rib 23 is located between the second serrated tooth 221 and the second rim 21, and the number of the reinforcing ribs 23 is 8 and they are evenly closed. The reinforcing rib 23 is 1.3 - 1.6 mm long, 1.3 - 1.5 mm wide, and 0.8 - 1.12 mm high.

[0056] The nut 2 is provided with a first hole 24 and a second hole 25 that are arranged in sequence from top to bottom and communicate with each other. The inner diameter of the first hole 24 is smaller than the outer diameter of the first serrated tooth 121 and is greater than or equal to the outer diameter of the snap ring 123. The first hole 24 is 4.9 - 5.1 mm long and has an inner diameter of 6 - 6.1 mm. The inner diameter of the second hole 25 is greater than the inner diameter of the first hole 24. The second hole 25 is 6.8 - 7.2 mm long and has an inner diameter of 7.3 - 7.5 mm.

[0057] The combination die for combining the fastener 1 and the nut 2 is as follows:

[0058] Reference Figure 7 ,Figure 8 A combined die includes an upper die, a lower die 3 and a bushing 4. The lower die 3 is provided with an inner hole 31 and a protrusion 32. The inner hole 31 is adapted for the rod portion 12 to extend into, and the inner diameter of the inner hole 31 is 6 - 6.2 mm. The protrusion 32 is adapted to abut against the second hole 25 to support the nut 2, and its diameter size is adapted to the inner diameter size of the second hole 25. The protrusion 32 is 8 - 8.2 mm high and has a diameter of 7.2 - 7.3 mm.

[0059] The bushing 4 is sleeved on the outer side of the nut 2 to limit the outward flow at the sleeve 22 of the nut 2.

[0060] The upper die is adapted to press against the first flange 11 to cause the fastener 1 to move downward, so that the nut 2 is combined with the fastener 1.

[0061] Combination process:

[0062] The first serrated teeth 121 of the fastener 1 abut against the upper chamfer of the first hole 24 of the nut 2, and the threaded portion 125 partially extends into the inner hole 31 to achieve positioning. The protrusion 32 of the lower die 3 extends into the second hole 25 to abut against the lower chamfer of the first hole 24 (which is also the upper chamfer of the second hole 25) and supports the nut 2. The bushing 4 limits the nut 2 to ensure that during the combination process, the material of the nut 2 will not extend radially outward.

[0063] When the upper die moves downward and applies force to the first flange 11, the fastener 1 moves downward. The first serrated teeth 121 of the fastener 1 are in interference fit with the first hole 24 of the nut 2. Under the combined extrusion of the protrusion 32 of the lower die 3 and with the limitation of the bushing 4, the material will enter the first groove 122 and the second groove 124, and then enter the groove 112 below the first flange 11 along the inclined groove 111 until the first flange 11 fits against the top of the sleeve 22, completing the combination.

[0064] After combination, the groove 112 is filled, and the first groove 122 and the second groove 124 are partially filled. When the fastener 1 is pulled up and down, since the snap ring 123, the first serrated teeth 121, and the threaded portion 125 are limited by the material that enters the groove 112, the first groove 122, and the second groove 124 of the nut 2, the fastener 1 cannot be separated from the nut 2. This structure has a triple anti-pull-off structure, and the anti-pull-off performance is enhanced, eliminating the need for secondary pressing to enhance the anti-pull-off performance.

[0065] The above description of the dimensions is only for easier understanding and does not limit the dimensions of the fastening assembly and the die shown in this embodiment.

[0066] Compared with the prior art, this embodiment has the following beneficial effects:

[0067] In an exemplary embodiment, a fastener 1 includes a first flange 11 and a rod portion 12.

[0068] The first flange 11 is provided with an inclined groove 111, a groove 112 and a downward-facing first surface 113. The openings of the inclined groove 111 and the groove 112 are both located on the first surface 113. The depth of the inclined groove 111 gradually increases in the direction close to the groove 112 and communicates with the groove 112. The rod portion 12 protrudes downward from the first surface 113 and is surrounded by the groove 112. By providing the inclined groove 111, when the fastener 1 is combined with the nut 2, it is convenient for the material of the nut 2 to flow into the groove 112. On the other hand, after the fastener 1 and the nut 2 are combined, the inclined groove 111 and the groove 112 are filled with the material of the nut 2, there is no gap between the fastener 1 and the nut 2, and the inclined groove 111 and the groove 112 cooperate with the nut 2 to form a double sealing effect, and the sealing performance is enhanced.

[0069] In an exemplary embodiment, the inclined groove 111 extends from the edge of the first flange 11 to communicate with the groove 112, which is convenient for processing and has more material guiding, and the effect is higher.

[0070] In an exemplary embodiment, both the inclined groove 111 and the groove 112 are annular, so that the sealing area is larger and the sealing effect is better.

[0071] In an exemplary embodiment, the rod portion 12 is provided with a thread 125 for screwing with an external object. The first serrated teeth 121 are adapted to allow the material of the nut 2 to flow in, and the first serrated teeth 121 also prevent the nut 2 from rotating relative to the fastener 1, ensuring stability.

[0072] In an exemplary embodiment, the rod portion 12 further includes first serrated teeth 121, a first groove 122, a snap ring 123 and a second groove 124. The first serrated teeth 121, the first groove 122, the snap ring 123, the second groove 124 and the thread 125 are arranged in sequence in the direction gradually away from the first surface 113. The outer diameters of the first serrated teeth 121 and the snap ring 123 are both larger than the inner diameters of the first groove 122 and the second groove 124. The first serrated teeth 121, the first groove 122 and the second groove 124 are adapted to allow the material of the nut 2 to flow in. After combination, the groove 112 is filled, and the first groove 122 and the second groove 124 are partially filled. When the fastener 1 is pulled up and down, since the snap ring 123, the first serrated teeth 121 and the thread 125 are limited by the material of the nut 2 entering the groove 112, the first groove 122 and the second groove 124, the fastener 1 cannot be separated relative to the nut 2. This structure has a triple anti-pull-off structure, and the anti-pull-off performance is enhanced, and there is no need for secondary pressing to enhance the anti-pull-off performance.

[0073] In an exemplary embodiment, a fastening assembly includes a nut 2 and the above-mentioned fastener 1. The nut 2 and the fastener 1 are adapted to be combined so that the material of the nut 2 flows along the inclined groove 111 into the groove 112, and it has the beneficial effects brought by the above-mentioned fastener 1.

[0074] In an exemplary embodiment, the nut 2 includes a second rim 21 and a sleeve 22. The sleeve 22 is fixedly connected to the second rim 21 and is adapted to be sleeved on the rod portion 12. When the nut 2 and the fastener 1 are combined, the material of the sleeve 22 flows into the groove 112 along the inclined groove 111.

[0075] In an exemplary embodiment, the nut 2 further includes a reinforcing rib 23. The reinforcing rib 23 connects the second rim 21 and the sleeve 22 to ensure strength.

[0076] In an exemplary embodiment, the fastener 1 is the fastener 1 of Solution Five. The nut 2 is provided with a first hole 24 and a second hole 25. The inner diameter of the second hole 25 is larger than the inner diameter of the first hole 24. The second hole 25 is used for the protrusion 32 of the lower die 3 to extend into, and the nut 2 is supported by the protrusion 32 of the lower die 3, so that the protrusion 32 of the lower die 3 and the upper die are compounded to extrude the nut 2, and the material of the nut 2 flows into the corresponding position;

[0077] The inner diameter of the first hole 24 is smaller than the outer diameter of the first serrated tooth 121 to have an interference fit with the first serrated tooth 121. Due to the interference fit, under the action of the upper die, the nut 2 will deform, so that the material of the nut 2 flows into the corresponding position.

[0078] The inner diameter of the first hole 24 is greater than or equal to the outer diameter of the snap ring 123, so as to facilitate the alignment of the position of the first hole 24 with the position where the snap ring 123 is located, so that the material at the first hole 24 flows to the first groove 122 and the second groove 124, and the material of the nut 2 enters the first groove 122 and the second groove 124 and wraps the snap ring 123.

[0079] In an exemplary embodiment, a combined die is used to combine a fastening assembly. It includes an upper die, a lower die 3 and a bushing 4. The bushing 4 is sleeved on the outside of the nut 2 to limit the outward flow of the nut 2. The lower die 3 is provided with an inner hole 31 and a protrusion 32. The inner hole 31 is adapted for the rod portion 12 to extend into for positioning and guiding during downward pressing; the protrusion 32 is adapted to abut against the second hole 25 to support the nut 2. The outer diameter dimension of the protrusion 32 is adapted to the inner diameter dimension of the second hole 25 to prevent the material of the nut 2 from flowing to the gap when the gap between the second hole 25 and the protrusion 32 is too large. The upper die is adapted to press against the first rim 11 to make the fastener 1 move downward, providing a pressure to combine the nut 2 and the fastener 1.

[0080] The above description of the specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the inspiration of the present invention or the above embodiments, those of ordinary skill in the art, combined with common general knowledge, ordinary technical knowledge in the art and / or the prior art, through logical analysis, reasoning or limited experiments, can obtain modifications, equivalent replacements or other improvements to the embodiments of the present invention or some of its technical features, which should all be included in the protection scope of the present invention.

Claims

1. A fastener (1), suitable for being combined with a nut (2), characterized in that: include a first wheel rim (11), which is provided with an inclined groove (111), a groove (112) and a first surface (113) facing downwards, wherein the notches of the inclined groove (111) and the groove (112) are both located on the first surface (113); the inclined groove (111) gradually increases in depth in a direction approaching the groove (112) and is connected to the groove (112) so that the material of the nut (2) can be introduced into the groove (112); The rod portion (12) protrudes downward from the first surface (113) and is surrounded by the groove (112).

2. A fastener (1) according to claim 1, characterized in that: The inclined groove (111) extends from the edge of the first wheel rim (11) to communicate with the groove (112).

3. A fastener (1) according to claim 1, characterized in that: The inclined groove (111) and the groove (112) are both annular.

4. A fastener (1) according to claim 1, characterized in that: The rod portion (12) is provided with a thread (125) and a first tooth (121), and the first tooth (121) is suitable for allowing the material of the nut (2) to flow in.

5. A fastener (1) according to claim 4, characterized in that: The rod portion (12) is further provided with a first groove (122), a retaining ring (123) and a second groove (124); the first flower tooth (121), the first groove (122), the retaining ring (123), the second groove (124) and the thread (125) are arranged in sequence in a direction gradually away from the first surface (113); the outer diameter of the first flower tooth (121) and the outer diameter of the retaining ring (123) are both larger than the inner diameter of the first groove (122) and the second groove (124); the first groove (122) and the second groove (124) are suitable for allowing material of the nut (2) to flow in.

6. A fastening assembly, characterized in that: It comprises a nut (2) and a fastener (1) as claimed in any one of claims 1 to 5, wherein the nut (2) and the fastener (1) are suitable for being combined so that the material of the nut (2) flows into the groove (112) along the inclined groove (111).

7. A fastening assembly according to claim 6, characterized in that: The nut (2) comprises a second rim (21) and a sleeve (22); the sleeve (22) is fixedly connected to the second rim (21) and is suitable for being sleeved on the rod (12); when the nut (2) and the fastener (1) are combined, the material of the sleeve (22) flows into the groove (112) along the inclined groove (111).

8. A fastening assembly according to claim 7, characterized in that: The nut (2) further comprises a reinforcing rib (23), wherein the reinforcing rib (23) connects the second wheel rim (21) and the sleeve (22), and the outer wall of the sleeve (22) is further provided with a second tooth (221).

9. A fastening assembly according to any one of claims 6 to 8, characterized in that: The fastener (1) is the fastener (1) as claimed in claim 5, the nut (2) is provided with a first hole (24) and a second hole (25), the inner diameter of the second hole (25) is larger than the inner diameter of the first hole (24), the inner diameter of the first hole (24) is smaller than the outer diameter of the first tooth (121), and is larger than or equal to the outer diameter of the retaining ring (123), and when the nut (2) and the fastener (1) are combined, the material of the nut (2) is also suitable for entering the first groove (122) and the second groove (124) and wrapping the retaining ring (123).

10. A combined mold, characterized in that: A fastening assembly for assembling as claimed in claim 9, comprising an upper die, a lower die (3) and a bushing (4), wherein the bushing (4) is sleeved on the outer side of the nut (2) to limit the outward flow of the nut (2), and the lower die (3) is provided with an inner hole (31) and a protrusion (32), wherein the inner hole (31) is suitable for the rod (12) to extend therein; the protrusion (32) is suitable for abutting against the second hole (25) to support the nut (2), and the outer diameter of the protrusion (32) is adapted to match the inner diameter of the second hole (25); The upper die is suitable for pressing against the first wheel rim (11) to move the fastener (1) downward, thereby combining the nut (2) with the fastener (1).

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