Fastener with self-locking threads

Abstract

The fastener with the self-locking threads comprises an upper side screw head and a fastening screw rod, the upper side screw head is installed and connected to the upper end of the fastening screw rod, a middle positioning screw sleeve is arranged on the inner side of the upper side screw head, a self-locking abutting screw rod is arranged on the inner side of the middle positioning screw sleeve, and the self-locking abutting screw rod is connected with the middle positioning screw sleeve. A threaded self-locking inserting rod is arranged on the peripheral side of the lower end of the self-locking abutting screw and located on the fastening screw, when the self-locking abutting screw rotates and moves downwards, the self-locking abutting screw abuts against the threaded self-locking inserting rod to move outwards, then the threaded self-locking inserting rod can be inserted into an external fastening object, and therefore the purpose of threaded self-locking is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a fastener with self-locking threads. Background Art

[0002] Fasteners are a type of mechanical parts used for fastening connections and are extremely widely used. Fasteners are used in a wide range of industries, including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, molds, hydraulics, and so on.

[0003] The existing Chinese patent with the announcement number CN220791666U disclosed a fastener on April 16, 2024, which is used to seal and connect plates, including: a body, which extends axially and has a first end and a second end opposite to each other, the first end of the body has an outer edge portion extending radially outward, and one end face of the outer edge portion has a plurality of annular protrusions, and the inner diameter of each protrusion increases successively from the axis of the body to the outer edge of the body; the axial cross-section of each protrusion is spike-shaped, and its tip is axially away from the outer edge portion so as to be embedded in the plate from the plate toward the end face of the outer edge portion.

[0004] However, when the above-mentioned fastener is installed, the fastener increases friction with the fastener through the peripheral thread, thereby effectively fixing the connection. However, the fastener is only fixed by the thread and cannot be effectively self-locked as a whole, so it is not very firm and stable when used. Utility Model Content

[0005] The purpose of the present utility model is to provide a fastener with self-locking threads to solve the problem proposed in the above-mentioned background art that when the above-mentioned fastener is installed, the fastener increases friction with the fastener through the circumferential threads, thereby effectively fixing the connection, while the fastener is only fixed by the threads and cannot be effectively self-locked as a whole, so it is not very firm and stable when used.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a fastener with a self-locking thread, comprising an upper screw head and a fastening screw, wherein the upper screw head is mounted and connected to the upper end of the fastening screw, an intermediate positioning screw sleeve is provided on the inner side of the upper screw head, a self-locking interference screw is provided on the inner side of the intermediate positioning screw sleeve, and a threaded self-locking insert is provided on the fastening screw at the circumference of the lower end of the self-locking interference screw;

[0007] The threaded self-locking plug rod includes an anti-slip convex end plate, a connecting plug rod, an interference bevel and a self-locking cone head. The outer end of the connecting plug rod is provided with a self-locking cone head, the upper part of the inner end of the connecting plug rod is provided with a interference bevel, and the lower part of the inner end of the connecting plug rod is provided with an anti-slip convex end plate. The connecting plug rod and the self-locking cone head are sleeved on the fastening screw.

[0008] Among them, the fastening screw includes a hollow rod body, a movable sleeve cavity, an anti-slip end plate groove and a metal thread. The movable sleeve cavity is provided inside the hollow rod body, and the inner side of the movable sleeve cavity is provided with an anti-slip end plate groove on the inner wall of the hollow rod body. The circumferential side of the hollow rod body is provided with a metal thread, and the upper end of the hollow rod body is fixedly connected to the upper screw head.

[0009] Among them, the self-locking interference screw includes an interference round head, a long screw and an upper nut. A long screw is provided in the middle of the lower end of the upper nut, and a interference round head is provided at the lower end of the long screw. The long screw thread is rotatably connected to the middle positioning screw sleeve.

[0010] Wherein, the intermediate positioning screw sleeve includes an internal thread groove, a screw sleeve shell and an internal sleeve cavity. The internal sleeve cavity is provided above the interior of the screw sleeve shell, and the internal thread groove is provided below the interior of the screw sleeve shell. The screw sleeve shell is installed and connected to the upper screw head.

[0011] Wherein, the middle positioning screw sleeve and the upper screw head are connected by sleeve connection, and the top ends of the middle positioning screw sleeve and the upper screw head are aligned.

[0012] Wherein, the threaded self-locking rod is sleeved on the inner side of the fastening screw.

[0013] Wherein, the self-locking interference screw is located in the middle of the middle positioning screw sleeve, and the two ends are symmetrical.

[0014] In summary, due to the adoption of the above technology, the beneficial effects of the utility model are:

[0015] 1. In the present invention, when the self-locking interference screw is rotated and moved downward, the self-locking interference screw interferes with the threaded self-locking plug rod to move outward, and then the threaded self-locking plug rod can be inserted into an external fastener, thereby achieving the purpose of thread self-locking.

[0016] 2. In the present invention, an intermediate positioning screw sleeve structure is provided so that the self-locking interference screw can be positioned, rotated and lifted on the intermediate positioning screw sleeve. An internal sleeve cavity is provided above the inner part of the screw sleeve shell of the intermediate positioning screw sleeve, and an internal thread groove is provided below the inner part of the screw sleeve shell, so that the self-locking interference screw can be positioned and moved on the screw sleeve shell. The screw sleeve shell is sleeved and installed on the upper screw head, so that it can be stably placed and used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a fastener with self-locking threads according to the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of a fastener with self-locking threads according to the present invention;

[0019] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of area A of a fastener with self-locking threads of the utility model;

[0020] Figure 4 This is a schematic diagram of the self-locking interference screw structure of a fastener with self-locking threads according to the present invention;

[0021] Figure 5 This is a schematic structural diagram of an intermediate positioning screw sleeve of a fastener with self-locking threads according to the present invention;

[0022] Figure 6 The utility model is a schematic diagram of a threaded self-locking plug rod structure of a fastener with self-locking threads.

[0023] In the figure: 1. Self-locking interference screw; 11. Interference round head; 12. Long screw; 13. Upper nut; 2. Upper screw head; 3. Middle positioning screw sleeve; 31. Internal thread groove; 32. Screw sleeve shell; 33. Internal sleeve cavity; 4. Fastening screw; 41. Hollow rod body; 42. Moving sleeve cavity; 43. Anti-slip end plate groove; 44. Metal thread; 5. Threaded self-locking plug rod; 51. Anti-slip convex end plate; 52. Connecting plug rod; 53. Interference inclined surface; 54. Self-locking cone head. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0025] Example 1

[0026] Reference Figure 1 、 Figure 2 、 Figure 4 and Figure 6The cam 2 is screwed to the screw 4 and the cam 2 is screwed to the screw 4, so that the cam 2 is screwed to the screw 4 and the cam 2 is screwed to the screw 4. The cam 2 is screwed to the screw 4 and the cam 2 is screwed to the screw 4. The cam 2 is screwed to the screw 4 and the cam 2 is screwed to the screw 4. The cam 2 is screwed to the screw 4 and the cam 2 is screwed to the screw 4. The cam 2 is screwed to the screw 4 and the cam 2 is screwed to the screw 4. The cam 2 is screwed to the screw 4 and the cam 2 is screwed to the screw 4.

[0027] The threaded self-locking plug rod 5 includes an anti-slip convex end plate 51, a connecting plug rod 52, an interference bevel 53 and a self-locking cone head 54. The outer end of the connecting plug rod 52 is fixedly connected to the self-locking cone head 54. The connecting plug rod 52 and the self-locking cone head 54 are sleeved on the fastening screw 4, so that the connecting plug rod 52 and the self-locking cone head 54 can be positioned outward in the fastening screw 4 and then inserted into the external fastener, so that they are effectively positioned. An interference bevel 53 is provided above the inner end of the connecting plug rod 52. When the self-locking interference screw 1 rotates and moves downward, the self-locking interference screw 1 interferes with the interference bevel 53, and then the connecting plug rod 52 can move outward in the interference. An anti-slip convex end plate 51 is fixed below the inner end of the connecting plug rod 52. The connecting plug rod 52 can be effectively prevented from slipping out due to the obstruction of the anti-slip convex end plate 51 on the fastening screw 4.

[0028] In the present invention, the threaded self-locking plug rod 5 is sleeved on the inner side of the fastening screw rod 4, so that it can be moved outwards and inserted for self-locking in the event of interference.

[0029] In the present invention, the self-locking interference screw 1 includes an interference round head 11, a long screw 12 and an upper nut 13. The long screw 12 is fixedly connected to the middle of the lower end of the upper nut 13. The upper nut 13 can be rotated by an external screwdriver. When the upper nut 13 is rotated, the long screw 12 can be driven to rotate. The long screw 12 is threadedly connected to the middle positioning screw sleeve 3, so that the long screw 12 can be rotated and lifted. The lower end of the long screw 12 is fixed with a interference round head 11, and the interference round head 11 can interfere with the threaded self-locking plug 5 and move outward, and then can be effectively self-locked and fixed.

[0030] In the present invention, the self-locking interference screw 1 is located in the middle of the middle positioning screw sleeve 3, and its two ends are symmetrical. The self-locking interference screw 1 can position the thread rotation in the middle positioning screw sleeve 3, so that it can rotate and lift stably.

[0031] Example 2

[0032] Reference Figure 1-Figure 3 , a fastener with a self-locking thread. Compared with the first embodiment, the fastening screw 4 in this embodiment includes a hollow rod body 41, a movable sleeve cavity 42, an anti-slip end plate groove 43 and a metal thread 44. A movable sleeve cavity 42 is opened inside the hollow rod body 41, so that the self-locking interference screw 1 can be positioned and moved for use. The inner side of the movable sleeve cavity 42 is located on the inner wall of the hollow rod body 41 and an anti-slip end plate groove 43 is opened, so that the threaded self-locking plug rod 5 will not fall off during the interference. The circumferential side of the hollow rod body 41 is fixedly connected with a metal thread 44, so that the hollow rod body 41 can be fastened with the external thread through the metal thread 44 on the circumferential side. The upper end of the hollow rod body 41 is fixedly connected to the upper screw head 2, and the upper screw head 2 can drive the hollow rod body 41 to rotate and tighten during rotation.

[0033] Example 3

[0034] Reference Figure 1 、 Figure 2 and Figure 5 , a fastener with a self-locking thread. Compared with the second embodiment, the middle positioning screw sleeve 3 and the upper screw head 2 are connected by a socket connection, and the top ends of the middle positioning screw sleeve 3 and the upper screw head 2 are aligned, so that they can be installed in a corresponding socket connection, and the top ends are aligned, so that no obstruction occurs during use.

[0035] The middle positioning screw sleeve 3 includes an internal thread groove 31, a screw sleeve shell 32 and an internal sleeve cavity 33. The internal sleeve cavity 33 is opened on the upper part of the screw sleeve shell 32, and the internal thread groove 31 is opened on the lower part of the screw sleeve shell 32, so that the self-locking interference screw 1 can be positioned and moved on the screw sleeve shell 32. The screw sleeve shell 32 is installed and connected to the upper screw head 2, so that it can be placed stably for use.

[0036] Working principle: When in use, when the upper screw head 2 is rotated by an external wrench, the upper screw head 2 can drive the fastening screw 4 to rotate, and then it can be rotated to tighten. The inner thread of the middle positioning screw sleeve 3 is rotatably connected with the self-locking interference screw 1, and the self-locking interference screw 1 can position the thread on the middle positioning screw sleeve 3 to rotate and rise and fall. When the self-locking interference screw 1 rotates and moves downward, the self-locking interference screw 1 interferes with the thread self-locking plug 5 to move outward, and then the thread self-locking plug 5 can be inserted into the external fastener, thereby achieving the purpose of thread self-locking.

[0037] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A fastener with a self-locking thread, comprising an upper screw head (2) and a fastening screw rod (4), wherein the upper screw head (2) is mounted and connected to the upper end of the fastening screw rod (4), characterized in that: An intermediate positioning screw sleeve (3) is provided on the inner side of the upper screw head (2), a self-locking abutting screw (1) is provided on the inner side of the intermediate positioning screw sleeve (3), and a threaded self-locking insert rod (5) is provided on the lower end circumference of the self-locking abutting screw (1) and located on the fastening screw (4); The threaded self-locking plug rod (5) comprises an anti-slip convex end plate (51), a connecting plug rod (52), a contact bevel (53) and a self-locking cone head (54); the outer end of the connecting plug rod (52) is provided with a self-locking cone head (54); the upper part of the inner end of the connecting plug rod (52) is provided with a contact bevel (53); the lower part of the inner end of the connecting plug rod (52) is provided with an anti-slip convex end plate (51); the connecting plug rod (52) and the self-locking cone head (54) are sleeved on the fastening screw rod (4).

2. A fastener with self-locking threads according to claim 1, characterized in that: The fastening screw (4) comprises a hollow rod body (41), a movable sleeve cavity (42), an anti-slip end plate groove (43) and a metal thread (44); the movable sleeve cavity (42) is provided inside the hollow rod body (41); the anti-slip end plate groove (43) is provided on the inner wall of the hollow rod body (41) on the inner side of the movable sleeve cavity (42); the metal thread (44) is provided on the circumference of the hollow rod body (41); the upper end of the hollow rod body (41) is fixedly connected to the upper screw head (2).

3. The fastener with self-locking threads according to claim 1, characterized in that: The self-locking interference screw (1) comprises an interference round head (11), a long screw (12) and an upper nut (13); the long screw (12) is arranged in the middle of the lower end of the upper nut (13); the lower end of the long screw (12) is provided with an interference round head (11); the long screw (12) is threadedly connected to the middle positioning screw sleeve (3).

4. A fastener with self-locking threads according to claim 3, characterized in that: The intermediate positioning screw sleeve (3) comprises an internal thread groove (31), a screw sleeve shell (32) and an internal sleeve cavity (33); the internal sleeve cavity (33) is provided above the interior of the screw sleeve shell (32); the internal thread groove (31) is provided below the interior of the screw sleeve shell (32); and the screw sleeve shell (32) is mounted and connected to the upper screw head (2).

5. A fastener with self-locking threads according to claim 4, characterized in that: The middle positioning screw sleeve (3) and the upper screw head (2) are connected by sleeve connection, and the top ends of the middle positioning screw sleeve (3) and the upper screw head (2) are aligned.

6. The fastener with self-locking threads according to claim 1, characterized in that: The threaded self-locking plug rod (5) is sleeved on the inner side of the fastening screw rod (4).

7. The fastener with self-locking threads according to claim 1, characterized in that: The self-locking interference screw (1) is located in the middle of the middle positioning screw sleeve (3) and is symmetrical at both ends.

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