Anti-loose and anti-theft combined nut

Abstract

The invention relates to the technical field of fasteners, in particular to an anti-loose and anti-theft combined nut which comprises a nut body, a connecting piece and a bolt, a flange ring is arranged at the bottom of the nut body, the flange ring downwards fixes the connecting piece, the bolt is arranged below the connecting piece, and the connecting piece is fixedly connected with the bolt. According to the anti-loosening nut, the screw and the connecting position are fixed through the fixing hole and the fixing piece, the fixity of the nut is improved through the anti-loosening teeth, the nut is prevented from loosening under the action of external force, and the use safety of the anti-loosening nut is improved; the nut is not easy to disassemble by disassembling the outer nut, and the anti-theft performance of the nut is improved through the circular inner nut. The inner nut and the outer nut are connected through the groove body, water vapor erosion is prevented, the corrosion resistance of the nut is improved, and the service life of the nut is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of fasteners, and more particularly to a loosening and theft-proof combined nut. Background Art

[0002] Nuts are parts that tightly connect mechanical equipment. They are used in many industries: transportation, foundry, shipbuilding, wind power generation, etc. According to the different needs of different industries, nuts have different types, materials and standards. Among them, nuts are often used on high-speed vehicles such as car tires. Long-term high-speed movement and vibration of the vehicle body will cause the nuts on the tires to loosen and have poor fatigue resistance. Technical problems such as poor performance. This kind of failure in actual engineering can easily cause the machine to fail to work properly or even cause catastrophic accidents.

[0003] An existing combined locking nut, with the announcement number: CN 217735992 U, comprises a nut body, a through threaded hole is processed in the middle of the nut body; a locking pressure ring is threadedly connected to the outer side of the lower side of the nut body; a locking ring is arranged at the upper end of the nut body; a release groove is symmetrically processed on the locking ring; the locking ring has installation notches processed on both sides of the release groove; screws are arranged at the installation notches, and the screws lock the two sides of the release groove. By arranging the locking pressure ring to connect and fix the connection, a certain tightening force can be increased, but the nut cannot be kept locked in the case of high vibration, which is not conducive to long-term use and has low safety.

[0004] An existing combined self-locking nut, with publication number: CN 220118480 U, comprises a convex nut and a concave nut, wherein the convex nut comprises a base section and a truncated cone section, the truncated cone section is formed at the top of the convex nut, and a first tooth socket structure with alternating concave and convex portions is formed on the outer wall of the truncated cone section; wherein a truncated cone groove is formed at the inner bottom of the concave nut, and a second tooth socket structure with alternating concave and convex portions is formed on the inner wall of the truncated cone groove; the truncated cone groove can be inserted into the truncated cone section, so that the first tooth socket structure and the second tooth socket structure are mutually embedded to form a wedge-shaped anti-loosening structure, and there is a gap between the convex nut and the concave nut of this nut, which is easily corroded by liquid during use, resulting in a reduced use time and a shortened service life. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the purpose of the present invention is to provide a combination nut that is anti-loosening and anti-theft, which has better fixation and good anti-theft performance and increases its service life.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a combination nut that prevents loosening and theft, comprising a nut body, a connecting piece, and a bolt. A flange ring is provided at the bottom of the nut body, the flange ring fixes the connecting piece downward, a bolt is provided below the connecting piece, and the bolt is threadedly connected to the nut body upward through a screw rod.

[0007] Preferably, the nut body comprises an inner nut and an outer nut, the outer nut is threadedly connected to the outer side of the inner nut, the inner nut has a circular cross-section, and the outer nut has a hexagonal cross-section.

[0008] Preferably, the inner nut comprises an inner nut body, a fixing hole, a connecting external thread, a flange ring, a fixing piece, anti-loosening teeth, an external nut groove, and an internal thread. A flange ring is provided at the lower part of the inner nut body, a connecting external thread is provided on the outer side of the inner nut body, a fixing hole is provided between the connecting external threads, an external nut groove is provided at the connection between the inner nut body and the flange ring, anti-loosening teeth are provided at the bottom of the flange ring, and an internal thread is provided on the inner side of the inner nut body.

[0009] Preferably, the fixing member comprises a contact plate, an elastic block, a top block and a clamping block. The contact plate is circular and connected upwardly to the elastic block. The top of the elastic block is connected to the top block, and clamping blocks are provided on both sides of the top block.

[0010] Preferably, the bottom surface of the contact plate is rough to increase the friction of the contact surface.

[0011] Preferably, the clamping block is elastic and can be extended left and right.

[0012] Preferably, the connecting external thread and the internal thread are in the same direction.

[0013] Preferably, the nut body further comprises a fixing bolt, the fixing bolt is connected and fixed through a fixing hole, and a fixing pressure ring is provided on the inner side of the fixing bolt.

[0014] Preferably, the bottom of the outer nut is fixed in the outer nut groove.

[0015] Preferably, a connecting internal thread is provided on the inner side of the external nut, and the connecting internal thread matches the connecting external thread.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The anti-loosening and anti-theft combination nut of the present invention provides fixation of the screw rod and the connection part through the provided fixing hole and the fixing piece, and the provided anti-loosening teeth both improve the fixation of the nut, prevent the nut from loosening under the action of external force, and improve its use safety; 2. The anti-loosening and anti-theft combination nut of the present invention can make the nut difficult to disassemble by removing the outer nut, and improve the anti-theft property of the nut by the round inner nut; 3. A groove body is arranged between the inner nut and the outer nut of the anti-loosening and anti-theft combination nut of the present invention to prevent water vapor erosion, thereby improving the corrosion resistance of the nut and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of a loosening and theft-proof combination nut of the present invention; Figure 2 It is a structural schematic diagram of a first embodiment of an anti-loosening and anti-theft combination nut of the present invention; Figure 3 This is a structural schematic diagram of a second embodiment of a combination nut for preventing loosening and theft according to the present invention; Figure 4 It is a detailed view of point A of a combination nut for preventing loosening and theft according to the present invention; Figure 5 It is a top view of a loosening and theft-proof combination nut of the present invention; In the figure: 1-nut body, 11-inner nut, 111-inner nut body, 112-fixing hole, 113-connecting external thread, 114-flange ring, 115-fixing piece, 1151-contact plate, 1152-elastic block, 1153-top block, 1154-block, 116-anti-loosening teeth, 117-external nut groove, 118-inner thread, 12-external nut, 121-inner thread, 13-fixing bolt, 131-fixing pressure ring, 2-connecting piece, 3-bolt, 31-screw. DETAILED DESCRIPTION

[0018] 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 only part of the embodiments of the present invention, rather than all 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.

[0019] See also Figure 1 In an embodiment of the present invention, a combination nut for preventing loosening and theft includes a nut body 1, a connecting piece 2, and a bolt 3. A flange ring 114 is provided at the bottom of the nut body 1, and the flange ring fixes the connecting piece 2 downward. A bolt 3 is provided below the connecting piece 2, and the bolt 3 is threadedly connected to the nut body 1 upward through a screw rod 31.

[0020] See also Figure 4 , Figure 5In the embodiment of the present invention, a combination nut is provided for preventing loosening and theft. The fixing member 115 comprises a contact plate 1151, an elastic block 1152, a top block 1153 and a clamping block 1154. The contact plate 1151 is circular, and the bottom surface of the contact plate 1151 is rough to increase the friction of the contact surface. The contact plate 1151 is connected to the elastic block 1152 upward, and the top of the elastic block 1152 is connected to the top block 1153. Clamping blocks 1154 are arranged on both sides of the top block 1153. The clamping blocks 1154 are elastic and can be extended left and right.

[0021] Embodiment 1 See also Figure 2 , Figure 5 In the embodiment of the present invention, a combination nut for preventing loosening and theft is provided. The nut body 1 comprises an inner nut 11 and an outer nut 12. The outer nut 12 is connected to the outer side of the inner nut 11 by threads. The cross section of the inner nut 11 is circular, and the outer nut 12 is hexagonal. The inner nut 11 comprises an inner nut body 111, a fixing hole 112, a connecting outer thread 113, a flange ring 114, a fixing member 115, an anti-loosening tooth 116, an outer nut groove 117, and an inner thread 118. The lower part of the inner nut body 111 is provided with a flange ring 114, and the outer side of the inner nut body 111 is provided with a connecting outer thread 113, a fixing hole 112 is provided between the connecting external threads 113, an external nut groove 117 is provided at the connection between the internal nut body 111 and the flange ring 114, the bottom of the external nut 12 is fixed in the external nut groove 117, a plurality of fixing parts 115 are provided on the outer ring of the flange ring 114, and anti-loosening teeth 116 are provided on the bottom of the flange ring 114, an internal thread 118 is provided on the inner side of the internal nut body 111, the connecting external threads 113 are in the same direction as the internal threads 118, a connecting internal thread 121 is provided on the inner side of the external nut 12, and the connecting internal thread 121 matches the connecting external threads 113.

[0022] Working principle: When the anti-loosening and anti-theft combination nut of the present invention is in use, the nut is fixed at the connection by rotating the hexagonal outer nut 12, and the top block 1153 of the fixing member 115 arranged in the flange ring 114 is pressed down, so that the top block 1153 is clamped under the clamping blocks 1154 on both sides, and the elastic block 1152 is against the contact plate 1151 below, so as to improve the fixing ability of the connection. In this embodiment, there is no need to disassemble the outer nut 12, and the fit of the inner and outer nuts is improved by the outer nut groove 117, so as to achieve the purpose of preventing them from being eroded by water vapor.

[0023] Embodiment 2 See also Figure 3 In the embodiment of the present invention, a combination nut is provided to prevent loosening and theft. The difference lies in that the outer nut 12 is rotated and separated, and the screw rod 31 and the nut body 1 are fixed by a fixing bolt 13 through a fixing hole 112.

[0024] Working principle: When the anti-loosening and anti-theft combination nut of the present invention is in use, the nut is fixed at the connection by rotating the hexagonal outer nut 12, and the top block 1153 of the fixing part 115 set in the flange ring 114 is pressed down to make the top block 1153 stuck under the two side blocks 1154, and the elastic block 1152 abuts against the contact plate 1151 below to improve the fixing ability of the connection. At this time, the outer nut 12 is rotated to separate from the inner nut 11, and the fixing bolt 13 is rotated inward through the fixing hole 112 to fix it. At this time, the fixing bolt 13 pushes the fixing pressure ring 131 to achieve a better fixing effect on the screw rod 31. Since the cross-section of the inner nut 12 is circular, it is difficult for thieves to rotate it with a wrench, thereby improving the anti-theft property of the nut.

[0025] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A combination nut for preventing loosening and theft, characterized in that: The invention comprises a nut body (1), a connecting piece (2), and a bolt (3). The bottom of the nut body (1) is provided with a flange ring (114), the flange ring fixes the connecting piece (2) downward, a bolt (3) is provided below the connecting piece (2), and the bolt (3) is threadedly connected to the nut body (1) upward through a screw rod (31).

2. The anti-loosening and anti-theft combination nut according to claim 1, characterized in that: The nut body (1) comprises an inner nut (11) and an outer nut (12); the outer nut (12) is connected to the outer side of the inner nut (11) via threads; the inner nut (11) has a circular cross section, and the outer nut (12) is hexagonal.

3. The anti-loosening and anti-theft combination nut according to claim 2, characterized in that: The inner nut (11) comprises an inner nut body (111), a fixing hole (112), a connecting external thread (113), a flange ring (114), a fixing piece (115), anti-loosening teeth (116), an external nut groove (117), and an internal thread (118). The lower part of the inner nut body (111) is provided with a flange ring (114), the outer side of the inner nut body (111) is provided with a connecting external thread (113), a fixing hole (112) is provided between the connecting external threads (113), an external nut groove (117) is provided at the connection between the inner nut body (111) and the flange ring (114), a plurality of fixing pieces (115) are provided on the outer ring of the flange ring (114), anti-loosening teeth (116) are provided at the bottom of the flange ring (114), and an internal thread (118) is provided on the inner side of the inner nut body (111).

4. The anti-loosening and anti-theft combination nut according to claim 3, characterized in that: The fixing member (115) comprises a contact plate (1151), an elastic block (1152), a top block (1153), and a clamping block (1154); the contact plate (1151) is circular; the contact plate (1151) is upwardly connected to the elastic block (1152); the top of the elastic block (1152) is connected to the top block (1153); and clamping blocks (1154) are provided on both sides of the top block (1153).

5. The anti-loosening and anti-theft combination nut according to claim 4, characterized in that: The bottom surface of the contact plate (1151) is rough, thereby increasing the friction of the contact surface.

6. The anti-loosening and anti-theft combination nut according to claim 4, characterized in that: The clamping block (1154) is elastic and can be extended and retracted left and right.

7. The anti-loosening and anti-theft combination nut according to claim 3, characterized in that: The connecting external thread (113) and the internal thread (118) are in the same direction.

8. The anti-loosening and anti-theft combination nut according to claim 2, characterized in that: The nut body (1) further comprises a fixing bolt (13), wherein the fixing bolt (13) is connected and fixed via a fixing hole (112), and a fixing pressure ring (131) is provided on the inner side of the fixing bolt (13).

9. The anti-loosening and anti-theft combination nut according to claim 2, characterized in that: The bottom of the outer nut (12) is fixed in the outer nut groove (117).

10. The anti-loosening and anti-theft combination nut according to claim 2, characterized in that: The inner side of the outer nut (12) is provided with a connecting internal thread (121), and the connecting internal thread (121) matches the connecting external thread (113).

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