Bolt and nut fastening assembly structure

Abstract

The utility model discloses a bolt and nut fastening assembly structure which comprises a bolt rod part, a through groove is formed in the lower portion of the bolt rod part, a nut body is connected to the bolt rod part in a threaded mode, a fixing groove is formed in the nut body, a first fixing plate is arranged at the lower end of the nut body, and a fixing rod penetrating through the fixing groove is arranged on the first fixing plate. A second fixing plate is arranged at the upper end of the nut body, a notch allowing the rod portion of the bolt to penetrate through is formed in the middle of the second fixing plate, a limiting groove is formed in the inner side, facing the second fixing plate, of the notch, a limiting hole is formed in the lower groove wall of the limiting groove, a limiting plate is arranged in the limiting groove and penetrates through the fixing rod, and a positioning groove horizontally penetrating through the first fixing plate is formed in the first fixing plate. A positioning rod is arranged in the positioning groove and penetrates through the through groove. The structure change of the nut is reduced, the positioning rods are designed through the two sets of fixing plates, the positioning rods are matched with the through grooves of the screw rod, relative limiting of the nut and the screw rod is achieved, relative rotation is prevented, the stability of nut and bolt connection is guaranteed, and the anti-loosening performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a bolt and nut fastening assembly structure. Background Art

[0002] Bolts and nuts are one of the common fastening connectors with a wide range of applications. They are generally used to connect more than two fasteners. However, ordinary bolts and nuts are prone to loosening under vibration conditions when used. Long-term loosening will cause the nuts to loosen, affecting the connection and fastening effect. The existing invention patent with patent number 202010842727.X announces a double-nut anti-loosening bolt group, which achieves the stability of the two sets of nuts by setting two nuts and providing a connecting limiter between the two nuts to increase the contact area with the screw and improve the anti-loosening performance; however, the two sets of nuts are connected to form a whole, and the whole may also loosen under vibration conditions, and thus the connection stability between the nut and the screw still has room for improvement. Utility Model Content

[0003] The utility model aims to provide a bolt and nut fastening assembly structure with good anti-loosening effect in view of the deficiencies existing in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a bolt and nut fastening assembly structure, which adopts the following technical solutions:

[0005] The bolt and nut fastening assembly structure comprises a bolt body, the bolt body comprises a bolt end and a bolt rod, the lower portion of the bolt rod is provided with a through slot radially penetrating the bolt rod, the bolt rod is screwed on the nut body, the nut body is provided with a fixing slot that penetrates the nut body up and down, the lower end of the nut body is provided with a first fixing plate, the first fixing plate is provided with a fixing rod passing through the fixing slot, the upper end of the nut body is provided with a second fixing plate, the middle portion of the second fixing plate is provided with a notch through which the bolt rod passes, the notch is provided with a limiting groove on the inner side of the second fixing plate facing the second fixing plate, the lower groove wall of the limiting groove is provided with a limiting hole, the limiting hole is used for the fixing rod to pass through, a limiting plate is provided in the limiting groove, the limiting plate passes through the fixing rod, the first fixing plate is provided with a positioning groove that horizontally penetrates the first fixing plate, the positioning groove passes through the center of the first fixing plate, a positioning rod is provided in the positioning groove, and the positioning rod passes through the through groove.

[0006] A further improvement in the structure of a bolt and nut fastening assembly of the utility model is that a positioning hole is provided on the upper groove wall of the positioning groove, a second fixing groove is provided on the nut body which runs through the nut body from top to bottom, a second fixing rod is provided on the second fixing plate, the second fixing rod passes through the second fixing groove and the positioning hole and abuts against the positioning rod, and an elastic pad is provided at the lower end of the second fixing rod.

[0007] A further improvement of the bolt and nut fastening assembly structure of the utility model is that two groups of fixing grooves are provided, four groups of positioning grooves are provided, and eight groups of the second fixing grooves are provided.

[0008] A further improvement of the bolt and nut fastening assembly structure of the utility model is that an anti-slip protrusion is provided at one end of the limiting plate close to the notch, and a buffer pad is provided at the other end.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model reduces the structural change of the nut, and the positioning rods are designed with two sets of fixing plates. The positioning rods cooperate with the through grooves of the screw rods to achieve relative limitation of the two, prevent relative rotation, ensure the stability of the nut and bolt connection, and improve the anti-loosening performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] In the figure: 1 bolt end, 2 bolt rod, 3 nut body, 4 first fixing plate, 5 second fixing plate, 6 fixing rod, 7 limiting groove, 8 limiting plate, 9 positioning groove, 10 second fixing rod, 11 through groove. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] like Figure 1As shown, a bolt and nut fastening assembly structure includes a bolt body, the bolt body includes a bolt end 1 and a bolt rod 2, a through groove 11 is provided at the lower part of the bolt rod to penetrate the bolt rod in a radial direction, a nut body 3 is screwed on the bolt rod, a fixing groove is provided on the nut body to penetrate the nut body from top to bottom, a first fixing plate 4 is provided at the lower end of the nut body, a fixing rod 6 is provided on the first fixing plate to penetrate the fixing groove, a second fixing plate 5 is provided at the upper end of the nut body, a notch is provided in the middle of the second fixing plate for the bolt rod to penetrate, a limiting groove 6 is provided on the inner side of the notch facing the second fixing plate, a limiting hole is provided on the lower groove wall of the limiting groove, the limiting hole is used for the fixing rod to penetrate, a limiting plate 8 is provided in the limiting groove, the limiting plate passes through the fixing rod, a positioning groove 9 is provided on the first fixing plate to penetrate the first fixing plate horizontally, the positioning groove passes through the center of the first fixing plate, a positioning rod is provided in the positioning groove, and the positioning rod passes through the through groove. Since a notch is also provided in the middle of the first fixing plate for the screw rod to penetrate, the positioning groove is divided into two parts, which are arranged on both sides of the center.

[0015] Furthermore, a positioning hole is provided on the upper groove wall of the positioning groove, a second fixing groove is provided on the nut body that runs through from top to bottom, a second fixing plate is provided with a second fixing rod 10, the second fixing rod passes through the second fixing groove and the positioning hole and abuts against the positioning rod, and an elastic pad is provided at the lower end of the second fixing rod. The second fixing rod squeezes and limits the positioning rod, including stabilizing the positioning rod after insertion, thereby preventing the nut and the bolt from rotating relative to each other.

[0016] Preferably, there are two groups of fixing slots, four groups of positioning slots, and eight groups of second fixing slots. The fixing slots and the second fixing slots are arranged staggered. There are four groups of positioning slots to ensure that the nut fine-tuning can achieve the positioning rod passing through the through slot.

[0017] An anti-slip protrusion is arranged at one end of the limit plate close to the notch, and a buffer pad is arranged at the other end, so as to further increase the connection stability between the nut and the bolt.

[0018] The working principle of the utility model is as follows: the fixing rod of the first fixing plate is inserted into and passes through the nut body into the limiting groove of the second fixing plate. At this time, the second fixing rod of the second fixing plate also passes through the nut body into the positioning groove. The limiting plate is used to be inserted into the limiting groove and pass through the fixing rod to realize the positioning of the first fixing plate and the second fixing plate. Then, the appropriate positioning groove is fine-tuned and the positioning rod is inserted so that the positioning rod passes through the through groove. At this time, the second fixing rod is clamped against the positioning rod. As a whole, the positioning rod prevents the bolt and the nut from relative rotation, thereby ensuring its anti-loosening performance.

[0019] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A bolt and nut fastening assembly structure, characterized in that: The bolt body comprises a bolt body, the bolt body comprises a bolt end and a bolt rod, the lower portion of the bolt rod is provided with a through groove radially penetrating the bolt rod, the bolt rod is screwed on a nut body, the nut body is provided with a fixing groove penetrating the nut body from top to bottom, the lower end of the nut body is provided with a first fixing plate, the first fixing plate is provided with a fixing rod passing through the fixing groove, the upper end of the nut body is provided with a second fixing plate, the middle portion of the second fixing plate is provided with a notch for the bolt rod to pass through, the notch is provided with a limiting groove on the inner side of the second fixing plate facing the notch, the lower groove wall of the limiting groove is provided with a limiting hole, the limiting hole is used for the fixing rod to pass through, a limiting plate is provided in the limiting groove, the limiting plate passes through the fixing rod, the first fixing plate is provided with a positioning groove horizontally penetrating the first fixing plate, the positioning groove passes through the center of the first fixing plate, a positioning rod is provided in the positioning groove, and the positioning rod passes through the through groove.

2. A bolt and nut fastening assembly structure according to claim 1, characterized in that: A positioning hole is provided on the upper groove wall of the positioning groove, a second fixing groove penetrating from top to bottom is provided on the nut body, a second fixing rod is provided on the second fixing plate, the second fixing rod passes through the second fixing groove and the positioning hole and abuts against the positioning rod, and an elastic pad is provided at the lower end of the second fixing rod.

3. A bolt and nut fastening assembly structure according to claim 2, characterized in that: The fixing grooves are provided in two groups, the positioning grooves are provided in four groups, and the second fixing grooves are provided in eight groups.

4. A bolt and nut fastening assembly structure according to claim 3, characterized in that: The limiting plate is provided with an anti-slip protrusion at one end close to the notch, and a buffer pad at the other end.

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