High-strength countersunk head square neck bolt

Abstract

The utility model discloses a high-strength countersunk square-neck bolt, and relates to the technical field of square-neck bolts. The screw comprises a screw part, a nut part and a reinforcing sleeve, a square neck part is arranged at one end of the screw part, the screw part is composed of a threaded section and a protruding rod section, the square neck part is arranged at the end of the protruding rod section, the outer diameter of the protruding rod section is larger than that of the threaded section, and a transition section of a conical structure is arranged at the end, close to the protruding rod section, of the square neck part. One end of the reinforcing sleeve is provided with an inner conical opening in clearance fit with the transition section, the inner side of the other end of the reinforcing sleeve is provided with an inner groove, one end of the nut piece is provided with an end plate, one end of the end plate away from the nut piece is provided with an inner sleeve, and the nut piece is arranged on the threaded section in a threaded mode. According to the square neck bolt, the reinforcing sleeve is arranged between the square neck part of the screw rod part and the nut part, and the high-strength reinforcing sleeve mainly bears impact force, so that the impact resistance and the strength of the square neck bolt can be greatly improved, and the fastening effect and the strength of the bolt are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of square neck bolts, and particularly relates to a high-strength countersunk head square neck bolt. Background Art

[0002] For square neck bolts, the square neck section at the end of the screw rod plays a role in positioning and preventing rotation. Convex points such as round heads are provided at the end of the square neck section. A nut is threadedly provided at the other end of the screw rod, and fastening is carried out through the locking force between the nut and the convex point.

[0003] When the bolt is impacted, the impact force will be directly transmitted to the screw rod, especially the screw rod between the convex point and the nut. If the impact force is strong, the screw rod is prone to deformation or even fracture risk, affecting the fastening performance and effect of the bolt.

[0004] Therefore, designing a high-strength and impact-resistant square neck bolt is a problem that needs to be solved by the staff in this field. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a high-strength countersunk head square neck bolt. By arranging a reinforcing sleeve between the square neck part of the screw rod and the nut part, the high-strength reinforcing sleeve mainly bears the impact force, which can greatly improve the impact resistance and strength of the square neck bolt, thereby improving the fastening effect and strength of the bolt.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model is a high-strength countersunk head square neck bolt, including a screw rod, a nut and a reinforcing sleeve. One end of the screw rod is provided with a square neck part;

[0008] The screw rod is composed of a threaded section and a convex rod section. The square neck part is arranged at the end of the convex rod section. The outer diameter of the convex rod section is larger than that of the threaded section. A transition section with a conical structure is arranged at one end of the square neck part close to the convex rod section;

[0009] The reinforcing sleeve is sleeved on the convex rod section. One end of the reinforcing sleeve is provided with an inner conical opening that is in clearance fit with the transition section. The inner side of the other end of the reinforcing sleeve is provided with an inner groove;

[0010] One end of the nut is provided with an end plate. An inner sleeve is provided at one end of the end plate away from the nut. The nut is threadedly arranged on the threaded section, and the inner sleeve on the nut is arranged in the inner groove with a clearance;

[0011] A gasket group is arranged between the end plate and the end of the reinforcing sleeve. The gasket group is a disc spring.

[0012] Further, a round head is arranged on the outer end face of the square neck part, and the end face of the round head end close to the square neck part is a plane structure.

[0013] Further, the disc spring is composed of a plurality of disc-shaped pieces, and the inner diameter and outer diameter of the disc-shaped pieces are respectively consistent with the outer diameter of the inner sleeve and the outer diameter of the reinforcing sleeve.

[0014] Further, the inner diameter of the reinforcing sleeve is consistent with the outer diameter of the convex rod section, and the inner diameter of the inner sleeve is consistent with the outer diameter of the convex rod section.

[0015] Further, fillets or chamfers are provided at the four corners of the square neck portion.

[0016] Further, an inclined guide slope is provided at the end of the threaded section.

[0017] The utility model has the following beneficial effects:

[0018] 1. By arranging a reinforcing sleeve between the square neck portion of the screw member and the nut member, the utility model can realize the combination between the reinforcing sleeve and the square neck portion through the cooperation of the transition section and the inner tapered opening, and can realize the combination between the nut and the reinforcing sleeve through the cooperation of the inner sleeve and the inner groove, that is, realize the overall connection between the square neck portion and the nut member and the reinforcing sleeve. The high-strength reinforcing sleeve mainly bears the impact force, which can greatly improve the impact resistance and strength of the square neck bolt, thereby improving the fastening effect and strength of the bolt.

[0019] 2. By arranging a disc spring as a gasket between the nut member and the reinforcing sleeve, the utility model can greatly improve the anti-loosening ability of the nut member. At the same time, the disc spring has a certain telescopic length, so as to realize the position fine adjustment of the nut member on the threaded section, ensure that the nut member can be stably locked, and ensure the normal use of the bolt.

[0020] Of course, it is not necessary for any product implementing the utility model to achieve all the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural view of a high-strength countersunk head square neck bolt of the present utility model;

[0023] Figure 2 It is a structural sectional view of the present utility model;

[0024] Figure 3 It is a schematic structural view of the screw member and the nut member;

[0025] Figure 4 It is a schematic structural diagram of the screw part;

[0026] Figure 5 It is a schematic structural diagram of the nut part;

[0027] In the attached drawings, the list of components represented by each label is as follows:

[0028] 1 - Screw part, 2 - Nut part, 3 - Reinforcing sleeve, 4 - Gasket set, 101 - Square neck part, 102 - Thread section, 103 - Convex rod section, 104 - Transition section, 105 - Round head, 201 - End plate, 202 - Inner sleeve, 301 - Inner conical opening, 302 - Inner groove. Specific implementation mode

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0030] Please refer to Figures 1-5 As shown, the present utility model is a high-strength countersunk head square neck bolt, including a screw part 1, a nut part 2 and a reinforcing sleeve 3. One end of the screw part 1 is provided with a square neck part 101;

[0031] The screw part 1 is composed of a thread section 102 and a convex rod section 103. The square neck part 101 is arranged at the end of the convex rod section 103. The outer diameter of the convex rod section 103 is larger than that of the thread section 102. A transition section 104 with a conical structure is provided at one end of the square neck part 101 close to the convex rod section 103;

[0032] The reinforcing sleeve 3 is sleeved on the convex rod section 103. One end of the reinforcing sleeve 3 is provided with an inner conical opening 301 that is in clearance fit with the transition section 104, and an inner groove 302 is provided on the inner side of the other end of the reinforcing sleeve 3;

[0033] One end of the nut part 2 is provided with an end plate 201. An inner sleeve 202 is provided at one end of the end plate 201 away from the nut part 2. The nut part 2 is threadedly arranged on the thread section 102, and the inner sleeve 202 on the nut part 2 is arranged in the inner groove 302 with a clearance;

[0034] A gasket set 4 is provided between the end plate 201 and the end of the reinforcing sleeve 3. The gasket set 4 is a disc spring.

[0035] Among them, as Figures 1-4 shown, a round head 105 is provided on the outer end face of the square neck part 101, and the end face of the round head 105 close to one end of the square neck part 101 is a flat structure.

[0036] Among them, as Figures 1-2As shown, the conical spring is composed of a number of conical discs. The inner diameter and outer diameter of the conical discs are respectively the same as the outer diameter of the inner sleeve 202 and the outer diameter of the reinforcing sleeve 3.

[0037] Among them, as Figure 2 shown, the inner diameter of the reinforcing sleeve 3 is the same as the outer diameter of the convex rod section 103, and the inner diameter of the inner sleeve 202 is the same as the outer diameter of the convex rod section 103.

[0038] Among them, as Figures 1-4 shown, rounded corners or chamfers are provided at the four corners of the square neck portion 101.

[0039] Among them, as Figures 1-4 shown, an inclined guide slope is provided at the end of the threaded section 102.

[0040] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0041] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A high-strength countersunk square neck bolt, comprising a screw member (1) and a nut member (2), wherein one end of the screw member (1) is provided with a square neck portion (101), and is characterized in that: It further includes a reinforcing sleeve (3); The screw member (1) is composed of a threaded section (102) and a convex rod section (103). The square neck portion (101) is arranged at the end of the convex rod section (103). The outer diameter of the convex rod section (103) is larger than that of the threaded section (102). A transition section (104) with a conical structure is provided at one end of the square neck portion (101) close to the convex rod section (103); The reinforcing sleeve (3) is sleeved on the convex rod section (103). An inner conical opening (301) which is in clearance fit with the transition section (104) is provided at one end of the reinforcing sleeve (3). An inner groove (302) is provided on the inner side of the other end of the reinforcing sleeve (3); One end of the nut member (2) is provided with an end plate (201). An inner sleeve (202) is provided at the end of the end plate (201) far from the nut member (2). The nut member (2) is threadedly arranged on the threaded section (102). The inner sleeve (202) on the nut member (2) is arranged in the inner groove (302) with a clearance; A gasket group (4) is provided between the end plate (201) and the end of the reinforcing sleeve (3). The gasket group (4) is a disc spring.

2. The high-strength countersunk square neck bolt according to claim 1, wherein A round head (105) is provided on the outer end face of the square neck portion (101). One end face of the round head (105) close to the square neck portion (101) is a planar structure.

3. The high-strength countersunk square neck bolt according to claim 1, wherein, The disc spring is composed of a plurality of disc-shaped pieces. The inner diameter and the outer diameter of the disc-shaped pieces are respectively the same as the outer diameter of the inner sleeve (202) and the outer diameter of the reinforcing sleeve (3).

4. The high-strength countersunk square neck bolt according to claim 1, wherein The inner diameter of the reinforcing sleeve (3) is the same as the outer diameter of the convex rod section (103). The inner diameter of the inner sleeve (202) is the same as the outer diameter of the convex rod section (103).

5. A high-strength countersunk square neck bolt according to claim 1, characterized in that, Rounded corners or chamfers are provided at the four corners of the square neck portion (101).

6. The high-strength countersunk square neck bolt according to claim 1, characterized in that, An inclined guide slope is provided at the end of the threaded section (102).

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