American gauge square neck bolt beneficial to high-precision machining

Abstract

The utility model discloses an American gauge square neck bolt beneficial to high-precision machining, and relates to the technical field of square neck bolts. The bolt comprises a screw rod piece, a nut piece, a round head end and a fastening pin, one end of the screw rod piece is provided with a threaded section, the nut piece is arranged on the threaded section in a threaded mode, the end, away from the threaded section, of the screw rod piece is integrally connected with a square neck part, grooves are formed in the opposite sides of the square neck part, and a transverse groove is formed in the square neck part and located between the two grooves. The transverse groove is of a through opening structure, one surface of the round head end is an arc face, and the other surface of the round head end is a flat face. According to the square neck bolt, the split type round head end is designed, the square neck part is completely exposed at the end of the screw rod piece, the round head end cannot block the square neck part, it is guaranteed that the square neck part has a large operation space, accurate machining of the square neck part is facilitated, the high precision of the size of the square neck part can be greatly improved and controlled, and therefore the locking effect of the square neck bolt is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of square neck bolts, and particularly relates to a US standard square neck bolt which is beneficial to high-precision machining. Background Art

[0002] For fasteners used in the US standard, most of them adopt round head square neck bolts. The surface of the round head is smooth and has good aesthetics. The positioning and anti-rotation effects can be achieved through the square neck part and the square opening of the installation opening on the installation position. Therefore, the accuracy requirements for the square neck part are relatively high. However, due to the proximity between the square neck part and the round head end, it is not conducive to the precise forming and subsequent finishing of the square neck bolt.

[0003] Therefore, designing a square neck bolt that can facilitate finishing is a problem that needs to be solved by the staff in this field. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a US standard square neck bolt which is beneficial to high-precision machining. By designing a split-type round head end, the square neck part is completely exposed at the end of the screw part, and the round head end will not block the square neck part, ensuring a large operating space for the square neck part, facilitating the precise machining of the square neck part, and greatly improving and controlling the high precision of the size of the square neck part, thereby improving the locking effect of the square neck bolt.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model is a US standard square neck bolt which is beneficial to high-precision machining, including a screw part, a nut part, a round head end and a fastening pin. One end of the screw part is provided with a threaded section, and the nut part is threadedly arranged on the threaded section;

[0007] One end of the screw part far from the threaded section is integrally connected with a square neck part. Grooves are provided on both opposite sides of the square neck part. A transverse groove is provided at a position between the two grooves on the square neck part, and the transverse groove is a through-port structure;

[0008] One surface of the round head end is an arc surface, and the other surface of the round head end is a flat surface. A group of connecting edges are integrally provided on the flat surface;

[0009] The flat surface of the round head end is movably connected with the end surface of the square neck part. The two connecting edges are respectively arranged in the two grooves with a gap. A through-port concentric with the transverse groove is provided on the connecting edge. The fastening pin is in interference connection or arranged with a gap between the transverse groove on the square neck part and the through-ports on the two connecting edges;

[0010] The round head end is fixed to the screw part through the fastening pin, the connecting edge and the transverse groove.

[0011] Further, a convex rod portion is provided between the threaded section and the square neck portion of the screw member, and the outer diameter of the convex rod portion is larger than that of the threaded section.

[0012] Further, the square neck portion is a square block structure, and the diameter of the round head end is larger than the width of the square neck portion.

[0013] Further, the diameter of the convex rod portion is smaller than the width of the square neck portion, and the groove is located at the outer side position of the convex rod portion.

[0014] Further, a guide slope edge is provided at the end of the threaded section, and the guide slope edge is a fillet or a chamfer.

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

[0016] The utility model has the following beneficial effects:

[0017] 1. By designing a split round head end, the square neck portion is completely exposed at the end of the screw member, and the round head end will not block the square neck portion, ensuring a large operating space for the square neck portion, facilitating precise machining of the square neck portion, and greatly improving and controlling the high precision of the dimensions of the square neck portion, thereby improving the locking effect of the square neck bolt.

[0018] 2. Through the design of the groove and the connecting edge, the positioning between the round head end and the screw member is facilitated. Through the design of the fastening pin, it can not only be used for the connection between the round head end and the screw member, but also bear the locking force between the round head end and the nut member, thereby improving the fastening performance and strength of the bolt.

[0019] 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

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of a US standard square neck bolt beneficial to high-precision machining according to the present utility model;

[0022] Figure 2 It is a schematic structural diagram of the screw member and the nut member;

[0023] Figure 3 It is a schematic structural diagram of the round head end;

[0024] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0025] 1 - Screw member, 2 - Nut member, 3 - Round head end, 4 - Fastening pin, 101 - Thread section, 102 - Square neck portion, 103 - Groove, 104 - Transverse groove, 105 - Convex rod portion, 106 - Guide slope edge, 301 - Connecting edge, 302 - Through port. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-3 As shown, the present invention is a US standard square neck bolt conducive to high-precision machining, including a screw member 1, a nut member 2, a round head end 3 and a fastening pin 4. One end of the screw member 1 is provided with a thread section 101, and the nut member 2 is threadedly arranged on the thread section 101;

[0028] One end of the screw member 1 away from the thread section 101 is integrally connected with a square neck portion 102. Grooves 103 are provided on both opposite sides of the square neck portion 102. A transverse groove 104 is provided on the square neck portion 102 at a position between the two grooves 103, and the transverse groove 104 is a through-port structure;

[0029] One surface of the round head end 3 is an arc surface, and the other surface is a flat surface. A group of connecting edges 301 are integrally provided on the flat surface;

[0030] The flat surface of the round head end 3 is movably connected to the end surface of the square neck portion 102. The two connecting edges 301 are respectively arranged in the two grooves 103 with a gap. A through port 302 concentric with the transverse groove 104 is provided on the connecting edge 301. The fastening pin 4 is press-fitted or arranged with a gap between the transverse groove 104 on the square neck portion 102 and the through ports 302 on the two connecting edges 301;

[0031] The round head end 3 is fixed to the screw member 1 through the fastening pin 4, the connecting edge 301 and the transverse groove 104.

[0032] Among them, as Figures 1-2 shown, a convex rod portion 105 is provided between the thread section 101 and the square neck portion 102 of the screw member 1, and the outer diameter of the convex rod portion 105 is larger than the outer diameter of the thread section 101.

[0033] Among them, as Figures 1-2 shown, the square neck portion 102 is a square block structure, and the diameter of the round head end 3 is larger than the width of the square neck portion 102.

[0034] As shown in Figure 1 it, the diameter of the convex rod portion 105 is smaller than the width of the square neck portion 102, and the groove 103 is located at the outer position of the convex rod portion 105.

[0035] As shown in Figure 1 it, a guide slope edge 106 is provided at the end of the threaded section 101, and the guide slope edge 106 is a rounded corner or a chamfer.

[0036] As shown in Figures 1-2 it, rounded corners or chamfers are provided at the four corners of the square neck portion 102.

[0037] Wherein, a square opening in clearance fit with the square neck portion 102 is provided on the mounting hole of the mounting position, and the end faces of both ends of the fastening pin 4 are respectively attached to both sides inside the square opening.

[0038] In the description of this specification, the descriptions referring 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.

[0039] The above-disclosed preferred embodiments of the present invention 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 variations 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 principle and practical application of the present invention, so that those skilled in the relevant technical field 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 US standard square neck bolt facilitating high-precision machining, comprising a screw rod member (1) and a nut member (2). One end of the screw rod member (1) is provided with a threaded section (101), and the nut member (2) is threadedly arranged on the threaded section (101). It is characterized in that: It also includes a round head end (3) and a fastening pin (4); One end of the screw member (1) away from the threaded section (101) is integrally connected with a square neck portion (102). Grooves (103) are provided on both opposite sides of the square neck portion (102). A transverse groove (104) is provided on the square neck portion (102) at a position between the two grooves (103). The transverse groove (104) is a through-port structure; One surface of the round head end (3) is an arc surface, and the other surface of the round head end (3) is a flat surface. A set of connecting edges (301) are integrally provided on the flat surface; The flat surface of the round head end (3) is movably connected to the end surface of the square neck portion (102). The two connecting edges (301) are respectively arranged in the two grooves (103) with a gap. A through-port (302) concentric with the transverse groove (104) is provided on the connecting edge (301). The fastening pin (4) is in interference connection or arranged with a gap between the transverse groove (104) on the square neck portion (102) and the through-ports (302) on the two connecting edges (301); The round head end (3) is fixed to the screw member (1) through the fastening pin (4), the connecting edge (301) and the transverse groove (104).

2. The US standard square neck bolt conducive to high-precision machining according to claim 1, wherein A convex rod portion (105) is provided between the threaded section (101) and the square neck portion (102) of the screw member (1). The outer diameter of the convex rod portion (105) is larger than the outer diameter of the threaded section (101).

3. The US standard square neck bolt beneficial to high-precision machining according to claim 1, characterized in that, The square neck portion (102) is a square block structure. The diameter of the round head end (3) is larger than the width of the square neck portion (102).

4. The U.S. standard square neck bolt beneficial to high-precision machining according to claim 2, characterized in that, The diameter of the convex rod portion (105) is smaller than the width of the square neck portion (102). The grooves (103) are located outside the convex rod portion (105).

5. A US standard square neck bolt conducive to high-precision machining according to claim 1, characterized in that, A guide slope edge (106) is provided at the end of the threaded section (101). The guide slope edge (106) is a fillet or a chamfer.

6. The US standard square neck bolt conducive to high-precision machining according to claim 1, characterized in that, Rounded corners or chamfers are provided at the four corners of the square neck portion (102).

Images