CN215720133U

CN215720133U - Fastening anti-skid square-head bolt

Info

Publication number: CN215720133U
Application number: CN202121879806.4U
Authority: CN
Inventors: 时燕军
Original assignee: Haiyan Julong Standard Parts Co ltd
Current assignee: Haiyan Julong Standard Parts Co ltd
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2022-02-01
Anticipated expiration: 2031-08-12

Abstract

The utility model discloses a fastening anti-skid square head bolt, which comprises a bolt body, wherein the bolt body comprises a screw rod and a square head arranged at the end part of the screw rod, one end of the screw rod, which is close to the square head, is provided with an anti-skid device, the anti-skid device comprises an expansion piece sleeved on the screw rod and an annular baffle disc arranged on the expansion piece, which is close to the end part of the square head, a certain gap is arranged between the annular baffle disc and the bottom surface of the square head in a free state, one end of the screw rod, which is close to the square head, is provided with a light rod section, and the light rod section is provided with a conical surface section which can be matched with the expansion piece to drive the expansion piece to expand, the friction force is improved, and the anti-loosening performance is improved.

Description

Fastening anti-skid square-head bolt

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of bolts, in particular to the technical field of fastening anti-skidding square-head bolts.

[ background of the utility model ]

Bolt: mechanical parts, cylindrical threaded fasteners fitted with nuts. A fastener consisting of a head and a screw is matched with a nut and used for fastening and connecting two parts with through holes. This form of connection is known as a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so that the bolt connection belongs to detachable connection. The existing bolt is simple in structure, poor in anti-loosening performance and easy to loosen after long-time work, and mechanical faults are caused.

[ Utility model ] content

The utility model aims to solve the problems in the prior art and provides a fastening anti-skidding square-head bolt which can improve the anti-loosening performance of the bolt.

In order to achieve the purpose, the utility model provides a fastening anti-skidding square head bolt which comprises a bolt body, wherein the bolt body comprises a screw rod and a square head arranged at the end part of the screw rod, an anti-skidding device is arranged at one end, close to the square head, of the screw rod, the anti-skidding device comprises an expansion piece sleeved on the screw rod and an annular blocking disc arranged on the expansion piece and close to the end part of the square head, a certain gap is formed between the annular blocking disc and the bottom surface of the square head in a free state, a light rod section is arranged at one end, close to the square head, of the screw rod, a conical surface section capable of being matched with the expansion piece to drive the expansion piece to expand is arranged on the light rod section, and the diameter of the conical surface section is gradually increased from the end far away from the square head to the end close to the square head.

Preferably, one end of the expansion piece, which is far away from the annular baffle disc, is provided with a plurality of open grooves, the open grooves divide the bottom of the expansion piece into a plurality of expansion spring pieces, and the inner wall of each expansion spring piece is provided with a spring piece inclined plane which can be matched with the conical surface section.

Preferably, the surface of the expansion elastic sheet is provided with a plurality of anti-skid protrusions.

Preferably, one end of the square screw head, which is close to the annular blocking disc, is provided with an annular groove which can be matched with the annular blocking disc.

Preferably, the bottom surface of the square screw head is provided with a plurality of anti-skid grains.

The utility model discloses a fastening anti-skid square-head bolt, which has the beneficial effects that: according to the utility model, the anti-loosening performance of the screwed bolt is improved by arranging the anti-slip device, the annular baffle disc can be firstly contacted with the surface of a workpiece in the screwing process of the bolt, the annular baffle disc is driven to move towards the end of the square bolt when the bolt is screwed, and the expansion piece can be matched with the conical surface section in the moving process to drive the expansion piece to expand and be matched with the bolt hole to prop against the inner wall of the bolt hole, so that the friction force is improved, and the anti-loosening performance is improved.

The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.

[ description of the drawings ]

Fig. 1 is a front view structural schematic diagram of a fastening anti-slip lag bolt of the present invention.

Fig. 2 is a front sectional view schematically illustrating the fastening of the anti-slip lag bolt according to the present invention.

Fig. 3 is a front view structural diagram of a bolt body for fastening an anti-slip square head bolt according to the present invention.

In the figure: 1-screw, 2-square screw head, 3-antiskid device, 11-polished rod section, 12-conical section, 21-annular groove, 22-antiskid line, 31-expansion piece, 32-annular baffle disc, 33-open slot, 34-expansion spring plate, 341-spring plate inclined plane.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the utility model and not to limit the scope of the utility model. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the products of the present invention are conventionally placed when used, and are merely used for convenience of describing and simplifying the description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

The first embodiment is as follows:

referring to fig. 1, 2 and 3, the fastening anti-slip square head bolt comprises a bolt body, wherein the bolt body comprises a screw rod 1 and a square head 2 arranged at the end of the screw rod 1, one end of the screw rod 1 close to the square head 2 is provided with an anti-slip device 3, the anti-slip device 3 comprises an expansion piece 31 sleeved on the screw rod 1 and an annular blocking disc 32 arranged on the expansion piece 31 close to the square head 2, a certain gap is arranged between the annular blocking disc 32 and the bottom surface of the square head 2 in a free state, one end of the screw rod 1 close to the square head 2 is provided with a light rod section 11, and the light rod section 11 is provided with a conical surface section 12 which can be matched with the expansion piece 31 to drive the expansion piece 31 to expand. This embodiment improves locking performance after the bolt tightening through setting up antiskid 3, and bolt tightening in-process annular keeps off the dish 32 can contact with the work piece surface earlier, and drive annular keeps off the dish 32 and moves to square spiral shell head 2 end when the bolt tightening, and the removal in-process inflation piece 31 can cooperate with conical surface section 12, and drive inflation piece 31 expands, cooperates with the screw, withstands the screw inner wall, improves frictional force to improve locking performance.

Referring to fig. 1, 2, and 3, a plurality of open grooves 33 are formed in an end of the expansion member 31 away from the annular baffle plate 32, the open grooves 33 divide the bottom of the expansion member 31 into a plurality of expansion resilient sheets 34, and a resilient sheet inclined surface 341 capable of being matched with the conical surface section 12 is formed on an inner wall of each expansion resilient sheet 34.

Referring to fig. 1, 2 and 3, the surface of the expansion spring plate 34 is provided with a plurality of anti-slip protrusions 35. Further improving the anti-loosening performance.

Referring to fig. 1, 2 and 3, an annular groove 21 which can be matched with the annular baffle disc 32 is formed at one end of the square screw head 2 close to the annular baffle disc 32. After the bolts are screwed down, the annular blocking disc 32 can extend into the annular groove 21, the annular blocking disc 32 is prevented from influencing the contact between the lower end face of the square screw head 2 and a workpiece, and the friction force between the square screw head 2 and the workpiece is not influenced.

Referring to fig. 1, 2 and 3, the bottom surface of the square screw head 2 is provided with a plurality of anti-slip threads 22.

The working process of the utility model is as follows:

in the working process of the fastening anti-slip square head bolt, the annular baffle disc 32 can be firstly contacted with the surface of a workpiece in the bolt tightening process, the annular baffle disc 32 is driven to move towards the end of the square screw head 2 in the bolt tightening process, the expansion piece 31 can be matched with the conical surface section 12 in the moving process, the expansion piece 31 is driven to expand and be matched with the screw hole to prop against the inner wall of the screw hole, and the friction force is improved, so that the anti-loosening performance is improved, the annular baffle disc 32 can extend into the annular groove 21 after the bolt tightening, and the annular baffle disc 32 is prevented from influencing the contact of the lower end surface of the square screw head 2 with the workpiece.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a fastening antiskid square head bolt, includes the bolt body, the bolt body includes screw rod (1) and locates square spiral shell head (2) of screw rod (1) tip, its characterized in that: be close to on screw rod (1) the one end of square spiral shell head (2) is equipped with antiskid (3), antiskid (3) are located including the cover expansion piece (31) on screw rod (1) with locate be close to on expansion piece (31) the annular of square spiral shell head (2) end keeps off dish (32), under the free state annular keep off dish (32) with be equipped with certain clearance between square spiral shell head (2) bottom surface, be close to on screw rod (1) the one end of square spiral shell head (2) is equipped with polished rod section (11), be equipped with on polished rod section (11) can with expansion piece (31) cooperation is in order to drive conical surface section (12) of expansion piece (31) inflation, conical surface section (12) are held to being close to square spiral shell head (2) end diameter by keeping away from square spiral shell head (2) and are crescent.

2. A fastening non-slip lag bolt as defined in claim 1, wherein: one end of the expansion piece (31) far away from the annular baffle disc (32) is provided with a plurality of open grooves (33), the bottom of the expansion piece (31) is divided into a plurality of expansion elastic sheets (34) by the open grooves (33), and the inner wall of each expansion elastic sheet (34) is provided with an elastic sheet inclined surface (341) matched with the conical surface section (12).

3. A fastening non-slip lag bolt as defined in claim 2, wherein: the surface of the expansion elastic sheet (34) is provided with a plurality of anti-skid protrusions (35).

4. A fastening non-slip lag bolt as defined in claim 1, wherein: one end of the square screw head (2) close to the annular blocking disc (32) is provided with an annular groove (21) which can be matched with the annular blocking disc (32).

5. A fastening non-slip lag bolt as defined in claim 1, wherein: the bottom surface of the square screw head (2) is provided with a plurality of anti-skid grains (22).