CN215720088U - Double-height straight-line knurled self-locking bolt - Google Patents
Double-height straight-line knurled self-locking bolt Download PDFInfo
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- CN215720088U CN215720088U CN202121890958.4U CN202121890958U CN215720088U CN 215720088 U CN215720088 U CN 215720088U CN 202121890958 U CN202121890958 U CN 202121890958U CN 215720088 U CN215720088 U CN 215720088U
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Abstract
The utility model discloses a double-high straight-line knurled self-locking bolt, which comprises a bolt body, wherein the bolt body comprises a screw rod and a screw head arranged at the end part of the screw rod, one end of the screw rod, which is close to the screw head, is provided with a first straight-line knurled section, a second straight-line knurled section is arranged between the first straight-line knurled section and the screw head, the diameters of the second straight-line knurled section, the first straight-line knurled section and the screw rod are sequentially reduced, the first straight-line knurled section is provided with a plurality of first expansion spring pieces, the second straight-line knurled section is provided with a plurality of second expansion spring pieces, the first expansion spring pieces and the second expansion spring pieces both have certain elasticity, an expansion driving rod which can be matched with the first expansion spring pieces and the second expansion spring pieces to drive the first expansion spring pieces and the second expansion spring pieces to move to the side far away from the center of the bolt body is arranged in the bolt body, the bolt body can be tightly pushed and fixed, and the bolt body is prevented from loosening and falling off before the nut is not fixed.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of fasteners, in particular to the technical field of knurled self-locking bolts.
[ background of the utility model ]
Bolts, one of the most common mechanical parts, are cylindrical threaded fasteners fitted with nuts. Bolt: 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 knurling bolt is one kind of bolt, and at present, the bolt of a current area annular knurl is equipped with the external screw thread including pole portion, head on pole portion, outwards extends in the pole portion between external screw thread and the head and has annular flange, is equipped with the annular knurl on annular flange's the lateral wall. However, the knurling on the annular flange of the bolt with the knurling structure is easily scratched when being installed, and the bolt can generate a loosening phenomenon after being used for a long time, so that the connection reliability between connecting pieces is influenced; and such bolts are not sufficiently stable until the nut is not secured; moreover, during installation, the bolt can swell violently to enlarge the bolt hole, so that the new bolt and the bolt hole are not ideally assembled when being replaced, and other measures are needed to ensure the reliability of connection between the connecting pieces.
[ Utility model ] content
The utility model aims to solve the problems in the prior art and provides a double-high straight-line knurled self-locking bolt which can improve the stability of the bolt in a screw hole.
In order to achieve the purpose, the utility model provides a double-high straight-line knurled self-locking bolt, which comprises a bolt body, wherein the bolt body comprises a screw rod and a screw head arranged at the end part of the screw rod, one end of the screw rod, which is close to the screw head, is provided with a first straight-line knurled section, a second straight-line knurled section is arranged between the first straight-line knurled section and the screw head, the diameters of the second straight-line knurled section, the first straight-line knurled section and the screw rod are sequentially reduced, the first straight-line knurled section is provided with a plurality of first expansion spring sheets, the second straight-line knurled section is provided with a plurality of second expansion spring sheets, the first expansion spring sheet and the second expansion spring sheets both have certain elasticity, an expansion driving rod which can be matched with the first expansion spring sheets and the second expansion spring sheets to drive the first expansion spring sheets and the second expansion spring sheets to move towards the side far away from the center of the bolt body is arranged in the bolt body, the bolt body is internally provided with an expansion rod movable cavity used for arranging the expansion driving rod, one end of the expansion rod movable cavity is provided with an opening, the expansion driving rod comprises a thick rod section and a thin rod section, the thick rod section is close to the opening end, the thin rod section is integrally connected with the thick rod section, the diameter of the thin rod section is smaller than that of the thick rod section, the expansion rod movable cavity comprises a thick diameter section matched with the thick rod section and a thin diameter section matched with the thin rod section, the thick rod section is provided with a first conical surface part, the diameter of the first conical surface part is gradually reduced from the position close to the thin rod section to the position far away from the thin rod section, the thin rod section is provided with a second conical surface part, the diameter of the first conical surface part is gradually reduced from the position far away from the thick rod section to the position close to the thick rod section, the inner wall of the first expansion elastic sheet extends into the thick diameter section, and the inner wall of the first expansion elastic sheet is provided with a first expansion elastic sheet inclined surface matched with the first expansion sheet part, the inner wall of the second expansion elastic sheet extends into the small-diameter section, and a second expansion elastic sheet inclined plane which can be matched with the second conical surface portion is arranged on the inner wall of the second expansion elastic sheet.
Preferably, a movable internal thread section is arranged in the movable cavity of the expansion rod, and an expansion driving rod thread section capable of being meshed with the movable internal thread section is arranged on the surface of the expansion driving rod.
Preferably, one end of the expansion driving rod, which is close to the opening, is provided with a wrench bayonet.
Preferably, the first expansion elastic sheet, the second expansion elastic sheet and the bolt body are integrally formed.
The utility model discloses a double-high straight-line knurled self-locking bolt, which has the beneficial effects that: the utility model arranges the first straight knurling section and the second straight knurling section on the screw rod, the two straight knurling sections have different diameters, so that the screw rod can be matched with two straight grain knurled holes with different diameters, the use is more convenient and flexible, by arranging the expansion driving rod to be matched with the first expansion elastic sheet and the second expansion elastic sheet, under the common daily state, the outer walls of the first expansion elastic sheet and the second expansion elastic sheet are flush with the first straight knurling section and the second straight knurling section, when the expansion driving rod slides to the opening end, the first conical surface part can be matched with the inclined surface of the first expansion elastic sheet to push the first expansion elastic sheet outwards, the second conical surface part can be matched with the inclined surface of the second expansion elastic sheet to push the second expansion elastic sheet outwards, the first expansion elastic sheet and the second expansion elastic sheet are enabled to protrude from the inclined plane and can be matched with the straight knurled hole, the bolt body is tightly fixed, and the bolt body is prevented from loosening and falling off before the nut is not fixed.
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 schematic structural view of a double-high straight-line knurled self-locking bolt according to the utility model.
FIG. 2 is a schematic view of a front cross-sectional structure of a double-high straight-line knurled self-locking bolt according to the present invention
In the figure: the expansion joint comprises a 1-screw, a 2-screw head, a 3-first straight thread knurled section, a 4-second straight thread knurled section, a 5-expansion driving rod, a 6-first expansion elastic sheet, a 7-second expansion elastic sheet, an 11-expansion rod movable cavity, a 111-large diameter section, a 112-small diameter section, a 113-movable cavity internal thread section, a 1111-opening, a 51-large rod section, a 52-small rod section, a 53-expansion driving rod thread section, a 54-wrench bayonet, a 511-first conical surface section, a 521-second conical surface section, a 61-first expansion elastic sheet inclined surface and a 71-second expansion elastic sheet inclined surface.
[ 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 and 2, the double-high straight-line knurled self-locking bolt comprises a bolt body, wherein the bolt body comprises a screw rod 1 and a screw head 2 arranged at the end part of the screw rod 1, one end of the screw rod 1 close to the screw head 2 is provided with a first straight-line knurled section 3, a second straight-line knurled section 4 is arranged between the first straight-line knurled section 3 and the screw head 2, the diameters of the second straight-line knurled section 4, the first straight-line knurled section 3 and the screw rod 1 are sequentially reduced, the first straight-line knurled section 3 is provided with a plurality of first expansion elastic sheets 6, the second straight-line knurled section 4 is provided with a plurality of second expansion elastic sheets 7, the first expansion elastic sheets 6 and the second expansion elastic sheets 7 have certain elasticity, and the bolt body is internally provided with a bolt body which can be matched with the first expansion elastic sheets 6 and the second expansion elastic sheets 7 to drive the first expansion elastic sheets 6, The second expansion spring 7 is far away from the expansion driving rod 5 which is movable at the center side of the bolt body, the bolt body is provided with an expansion rod movable cavity 11 for arranging the expansion driving rod 5, one end of the expansion rod movable cavity 11 is provided with an opening 1111, the expansion driving rod 5 comprises a thick rod section 51 which is arranged near the opening 1111 end and a thin rod section 52 which is integrally connected with the thick rod section 51 and has a diameter smaller than that of the thick rod section 51, the expansion rod movable cavity 11 comprises a thick diameter section 111 which can be matched with the thick rod section 51 and a thin diameter section 112 which can be matched with the thin rod section 52, the thick rod section 51 is provided with a first conical surface portion 511 which is close to the thin rod section 52 and is far away from the thin rod section 52, the diameter of the first conical surface portion is gradually reduced, the thin rod section 52 is provided with a second conical surface portion 521 which is far away from the thick rod section 51 and is close to the thick rod section 51, the inner wall of the first expansion elastic sheet 6 extends into the large-diameter section 111, the inner wall of the first expansion elastic sheet 6 is provided with a first expansion elastic sheet inclined surface 61 matched with the first conical surface part 511, the inner wall of the second expansion elastic sheet 7 extends into the small-diameter section 112, and the inner wall of the second expansion elastic sheet 7 is provided with a second expansion elastic sheet inclined surface 71 matched with the second conical surface part 521. In the embodiment, the screw 1 is provided with the first straight knurling section 3 and the second straight knurling section 4, the two straight knurling sections with different diameters are arranged, so that the screw can be matched with two straight knurling holes with different diameters, the use is more convenient and flexible, the expansion driving rod 5 is matched with the first expansion elastic sheet 6 and the second expansion elastic sheet 7, under a common daily state, the outer walls of the first expansion elastic sheet 6 and the second expansion elastic sheet 7 are flush with the first straight knurling section 3 and the second straight knurling section 4, when the expansion driving rod 5 slides towards the opening 1111 end, the first conical surface portion 511 can be matched with the first expansion elastic sheet inclined surface 61 to push the first expansion elastic sheet 6 outwards, the second conical surface portion 521 can be matched with the second expansion elastic sheet inclined surface 71 to push the second expansion elastic sheet 7 outwards, so that the first expansion elastic sheet 6 and the second expansion elastic sheet inclined surface 71 can be matched with the straight knurling holes, the bolt body is tightly propped and fixed, so that the bolt body is prevented from loosening and falling off before the nut is not fixed.
Referring to fig. 1 and 2, a movable internal threaded section 113 is arranged in the expansion link movable cavity 11, and an expansion driving link threaded section 53 capable of being engaged with the movable internal threaded section 113 is arranged on the surface of the expansion driving link 5. The expansion driving rod 5 is fixed and the position of the expansion driving rod 5 is adjusted through the matching of the driving rod thread section 53 and the movable cavity thread section 113.
Referring to fig. 1 and 2, a wrench socket 54 is provided at one end of the expansion driving rod 5 near the opening 1111.
Referring to fig. 1 and 2, the first expansion spring 6 and the second expansion spring 7 are integrally formed with the bolt body.
The working process of the utility model is as follows:
in the working process of the double-high straight-line knurled self-locking bolt, the screw rod 1 is provided with the first straight-line knurled section 3 and the second straight-line knurled section 4 which have different diameters, so that the screw rod can be matched with straight-line knurled holes with two different diameters, the use is more convenient and flexible, the expansion driving rod 5 is matched with the first expansion elastic sheet 6 and the second expansion elastic sheet 7, under the ordinary daily state, the outer walls of the first expansion elastic sheet 6 and the second expansion elastic sheet 7 are flush with the first straight-line knurled section 3 and the second straight-line knurled section 4, when the expansion driving rod 5 slides towards the opening 1111 end, the first conical surface part 511 can be matched with the first expansion elastic sheet inclined surface 61 to push the first expansion elastic sheet 6 outwards, and the second conical surface part 521 can be matched with the second expansion elastic sheet inclined surface 71 to push the second expansion elastic sheet 7 outwards, so that the first expansion elastic sheet 6 is pushed outwards, The second expansion spring plate inclined plane 71 protrudes to be matched with the straight knurling hole to tightly support and fix the bolt body.
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 (4)
1. The utility model provides a two high straight line annular knurls self-locking bolt, includes the bolt body, the bolt body includes screw rod (1) and locates spiral shell head (2) of screw rod (1) tip, its characterized in that: a first straight knurling section (3) is arranged at one end, close to the screw head (2), of the screw rod (1), a second straight knurling section (4) is arranged between the first straight knurling section (3) and the screw head (2), the diameters of the second straight knurling section (4), the first straight knurling section (3) and the screw rod (1) are sequentially reduced, a plurality of first expansion elastic sheets (6) are arranged at the first straight knurling section (3), a plurality of second expansion elastic sheets (7) are arranged at the second straight knurling section (4), the first expansion elastic sheets (6) and the second expansion elastic sheets (7) both have certain elasticity, an expansion driving rod (5) which can be matched with the first expansion elastic sheets (6) and the second expansion elastic sheets (7) to drive the first expansion elastic sheets (6) and the second expansion elastic sheets (7) to move towards the side far away from the center of the screw body is arranged in the screw body, the bolt body is internally provided with an expansion rod movable cavity (11) used for arranging the expansion driving rod (5), one end of the expansion rod movable cavity (11) is provided with an opening (1111), the expansion driving rod (5) comprises a thick rod section (51) close to the opening (1111) end and a thin rod section (52) integrally connected with the thick rod section (51) and having a diameter smaller than that of the thick rod section (51), the expansion rod movable cavity (11) comprises a thick diameter section (111) capable of being matched with the thick rod section (51) and a thin diameter section (112) capable of being matched with the thin rod section (52), the thick rod section (51) is provided with a first conical surface portion (511) close to the thin rod section (52) and gradually reducing the diameter, the thin rod section (52) is provided with a second conical surface portion (521) gradually reducing the diameter close to the thick rod section (51) and gradually reducing the diameter, the inner wall of the first expansion elastic sheet (6) extends into the large-diameter section (111) and the inner wall of the first expansion elastic sheet (6) is provided with a first expansion elastic sheet inclined plane (61) matched with the first conical surface section (511), and the inner wall of the second expansion elastic sheet (7) extends into the small-diameter section (112) and the inner wall of the second expansion elastic sheet (7) is provided with a second expansion elastic sheet inclined plane (71) matched with the second conical surface section (521).
2. The self-locking bolt with double high straight knurls as claimed in claim 1, wherein: a movable inner threaded section (113) is arranged in the expansion rod movable cavity (11), and an expansion driving rod threaded section (53) which can be meshed with the movable inner threaded section (113) is arranged on the surface of the expansion driving rod (5).
3. The self-locking bolt with double high straight knurls as claimed in claim 1, wherein: one end of the expansion driving rod (5) close to the opening (1111) is provided with a wrench bayonet (54).
4. The self-locking bolt with double high straight knurls as claimed in claim 1, wherein: the first expansion elastic sheet (6), the second expansion elastic sheet (7) and the bolt body are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121890958.4U CN215720088U (en) | 2021-08-12 | 2021-08-12 | Double-height straight-line knurled self-locking bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121890958.4U CN215720088U (en) | 2021-08-12 | 2021-08-12 | Double-height straight-line knurled self-locking bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215720088U true CN215720088U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121890958.4U Active CN215720088U (en) | 2021-08-12 | 2021-08-12 | Double-height straight-line knurled self-locking bolt |
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| CN (1) | CN215720088U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467889A (en) * | 2022-08-25 | 2022-12-13 | 海盐龙晟科技股份有限公司 | High-tightness axial displacement transmission screw |
-
2021
- 2021-08-12 CN CN202121890958.4U patent/CN215720088U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467889A (en) * | 2022-08-25 | 2022-12-13 | 海盐龙晟科技股份有限公司 | High-tightness axial displacement transmission screw |
| CN115467889B (en) * | 2022-08-25 | 2024-07-26 | 海盐龙晟科技股份有限公司 | High-tightness axial displacement driving screw |
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