Bolt with adjustable length

Abstract

The utility model discloses a bolt with an adjustable length. The bolt comprises a hexagonal screw head, a core rod and an adjusting part, a hexagonal screw head is arranged at the left end of the core rod, the core rod comprises a round rod, a square rod is arranged at the left end of the round rod, the square rod is connected with the middle of the hexagonal screw head in an inserted mode, and a sleeve rod is arranged at the right end of the core rod. The hexagonal bolt has the advantages that through the separated structure of the hexagonal bolt head, the core rod, the sleeve rod, the adjusting part, the limiting part and the positioning pin column, on the premise that the normal function of the bolt is guaranteed, the overall length of the bolt can be adjusted, the special use requirements of a user are met, and the hexagonal bolt is simple in structure, convenient to use and high in practicability. And meanwhile, each component of the bolt can be detached and can be separately processed, so that not only is the subsequent mounting and dismounting facilitated, but also the subsequent processing of the product is facilitated, the subsequent processing production of the bolt with the adjustable length is ensured, and the popularization and the use of the product are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a bolt with adjustable length. Background Art

[0002] A bolt is a mechanical part, a cylindrical threaded fastener equipped with a nut; a type of fastener consisting of a head and a screw (a cylinder with external threads), which needs to be matched with a nut and is used to fasten two parts with through holes. With the changes in the places of use, more and more types of bolts are produced. For example, the patent with application number 202221501965.5 discloses a length-adjustable bolt, which can achieve length adjustment and is more practical.

[0003] Although the above-mentioned bolts can be adjusted in length, the components are difficult to assemble, which will cause great inconvenience to the subsequent production and use of the bolts.

[0004] For this purpose, we propose a bolt with adjustable length. Utility Model Content

[0005] The purpose of the present invention is to solve the above problems and provide advantages such as adjustable length, detachability, and easy installation, as described below.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a length-adjustable bolt, comprising a hexagonal screw head, a core rod and an adjusting part;

[0008] The left end of the core rod is provided with a hexagonal screw head, and the right end of the core rod is provided with a sleeve rod;

[0009] The adjusting portion is connected to the right end of the core rod, and a limiting portion is arranged at the right end of the adjusting portion.

[0010] Preferably, the core rod comprises a round rod, a square rod is provided at the left end of the round rod, the square rod and the middle part of the hexagonal screw head are plugged in, the square rod and the hexagonal screw head are connected by a positioning pin, a first threaded hole with an opening facing right is provided in the middle of the round rod, and two symmetrically distributed anti-rotation protrusions are provided at the right end of the round rod to realize the connection between the core rod and the hexagonal screw head, laying the foundation for the connection between the core rod, the sleeve rod and the adjustment part.

[0011] Preferably, a square slot corresponding to the square rod is provided in the middle of the hexagonal screw head, and the square rod and the square slot are installed in coordination, laying a foundation for the connection between the core rod and the hexagonal screw head.

[0012] Preferably, the sleeve rod comprises a hollow rod, which is sleeved on the outside of the round rod, and a first thread is provided on the outside of the hollow rod, and a second threaded hole is provided on the right end of the inside of the hollow rod, and the second threaded hole coincides with the internal center line of the hollow rod, and the diameter of the second threaded hole is larger than the inner diameter of the hollow rod, and the hollow rod is slidably connected to the anti-rotation protrusion to realize the installation between the sleeve rod and the core rod, thereby ensuring the sliding connection between the sleeve rod and the core rod.

[0013] Preferably, a slide groove corresponding to the anti-rotation protrusion is provided on the hollow rod, and the anti-rotation protrusion and the slide groove are installed in coordination, laying a foundation for the installation between the sleeve rod and the core rod.

[0014] Preferably, the adjusting part includes an inner screw, the left end of the inner screw is fitted with the first threaded hole, the right end of the inner screw is provided with a limiting plate, the right end of the limiting plate is provided with a columnar adjustment seat, and the middle part of the right end of the columnar adjustment seat is provided with an adjustment slot to realize the connection between the adjusting part and the right end of the core rod.

[0015] Preferably, the outer diameter of the limiting plate is larger than the inner diameter of the hollow rod, and the outer diameter of the limiting plate is smaller than the diameter of the second threaded hole, so as to limit the inner screw and prevent the inner screw from moving left and right with the core rod after the limiting part is installed.

[0016] Preferably, the limiting part includes a columnar limiting seat, the outer side of the columnar limiting seat is provided with a second thread matched with the second threaded hole, the middle part of the columnar limiting seat is provided with a circular hole corresponding to the columnar adjustment seat, the columnar adjustment seat extends into the circular hole, and the right end of the columnar limiting seat is provided with a flat opener groove to realize the connection and installation between the limiting part and the right end of the sleeve rod, thereby realizing the limitation of the right end of the adjustment part.

[0017] The beneficial effects of the utility model are:

[0018] Through the separate structure of the hexagonal screw head, core rod, sleeve rod, adjustment part, limit part and positioning pin, the overall length adjustment operation of the spiral can be achieved while ensuring the normal function of the bolt to meet the special usage requirements of the user. At the same time, all components of the bolt can be disassembled and processed separately, which is not only convenient for subsequent installation and disassembly, but also conducive to the subsequent processing of the product, ensuring the subsequent processing and production of the length-adjustable bolt, and facilitating the promotion and use of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a front view structural schematic diagram of the utility model;

[0021] Figure 2 This utility model Figure 1 Schematic diagram of the three-dimensional structure;

[0022] Figure 3 This utility model Figure 1 A schematic diagram of a three-dimensional cross-sectional structure;

[0023] Figure 4 This utility model Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0024] The following are the descriptions of the reference numerals:

[0025] 1. Hexagonal screw head; 2. Core rod; 21. Round rod; 22. Square rod; 23. First threaded hole; 24. Anti-rotation protrusion; 3. Sleeve rod; 31. Hollow rod; 32. First thread; 33. Second threaded hole; 34. Slide groove; 4. Adjustment part; 41. Internal screw; 42. Limiting piece; 43. Columnar adjustment seat; 44. Adjustment slot; 5. Limiting part; 51. Columnar limit seat; 52. Second thread; 53. Slotted opener groove; 54. Round hole; 6. Positioning pin. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0027] See also Figure 1-Figure 4As shown, the utility model provides a bolt with adjustable length, including a hexagonal screw head 1, a core rod 2 and an adjusting portion 4; the left end of the core rod 2 is provided with a hexagonal screw head 1, the core rod 2 includes a round rod 21, the left end of the round rod 21 is provided with a square rod 22, the square rod 22 and the middle part of the hexagonal screw head 1 are plugged in, the middle part of the hexagonal screw head 1 is provided with a square slot corresponding to the square rod 22, the square rod 22 and the square slot are installed in coordination, laying a foundation for the connection between the core rod 2 and the hexagonal screw head 1, the square rod 22 and the hexagonal screw head 1 are connected by a positioning pin 6, the middle part of the round rod 21 is provided with a first threaded hole 23 with an opening facing right, and the right end of the round rod 21 is provided with two symmetrically distributed anti-rotation protrusions 24, which realize the connection between the core rod 2 and the hexagonal screw head 1, and provide the core rod 2 with a plurality of screw holes 23, 24 and 26. To lay the foundation for the connection between the sleeve rod 3 and the adjusting part 4, a sleeve rod 3 is provided at the right end of the core rod 2, and the sleeve rod 3 includes a hollow rod 31, and the hollow rod 31 is sleeved on the outer side of the round rod 21. A first thread 32 is provided on the outer side of the hollow rod 31, and a second threaded hole 33 is provided at the right end of the inner part of the hollow rod 31. The second threaded hole 33 coincides with the inner center line of the hollow rod 31, and the diameter of the second threaded hole 33 is larger than the inner diameter of the hollow rod 31. The hollow rod 31 and the anti-rotation protrusion 24 are slidably connected to realize the installation between the sleeve rod 3 and the core rod 2, and the sliding connection between the sleeve rod 3 and the core rod 2 is ensured. A slide groove 34 corresponding to the anti-rotation protrusion 24 is provided on the hollow rod 31, and the anti-rotation protrusion 24 and the slide groove 34 are installed in coordination, laying the foundation for the installation between the sleeve rod 3 and the core rod 2.

[0028] See also Figure 1-Figure 4 As shown, the adjusting portion 4 is connected to the right end of the core rod 2, and the adjusting portion 4 includes an inner screw 41. The left end of the inner screw 41 is matched with the first threaded hole 23 for installation. A limiting plate 42 is arranged at the right end of the inner screw 41. The outer diameter of the limiting plate 42 is larger than the inner diameter of the hollow rod 31, and the outer diameter of the limiting plate 42 is smaller than the diameter of the second threaded hole 33, so as to limit the inner screw 41 and prevent the inner screw 41 from moving left and right with the core rod 2 after the limiting portion 5 is installed. A columnar adjusting seat 43 is arranged at the right end of the limiting plate 42, and an adjusting slot is arranged in the middle of the right end of the columnar adjusting seat 43. 44, realize the connection between the adjusting part 4 and the right end of the core rod 2, the right end of the adjusting part 4 is provided with a limiting part 5, the limiting part 5 includes a columnar limiting seat 51, the outer side of the columnar limiting seat 51 is provided with a second thread 52 adapted to the second threaded hole 33, the middle part of the columnar limiting seat 51 is provided with a circular hole 54 corresponding to the columnar adjusting seat 43, the columnar adjusting seat 43 extends into the circular hole 54, the right end of the columnar limiting seat 51 is provided with a slotted opener groove 53, to realize the connection and installation between the limiting part 5 and the right end of the sleeve rod 3, and to realize the limitation of the right end of the adjusting part 4.

[0029] In one embodiment of the utility model, a length-adjustable bolt of the above structure is used. During assembly, the square rod 22 of the core rod 2 is inserted into the hollow rod 31 from the right end of the sleeve rod 3, and the anti-rotation protrusion 24 and the slide groove 34 are installed in coordination. At this time, no relative rotation occurs between the core rod 2 and the sleeve rod 3.

[0030] Then the square rod 22 of the core rod 2 is inserted into the square slot in the middle of the hexagonal screw head 1, and then the hexagonal screw head 1 and the core rod 2 are riveted together by the positioning pin 6.

[0031] Then hold the core rod 2 and pull it to the leftmost end of the hollow rod 31, and connect the left end of the inner screw 41 and the right end of the core rod 2 through the cooperation between the inner screw 41 and the first threaded hole 23. When the limiting plate 42 at the left end of the inner screw 41 extends into the second threaded hole 33 and is located at the leftmost end of the second threaded hole 33, stop turning the inner screw 41, and then through the cooperation of the second thread 52 on the outer side of the columnar limiting seat 51 and the second threaded hole 33, the columnar limiting seat 51 can be installed at the leftmost end of the hollow rod 31. This operation can be completed with the help of a slotted opener groove 53 and an opener. When the columnar limiting seat 51 is immersed in the second threaded hole 33, it stops. At this time, the columnar adjustment seat 43 extends into the circular hole 54 in the middle of the columnar limiting seat 51. In this way, the overall assembly operation of the length-adjustable bolt can be completed.

[0032] When in use, the columnar adjustment seat 43 can be rotated by cooperating with the external opener through the adjustment slot 44 on the columnar adjustment seat 43. The rotation of the columnar adjustment seat 43 drives the limit plate 42 to rotate. The rotation of the limit plate 42 drives the inner screw 41 to rotate. The rotation of the inner screw 41 will drive the core rod 2 to move left or right under the sliding limit of the anti-rotation protrusion 24 and the slide groove 34. At this time, the round rod 21 of the core rod 2 extends into or out of the sleeve rod 3, thereby completing the length adjustment operation of the bolt.

[0033] It is worth noting that the sum of the length of the columnar limiting seat 51 and the thickness of the limiting plate 42 is preferably smaller than the depth of the second threaded hole 33 to prevent the columnar limiting seat 51 from being tightly pressed against the limiting plate 42 and ensure the normal rotation of the limiting plate 42.

[0034] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A bolt with adjustable length, characterized in that: It comprises a hexagonal screw head (1), a core rod (2) and an adjustment part (4); The left end of the core rod (2) is provided with a hexagonal screw head (1), and the right end of the core rod (2) is provided with a sleeve rod (3); The adjusting portion (4) is connected to the right end of the core rod (2), and a limiting portion (5) is provided at the right end of the adjusting portion (4).

2. A length-adjustable bolt according to claim 1, characterized in that: The core rod (2) comprises a round rod (21), a square rod (22) is arranged at the left end of the round rod (21), the square rod (22) is plugged into the middle of the hexagonal screw head (1), the square rod (22) and the hexagonal screw head (1) are connected via a positioning pin (6), a first threaded hole (23) with an opening facing right is arranged at the middle of the round rod (21), and two symmetrically distributed anti-rotation protrusions (24) are arranged at the right end of the round rod (21).

3. A length-adjustable bolt according to claim 2, characterized in that: A square slot corresponding to the square rod (22) is provided in the middle of the hexagonal screw head (1), and the square rod (22) and the square slot are mounted in cooperation.

4. A length-adjustable bolt according to claim 2, characterized in that: The sleeve rod (3) comprises a hollow rod (31), the hollow rod (31) being sleeved on the outside of the round rod (21), the outside of the hollow rod (31) being provided with a first thread (32), the right end of the hollow rod (31) being provided with a second threaded hole (33), the second threaded hole (33) and the inner center line of the hollow rod (31) being coincident, the diameter of the second threaded hole (33) being larger than the inner diameter of the hollow rod (31), and the hollow rod (31) being slidably connected to the anti-rotation protrusion (24).

5. A length-adjustable bolt according to claim 4, characterized in that: The hollow rod (31) is provided with a slide groove (34) corresponding to the anti-rotation protrusion (24), and the anti-rotation protrusion (24) and the slide groove (34) are mounted in coordination.

6. A length-adjustable bolt according to claim 4, characterized in that: The adjusting portion (4) comprises an inner screw (41), the left end of the inner screw (41) being mounted in cooperation with the first threaded hole (23), the right end of the inner screw (41) being provided with a limiting plate (42), the right end of the limiting plate (42) being provided with a columnar adjusting seat (43), and the middle part of the right end of the columnar adjusting seat (43) being provided with an adjusting slot (44).

7. A length-adjustable bolt according to claim 6, characterized in that: The outer diameter of the limiting plate (42) is greater than the inner diameter of the hollow rod (31), and the outer diameter of the limiting plate (42) is smaller than the diameter of the second threaded hole (33).

8. The length-adjustable bolt according to claim 6, characterized in that: The limiting portion (5) comprises a columnar limiting seat (51), the outer side of the columnar limiting seat (51) is provided with a second thread (52) adapted to the second threaded hole (33), the middle part of the columnar limiting seat (51) is provided with a circular hole (54) corresponding to the columnar adjustment seat (43), the columnar adjustment seat (43) extends into the circular hole (54), and the right end of the columnar limiting seat (51) is provided with a slotted opener groove (53).

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