Thread-variable bolt with left-hand thread and right-hand thread
By designing the transformed bolts with left and right rotary threads, the problem that existing bolts cannot withstand shear and tensile forces at the same time is solved, and the shear and tensile forces are achieved at the same time, which improves the firmness and load-bearing capacity of the bolts.
Patent Information
- Application Number
- CN202422381386.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-29
AI Technical Summary
Existing dental bolts cannot withstand shear and tensile forces at the same time, resulting in their insolidity.
A change-type bolt with left and right rotating threads is designed, including an upper base bolt and a lower base bolt. The two are connected by a connection part. The outer surface of the upper base bolt is equipped with a right rotating thread, and the outer surface of the lower base bolt is equipped with a left rotating thread. The cross-sectional width is different. Through scraping, cold extrusion or stamping process, the cross-section of the connecting part is isosceles trapezoid, achieving tight sealing.
The bolts are realized to bear shear and tensile forces at the same time, maintain firmness and tightness, and improve load-bearing capacity.
Smart Images
Figure CN223136655U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of variable thread type bolts, in particular to a variable thread type bolt with left - hand and right - hand threads. Background Technique
[0002] A variable thread type bolt is a bolt with a special design, having different specifications of thread roots (thread types) in the length direction of the bolt. Usually, two different specifications are compressed into one bolt. Such a design enables the bolt to bear different loads at different parts, thus promoting a more firm and reliable fastening of the bolt.
[0003] However, the inventor found in actual applications that: when the existing variable pressure type bolts are tightened, they cannot bear shear force and tensile force simultaneously, resulting in the problem of being not firm. Therefore, we propose a variable thread type bolt with left - hand and right - hand threads. Content of the Utility Model
[0004] (1) Technical Problems to be Solved
[0005] Aiming at the deficiencies of the prior art, the utility model provides a variable thread type bolt with left - hand and right - hand threads, which has the advantages of being able to bear shear force and tensile force simultaneously and maintaining its firmness, and solves the problem that the existing variable pressure type bolts cannot bear shear force and tensile force simultaneously when tightened, resulting in being not firm.
[0006] (2) Technical Solutions
[0007] To achieve the purpose of being able to bear shear force and tensile force simultaneously and maintaining its firmness, the utility model provides the following technical solutions: a variable thread type bolt with left - hand and right - hand threads, including: an upper base bolt;
[0008] An engaging part, which is arranged on the upper base bolt;
[0009] A lower base bolt, which is arranged at one end of the engaging part away from the upper base bolt.
[0010] As a preferred technical solution of the utility model, the outer surface of the upper base bolt is provided with right - hand threads to facilitate the fastening of the upper base bolt.
[0011] As a preferred technical solution of the utility model, the outer surface of the lower base bolt is provided with left - hand threads to facilitate the fastening of the lower base bolt.
[0012] As a preferred technical solution of the utility model, the cross - sectional width of the upper base bolt is greater than the cross - sectional width of the lower base bolt, so that the width of the right - hand threads on the upper base bolt is greater than the width of the left - hand threads on the lower base bolt, and further enables the bolt to bear shear force and tensile force simultaneously, and can ensure its firmness and fastening property.
[0013] As a preferred technical solution of the present utility model, the upper base bolt, the connecting part and the lower base bolt are integrally designed for easy processing;
[0014] The right-handed thread and the left-handed thread can be processed by scraping process (a processing method for rotating metal bars or pipes, using tools such as scale calipers to check its accuracy, and precise tooth profiles and dimensions can be manufactured), or by cold extrusion process (which can change the shape and size of materials without adding too much heating, and at the same time, through different extrusion head dies, various deformed bolts with different sizes and tooth profiles can be created) and stamping process (using a manipulator to operate a stamping die to press metal materials into a specific shape, this processing is fast and suitable for mass production).
[0015] As a preferred technical solution of the present utility model, the cross-section of the connecting part is in the shape of an isosceles trapezoid. Since the connecting part with an isosceles trapezoid cross-section can achieve a tighter seal between the upper base bolt and the lower base bolt, the bolt can withstand higher tensile strength and shear strength, so as to ensure that the bearing capacity of the connecting part is stronger.
[0016] (III) Beneficial effects
[0017] Compared with the prior art, the present utility model provides a variable tooth profile bolt with left and right hand threads, having the following beneficial effects:
[0018] 1. For the variable tooth profile bolt with left and right hand threads, when the variable tooth profile bolt is pressed into the hole, since the width of the right-handed thread on the upper base bolt is greater than the width of the left-handed thread on the lower base bolt, when the variable tooth profile bolt is tightened, at this time the upper base bolt bears high pressure and the lower base bolt bears low pressure. This design enables the bolt to bear shear force and tensile force simultaneously, and can ensure its firmness and tightness, so that it can bear shear force and tensile force simultaneously and maintain its firmness.
[0019] 2. For the variable tooth profile bolt with left and right hand threads, by designing the cross-section of the connecting part in the shape of an isosceles trapezoid, a tighter seal can be achieved between the upper base bolt and the lower base bolt, so that the bolt can withstand higher tensile strength and shear strength, so as to ensure that the bearing capacity of the connecting part is stronger. 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 description in the embodiments will be briefly introduced below. 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. Among them:
[0021] Figure 1This is a three-dimensional schematic diagram of the overall structure of the present utility model;
[0022] Figure 2 This is a front view schematic diagram of the overall structure of the present utility model.
[0023] In the figure: 11, upper base bolt; 111, right-handed thread; 12, connecting part; 13, lower base bolt; 133, left-handed thread. Specific embodiments
[0024] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0025] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0026] At the same time, the meaning of "and / or" or "and / or" that appears throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time.
[0027] In addition, the descriptions such as "first" and "second" in the present utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0028] Refer to Figure 1-2 , a variable thread type bolt with left and right hand threads is provided, including: an upper base bolt 11;
[0029] A connecting part 12, and the connecting part 12 is arranged on the upper base bolt 11;
[0030] A lower base bolt 13, and the lower base bolt 13 is arranged at one end of the connecting part 12 away from the upper base bolt 11.
[0031] The outer surface of the upper base bolt 11 is provided with a right-handed thread 111 to facilitate the fastening of the upper base bolt 11.
[0032] The outer surface of the lower base bolt 13 is provided with a left-handed thread 133 to facilitate the fastening of the lower base bolt 13.
[0033] The cross-sectional width of the upper base bolt 11 is greater than that of the lower base bolt 13, so that the width of the right-handed thread 111 on the upper base bolt 11 is greater than the width of the left-handed thread 133 on the lower base bolt 13. Thus, the bolt can bear both shear force and tensile force, and its firmness and fastening performance can be ensured.
[0034] The upper base bolt 11, the connecting part 12 and the lower base bolt 13 are integrally designed to facilitate their processing;
[0035] The right-handed thread 111 and the left-handed thread 133 can be processed by scraping process (a processing method for rotating metal bars or pipes, using tools such as scale calipers to check its accuracy, and precise tooth profiles and dimensions can be manufactured), or by cold extrusion process (which can change the shape and dimensions of materials without adding too much heat, and at the same time, through different extrusion head dies, various deformed bolts with different sizes and tooth profiles can be created) and stamping process (using a manipulator to operate a stamping die to press metal materials into a specific shape, this processing is fast and suitable for mass production).
[0036] The cross-section of the connecting part 12 is in the shape of an isosceles trapezoid. In application, due to the connecting part 12 with a cross-section in the shape of an isosceles trapezoid, a tighter seal can be achieved between the upper base bolt 11 and the lower base bolt 13, enabling the bolt to bear higher tensile strength and shear strength, so as to ensure that the bearing capacity of the connecting part 12 is stronger.
[0037] In the actual use process, when the variable tooth profile bolt is pressed into the hole, since the width of the right-handed thread 111 on the upper base bolt 11 is greater than the width of the left-handed thread 133 on the lower base bolt 13, when the variable tooth profile bolt is tightened, at this time, the upper base bolt 11 bears high pressure and the lower base bolt 13 bears low pressure. This design enables the bolt to bear both shear force and tensile force, and can ensure its firmness and fastening performance, so that it can bear both shear force and tensile force and maintain its firmness. This device can not only bear both shear force and tensile force, but also maintain its firmness.
[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.
Claims
1. A variable thread type bolt with left - hand and right - hand threads, characterized in that: Including: Upper base bolt (11); Connecting part (12), which is arranged on the upper base bolt (11); Lower base bolt (13), which is arranged on one end of the connecting part (12) away from the upper base bolt (11); A right-handed thread (111) is provided on the outer surface of the upper base bolt (11); A left-handed thread (133) is provided on the outer surface of the lower base bolt (13); The cross-sectional width of the upper base bolt (11) is greater than the cross-sectional width of the lower base bolt (13).
2. The variable thread profile bolt with left - hand and right - hand threads according to claim 1, characterized in that: The upper base bolt (11), the connecting part (12) and the lower base bolt (13) are of an integral design; The right-handed thread (111) and the left-handed thread (133) can be manufactured by a scraping process.
3. A variable thread type bolt with left - hand and right - hand threads according to claim 1, characterized in that: The cross-section of the connecting part (12) is in the shape of an isosceles trapezoid.