Novel slotted bolt

Abstract

The utility model discloses a novel slotted bolt, and relates to the technical field of slotted bolts, the key point of the technical scheme is that the novel slotted bolt comprises a head part and a threaded rod, the peripheral side wall of the threaded rod is provided with at least one oil passing groove extending along the axial direction, and the bottom of the oil passing groove is provided with a U-shaped groove bottom. According to the novel slotted bolt, the hardness of the novel slotted bolt is remarkably improved through the screw rod part of the solid structure, and meanwhile, the oil passing groove extending in the axial direction is formed in the peripheral side wall of the screw rod part, so that the friction force between the novel slotted bolt and an opponent piece is remarkably improved through the oil passing groove with the U-shaped groove bottom and the contraction wall; the purpose of effectively preventing the bolt from loosening in the using process is achieved, and the failure risk of the novel slotted bolt in the using process is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of slotted bolts, and more specifically to a novel slotted bolt. Background Art

[0002] Fasteners have always been known as the "rice of industry". They are mainly used in the automotive industry, maintenance, construction industry, engineering machinery, etc. They are the most widely used basic parts. Fasteners come in a wide variety of specifications, with different performances and uses, and are highly standardized, serialized, and universal. Bolts are the most common fasteners.

[0003] Bolts are a type of fastener consisting of a head and an externally threaded screw. They are used to fasten two parts with through holes. Bolts transfer force from one component to another through the mechanism of torsion force transmission and conversion. When the bolt is screwed into the object being connected, it will generate corresponding pressure to maintain a precise connection between the objects. In the prior art, most oil-through bolts use a straight hole plus a transverse hole design. Since the assembly relies on the mutual squeezing and force transmission between the bolt rod and the hole wall, the transverse hole design may cause the risk of bolt breakage during tightening and assembly, resulting in connection failure. In addition, this type of processing has many complex procedures and needs to be improved. Summary of the invention

[0004] In view of this, the purpose of this application is to provide a new type of slotted bolt to achieve the purpose of improving hardness and anti-loosening performance. The specific scheme is as follows:

[0005] A novel slotted bolt comprises a head and a threaded rod. The outer peripheral side wall of the threaded rod is provided with at least one oil-passing groove extending in the axial direction, and the bottom of the oil-passing groove is provided with a U-shaped groove bottom.

[0006] Preferably: the threaded rod comprises an annular groove section, an external threaded portion and a plug joint which are connected in sequence; the diameter of the plug joint is smaller than the diameter of the external threaded portion, the diameter of the annular groove section is smaller than the diameter of the external threaded portion, and the oil grooves are distributed on the annular groove section, the external threaded portion and the plug joint.

[0007] Preferably, one end of the annular groove section away from the external threaded portion is connected to a tail section, and the diameter of the tail section is greater than the diameter of the external threaded portion.

[0008] Preferably, an abutment ring is provided between the head and the threaded rod, and the diameter of the abutment ring is larger than the diameters of the external threaded portion and the head.

[0009] Preferably, one end of the plug connector away from the external threaded portion is provided with a head chamfer, and both ends of the external threaded portion are provided with thread chamfers.

[0010] Preferably: both sides of the U-shaped groove bottom are connected with shrinkage walls, and the shrinkage walls are located on the annular groove section and the external threaded portion.

[0011] It can be seen from the above scheme that the present application provides a new type of slotted bolt, which has the following beneficial effects: the hardness of the new type of slotted bolt is significantly improved by the solid structure of the screw portion, and at the same time, an oil groove extending axially is arranged on the outer peripheral side wall of the screw portion, so that the oil groove with a U-shaped groove bottom and a contraction wall significantly improves the friction between the new type of slotted bolt and the opponent, thereby achieving the purpose of effectively preventing the bolt from loosening during use, and effectively preventing the risk of failure of the new type of slotted bolt during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of this embodiment.

[0013] Explanation of the reference numerals: 1. head; 2. screw portion; 21. annular groove section; 22. external thread portion; 221. thread chamfer; 23. plug connector; 231. head chamfer; 24. tail section; 3. oil groove; 31. U-shaped groove bottom; 32. contraction wall; 4. abutment ring. DETAILED DESCRIPTION

[0014] In order to make the technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0015] like Figure 1 As shown, a new slotted bolt comprises a head 1 and a threaded rod. At least one oil-passing groove 3 extending in the axial direction is provided on the outer peripheral side wall of the threaded rod, and a U-shaped groove bottom 31 is provided at the bottom of the oil-passing groove 3. Therefore, the hardness of the new slotted bolt is significantly improved by the screw part 2 of the solid structure, and at the same time, the oil-passing groove 3 extending in the axial direction is provided on the outer peripheral side wall of the screw part 2, so that the oil-passing groove 3 with the U-shaped groove bottom 31 can significantly increase the contact area between the new slotted bolt and the counterpart, so as to significantly improve the friction between the new slotted bolt and the counterpart, so as to achieve the purpose of effectively preventing the bolt from loosening during use.

[0016] It should be noted that the threaded rod includes an annular groove section 21, an external threaded portion 22 and a plug joint 23 which are connected in sequence. The diameter of the plug joint 23 is smaller than the diameter of the external threaded portion 22, the diameter of the annular groove section 21 is smaller than the diameter of the external threaded portion 22, and the oil-passing groove 3 is distributed on the annular groove section 21, the external threaded portion 22 and the plug joint 23. In order to achieve effective reinforcement and oil-passing effects, the distribution length of the oil-passing groove 3 on the annular groove section 21 is smaller than the length of the annular groove section 21, and the distribution length on the plug joint 23 is smaller than the length of the plug joint 23. A head chamfer 231 is provided at one end of the plug joint 23 away from the external threaded portion 22, and thread chamfers 221 are provided at both ends of the external threaded portion 22, so that the oil-passing groove 3 is distributed on the plug joint 23 until the upper end is located at the top of the head chamfer 231, thereby preventing the oil-passing groove 3 from affecting the mechanical structural strength of the head chamfer 231 with a smaller diameter.

[0017] At the same time, a shrinkage wall 32 is connected to both sides of the U-shaped groove bottom 31. The shrinkage wall 32 is located on the annular groove section 21 and the external threaded portion 22, so that the new slotted bolt has a significantly increased friction with the counterpart, effectively preventing the new slotted bolt from having a risk of failure during use.

[0018] like Figure 1 As shown, a tail section 24 is connected to one end of the annular groove section 21 away from the external threaded portion 22, and the diameter of the tail section 24 is larger than the diameter of the external threaded portion 22. An abutment ring 4 is provided between the head 1 and the threaded rod to reduce the difficulty of assembling the novel slotted bolt, and the diameter of the abutment ring 4 is larger than the diameters of the external threaded portion 22 and the head 1.

[0019] The new slotted bolt has been heat treated and its material performance grade has reached 8.8. According to the test, the hardness of the new slotted bolt is required to be HRC 25-36 (HV266-355), and the torque is up to 66N.m without breaking. The surface of the new slotted bolt has a protective layer formed by zinc-nickel alloy passivation treatment and sealing treatment.

[0020] In summary, the present application provides a new type of slotted bolt, which significantly improves the hardness of the new type of slotted bolt through a solid structure of the screw portion 2, and at the same time, by arranging an axially extending oil groove 3 on the outer peripheral side wall of the screw portion 2, the oil groove 3 with a U-shaped groove bottom 31 and a contraction wall 32 significantly increases the friction between the new type of slotted bolt and the opponent, so as to achieve the purpose of effectively preventing the bolt from loosening during use, and effectively preventing the risk of failure of the new type of slotted bolt during use.

[0021] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.

[0022] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0023] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A novel slotted bolt, comprising a head (1) and a threaded rod, characterized in that: The outer peripheral side wall of the threaded rod is provided with at least one oil-passing groove (3) extending in the axial direction, and the bottom of the oil-passing groove (3) is provided with a U-shaped groove bottom (31); the threaded rod comprises an annular groove section (21), an external threaded portion (22) and a plug joint (23) connected in sequence; the diameter of the plug joint (23) is smaller than the diameter of the external threaded portion (22), the diameter of the annular groove section (21) is smaller than the diameter of the external threaded portion (22), and the oil-passing grooves (3) are distributed on the annular groove section (21), the external threaded portion (22) and the plug joint (23).

2. A new slotted bolt according to claim 1, characterized in that: One end of the annular groove section (21) away from the external threaded portion (22) is connected to a tail section (24), and the diameter of the tail section (24) is greater than the diameter of the external threaded portion (22).

3. A novel slotted bolt according to claim 1, characterized in that: An abutment ring (4) is provided between the head (1) and the threaded rod, and the diameter of the abutment ring (4) is larger than the diameters of the external threaded portion (22) and the head (1).

4. A novel slotted bolt according to claim 1, characterized in that: One end of the plug connector (23) away from the external threaded portion (22) is provided with a head chamfer (231), and both ends of the external threaded portion (22) are provided with thread chamfers (221).

5. A novel slotted bolt according to claim 1, characterized in that: Both sides of the U-shaped groove bottom (31) are connected with contraction walls (32), and the contraction walls (32) are located on the annular groove section (21) and the external threaded portion (22).

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