A structure for effectively preventing loosening of a bolt installed in a counterbore

Abstract

The utility model provides a structure is prevented loose to the bolt of effective counterbore installation, its characterized in that: lower part has threaded hole, upper part has the through -hole and threaded counterbore of intercommunication, threaded counterbore includes threaded counterbore non -threaded section and threaded counterbore threaded section, threaded counterbore diameter is greater than the through -hole, the bolt passes through the through -hole on the upper part, is screwed in the threaded hole of lower part, the head of bolt is located in the threaded counterbore on the upper part, the screw plug is screwed and is installed in threaded counterbore, and the head of bolt is pressed tightly, and the location that has the punch -riveting area of screw plug and threaded counterbore threaded connection, the utility model discloses, through the anti -loose structure, the bolt of effective counterbore installation is prevented loose.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine gearbox structure, specifically a structure that effectively prevents loosening of bolts installed in countersunk holes. Background Technology

[0002] Due to its advantages such as being pollution-free and having low construction costs, wind power generation has experienced rapid development in recent years.

[0003] Most components of a wind turbine gearbox are assembled using bolts. In areas with limited space or where interference must be avoided, countersunk bolts are often used, meaning the bolt head is recessed into the component after installation. Wind turbine gearboxes typically operate on wind turbines for ten, twenty years, or even longer, and their remote locations make inspection and maintenance inconvenient. If the connecting bolts loosen and fail, it often goes undetected, leading to more serious consequences. Therefore, reliable bolt loosening mechanisms are essential.

[0004] Existing technology for countersunk bolts involves applying thread-locking adhesive to the threaded portion to prevent loosening.

[0005] However, with adhesive application, the coverage of the adhesive cannot be checked after installation, and the adhesive is prone to failure and loosening under prolonged vibration. Utility Model Content

[0006] This utility model provides an effective structure for preventing loosening of bolts installed in countersunk holes. Its purpose is to overcome the shortcomings of the prior art. Through the anti-loosening structure of this utility model, the bolts installed in countersunk holes can be effectively prevented from loosening.

[0007] The technical solution adopted by this utility model to solve its technical problem is: A structure for effectively preventing loosening of bolts installed in countersunk holes, characterized in that: The lower part has a threaded hole; The upper part has a through hole and a threaded countersunk hole. The threaded countersunk hole includes a threadless section and a threaded section. The diameter of the threaded countersunk hole is larger than that of the through hole. The bolt passes through the through hole on the upper part and is screwed into the threaded hole on the lower part; The head of the bolt is located inside the countersunk hole in the upper part; The screw plug is installed inside the threaded countersunk hole to tighten the bolt head, and there is a riveting area at the threaded connection position between the screw plug and the threaded countersunk hole.

[0008] The lower and upper parts are assembled together by multiple sets of bolts.

[0009] The threaded holes of the lower part are evenly distributed around its circumference.

[0010] The height of the unthreaded section at the bottom of the countersunk hole is less than the height of the bolt head.

[0011] The advantages of this utility model are: 1. Simple structure, easy to use, and wide range of applications; 2. Riveting prevents the screw plug from loosening, and the screw plug is used to tighten the bolt to prevent the bolt installed in the countersunk hole from loosening, making the anti-loosening more reliable. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a front view of the present utility model; Figure 2 for Figure 1 AA section view; Figure 3 This is a cross-sectional view of the rubber column. Detailed Implementation

[0014] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort. To facilitate understanding of this utility model, a more detailed description of this utility model will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0015] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] A structure for effectively preventing loosening of countersunk bolts (see...) Figure 1 , Figure 2 Includes: Lower part 1, Upper part 2 ( Figure 3 ), 3 bolts, 4 plugs.

[0017] The lower part 1 has several threaded holes 11 evenly distributed around its circumference.

[0018] The upper part 2 has a through hole 201 and a threaded countersunk hole 202. The threaded countersunk hole 202 includes a threadless section 2021 and a threaded section 2022. The diameter of the threaded countersunk hole 202 is larger than that of the through hole 201.

[0019] Bolt 3 passes through the through hole 201 on the upper part 2 and is screwed into the threaded hole 11 of the lower part 1. It is tightened according to the torque requirements. The lower part 1 and the upper part 2 are assembled together by multiple sets of bolts 3.

[0020] After tightening, the head of bolt 3 is located in the threaded countersunk hole 202 on the upper part 2. The height H of the unthreaded section 2021 of the threaded countersunk hole at the bottom of the threaded countersunk hole 202 is less than the height h of the head of bolt 3.

[0021] Next, the plug 4 is screwed into the countersunk hole 202, and the head of the bolt 3 is tightened. The plug 4 can be a standard part or a custom part selected according to the size of the countersunk hole 202. After the plug 4 tightens the head of the bolt 3, the threaded connection position A between the plug 4 and the countersunk hole 202 is riveted to form a riveting area, which breaks the thread and fixes the plug 4 firmly to prevent it from loosening.

[0022] When bolt 3 tends to loosen due to gearbox vibration or other reasons, lower part 1 is fixed by multiple sets of bolts 3 and will not rotate. Bolt 3, under the influence of the connecting threads with lower part 1, will tend to rotate relative to lower part 1 and will tend to move outward. At this time, the plug 4 presses the bolt 3, preventing it from moving outward and thus preventing bolt 3 from loosening.

[0023] This utility model patent presents an effective anti-loosening structure for bolts installed in countersunk holes. The structure is simple, easy to operate, and provides reliable anti-loosening protection. The countersunk hole for bolt installation is made into a threaded countersunk hole, with the height of the unthreaded portion at the bottom of the countersunk hole being less than the height of the bolt head. The plug can be a standard part or custom-made according to the size of the threaded countersunk hole. After the plug is installed in place, the bolt is tightened, and the threaded portion of the plug is punched and riveted to prevent loosening of the plug and bolt, thus making the connection of the parts more reliable.

[0024] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A structure for effectively preventing loosening of bolts installed in countersunk holes, characterized in that: The lower part has a threaded hole; the upper part has a through hole and a threaded countersunk hole, the threaded countersunk hole includes a threadless section and a threaded section, the diameter of the threaded countersunk hole is larger than that of the through hole; the bolt passes through the through hole on the upper part and is screwed into the threaded hole of the lower part; the head of the bolt is located in the threaded countersunk hole on the upper part; the screw plug is screwed into the threaded countersunk hole to press the bolt head, and there is a riveting area at the threaded connection position between the screw plug and the threaded countersunk hole.

2. The structure for effectively preventing loosening of countersunk bolts as described in claim 1, characterized in that: The lower and upper parts are assembled together by multiple sets of bolts.

3. The structure for effectively preventing loosening of bolts installed in countersunk holes as described in claim 1, characterized in that: The threaded holes of the lower part are evenly distributed around its circumference.

4. The structure for effectively preventing loosening of bolts installed in countersunk holes as described in claim 1, characterized in that: The height of the unthreaded section at the bottom of the countersunk hole is less than the height of the bolt head.

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