A locking mechanism for a new energy automobile anti-loose fastener

Abstract

The utility model relates to the field of new energy automobile anti-loose fastener, specifically discloses a locking mechanism for new energy automobile anti-loose fastener, including hexagon sleeve, be equipped with spring anti -loose mechanism on the hexagon sleeve, be equipped with mechanical interlocking locking mechanism on the spring anti -loose mechanism, through the synergism of anti -loose torsional spring and mechanical interlocking locking mechanism, form " elastic pre -tightening + rigid limit " dual anti -loose mechanism, and anti -loose torsional spring offsets dynamic loosening torque through sustained elastic force, avoid the gap between the thread appearance, the interlocking piece is fixed bolt head through mechanical interlocking, and the rotation trend of its loosening direction is blocked, and the both are complementary and synergistic, solve the problem of single elastic anti -loose under the strong vibration force attenuation, and make up the defect that single mechanical interlocking lacks the buffer, realize long -term stable locking under the complex working condition of new energy automobile, significantly improve fastener connection reliability, reduce the security risk caused by loosening.

Description

Technical Field

[0001] This utility model relates to the field of anti-loosening fasteners for new energy vehicles, specifically a locking mechanism for anti-loosening fasteners in new energy vehicles. Background Technology

[0002] Anti-loosening fasteners are core components connecting critical parts of the power system, chassis, and body of new energy vehicles. Their locking reliability directly affects vehicle driving safety, component lifespan, and performance stability. New energy vehicles operate in complex environments, constantly facing conditions such as motor vibration, road bumps, and temperature fluctuations. Traditional fasteners are prone to loosening of threaded connections due to continuous vibration, leading to component displacement, abnormal noise, or even functional failure.

[0003] Existing anti-loosening fasteners for new energy vehicles still have significant shortcomings in practical applications: the anti-loosening methods are singular and the reliability is limited. Traditional anti-loosening methods mostly rely on single structures such as spring washers and lock nuts, which only rely on friction or elastic preload to prevent loosening. Under high-frequency vibration conditions, the anti-loosening method is prone to failure due to force attenuation and cannot resist continuous loosening torque for a long time. Utility Model Content

[0004] The purpose of this utility model is to provide a locking mechanism for anti-loosening fasteners in new energy vehicles, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a locking mechanism for anti-loosening fasteners in new energy vehicles, comprising a hexagonal threaded sleeve, wherein the hexagonal threaded sleeve is provided with a spring anti-loosening mechanism, and the spring anti-loosening mechanism is provided with a mechanical locking mechanism.

[0006] As a preferred embodiment of this utility model, the inner wall of the hexagonal threaded sleeve is provided with an internal thread, and the top and bottom of the hexagonal threaded sleeve are provided with positioning rings.

[0007] As a preferred embodiment of this utility model, the spring anti-loosening mechanism includes a connecting sleeve, one end of which is connected to the positioning ring at the top of the hexagonal screw sleeve. An anti-loosening torsion spring is provided inside the connecting sleeve. An L-shaped adjustment groove is provided on the upper part of the connecting sleeve, and a positioning groove is provided on the lower part of the connecting sleeve. The bottom end of the anti-loosening torsion spring extends into the positioning groove and is fixed by the positioning groove. The upper end of the anti-loosening torsion spring extends into the L-shaped adjustment groove.

[0008] As a preferred embodiment of this utility model, the mechanical locking mechanism includes a locking ring and a locking sleeve. The locking ring includes a mounting ring, the bottom end of which is connected to the top end of the connecting sleeve. An annular groove is formed inside the mounting ring, and the inner wall of the annular groove near the outer end is provided with an internal thread. Several guide grooves are formed inside the annular groove, extending towards the inner ring of the mounting ring. A return spring is connected to one end of the guide groove near the inner ring of the mounting ring. Several locking through slots are formed on the inner ring of the mounting ring corresponding to the positions of the guide grooves. A guide member is movably disposed in the guide groove, and the guide member is connected to the other end of the return spring. A locking member is connected to the top of the guide member, and the size of the locking member corresponds to the locking through slot.

[0009] As a preferred embodiment of this utility model, the outer surface of the upper part of the locking sleeve is provided with a twisting anti-slip texture, the outer surface of the lower part of the locking sleeve is provided with an external thread, the external thread and the internal thread are connected by two threads, and the bottom end of the locking sleeve corresponds to the top end of the snap-fit ​​component.

[0010] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: 1. The anti-loosening torsion spring structure with adjustable preload has the bottom end fixed by the positioning groove, and the upper end can move along the L-shaped adjustment groove to adjust the torsion preload. The diameter of the spring can be adjusted according to the vibration. It can suppress the loosening trend in the initial tightening stage and provide basic elastic anti-loosening protection for threaded connections. 2. The mechanical locking mechanism features a snap-fit ​​design. When the locking sleeve rotates and descends, it pushes the snap-fit ​​component out of the snap-fit ​​slot along the guide groove, forming a rigid limit by tightly abutting against the side surface of the bolt head. This mechanically restricts the bolt's rotational freedom, preventing the bolt from rotating in the loosening direction even under severe bumps or long-term vibration. The return spring, in conjunction with the guide groove, ensures smooth operation of the snap-fit ​​component, adapting to the snap-fit ​​requirements of various bolt head sizes. It can be operated without special tools, improving assembly efficiency. 3. Through the synergistic action of the anti-loosening torsion spring and the mechanical locking mechanism, a dual anti-loosening mechanism of "elastic pre-tightening + rigid limiting" is formed. The anti-loosening torsion spring counteracts the dynamic loosening torque with continuous elastic force, preventing gaps between threads; the locking component fixes the bolt head through mechanical locking, blocking the rotational tendency of its loosening direction. The two complement each other and work together to solve the problem of force attenuation under strong vibration with single elastic anti-loosening and to make up for the lack of buffering in single mechanical locking. This achieves long-term stable locking under the complex working conditions of new energy vehicles, significantly improving the reliability of fastener connections and reducing safety hazards caused by loosening. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of this utility model; Figure 2 This is a half-section front view of the connecting sleeve and the snap-fit ​​locking ring of this utility model; Figure 3 This is a schematic diagram of the overall half-section front view of the present invention; Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 This is a schematic diagram of the partial sectional three-dimensional structure of the connecting sleeve of this utility model; Figure 6 This is a schematic diagram of the three-dimensional structure of the present invention without the locking sleeve; Figure 7 This is a three-dimensional structural diagram of the locking sleeve of this utility model; Figure 8 This is a top view of the installation ring structure in the unengaged state of this utility model; Figure 9 This is a top view of the installation ring in the snap-fit ​​state of this utility model.

[0012] Explanation of reference numerals in the attached drawings: Hexagonal screw sleeve 1, internal thread one 101, positioning ring 102, spring anti-loosening mechanism 2, connecting sleeve 201, anti-loosening torsion spring 202, L-shaped adjusting groove 203, positioning groove 204, mechanical snap-fit ​​locking mechanism 3, snap-fit ​​locking ring 301, locking sleeve 302, installation ring 303, annular groove 304, internal thread two 305, guide groove 306, return spring 307, snap-fit ​​through groove 308, guide component 309, snap-fit ​​component 310, anti-slip texture for twisting 311, external thread 312. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1 - Figure 9 This utility model provides a technical solution: A locking mechanism for anti-loosening fasteners in new energy vehicles includes a hexagonal screw sleeve 1, a spring anti-loosening mechanism 2 on the hexagonal screw sleeve 1, and a mechanical snap-locking mechanism 3 on the spring anti-loosening mechanism 2. The inner wall of the hexagonal threaded sleeve 1 is provided with an internal thread 101, and the top and bottom of the hexagonal threaded sleeve 1 are provided with positioning rings 102; The spring anti-loosening mechanism 2 includes a connecting sleeve 201. One end of the connecting sleeve 201 is connected to the positioning ring 102 on the top of the hexagonal screw sleeve 1. An anti-loosening torsion spring 202 is provided inside the connecting sleeve 201. An L-shaped adjustment groove 203 is provided on the upper part of the connecting sleeve 201, and a positioning groove 204 is provided on the lower part of the connecting sleeve 201. The bottom end of the anti-loosening torsion spring 202 extends into the positioning groove 204 and is fixed by the positioning groove 204. The upper end of the anti-loosening torsion spring 202 extends into the L-shaped adjustment groove 203. The torsional preload of the anti-loosening torsion spring 202 can be adjusted by moving the position of the upper end of the anti-loosening torsion spring 202 in the L-shaped adjustment groove 203. The mechanical locking mechanism 3 includes a locking ring 301 and a locking sleeve 302. The locking ring 301 includes a mounting ring 303, the bottom end of which is connected to the top end of the connecting sleeve 201. An annular groove 304 is formed in the mounting ring 303. An internal thread 305 is provided on the inner wall of the annular groove 304 near the outer end. Several guide grooves 306 are formed in the annular groove 304, extending into the inner ring of the mounting ring 303. A return spring 307 is connected to one end of the guide groove 306 near the inner ring of the mounting ring 303. Several locking through grooves 308 are formed in the inner ring of the mounting ring 303 corresponding to the guide grooves 306. A guide member 309 is movably arranged in the guide groove 306. The guide member 309 is connected to the other end of the return spring 307. A locking member 310 is connected to the top of the guide member 309. The size of the locking member 310 corresponds to that of the locking through groove 308.

[0015] The upper outer surface of the locking sleeve 302 is provided with a twisting anti-slip texture 311, and the lower outer surface of the locking sleeve 302 is provided with an external thread 312. The external thread 312 is threadedly connected with the internal thread 305. The bottom end of the locking sleeve 302 corresponds to the top end of the snap-fit ​​member 310. As the locking sleeve 302 rotates along the annular groove 304, when the locking sleeve 302 descends, the bottom end of the locking sleeve 302 pushes the snap-fit ​​member 310 to move along the guide groove 306, and causes the snap-fit ​​member 310 to extend out of the snap-fit ​​groove 308.

[0016] The principle and usage process of this utility model: The operator first moves the top of the anti-loosening torsion spring 202 to the downward slot of the L-shaped adjusting groove 203, locking the anti-loosening torsion spring 202 into the open, unlocked state. Then, the operator holds the hexagonal threaded sleeve 1 and aligns it with the bolt of the component to be fixed on the new energy vehicle, allowing the bolt head to pass sequentially through the locking sleeve 302, the locking ring 301, and the connecting sleeve 201 until the external thread of the bolt contacts the internal thread 101 of the hexagonal threaded sleeve 1. Using a wrench to hold the hexagonal structure of the hexagonal threaded sleeve 1, the operator rotates the hexagonal threaded sleeve 1 clockwise. Utilizing the meshing transmission between the internal thread 101 and the external thread of the bolt, the locking mechanism is tightened to the surface of the component to be fixed, causing the positioning ring 102 at the bottom of the hexagonal threaded sleeve 1 to fit against the surface of the component, completing the initial tightening. Then, the top of the anti-loosening torsion spring 202 is moved away from the downward slot of the L-shaped adjustment groove 203, so that the anti-loosening torsion spring 202 is in the reset locked state, and the elastic force initially suppresses the relative loosening tendency between the bolt and the hexagonal threaded sleeve 1.

[0017] After initial tightening, the operator holds the anti-slip groove 311 on the upper part of the locking sleeve 302 and rotates the locking sleeve 302 clockwise. Since the external thread 312 of the locking sleeve 302 is threadedly connected to the internal thread 305 of the locking ring 301, the locking sleeve 302 moves downwards along the annular groove 304 during rotation. As the locking sleeve 302 descends, its bottom end gradually contacts and presses against the top of the locking member 310, pushing the locking member 310 to drive the guide member 309 to move along the guide groove 306 towards the inner ring of the mounting ring 303, compressing the return spring 307. When the locking sleeve 302 rotates to the preset locking position, the locking member 310 fully extends out of the locking groove 308 and tightly abuts against the side surface of the bolt head, forming a mechanical locking limit and preventing the bolt from rotating in the loosening direction.

[0018] At this point, the locking mechanism and the bolt form a double anti-loosening fixation: on the one hand, the anti-loosening torsion spring 202 continuously acts between the connecting sleeve 201 and the bolt through its own torsional preload, generating a reverse torque to counteract the loosening torque generated by the bolt due to vibration; on the other hand, the locking member 310 of the mechanical locking mechanism 3 rigidly engages with the bolt head, mechanically restricting the bolt's rotational freedom and preventing relative displacement during vibration. The synergistic effect of the double anti-loosening structure ensures that the connection between the locking mechanism and the bolt remains stable under complex conditions such as vibration and bumps during the operation of new energy vehicles, meeting the anti-loosening requirements of fasteners for new energy vehicles.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A locking mechanism for anti-loosening fasteners in new energy vehicles, characterized in that: It includes a hexagonal threaded sleeve (1), the hexagonal threaded sleeve (1) is provided with a spring anti-loosening mechanism (2), and the spring anti-loosening mechanism (2) is provided with a mechanical locking mechanism (3).

2. The locking mechanism for anti-loosening fasteners in new energy vehicles according to claim 1, characterized in that: The inner wall of the hexagonal threaded sleeve (1) is provided with an internal thread (101), and the top and bottom of the hexagonal threaded sleeve (1) are provided with positioning rings (102).

3. A locking mechanism for anti-loosening fasteners in new energy vehicles according to claim 2, characterized in that: The spring anti-loosening mechanism (2) includes a connecting sleeve (201). One end of the connecting sleeve (201) is connected to the positioning ring (102) at the top of the hexagonal threaded sleeve (1). An anti-loosening torsion spring (202) is provided inside the connecting sleeve (201). An L-shaped adjustment groove (203) is provided on the upper part of the connecting sleeve (201). A positioning groove (204) is provided on the lower part of the connecting sleeve (201). The bottom end of the anti-loosening torsion spring (202) extends into the positioning groove (204) and is fixed by the positioning groove (204). The upper end of the anti-loosening torsion spring (202) extends into the L-shaped adjustment groove (203).

4. A locking mechanism for anti-loosening fasteners in new energy vehicles according to claim 3, characterized in that: The mechanical locking mechanism (3) includes a locking ring (301) and a locking sleeve (302). The locking ring (301) includes a mounting ring (303). The bottom end of the mounting ring (303) is connected to the top end of the connecting sleeve (201). An annular groove (304) is provided in the mounting ring (303). An internal thread (305) is provided on the inner wall of the annular groove (304) near the outer end. Several guide grooves (306) are provided in the annular groove (304). The guide grooves (306) lead into the mounting ring (303). The guide groove (306) extends to one end of the inner ring of the mounting ring (303), and a return spring (307) is connected to it. The inner ring of the mounting ring (303) has several snap-fit ​​slots (308) at the position corresponding to the guide groove (306). A guide member (309) is movably arranged in the guide groove (306). The guide member (309) is connected to the other end of the return spring (307). A snap-fit ​​member (310) is connected to the top of the guide member (309). The size of the snap-fit ​​member (310) corresponds to that of the snap-fit ​​slot (308).

5. A locking mechanism for anti-loosening fasteners in new energy vehicles according to claim 4, characterized in that: The upper outer surface of the locking sleeve (302) is provided with a twisting anti-slip texture (311), and the lower outer surface of the locking sleeve (302) is provided with an external thread (312). The external thread (312) is threadedly connected to the internal thread (305). The bottom end of the locking sleeve (302) corresponds to the top end of the snap fastener (310).

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