Lock bolt structure for automobile chassis
By designing limiting and resetting components, the problem of loosening of automotive chassis bolts under vibration is solved, achieving bolt self-locking and secondary limiting, ensuring connection stability and safety, and facilitating quick disassembly.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-27
AI Technical Summary
Car chassis bolts are prone to loosening under prolonged vibration, affecting the tightness of the connection and driving safety.
The design includes a limit and reset assembly, comprising a guide groove, a limit block, a fixing ring, a moving plate, and a spring. Through the rotation of the nut and the linkage of the limit block, the bolt achieves self-locking and secondary limiting, preventing loosening.
It effectively prevents bolts from loosening, maintains stable preload, improves the reliability and safety of bolted connections, facilitates quick disassembly, and is suitable for bolted connections under complex working conditions.
Smart Images
Figure CN224049530U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile parts, especially relates to a loosening prevention bolt structure for automobile chassis. BACKGROUND
[0002] In the modern automobile manufacturing field, the stability and reliability of automobile chassis have a vital influence on the safety, controllability and service life of the whole vehicle, the automobile chassis as the support frame of the whole vehicle bears the task of installing engine, transmission, suspension system, braking system and many other key components, and has to bear various complex stresses from the road such as vibration, impact, torque etc. during the vehicle running, in the assembly process of automobile chassis, bolt connection is the most common and widely used connection mode, many parts such as the connection of suspension arm and frame, the connection of steering knuckle and lower swing arm, the connection of wheel hub and axle etc. rely on bolts to ensure their close connection and relative fixed position.
[0003] At present, when the vehicle is running, especially when dynamic stress is generated by passing through the bumpy road or high-speed running, the connecting bolts between the chassis components will be subjected to continuous alternating stress, and this alternating stress can easily reduce the pre-tightening force of the bolts, thereby causing the bolts to loosen, and the consequences of bolt loosening on the automobile chassis are very serious, once the bolt loosening occurs, it will first affect the connection tightness between the chassis components, cause abnormal vibration and noise during the vehicle running to intensify, affect the riding comfort and endanger the driving safety.
[0004] Therefore, we provide a loosening prevention bolt structure for automobile chassis to solve the above problems. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a loosening prevention bolt structure for automobile chassis, through the setting of limiting assembly and reset assembly, the problem that the existing automobile chassis bolt lacks loosening prevention function is solved, after the bolt is affected by long-time vibration, the bolt is easy to loosen, and the problem of affecting driving safety is solved.
[0006] To solve the above technical problems, the utility model is realized by the following technical schemes.
[0007] The utility model discloses a kind of anti-loose bolt structures for automobile chassis, including screw rod, nut is connected with the screw rod surface thread, and bolt head is installed at the screw rod top;Limiting assembly is arranged in the screw rod, and limiting assembly includes guiding groove in the screw rod inside, limiting block slidingly connected in guiding groove inside, fixed ring installed in the nut bottom, and clamping block fixedly connected in the fixed ring bottom;Reset component is arranged in the screw rod, and reset component includes moving plate slidingly connected in guiding groove inside, inclined slot in the moving plate inside, and moving shaft slidingly connected in the inclined slot inside.
[0008] The utility model further is provided with, reset component still includes vertical rod slidingly connected in the moving plate inside, and spring is sleeved on the vertical rod surface.
[0009] The utility model further is provided with, screw rod surface is provided with outer thread, and nut is provided with inner thread in the inside.
[0010] The utility model further is provided with, clamping block cross section is right triangle, and one side right angle of clamping block is in contact with limiting block.
[0011] The utility model further is provided with, guiding groove bottom is provided with through groove, and push block is slidingly connected in the through groove, and push block top is fixedly connected with moving plate.
[0012] The utility model further is provided with, and moving shaft front side and rear side are fixedly connected with the inner wall of limiting block, and one side of limiting block is penetrated to the outside of screw rod.
[0013] The utility model further is provided with, and vertical rod top is fixedly connected with the inner wall of guiding groove, and one end of spring is fixedly connected with moving plate.
[0014] The utility model has following beneficial effect.
[0015] 1, the utility model is through the design of limiting assembly and reset component, realizes the effective anti-loose of automobile chassis bolt, when nut is tightened, limiting block is under the action of spring, through the linkage of inclined slot and moving plate, can automatically wear out screw rod and lock nut, this structure design makes bolt when being subjected to vibration or dynamic stress, can keep stable pre-tightening force, avoids the security risk caused by bolt loosening, in addition, when needing to dismount nut, push block can be pushed through external tool, can release the locking state of limiting block, facilitate bolt quick dismounting, improve maintenance efficiency.
[0016] 2、The anti-loose bolt structure of the utility model also has secondary limiting function, when the nut is slightly loose, the limiting block can quickly block the counterclockwise rotation of the clamping block, thereby preventing the nut from further loosening, this double protection mechanism significantly improves the reliability of bolt connection, ensures the stable connection of automobile chassis parts, meanwhile, the structure design is simple and reliable, easy to manufacture and maintain, suitable for bolt connection demand under various complex working conditions, provides powerful guarantee for the safety and stability of automobile.
[0017] Of course, it is not necessary for any product implementing the utility model to achieve all the advantages mentioned above at the same time. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used for the embodiment description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0019] Figure 1 It is a perspective view of an anti-loose bolt structure for automobile chassis.
[0020] Figure 2 It is a bottom view of the anti-loose bolt structure for automobile chassis. Figure 1
[0021] Figure 3 It is a sectional view of screw rod and nut in the anti-loose bolt structure for automobile chassis.
[0022] Figure 4 It is an internal structure schematic view of screw rod in the anti-loose bolt structure for automobile chassis.
[0023] Figure 5 It is an installation schematic view of nut in the anti-loose bolt structure for automobile chassis.
[0024] In the drawings: 1, screw rod;2, nut;3, bolt head;4, limiting assembly;401, guide groove;402, limiting block;403, fixed ring;404, clamping block;5, reset assembly;501, moving plate;502, inclined slot;503, moving shaft;504, vertical rod;505, spring;6, through slot;7, push block. DETAILED DESCRIPTION
[0025] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application. Embodiment one
[0027] Please refer to Figures 1-5 The utility model discloses a kind of anti-loose bolt structures for automobile chassis, including screw rod 1, screw rod 1 surface is connected with nut 2 by thread, screw rod 1 top is equipped with bolt head 3;Screw rod 1 inside is provided with limit component 4, limit component 4 includes the guide groove 401 being opened in the inside of screw rod 1, the limit block 402 being slidably connected in the inside of guide groove 401, the fixed ring 403 being installed in the bottom of nut 2, and the clamping block 404 being fixedly connected to the bottom of fixed ring 403;Screw rod 1 inside is provided with reset component 5, reset component 5 includes the moving plate 501 being slidably connected in the inside of guide groove 401, the inclined slot 502 being opened in the inside of moving plate 501, and the moving shaft 503 being slidably connected in the inside of inclined slot 502.
[0028] Specifically, bolt head 3 and screw rod 1 are fixed by welding, screw rod 1 surface is equipped with external thread, and the internal thread opened in nut 2 is matched, when nut 2 is rotated to screw rod 1 surface, can utilize the locking effect of thread to connect and fix automobile accessory, the number of clamping block 404 is twelve, the inclined direction of the inclined surface of clamping block 404 is consistent with the thread tightening direction, and is arranged with screw rod 1 as the axis circle, when limit block 402 one end moves to the outside of screw rod 1, can prevent clamping block 404 counterclockwise rotation, play the role of limiting nut 2, moving shaft 503 and inclined slot 502 inner wall are slidably connected, when moving plate 501 moves, can promote moving shaft 503 horizontal movement. Embodiment two
[0030] Please refer to Figures 1-5 On the basis of embodiment one, reset component 5 further includes the vertical rod 504 being slidably connected in the inside of moving plate 501, the spring 505 being sleeved on the surface of vertical rod 504, the external thread being opened on the surface of screw rod 1, the internal thread being opened in nut 2, the clamping block 404 section is right triangle, the side right angle of clamping block 404 is contacted with limit block 402, the through slot 6 is opened in the bottom of guide groove 401, the push block 7 is slidably connected in the inside of through slot 6, the top of push block 7 is fixedly connected with moving plate 501, the front side and the back side of moving shaft 503 are fixedly connected with the inner wall of limit block 402, the side of limit block 402 is penetrated to the outside of screw rod 1, the top of vertical rod 504 is fixedly connected with the inner wall of guide groove 401, one end of spring 505 is fixedly connected with moving plate 501.
[0031] Specifically, the spring 505 has the function of compression and energy storage, which can elastically reset the moving plate 501. The vertical rod 504 is slidably connected to the inner wall of the moving plate 501, which can provide support when the moving plate 501 moves vertically. The right-angled edge of the locking block 404 is in contact with the limiting block 402, which can prevent the locking block 404 from rotating counterclockwise. The through groove 6 is connected to the guide groove 401. The bottom of the through groove 6 is completely through-hole designed. The push block 7 is slidably connected to the inner wall of the through groove 6. When it is necessary to remove the nut 2, an external tool can be inserted into the through groove 6 to push the push block 7.
[0032] The operation process in this embodiment is as follows: When installing the screw 1, the operator can manually insert the screw 1 into the two sets of connectors, then manually rotate the nut 2 to connect the nut 2 to the screw 1. Afterwards, using an external tool such as a screwdriver, the operator inserts it upwards into the through slot 6 to push the push block 7. Figure 5 As shown, when the push block 7 moves, it drives the moving plate 501 to move and squeezes the spring 505. When the moving plate 501 moves, it cooperates with the inclined groove 502 to push the moving shaft 503 to move. The moving shaft 503 drives the limit block 402 to move back into the screw 1. Then the nut 2 can continue to rotate. The thread action between the nut 2 and the screw 1 is used to fix the two sets of connecting parts.
[0033] Then, the external tool is moved out of the through slot 6, the support for the push block 7 is removed, and the moving plate 501 is reset under the action of the spring 505. The moving plate 501, together with the inclined slot 502, drives the moving shaft 503 and the limiting block 402 to pass through the screw 1 again. The limiting block 402 is used to limit the nut 2 to prevent the nut 2 from falling off the screw 1, which plays a self-locking role. At the same time, when the nut 2 becomes loose, the limiting block 402 can be used to block the locking block 404, which plays a secondary limiting role and further improves the stability of the screw 1 installation.
[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0035] The preferred embodiments disclosed above are only used to help describe the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.
Claims
1. A loosening-preventing bolt structure for an automobile chassis, comprising a screw rod (1), characterized in that: The screw rod (1) is externally threaded with a nut (2), and the top of the screw rod (1) is provided with a bolt head (3); The screw rod (1) is internally provided with a limiting assembly (4), which comprises a guide groove (401) formed in the screw rod (1), a limiting block (402) slidably connected in the guide groove (401), a fixing ring (403) mounted at the bottom of the nut (2), and a clamping block (404) fixedly connected to the bottom of the fixing ring (403); The screw rod (1) is internally provided with a reset assembly (5), which comprises a moving plate (501) slidably connected in the guide groove (401), an inclined slot (502) formed in the moving plate (501), and a moving shaft (503) slidably connected in the inclined slot (502).
2. The anti-loosening bolt structure for an automobile chassis according to claim 1, wherein The reset assembly (5) further comprises a vertical rod (504) slidably connected in the moving plate (501), and a spring (505) sleeved on the surface of the vertical rod (504).
3. The anti-loosening bolt structure for an automobile chassis according to claim 1, wherein The screw rod (1) is externally threaded, and the nut (2) is internally threaded.
4. The anti-loosening bolt structure for an automobile chassis according to claim 1, wherein The clamping block (404) is a right-angled triangle in cross section, and one side of the right-angled triangle is in contact with the limiting block (402).
5. The anti-loosening bolt structure for an automobile chassis according to claim 1, wherein The bottom of the guide groove (401) is provided with a through groove (6), and the through groove (6) is slidably connected with a push block (7) inside, and the top of the push block (7) is fixedly connected with the moving plate (501).
6. The anti-loosening bolt structure for an automobile chassis according to claim 1, wherein The front side and the rear side of the moving shaft (503) are fixedly connected with the inner wall of the limiting block (402), and one side of the limiting block (402) penetrates to the outside of the screw rod (1).
7. The anti-loosening bolt structure for an automobile chassis according to claim 2, wherein The top of the vertical rod (504) is fixedly connected with the inner wall of the guide groove (401), and one end of the spring (505) is fixedly connected with the moving plate (501).