An easy-to-install stamped metal connecting bracket for automobiles
By setting guide arcs, protrusions, and drainage grooves inside the through holes of automotive stamped metal connecting brackets, an anti-corrosion drainage system is constructed, solving the problem of corrosion inside the holes and achieving stable connection in humid and saline environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU SHENYUE ELECTROMECHANICAL CO LTD
- Filing Date
- 2025-10-22
- Publication Date
- 2026-07-31
AI Technical Summary
In humid and salty environments, the inner walls of stamped metal connecting brackets for automobiles are prone to corrosion, leading to the accumulation of corrosive media in the gaps, making it difficult to prevent the entry and volatilization of corrosive media, thus affecting the stability of the connection.
The design incorporates guide arcs, raised strips, strip grooves, and drainage channels within the through-hole to construct an anti-corrosion drainage system, providing a discharge channel to remove corrosive media and reduce borehole wall corrosion.
It effectively prevents the accumulation of corrosive media, slows down the corrosion process of the hole wall, improves the anti-loosening and anti-deformation ability of the connectors, and ensures the stability of the connection.
Smart Images
Figure CN224576434U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of connecting bracket technology, specifically to an easy-to-install stamped metal connecting bracket for automobiles. Background Technology
[0002] A connecting bracket is a component that can fix, support and connect mechanical parts to ensure that they maintain a stable relative position during operation and transmit loads or motion. Among them, automotive stamped metal brackets are parts made by metal stamping process and used to fix, connect or support various system components of a vehicle in parts such as the body, chassis, and engine compartment. The core function of the holes stamped on the automotive stamped metal connecting bracket is to achieve installation and fixation. These holes usually need to be precisely aligned with the mounting holes on the base, and the bracket is firmly fixed to the body sheet metal or other parts by bolts or rivets, thereby achieving a reliable connection and support between the bracket and the body or related parts. However, after holes are made in the metal connecting bracket, the inner wall of the hole becomes a stress concentration point. When the bracket is subjected to vibration, impact or alternating load, a certain gap will appear between the inner wall of the hole and the fastener. In humid and salty environments (such as coastal areas and roads where de-icing agents are spread in winter), corrosive media such as moisture and salt can easily enter the gap between the inner wall of the hole and the fastener and accumulate. They are difficult to evaporate or clean, resulting in the corrosion rate of the inner wall of the hole being much faster than that of other surfaces of the component. Therefore, a stamped metal connecting bracket for automobiles that is easy to install is proposed to address the above problems. Utility Model Content
[0003] The purpose of this invention is to provide an easy-to-install stamped metal connecting bracket for automobiles, in order to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: An easy-to-install stamped metal connecting bracket for automobiles includes a rear axle main beam and a stamped steel leaf spring mounting base. The stamped steel leaf spring mounting base is welded and fixed to the outer side of the rear axle main beam. A through hole is formed on the inner side of the stamped steel leaf spring mounting base. A guide arc is provided at the opening edge of one end of the through hole. A protrusion is provided on the inner side of the through hole. A strip-shaped groove is formed on the inner side of the through hole. A smooth transition arc is provided at the upper end of the strip-shaped groove. An arc-shaped transition part is provided at the bottom end of the strip-shaped groove. An arc-shaped top is provided at the upper end of the protrusion. An arched surface is provided at the bottom end of the protrusion. A groove is formed on one side of the stamped steel leaf spring mounting base. A drainage groove is formed on one side of the stamped steel leaf spring mounting base.
[0005] As a further optimization of this utility model, the diameter of the through hole is between 18mm and 25mm, the opening height of the through hole is the same as the thickness of the stamped steel leaf spring mounting seat, and the opening height of the through hole is between 20mm and 40mm.
[0006] As a further optimization of this utility model, the radius R of the guide arc angle is between 1mm and 2mm, the ratio of the radius of the guide arc angle to the opening height of the through hole is 1:20, and the guide arc angle and the smooth transition arc angle are connected to each other, with a smooth transition at the connection point.
[0007] As a further optimization of this utility model, the following features are provided: a plurality of convex strips are provided, and the plurality of convex strips are evenly and equidistantly distributed in a circular array on the inner side of the through hole, and the width of the convex strips along the radial direction of the through hole is one-tenth of the radius of the through hole.
[0008] As a further optimization of this utility model, the convex strips and the strip grooves are distributed alternately, the projection of the strip grooves in the vertical direction is "U" shaped, and the strip grooves are connected to the drainage grooves through the connection of the arc transition part.
[0009] As a further optimization of this utility model, the position of the arched surface corresponds one-to-one with the position of the groove, and the arched surface and the drainage groove are staggered with each other.
[0010] As a further optimization of this utility model, the groove depth is 1mm, the drainage channel is inclined, the groove and the drainage channel are connected, and the edge of the drainage channel away from the center of the through hole is provided with an arc edge.
[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, by setting through holes, the connection function is ensured, and the problem of easy corrosion of the inner wall of the hole in a humid and salty environment is addressed. The invention breaks the closed gap environment formed by the traditional smooth hole wall, provides a channel structure for the discharge of invading corrosive media, and constructs a highly efficient anti-corrosion drainage system to delay the corrosion process of the hole wall. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the stamped steel leaf spring mounting base of this utility model; Figure 4 for Figure 3 Enlarged structural diagram at point B; Figure 5 A top view of the stamped steel leaf spring mounting base; Figure 6 for Figure 5 Enlarged structural diagram at point C; Figure 7 A bottom view of the stamped steel leaf spring mounting base; Figure 8 for Figure 7 Enlarged structural diagram at point D.
[0013] In the diagram: 1. Main beam of the rear axle of the automobile; 2. Stamped steel leaf spring mounting seat; 3. Through hole; 4. Guide arc angle; 5. Protrusion; 6. Strip groove; 7. Smooth transition arc angle; 8. Arc transition section; 9. Arc top; 10. Arch surface; 11. Groove; 12. Drainage channel; 13. Arc edge. Detailed Implementation
[0014] 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.
[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0016] Please see Figures 1-8 This utility model provides a technical solution: An easy-to-install stamped metal connecting bracket for automobiles includes a rear axle main beam 1 and a stamped steel leaf spring mounting seat 2. The stamped steel leaf spring mounting seat 2 is welded and fixed to the outer side of the rear axle main beam 1. A through hole 3 is provided on the inner side of the stamped steel leaf spring mounting seat 2. A guide arc angle 4 is provided at the edge of the opening of one end of the through hole 3. A protrusion 5 is provided on the inner side of the through hole 3. A strip-shaped groove 6 is provided on the inner side of the through hole 3. A smooth transition arc angle 7 is provided at the upper end of the strip-shaped groove 6. An arc-shaped transition part 8 is provided at the bottom end of the strip-shaped groove 6. An arc-shaped top 9 is provided at the upper end of the protrusion 5. An arched surface 10 is provided at the bottom end of the protrusion 5. A groove 11 and a drainage groove 12 are provided on one side of the stamped steel leaf spring mounting seat 2.
[0017] As a further implementation of this solution, the diameter of the through hole 3 is between 18mm and 25mm, the opening height of the through hole 3 is the same as the thickness of the stamped steel leaf spring mounting seat 2, and the opening height of the through hole 3 is between 20mm and 40mm. The radius R of the guide arc angle 4 is between 1mm and 2mm, and the ratio of the radius of the guide arc angle 4 to the opening height of the through hole 3 is 1:20. The guide arc angle 4 and the smooth transition arc angle 7 are connected to each other, and the connection is smooth. The corresponding setting of the diameter of the through hole 3 and its opening height can meet the needs of the corresponding connecting parts (such as bolts, pins, etc.) for insertion. In this case, it also avoids uneven local stress on the mounting base caused by height mismatch. The setting of the guide arc angle 4 can effectively avoid the impact collision between the outer side of the bolt and the edge of the through hole 3, and prevent the edge of the hole from being slightly deformed or the coating from being damaged. Moreover, the ratio of the arc radius of the guide arc angle 4 to the opening height of the through hole 3 is an optimized design that takes into account both "guiding effect" and "structural occupation". If its arc radius is too large, it will occupy too much internal space of the mounting base and weaken the local strength. If its arc radius is too small, the guiding effect will not be obvious. The ratio of 1:20 can achieve the best guiding effect of the connector within the limited height dimension. As a further implementation of this solution, several protruding strips 5 are provided, and these protruding strips 5 are evenly and equidistantly distributed in a circular array inside the through hole 3. The radial width of the protruding strips 5 along the through hole 3 is one-tenth of the radius of the through hole 3. The protruding strips 5 and the strip-shaped grooves 6 are staggered. The projection of the strip-shaped grooves 6 in the vertical direction is "U" shaped. The strip-shaped grooves 6 are connected to the drainage grooves 12 through the connection of the arc-shaped transition part 8. The protruding strips 5 effectively reduce the actual contact area between the connector and the hole wall, changing from surface contact to limited line contact or point contact. This makes it easier for the connector to be inserted, and when tightened, the protruding strips 5 will undergo slight elastic deformation, providing uniform clamping force. This forms an efficient anti-loosening structure. The ratio of the convex strip 5 to the radius of the through hole 3 is one-tenth. This can create frictional resistance through slight compression between the convex strip 5 and the surface of the connector, enhancing the anti-loosening effect, without excessively hindering the assembly process. The annular array of multiple convex strips 5 ensures that the radial force applied by the connector is evenly distributed around the hole wall of the entire through hole 3, avoiding excessive local stress and improving the compression and deformation resistance of the through hole 3. The "U" shape of the strip groove 6 can better eliminate stress concentration and prevent cracks under alternating loads. The medium collected by the strip groove 6 can be guided into the drainage channel 12 without obstruction through the smooth transition of the arc transition part 8. As a further implementation of this scheme, the positions of the arched surfaces 10 correspond one-to-one with the positions of the grooves 11. The arched surfaces 10 and the drainage channels 12 are staggered. The grooves 11 are 1mm deep, and the drainage channels 12 are inclined. The grooves 11 and the drainage channels 12 are connected. The edge of the drainage channel 12 away from the center of the through hole 3 is provided with an arc edge 13. The arched surfaces 10 facilitate the condensation and sliding of corrosive media such as moisture and salt in the gap between the inner wall of the through hole 3 and the fastener. The medium flows into the groove 11 or the intersecting drainage channels 12. The medium in the groove 11 also flows into the drainage channel 12 connected to it. The inclined design of the drainage channel 12 makes the medium in the drainage channel 12 slide out from the side away from the center of the through hole 3 under the action of gravity. The arc edge 13 set at its edge plays a smooth guiding role, and at the same time can better prevent water, salt and other corrosive media from accumulating in the drainage channel 12 and flowing back into the gap between the inner wall of the through hole 3 and the fastener.
[0018] Work process: After the stamped steel leaf spring mounting seat 2 is welded and fixed to the rear axle main beam 1 of the automobile, fasteners such as bolts are passed through the through hole 3 for fixing. When the bolt is inserted into the through hole 3 from the upper opening of the through hole 3, the setting of the guide arc angle 4 and the arc top 9 can avoid the impact and collision between the outer side of the bolt and the edge of the through hole 3, and avoid the slight deformation or coating damage at the edge of the hole, which makes it more susceptible to corrosion from the external environment. When the bolt passes through the lower end of the through hole 3, the nut and the bolt are screwed together, and the upper end of the nut contacts the stamped steel leaf spring mounting seat 2. At this time, the opening of the drainage groove 12 increases the friction coefficient between the nut and the stamped steel leaf spring mounting seat 2, which can improve the anti-loosening and anti-rotation capabilities. When corrosive media such as moisture and salt in the humid air enter the gap between the inner wall of the through hole 3 and the fastener, the staggered arrangement of the protrusion 5 and the strip groove 6 ensures the stability of the bolt connection while the protrusion 5 removes the ingress media. The strip groove 6 is connected to the drainage channel 12 through the arc transition part 8, allowing some media to drain into the drainage channel 12 under gravity, while the other part of the media condenses or adheres to the surface of the arched surface 10. As the device shakes, these media will slide into the corresponding grooves 11. The media in the grooves 11 will flow into the drainage channel 12 connected to them. Due to the inclined arrangement of the drainage channel 12, the media in the drainage channel 12 slides out from the side away from the center of the through hole 3. The arc edge 13 plays a smooth guiding role, thereby better preventing the accumulation of corrosive media such as moisture and salt and their backflow into the gap between the inner wall of the through hole 3 and the fastener.
[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. An easy-to-install stamped metal connecting bracket for automobiles, comprising a rear axle main beam (1) and a stamped steel leaf spring mounting base (2), characterized in that: The rear axle main beam (1) of the automobile is welded and fixed with a stamped steel leaf spring mounting seat (2). The stamped steel leaf spring mounting seat (2) has a through hole (3) on its inner side. One end of the through hole (3) has a guide arc (4) at its opening edge. The through hole (3) has a protrusion (5) on its inner side. The through hole (3) has a strip groove (6) on its inner side. The strip groove (6) has a smooth transition arc (7) at its upper end. The strip groove (6) has an arc transition part (8) at its bottom end. The protrusion (5) has an arc top (9) at its upper end. The protrusion (5) has an arched surface (10) at its bottom end. The stamped steel leaf spring mounting seat (2) has a groove (11) on one side and a drainage groove (12) on one side.
2. The automotive stamped metal connecting bracket for easy installation according to claim 1, characterized in that: The diameter of the through hole (3) is between 18mm and 25mm. The opening height of the through hole (3) is the same as the thickness of the stamped steel plate spring mounting seat (2). The opening height of the through hole (3) is between 20mm and 40mm.
3. The automotive stamped metal connecting bracket for easy installation according to claim 1, characterized in that: The radius R of the guide arc angle (4) is between 1mm and 2mm. The ratio of the radius of the guide arc angle (4) to the opening height of the through hole (3) is 1:
20. The guide arc angle (4) and the smooth transition arc angle (7) are connected to each other, and the connection is smooth.
4. The automotive stamped metal connecting bracket for easy installation according to claim 1, characterized in that: The protrusions (5) are provided in a plurality of them. The plurality of protrusions (5) are evenly and equidistantly distributed in a ring array inside the through hole (3). The width of the protrusions (5) along the radial direction of the through hole (3) is one-tenth of the radius of the through hole (3).
5. The automotive stamped metal connecting bracket for easy installation according to claim 1, characterized in that: The protruding strip (5) and the strip groove (6) are interspersed. The projection of the strip groove (6) in the vertical direction is "U" shaped. The strip groove (6) is connected to the drainage groove (12) through the arc transition part (8).
6. The automotive stamped metal connecting bracket for easy installation according to claim 1, characterized in that: The position of the arched surface (10) corresponds one-to-one with the position of the groove (11), and the arched surface (10) and the drainage groove (12) are interleaved.
7. The automotive stamped metal connecting bracket for easy installation according to claim 1, characterized in that: The groove (11) has a depth of 1 mm, the drainage groove (12) is inclined, the groove (11) and the drainage groove (12) are connected, and the drainage groove (12) has an arc edge (13) on one side edge away from the center of the through hole (3).