Automobile expansion support and automobile with same
By designing a foldable car extension bracket and fastening mechanism, the assembly and disassembly process is simplified, solving the problem of cumbersome existing extension brackets and improving convenience and safety.
Patent Information
- Application Number
- CN202423278783.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing car extension brackets are cumbersome to assemble and disassemble, affecting aesthetics and posing safety hazards.
A foldable car extension bracket was designed, employing a fastening mechanism including a rotating rod and a fastening plug. The assembly and disassembly process is simplified by connecting the matching of the unfolding and retracting concentric holes with the fastening mechanism.
It reduces the difficulty of assembly and disassembly, improves the convenience and safety of use, provides better fastening effect, and avoids threaded connection failure caused by slight movement.
Smart Images
Figure CN223590646U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile accessories, in particular to an automobile expansion support and an automobile with the support. BACKGROUND
[0002] The automobile expansion support is an automobile accessory produced to meet various expansion needs in the use process of the automobile. The automobile is no longer only a means of transportation, but also an important carrier for people's travel, travel and life. For example, in the current situation where self-driving travel is becoming more and more popular, people need to carry a large amount of luggage, camping equipment, bicycles and other items. However, the trunk space of the automobile itself is limited and cannot meet these needs.
[0003] For the above needs, at present, a mountable expansion support has been developed on the automobile as a means of expanding the additional space of the automobile. The installation of the expansion support can allow the automobile to hold more things or things that are not suitable for being placed in the car. However, the existing automobile expansion support is generally complicated to use. It needs to be assembled first, the assembly process is very cumbersome and a large number of tools are needed, and it is not convenient for one person to assemble. After being installed on the automobile after assembly, it also needs to be disassembled for storage after use, which is also very cumbersome, and tools need to be prepared in the car. If it is not disassembled, the automobile expansion support will be placed at the tail of the automobile, which not only has a safety hazard, but also affects the appearance.
[0004] Therefore, it is necessary to improve the automobile expansion support to reduce its assembly and disassembly difficulty. INVENTION CONTENTS
[0005] The utility model aims at improving the automobile expansion support to reduce its assembly and disassembly difficulty, and the technical scheme adopted is as follows:
[0006] An automobile expansion support comprises a main frame, a support frame and a fastening mechanism. A fixing piece is arranged on the main frame. The tail ends of the support frames distributed on both sides of the main frame are pivotally connected to the fixing piece. A through hole provided on the fixing piece matches with the unfolding concentric hole and the folding concentric hole provided on the tail end of the support frame.
[0007] The unfolding concentric holes of the two support frames in the unfolded state are coincided with the through hole of the fixing piece. The unfolding concentric holes and the through hole are penetrated and fixed by the fastening mechanism.
[0008] The folding concentric holes of the two support frames in the folded state are coincided with the through hole of the fixing piece. The folding concentric holes and the through hole are penetrated and fixed by the fastening mechanism.
[0009] The fastening mechanism is provided with a rotating rod and a fastening plug, the fastening plug is movably embedded in the inner groove of the fixed sheet, the rotating rod penetrates from the outer hole of the fixed sheet and is embedded in the fastening plug, and the rotating rod is threadedly connected with the fixed sheet.
[0010] The automobile expansion support is designed as a folding type, the support is opened and installed on the automobile when needed, and is directly disassembled and folded and placed in the trunk when not in use, so that the use space is greatly reduced, and installation is not needed during use, which is convenient and safe.
[0011] The second advantage of the present application is that the fastening plug of the fastening mechanism is designed, which can avoid the conversion of the expansion support state.
[0012] The third advantage of the present application is that the fastening mechanism is connected with the expansion and concentric hole or the retracted concentric hole of the support frame through the fastening plug, and the fastening plug is connected with the rotating rod in a fitting manner, so that the sliding pressure of the heavy support frame on the fastening plug caused by the slight movement of the vehicle can be reduced.
[0013] The fourth advantage of the present application is that the fastening plug is movably embedded in the inner groove of the fixed sheet, and the connection with the support frame is more stable when the support frame is slightly moved or vibrated by the vehicle.
[0014] Specifically, the fastening plug is made of rubber, and the fastening plug is filled with an expansion elastomer wrapping the rotating rod, and the expansion elastomer extends from the front end of the rotating rod to the circumferential surface of the rotating rod.
[0015] Specifically, the bottom of the support frame is provided with a balance frame abutting against the side surface of the main frame when the support frame is in an expanded state, so as to limit the expansion angle of the support frame.
[0016] More specifically, the support frame is a hollow structure, and the hollow structure has an interwoven wrapping net.
[0017] Specifically, the main frame and the support frame are both made of metal material.
[0018] Specifically, the tail end of the rotating rod is fixed with a knob of a slightly circular structure.
[0019] Specifically, the automobile expansion support further comprises an adapter frame, the adapter frame is provided with an adapter hole, an expansion fixing hole and a retraction fixing hole, the adapter hole is pivotally connected with the main frame, and the main frame is provided with a connecting hole matched with the expansion fixing hole and the retraction fixing hole.
[0020] The deployment fixing hole of the adapter frame in the deployment state is fixed by the fixing member and the connecting hole.
[0021] The stowed fixing hole of the adapter frame in the stowed state is fixed by the fixing member and the connecting hole.
[0022] A car has the car expansion support. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 A three-dimensional schematic view of the car expansion support.
[0024] Figure 2 A back view of the car expansion support.
[0025] Figure 3 A main frame of the car expansion support.
[0026] Figure 4 A fixing plate and a fastening mechanism of the car expansion support.
[0027] Figure 5 A fixing plate and a fastening mechanism of the car expansion support.
[0028] Figure 6 A structure of the fastening mechanism of the car expansion support.
[0029] Figure 7 An adapter frame of the car expansion support in a stowed state.
[0030] Figure 8 A support frame of the car expansion support in a stowed state.
[0031] 10, main frame, 11, fixing plate;
[0032] 20, support frame, 21, deployment concentric hole, 22, stowed concentric hole, 23, balance frame;
[0033] 30, fastening mechanism, 31, rotating rod, 32, fastening plug, 33, expansion elastic body;
[0034] 40, adapter frame, 41, adapter hole, 42, deployment fixing hole, 43, stowed fixing hole. DETAILED DESCRIPTION
[0035] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0036] In the description of this utility model, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 this utility model. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0038] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known painting methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other.
[0039] Example 1:
[0040] It should be noted that the accompanying drawings are part of the content of the instruction manual. The structural shapes, connections, fits, and positional relationships that can be clearly seen in the accompanying drawings should all be understood as part of the content of the instruction manual.
[0041] A car extension bracket, such as Figure 1、 Figure 2 As shown, it comprises a main frame 10, support frames 20 and a fastening mechanism 30. The main frame 10 is provided with a fixed plate 11. The tail ends of the support frames 20 distributed on both sides of the main frame 10 are pivotally connected with the fixed plate 11. A through hole provided on the fixed plate 11 matches with the unfolding concentric hole 21 and the folding concentric hole 22 provided on the tail end of the support frame 20.
[0042] As shown in the figure, Figure 1 In the unfolded state, the unfolding concentric hole 21 of each support frame 20 coincides with the through hole of the fixed plate 11. The unfolding concentric hole 21 and the through hole are penetrated and fixed together by the fastening mechanism 30.
[0043] As shown in the figure, Figure 8 In the folded state, the folding concentric hole 22 of each support frame 20 coincides with the through hole of the fixed plate 11. The folding concentric hole 22 and the through hole are penetrated and fixed together by the fastening mechanism 30.
[0044] Whether the unfolded state is switched to the folded state or the folded state is switched to the unfolded state, the support frame 20 rotates with the pivot point of the support frame 20 and the fixed plate 11 as the center.
[0045] As shown in the figure, Figure 3 、 Figure 4 、 Figure 5 The fastening mechanism 30 has a rotating rod 31 and a fastening plug 32. The fastening plug 32 is movably embedded in the inner groove of the fixed plate 11. The rotating rod 31 penetrates the outer hole of the fixed plate 11 and is embedded in the fastening plug 32.
[0046] The rotating rod 31 is provided with external threads, and the outer hole is provided with internal threads. The rotating rod 31 is threadedly connected with the fixed plate 11.
[0047] In a laboratory environment, performance testing of the automobile expansion support requires the use of professional testing methods and equipment to simulate various working conditions and conditions in actual use and comprehensively evaluate its performance indicators (there is no specific relevant standard test in China, so the load is 100 kg).
[0048] For strength testing of the support, a universal material testing machine is usually used for static load testing. The expansion support is fixed on the test bench according to the actual installation method, and then a vertical downward load is gradually applied until a certain multiple (such as 1.5 times or 2 times) of the design load is reached. Observe the deformation of the support during the loading process and whether there is a damage phenomenon. By pasting strain gauges at key positions of the support (such as the connection position of the fastening mechanism 30 and the support frame 20), real-time monitoring of strain data is performed using a strain measuring instrument to determine the stress distribution of the support under different loads and evaluate whether the structural strength meets the design requirements.
[0049] Stability testing is conducted by simulating the vibration and jolt conditions during vehicle driving. Using a vibration test bench, the simulated vehicle platform with the extension bracket is excited with a certain frequency range (e.g., 5-50 Hz) and acceleration amplitude (e.g., 0.5-2 g), and the displacement, sway amplitude, and loosening of the connection part with the vehicle during vibration are observed. At the same time, laser displacement sensors or acceleration sensors can be used to measure the displacement and acceleration of key parts of the bracket, and the dynamic response data in the vibration environment are obtained to evaluate the stability and anti-vibration performance of the bracket.
[0050] Durability testing is an important means to evaluate the service life of the extension bracket. A fatigue testing machine is used to conduct repeated loading and unloading cycle tests on the bracket to simulate the load changes during long-term use. For example, a certain load amplitude and cycle number (e.g., 100,000 or 200,000 times) are set, and the crack initiation and propagation of the bracket and the wear of the structural parts are observed during the fatigue test. By regularly checking and measuring the key dimensions and performance parameters of the bracket, it can be determined whether it meets the design life requirements.
[0051] In addition, the material properties of the extension bracket are also tested, such as using a hardness tester to measure the hardness of the material, observing the microstructure of the material through a metallographic microscope, and using a salt spray test chamber to test the corrosion resistance of the material, etc. to ensure that the selected material meets the design requirements and can maintain stable performance during long-term use.
[0052] Through these laboratory test methods, the performance indicators of the automobile extension bracket can be comprehensively and accurately evaluated, providing strong support for the optimization design, quality improvement, and reliability verification of the product, ensuring that it can safely and reliably operate in actual use and meet the needs of users.
[0053] Road driving test
[0054] Road driving test is an important step to evaluate the performance of the automobile extension bracket. By driving the vehicle with the extension bracket installed under different road conditions, the performance of the bracket in actual use and the influence on the vehicle handling can be truly reflected.
[0055] In the city road driving test, the vehicle needs to start and stop frequently and turn, which puts higher requirements on the stability and firmness of the extension bracket. The test vehicle carries a certain weight of simulated goods, installs a roof rack and a trunk extension bracket, and drives on the city road according to the normal traffic rules for a certain mileage. The displacement, shaking of the bracket during acceleration, braking, turning and other operations of the vehicle, and the loosening of the connection part between the bracket and the vehicle are observed. Vehicle-mounted sensors are used to record the driving posture, acceleration, speed and other parameters of the vehicle, while displacement sensors and strain gauges are installed at the key parts of the bracket to monitor the deformation and stress change of the bracket.
[0056] For example, in a city road driving test, a new type of roof rack and trunk extension bracket are installed on the vehicle, two luggage boxes with a total weight of 50 kg are carried on the roof rack, and some miscellaneous items with a total weight of about 20 kg are placed on the trunk extension bracket. During driving, sensor data shows that when the vehicle brakes suddenly, the maximum displacement of the roof rack is 5 mm and the displacement of the trunk extension bracket is 3 mm, both of which are within the safe range, and the connection part between the bracket and the vehicle does not show signs of loosening, indicating that the bracket has good stability and reliability in city road driving conditions and does not significantly affect the controllability of the vehicle.
[0057] For highway driving test, due to high speed, wind resistance has a greater impact on the extension bracket, and the driving stability of the vehicle is also more critical. The test vehicle drives on the highway at different speeds, from 80 km / h to 120 km / h, and observes the wind noise, vibration of the bracket and the impact on the fuel economy of the vehicle. Using wind tunnel test data and actual driving fuel consumption monitoring data, the wind resistance coefficient and fuel consumption increase of the bracket are analyzed.
[0058] In a highway driving test, a certain type of car is equipped with an optimized design of roof rack, and the wind resistance coefficient is reduced by 10% compared with the traditional roof rack through wind tunnel test. In the actual driving test, when the vehicle speed is 100 km / h, the fuel consumption of the vehicle increases by 8% compared with the vehicle without installing the roof rack, which is lower than the fuel consumption increase of the same type of roof rack in the previous test, indicating that the aerodynamic performance of the roof rack has been effectively improved, and the impact on the fuel economy of the vehicle is smaller. At the same time, during high-speed driving, the vibration and noise of the bracket are controlled within an acceptable range, which does not bring obvious discomfort to the driver and passengers, ensuring the driving comfort and safety of the vehicle.
[0059] In the rural road and off-road road test, the vehicle will encounter bumps, ups and downs of the road, which is a severe test of the structural strength and shock resistance of the expansion bracket. The test vehicle drives on rural soil roads, gravel roads and simulated off-road sites, etc. The weight of the simulated goods is reasonably loaded according to the carrying capacity of the bracket, and whether the bracket deforms, damages, etc. during the bumping process, and whether the goods can be stably fixed are observed.
[0060] The advantage of the present application is that the automobile expansion bracket is designed as a folding type, which is opened and installed on the automobile when needed, and is directly folded and placed in the trunk when not in use, greatly reducing the use space and being convenient and safe to use without installation.
[0061] The second advantage of the present application is that the design of the fastening plug 32 of the fastening mechanism 30 avoids the conversion of the expansion bracket state.
[0062] The third advantage of the present application is that the fastening mechanism 30 is connected and contacted with the unfolding concentric hole 21 or the folding concentric hole 22 of the support bracket 20 through the fastening plug 32, and the fastening plug 32 is connected with the rotating rod 31 in a fitting manner, which can reduce the sliding pressure of the heavy support bracket 20 on the fastening plug 32 when the vehicle slides. Compared with the scheme of using threaded connection support bracket 20, which causes the micro-movement support bracket 20 to press the threaded part, the fastening effect of the present application is undoubtedly better.
[0063] The fourth advantage of the present application is that the fastening plug 32 is movably embedded in the inner side groove of the fixed sheet 11, and when subjected to the pressure of the micro-movement support bracket 20 or the vibration force of the vehicle driving, it cannot move out of the inner side groove of the fixed sheet 11, and the connection with the support bracket 20 can be more stable.
[0064] Specifically, as shown in Figure 6 The fastening plug 32 is made of rubber, and the fastening plug 32 is filled with an expansion elastomer 33 wrapped around the rotating rod 31, and the expansion elastomer 33 extends from the front end of the rotating rod 31 to the circumferential surface of the rotating rod 31.
[0065] The fifth advantage of the present application is that the fastening plug 32 is pushed and pressed into the unfolding concentric hole 21 or the folding concentric hole 22 of the support bracket 20 by the rotating rod 31, and in this process, the expansion elastomer 33 in the fastening plug 32 is stressed, and the volume is transferred to the circumferential surface area of the rotating rod 31, so that the fastening plug 32 is slightly expanded to better fix the support bracket 20.
[0066] Specifically, as shown in Figure 2 The bottom of the support bracket 20 is provided with a balance bracket 23, which abuts against the side surface of the main bracket 10 when the support bracket 20 is in the unfolded state, so as to limit the unfolding angle of the support bracket 20.
[0067] More specifically, as shown in Figure 1 , Figure 2 , the support frame 20 is a hollow structure with interwoven wrapping nets.
[0068] Specifically, the main frame 10 and the support frame 20 are both made of metal materials.
[0069] Specifically, as shown in Figure 4 , the tail end of the rotating rod 31 is fixed with a knob of a slightly circular structure.
[0070] Specifically, as shown in Figure 1 , Figure 2 , Figure 7 , the automobile expansion bracket further comprises an adapter frame 40, which is provided with an adapter hole 31, an unfolding fixing hole 42 and a folding fixing hole 43, the adapter hole 31 is pivoted with the main frame 10, and the main frame 10 is provided with a connecting hole matched with the unfolding fixing hole 42 and the folding fixing hole 43.
[0071] The unfolding fixing hole 42 of the adapter frame 40 in the unfolded state and the connecting hole are fixed by the fixing member. The adapter frame 40 in the unfolded state is fixed with the automobile body to enhance the load capacity of the automobile expansion bracket.
[0072] The folding fixing hole 43 of the adapter frame 40 in the folded state and the connecting hole are fixed by the fixing member.
[0073] Whether the unfolded state is switched to the folded state or the folded state is switched to the unfolded state, the adapter frame 40 rotates with the pivot point of the adapter frame 40 and the main frame 10 as the center.
[0074] Embodiment 2:
[0075] An automobile with the above automobile expansion bracket.
[0076] Although the above describes the specific embodiments of the present application for the purpose of enabling those skilled in the art to understand the present application, the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims, all the application creations utilizing the concept of the present application are within the scope of protection.
Claims
1. A car extension bracket, comprising a main frame, a support frame, and a fastening mechanism, characterized in that, The main frame is equipped with a fixing plate, and the tail ends of the support frames distributed on both sides of the main frame are pivotally connected to the fixing plate. A through hole on the fixing plate matches the unfolding concentric hole and the retracting concentric hole provided at the tail end of the support frame. In the unfolded state, the concentric holes of each of the two support frames coincide with the through holes of the fixing plate, and the concentric holes and the through holes are passed through and fixed together by the fastening mechanism; In the retracted state, the retracted concentric holes of each of the two support frames coincide with the through holes of the fixing plate, and the retracted concentric holes and the through holes are passed through and fixed together by the fastening mechanism; The fastening mechanism includes a rotating rod and a fastening plug. The fastening plug is movably embedded in the inner groove of the fixing plate. The rotating rod passes through the outer hole of the fixing plate and is embedded in the fastening plug. The rotating rod is threadedly connected to the fixing plate.
2. The car extension bracket according to claim 1, characterized in that, The fastening plug is made of rubber and is filled with an expanded elastomer that surrounds the rotating rod, the expanded elastomer extending from the front end of the rotating rod to the circumferential surface of the rotating rod.
3. The car extension bracket according to claim 1, characterized in that, A balancing frame is provided at the bottom of the support frame. When the support frame is in the unfolded state, the balancing frame abuts against the side of the main frame to limit the unfolding angle of the support frame.
4. The car extension bracket according to claim 3, characterized in that, The support frame is a hollow structure containing interwoven wrapping netting.
5. The car extension bracket according to claim 1, characterized in that, Both the main frame and the support frame are made of metal.
6. The car extension bracket according to claim 1, characterized in that, The tail end of the rotating rod is fixed with a knob of a slightly rounded structure.
7. The car extension bracket according to claim 1, characterized in that, The car extension bracket also includes an adapter frame, which has an adapter hole, an unfolding fixing hole and a retracting fixing hole. The adapter hole is pivotally connected to the main frame, and the main frame has a connection hole that matches the unfolding fixing hole and the retracting fixing hole. In the unfolded state, the unfolding fixing hole and the connecting hole of the adapter frame are passed through and fixed by a fastener; In the retracted state, the retractable fixing hole and the connecting hole of the adapter are passed through and fixed by the fixing member.
8. A car, characterized in that, The vehicle has the vehicle extension bracket as described in any one of claims 1-7.