A device for testing the load bearing capacity of a roof rack

Abstract

This utility model discloses a car roof rack load-bearing testing device, including a base, a horizontal seat mounted on the top of the base, a first pressure sensor mounted on the top of the horizontal seat, and a bracket supporting the car roof rack mounted on the top of the first pressure sensor; an adjustable clamping component, including a groove formed in the top of the base, a bidirectional threaded rod disposed inside the groove, a servo motor module mounted on the side surface of the base, with the output shaft of the servo motor module extending into the groove and connected to the bidirectional threaded rod, two threaded cylinders threadedly connected to the bidirectional threaded rod and symmetrically distributed, and a vertical plate disposed on the top of the threaded cylinders; the beneficial effects of this utility model are: through the designed adjustable clamping component, the clamping distance can be flexibly adjusted to adapt to car roof racks of various widths, significantly reducing testing costs, improving testing efficiency, and achieving clamping adaptation for roof racks of various widths.

Description

Technical Field

[0001] This utility model belongs to the field of luggage rack load-bearing testing technology, specifically relating to a luggage rack load-bearing testing device. Background Technology

[0002] As an important additional load-bearing component of a vehicle, the load-bearing performance of a car roof rack directly affects driving safety. During actual driving, the roof rack not only needs to bear the static weight of the luggage, but also is subjected to various dynamic loads, such as vertical impact loads generated when driving on bumpy roads, longitudinal inertial loads generated during sudden braking, and lateral centrifugal loads generated when turning. If the load-bearing capacity of the roof rack is insufficient, problems such as bracket breakage and loosening of connectors are very likely to occur under the above-mentioned dynamic loads, which will lead to luggage falling. This will not only cause property damage, but also pose a serious threat to the lives of vehicles behind and pedestrians on the road. Therefore, it is essential to conduct comprehensive and accurate load-bearing tests on car roof racks.

[0003] Currently, existing car roof rack load-bearing testing devices typically use specialized clamps to secure the roof rack. However, these clamps are mostly designed for specific car roof rack sizes, and their clamping dimensions and positions cannot be flexibly adjusted. When testing various car roof rack sizes, the corresponding specialized clamps must be replaced, which not only increases the manufacturing and storage costs of the testing equipment but also requires a significant amount of time for disassembling and installing the clamps, resulting in a substantial reduction in testing efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a vehicle roof rack load-bearing testing device. By designing a flexibly adjustable clamping component, it can achieve stable clamping of vehicle roof racks of various sizes, ensuring the stability of the testing process and the accuracy of the test data.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vehicle roof rack load-bearing testing device, comprising...

[0006] The base has a horizontal seat mounted on its top, a first pressure sensor is mounted on the top of the horizontal seat, and a bracket for supporting the car roof rack is mounted on the top of the first pressure sensor.

[0007] The adjustable clamping component includes a groove on the top of the base, a bidirectional threaded rod inside the groove, a servo motor module mounted on the side surface of the base, with the output shaft of the servo motor module extending into the groove and connected to the bidirectional threaded rod, two threaded cylinders threadedly connected to the bidirectional threaded rod and symmetrically distributed, a vertical plate on the top of the threaded cylinders, and a clamping plate on the side surface of the vertical plate that can clamp the car roof rack.

[0008] Preferably, it also includes an electric push rod disposed inside the clamping plate, and the output end of the electric push rod is connected to a movable plate.

[0009] Preferably, it also includes a guard plate disposed on the top of the clamping plate, and the guard plate is located outside the electric push rod.

[0010] Preferably, it also includes a fixing block disposed at the bottom of the guard plate, and a fixing groove adapted to the fixing block is formed at the top of the clamping plate.

[0011] Preferably, it also includes a gantry mounted on the top of the base, and a servo electric cylinder mounted inside the top of the gantry.

[0012] Preferably, the output end of the servo electric cylinder is connected to a pressure plate, and a second pressure sensor is provided at the bottom of the pressure plate, and a fixing plate is provided at the bottom of the second pressure sensor.

[0013] Preferably, the side surface of the pressure plate is provided with a slider, the inner side of the gantry frame is provided with a groove for the slider to slide, and the front surface of the gantry frame is equipped with a controller.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The adjustable clamping components allow for flexible adjustment of the clamping spacing, adapting to various width specifications of car roof racks. This significantly reduces testing costs, improves testing efficiency, and enables clamping adaptation for roof racks of various width specifications. Attached Figure Description

[0016] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0018] Figure 3 For the present utility model Figure 2 A schematic diagram of a local structure in the image;

[0019] Figure 4 For the present utility model Figure 3 A magnified schematic diagram of the local structure;

[0020] Figure 5 This is a schematic diagram of the splicing structure of the protective plate and clamping plate of this utility model.

[0021] In the picture:

[0022] 1. Base; 11. Groove; 12. Servo motor module; 2. Gantry frame; 21. Servo electric cylinder; 22. Slide rail; 23. Controller; 3. Pressure plate; 31. Slider; 32. Second pressure sensor; 320. Fixing plate; 4. Horizontal seat; 41. First pressure sensor; 410. Bracket; 5. Vertical plate; 51. Threaded cylinder; 52. Clamping plate; 520. Fixing groove; 6. Protective plate; 61. Fixing block; 7. Electric push rod; 71. Moving plate; 8. Bidirectional threaded rod. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1 to 5 This utility model provides a vehicle roof rack load-bearing testing device, including...

[0025] Base 1 serves as the foundational support component of the device, providing a stable mounting platform for the entire testing apparatus. It can withstand dynamic loads, the weight of the luggage rack, and the forces exerted by various components during testing, preventing the device from wobbling due to an unstable foundation and ensuring the stability of the testing process. A horizontal seat 4 is installed on top of base 1. The horizontal seat 4 ensures that the first pressure sensor 41 and the bracket 410 on its top are in a horizontal state, ensuring the stability of subsequent support for the luggage rack and the accuracy of test data. The first pressure sensor 41 is also located on top of the horizontal seat 4, enabling real-time monitoring of the weight and dynamic loads of the luggage rack borne by the bracket 410. The pressure data transmitted to the bottom of the load is converted into an electrical signal and transmitted to the controller 23. The staff can use the controller 23 to understand the stress on the bottom of the luggage rack in real time, providing bottom stress data support for judging the load-bearing performance of the luggage rack, supplementing the top load test data, and making the test data more comprehensive. The top of the first pressure sensor 41 is equipped with a bracket 410 to support the car luggage rack, which can provide a suitable support surface according to the bottom structure of the luggage rack, avoiding excessive local stress on the bottom of the luggage rack and deformation. At the same time, the weight of the luggage rack and the dynamic load it receives are evenly transmitted to the first pressure sensor 41 to ensure the accuracy of pressure data monitoring.

[0026] The adjustable clamping component includes a groove 11 formed on the top of the base 1, which provides installation space for the bidirectional threaded rod 8. The bidirectional threaded rod 8 is disposed inside the groove 11. A servo motor module 12 is mounted on the side surface of the base 1, and the output shaft of the servo motor module 12 extends into the groove 11 and is connected to the bidirectional threaded rod 8. Two threaded cylinders 51 are threadedly connected to the bidirectional threaded rod 8 and are symmetrically distributed. The symmetrically distributed reverse threads on the bidirectional threaded rod 8 can drive the two threads under the drive of the servo motor module 12. The cylinders 51 move closer or further apart synchronously, providing a power transmission basis for adjusting the distance between the two clamping plates 52, and realizing the clamping adaptation for luggage racks of different widths. It is the core transmission component for adjusting the clamping parts to achieve flexible clamping. The vertical plate 5 is set on the top of the threaded cylinder 51, and the clamping plate 52 is set on the side surface of the vertical plate 5 and can clamp the car luggage rack. The vertical plate 5, as the intermediate component connecting the threaded cylinder 51 and the clamping plate 52, can convert the horizontal movement of the threaded cylinder 51 into the horizontal movement of the clamping plate 52, and at the same time provide vertical mounting support for the clamping plate 52.

[0027] In this embodiment, an electric push rod 7 is also provided inside the clamping plate 52, and the output end of the electric push rod 7 is connected to a movable plate 71. The electric push rod 7 can drive the movable plate 71 to perform telescopic movement. After the clamping plate 52 initially clamps the luggage rack, the movable plate 71 can move closer to the side wall of the luggage rack to achieve secondary clamping, enhance the clamping force, adapt to luggage rack side walls of different thicknesses, and avoid loosening of the clamping due to different thicknesses of the luggage rack side walls. At the same time, the telescopic amount of the electric push rod 7 can be precisely controlled to ensure that the clamping force is controllable and prevent excessive clamping from damaging the luggage rack.

[0028] In this embodiment, a protective plate 6 is also provided on the top of the clamping plate 52, and the protective plate 6 is located on the outside of the electric push rod 7. The protective plate 6 can shield and protect the electric push rod 7 inside the clamping plate 52.

[0029] In this embodiment, a fixing block 61 is also provided at the bottom of the guard plate 6, and a fixing groove 520 is formed at the top of the clamping plate 52 that is interference-fitted with the fixing block 61. This enables the guard plate 6 to be quickly positioned and installed on the top of the clamping plate 52 without the need for complicated installation tools. This facilitates the disassembly and maintenance of the guard plate 6, while ensuring that the guard plate 6 is stable after installation and will not shift during testing, thus ensuring the protection effect on the electric push rod 7.

[0030] In this embodiment, a gantry 2 is also installed on the top of the base 1. The gantry 2 provides a stable top mounting support structure for the servo electric cylinder 21. Its frame structure can withstand the reaction force generated when the servo electric cylinder 21 is working, and avoid the shaking of the top load application component. The servo electric cylinder 21 installed on the top of the gantry 2 can provide precise thrust and telescopic speed control, and can simulate the vertical dynamic load on the luggage rack under driving conditions. By adjusting the output parameters of the servo electric cylinder 21, loads of different sizes and frequencies can be applied.

[0031] In this embodiment, the output end of the servo electric cylinder 21 is connected to a pressure plate 3. The pressure plate 3 can evenly transmit the thrust of the servo electric cylinder 21 to the second pressure sensor 32 and the fixing plate 320, avoiding direct contact between the output end of the servo electric cylinder 21 and the luggage rack, which would cause excessive local stress. The bottom of the pressure plate 3 is provided with a second pressure sensor 32, and the bottom of the second pressure sensor 32 is provided with a fixing plate 320. The second pressure sensor 32 can monitor the load transmitted by the servo electric cylinder 21 to the top of the luggage rack through the pressure plate 3 in real time, and convert the load signal into an electrical signal and transmit it to the controller 23. The staff can monitor in real time whether the load applied to the top meets the test requirements through the controller 23, ensuring the accuracy of load application and providing direct data basis for judging the load-bearing capacity of the top of the luggage rack. The fixing plate 320 is in direct contact with the top of the luggage rack, and its flat contact surface can ensure that the top load is evenly transmitted to the luggage rack, avoiding local stress concentration caused by the second pressure sensor 32 directly contacting the luggage rack, and protecting the top surface of the luggage rack from damage.

[0032] In this embodiment, a slider 31 is provided on the side surface of the pressure plate 3, and a groove 22 is provided on the inner side of the gantry 2 for the slider 31 to slide, which guides the up and down movement of the pressure plate 3, prevents the pressure plate 3 from shifting laterally under the drive of the servo electric cylinder 21, and ensures that the pressure plate 3 always moves in the vertical direction, so that the top load is accurately applied to the preset position of the luggage rack, avoiding test data deviation due to the offset of the pressure plate 3, and reducing the frictional resistance when the pressure plate 3 moves, thus improving the stability of the movement; a controller 23 is installed on the front surface of the gantry 2. The controller 23 can receive signals transmitted by the first pressure sensor 41 and the second pressure sensor 32, and control the working status of the servo motor module 12, the electric push rod 7, and the servo electric cylinder 21. The operator can set test parameters, start / stop the test, and view real-time test data through the operation interface of the controller 23, realizing automated control and data visualization of the test process, improving the convenience and efficiency of the test operation.

[0033] The working principle and usage process of this invention are as follows: Place the car roof rack to be tested on the bracket 410, turn on the power of the device through the controller 23, and check whether the first pressure sensor 41, the second pressure sensor 32 and other components are working properly.

[0034] Start the servo motor module 12 on the controller 23 to drive the bidirectional threaded rod 8 to rotate, which in turn drives the threaded cylinder 51, the vertical plate 5 and the clamping plate 52 to approach the luggage rack for initial clamping; then start the electric push rod 7 to push the moving plate 71 to clamp the luggage rack a second time until the pressure sensor shows that the clamping force is up to standard.

[0035] The load parameters of the servo electric cylinder 21 are set by the controller 23, the servo electric cylinder 21 is started, and the pressure plate 3 and the fixing plate 320 are pushed to apply dynamic load to the luggage rack. The first and second pressure sensors and displacement-related data are viewed in real time through the controller 23.

[0036] After the test is completed, the controller 23 sequentially controls the electric push rod 7 to retract and the servo motor module 12 to reverse so that the clamping plate 52 moves away from the luggage rack and the luggage rack is removed.

[0037] Although embodiments of the present invention have been shown and described (see the detailed description above), 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 load-bearing capacity testing device for automobile roof racks, characterized in that: include The base (1) has a horizontal seat (4) installed on its top. A first pressure sensor (41) is provided on the top of the horizontal seat (4). A bracket (410) supporting the car roof rack is provided on the top of the first pressure sensor (41). The adjustable clamping component includes a groove (11) opened on the top of the base (1), a bidirectional threaded rod (8) disposed inside the groove (11), a servo motor module (12) mounted on the side surface of the base (1), and the output shaft of the servo motor module (12) extends into the inside of the groove (11) and is connected to the bidirectional threaded rod (8), two threaded cylinders (51) threadedly connected to the bidirectional threaded rod (8), and the two threaded cylinders (51) are symmetrically distributed, a vertical plate (5) disposed on the top of the threaded cylinders (51), and a clamping plate (52) disposed on the side surface of the vertical plate (5) and capable of clamping the car roof rack.

2. The vehicle roof rack load-bearing testing device according to claim 1, characterized in that: It also includes an electric push rod (7) disposed inside the clamping plate (52), and the output end of the electric push rod (7) is connected to a moving plate (71).

3. The vehicle roof rack load-bearing testing device according to claim 2, characterized in that: It also includes a guard plate (6) disposed on the top of the clamping plate (52), and the guard plate (6) is located outside the electric push rod (7).

4. The vehicle roof rack load-bearing testing device according to claim 3, characterized in that: It also includes a fixing block (61) located at the bottom of the guard plate (6) and a fixing groove (520) located at the top of the clamping plate (52) that is adapted to the fixing block (61).

5. The vehicle roof rack load-bearing testing device according to claim 1, characterized in that: It also includes a gantry (2) mounted on the top of the base (1) and a servo electric cylinder (21) mounted on the top of the gantry (2).

6. The vehicle roof rack load-bearing testing device according to claim 5, characterized in that: The output end of the servo electric cylinder (21) is connected to a pressure plate (3), and a second pressure sensor (32) is provided at the bottom of the pressure plate (3), and a fixing plate (320) is provided at the bottom of the second pressure sensor (32).

7. The vehicle roof rack load-bearing testing device according to claim 6, characterized in that: The side surface of the pressure plate (3) is provided with a slider (31), the inner side of the gantry (2) is provided with a slide groove (22) for the slider (31) to slide, and the front surface of the gantry (2) is equipped with a controller (23).

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