A bench test tool for quick reconstruction of automobile door slope working condition

Abstract

The utility model relates to a kind of test bench tool for the slope condition of quick reconstruction of automobile door, and the tool is used in the technical field of automobile testing, including simulation door frame (6), vehicle body mounting plate (3), slope adjusting bottom plate (5), three-way adjustable counterweight (1) and two-way bolt type slope locking mechanism.Simulation door frame is hinged to vehicle body mounting plate by upper and lower connecting hinges (2,4), forming rotating shaft (303) coinciding with the hinge axis of real vehicle;Slope adjusting bottom plate is provided with front and rear, left and right bolt slot (306,307), and fast pull bolt (302,301) can be locked in ±30% front and rear, ±20% left and right tilt range;Counterweight is adjusted by X / Y / Z direction adjustment slot (201,202,203) to realize three-way stepless adjustment of mass and gravity center, and keep consistent with the measured door;Double-shaft digital slope indicator (304,305) displays slope in real time.The tool as a whole can complete the reconstruction of door slope condition on ordinary test bench, without lifting the whole vehicle, saving space, safe operation, suitable for reliability test of door limiter, hinge and other components.

Description

Technical Field

[0001] This utility model relates to the field of automotive door system testing technology, and in particular to a testing fixture for quickly reproducing the front-to-back ±30% and left-to-right ±20% slope conditions of a car door on a test bench, and for conducting durability, sinking and opening force tests on components such as limiters and hinges. Background Technology

[0002] Currently, the mainstream approach to verifying the reliability of components such as door limiters and hinges under different inclines is to lift the entire vehicle to the target angle using a steel structure platform, jacks, or a lifting platform. This method has the following drawbacks:

[0003] 1) It occupies a large space, requires large ramps or lifting equipment, and has a long test preparation cycle;

[0004] 2) The vehicle has a high center of gravity, posing a risk of tipping over during adjustment and locking, resulting in poor operational safety;

[0005] 3) The slope adjustment resolution is low and the repeatability accuracy is poor, making it difficult to quickly reproduce the same slope state;

[0006] 4) It is impossible to accurately simulate the mass and center of gravity of the car door separately, resulting in a large deviation between the test data and the actual vehicle.

[0007] Therefore, there is an urgent need for a testing device that can be completed on a test bench without the involvement of the entire vehicle, and can simultaneously achieve three-way adjustment of door mass / center of gravity and two-way rapid switching of slope, in order to improve testing efficiency, accuracy and safety. Utility Model Content

[0008] This invention addresses the shortcomings of existing vehicle lifting methods, such as large space occupation, high operational risks, poor slope reproduction accuracy, and inability to accurately simulate the mass and center of gravity of car doors. It provides a bench test fixture for rapid reconstruction of car door slope conditions. Through an integrated design of "simulated door frame + three-way adjustable counterweight + pin-type bidirectional slope adjustment + digital display slope meter," this fixture can quickly and accurately switch between front-to-back ±30% and left-to-right ±20% slope conditions on the bench, ensuring that the door mass and center of gravity are consistent with the actual vehicle. This allows for highly repeatable, safe, and efficient reliability testing of components such as limiters and hinges.

[0009] To achieve the above objectives, this utility model is implemented as follows:

[0010] A bench test fixture for rapid reconstruction of automotive door slope conditions includes:

[0011] The simulated door frame (6), as a "substitute" for the car door, is coaxially hinged to the vehicle body mounting plate (3) via the upper connecting hinge (2) and the lower connecting hinge (4), forming a front and rear tilt slope adjustment rotation axis (303) that coincides with the hinge axis of the real vehicle.

[0012] The slope adjustment base plate (5) is fixed to the vehicle mounting plate (3). The plate surface is provided with front and rear tilt slope adjustment pin slots (306) and left and right tilt slope adjustment pin slots (307), which are quickly inserted and removed from the front and rear tilt slope adjustment pins (302) and left and right tilt slope adjustment pins (301), respectively, so that the simulated door frame (6) can be independently locked in a gear within the range of ±30% front and rear tilt and ±20% left and right tilt.

[0013] The counterweight (1) is movable and lockable in three directions via the counterweight X-direction position adjustment steel groove (201), the counterweight Y-direction position adjustment groove (202), and the counterweight Z-direction position adjustment shaft (203). The weight can be changed as needed to ensure that it is consistent with the actual door weight and center of gravity coordinates.

[0014] The front and rear slope measuring instrument (304) and the left and right slope measuring instrument (305) display the current slope in real time with an accuracy of ≤0.1°.

[0015] Limiter mounting clip (7), position adjustable, used to fix the limiter or hinge under test, to realize tests such as opening and closing durability, sinking amount, opening force, etc.

[0016] Therefore, the entire tooling can quickly reconstruct the door's slope condition on the test bench without lifting the entire vehicle, and complete the testing of related components.

[0017] further:

[0018] The front and rear tilting pin slots (306) and the left and right tilting pin slots (307) are arranged at equal intervals to achieve slope leveling and repeated locking.

[0019] The counterweight (1) is equipped with a scale and a quick-lock handle. It can be locked by rotating ≤90° in one go. The center of gravity adjustment can be quantified and recorded.

[0020] The dual-axis digital display inclinometer is directly installed on the simulated gate frame (6) to form a closed-loop slope setting, ensuring the consistency of the test.

[0021] The coaxial design of the upper and lower hinges ensures that the rotation axis of the simulated door frame coincides with the axis of the actual vehicle door hinge, making the test data closer to that of the actual vehicle.

[0022] The limiter mounting clip (7) is adjustable along the frame, compatible with multiple vehicle interfaces, and expands the tooling versatility.

[0023] A reinforcing rib is provided between the slope adjustment base plate (5) and the vehicle body mounting plate (3), and the elastic deformation under the maximum tilt angle is <0.05°, which improves the rigidity of the system.

[0024] The pin adopts a quick-release spring pin with a tapered guide section, enabling one-handed operation and automatic centering, with a slope change time of less than 10 seconds.

[0025] The simulated door frame (6) profile has a pre-set cable tray inside, and the slope meter cable is completely hidden, eliminating the risk of test interference.

[0026] All three adjustment slots / shafts are equipped with quick-lock handles for easy and rapid adjustment of the center of gravity.

[0027] This utility model adopts the above-mentioned design, which synchronously reproduces the mass and center of gravity of the car door by "simulating the door frame + three-way adjustable counterweight", and quickly locks the front and rear ±30% and left and right ±20% working conditions with the pin-type two-way slope groove, eliminating the need to lift the whole vehicle; the upper and lower hinges are coaxial to ensure that the rotation reference is consistent with the actual vehicle, and with the real-time reading of the digital slope meter, it realizes the second-level reconstruction and visual precise positioning of the bench-level slope working conditions.

[0028] Furthermore, the frame incorporates built-in wiring channels, quick-lock handles, and modular mounting clips, balancing safety with universal maintenance; a reserved data interface allows direct connection to a data acquisition system, enabling synchronous recording of slope, force, and displacement to meet subsequent digital twin requirements. The overall structure is compact and safe to operate, significantly saving space and preparation time, and can be widely used for reliability verification of components such as door limiters and hinges. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the bench testing fixture of this utility model.

[0030] Figure 2 This is a schematic diagram of the three-way adjustment structure of the counterweight in the test fixture of this utility model.

[0031] Figure 3 This is a schematic diagram of the slope adjustment and measurement structure in the test bench fixture of this utility model. Detailed Implementation

[0032] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0033] A bench test fixture for rapid reconstruction of automotive door slope conditions, such as Figure 1As shown, the test bench fixture mainly consists of a simulated door frame (6), a vehicle body mounting plate (3), and a slope adjustment base plate (5) from top to bottom. The simulated door frame (6) is hinged to the vehicle body mounting plate (3) via an upper connecting hinge (2) and a lower connecting hinge (4) arranged coaxially, forming a front and rear tilt slope adjustment rotation axis (303). This axis coincides with the axis of the actual vehicle door hinge, ensuring that there is no additional torque error in subsequent tests. The vehicle body mounting plate (3) is fixed to the slope adjustment base plate (5) by four corner bolts. The base plate has U-shaped installation notches at the four corners, which can be quickly fixed into the T-slots of the universal test bench.

[0034] See Figure 2 The counterweight (1) is installed on the back of the simulated door frame (6) via a three-way adjustment mechanism:

[0035] The counterweight X-direction position adjustment steel channel (201) is arranged laterally along the frame for left and right movement;

[0036] The counterweight Y-axis position adjustment groove (202) is arranged longitudinally along the frame for forward and backward movement;

[0037] The Z-axis position adjustment shaft (203) of the counterweight is arranged vertically for vertical movement.

[0038] Each groove / shaft surface is laser-machined with graduations and equipped with a quick-lock handle; a single 90° rotation is sufficient to lock or release. The counterweight (1) itself is a stepped mass block (standard 5 kg, 10 kg, 20 kg), which can be stacked as needed to ensure that the total mass and three-dimensional center of gravity coordinates are consistent with the target vehicle door. After adjustment, record the graduation values; the results can be directly reproduced in the next test of the same vehicle model.

[0039] See Figure 3 Two sets of arc-shaped pin slots are machined on the slope adjustment base plate (5):

[0040] The front and rear tilt slope adjustment pin slots (306) are evenly distributed in increments of 5% within a ±30% slope range, with the rotation shaft (303) as the center.

[0041] The left and right tilt slope adjustment pin slots (307) are evenly distributed in increments of 5% within a slope range of ±20%, with the geometric center of the upper surface of the base plate as the center.

[0042] Both the front and rear tilt adjustment pins (302) and the left and right tilt adjustment pins (301) are quick-release spring pins with tapered guide sections at the pin heads, allowing for insertion and removal with one hand. To adjust, first pull out the corresponding pin, rotate the frame to the target mark, and then release the lever to automatically center and lock it in place. The entire process requires no tools.

[0043] The front and rear tilt angle slope measuring instrument (304) and the left and right tilt angle slope measuring instrument (305) are fixed to the top crossbeam of the simulated door frame (6) by bolts. The dual-axis digital display tilt meter has an accuracy of 0.1° and comes with an RS-485 interface, which can send the slope value to the external data acquisition system in real time to realize the synchronous recording of slope-force-displacement.

[0044] The limiter mounting clip (7) is connected to the side of the simulated door frame (6) through an elongated hole and a T-nut. The vertical travel is adjustable from 0 to 120 mm, and it is equipped with a replaceable bushing to accommodate limiter or hinge mounting hole spacing of different vehicle models. After installation, tests such as opening and closing durability, sinking, and opening force can be performed according to the test specifications.

[0045] Based on the actual door mass and center of gravity data, select the number of counterweights (1) and adjust the three-way groove / shaft to the corresponding scale, then lock the quick lock handle;

[0046] Pull out the front and rear tilt adjustment pin (302), rotate the simulated door frame (6) to the target slope, and insert the pin to lock; similarly complete the left and right tilt adjustment.

[0047] Read the slope from the front and rear tilt angle measuring instrument (304) and the left and right tilt angle measuring instrument (305) to confirm the slope;

[0048] Mount the limit switch or hinge to be tested onto the limit switch mounting clip (7) and connect the external sensor to the data acquisition system;

[0049] The actuator (cylinder or motor) is activated to conduct a door opening and closing cycle test, and the system automatically records the slope, force value and displacement.

[0050] Regarding this embodiment, the following alternative solutions are further provided:

[0051] 1) The pin slot can be replaced with a worm gear for continuous adjustment, which is suitable for stepless slope requirements;

[0052] 2) A bubble level can be used for the slope meter to reduce costs;

[0053] 3) The counterweight can be filled with lead pellets to achieve stepless weight adjustment.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A bench test fixture for rapid reconstruction of automotive door slope conditions, characterized in that, include: Simulated door frame (6); Body mounting plate (3) is used for rigid connection with external frame or body; The upper connecting hinge (2) and the lower connecting hinge (4) are used to hinge the simulated door frame (6) to the vehicle body mounting plate (3), so that the simulated door frame (6) can rotate relative to the vehicle body mounting plate (3) about the front and rear tilt slope adjustment rotation axis (303). The slope adjustment base plate (5) is provided with front and rear tilt slope adjustment pin grooves (306) and left and right tilt slope adjustment pin grooves (307); The front and rear tilt slope adjustment pins (302) and the left and right tilt slope adjustment pins (301) respectively cooperate with the corresponding pin slots (306, 307) to quickly lock the simulated door frame (6) at the target front and rear tilt angle and / or left and right tilt angle; The counterweight (1) is installed on the simulated door frame (6) through the counterweight X-direction position adjustment steel groove (201), the counterweight Y-direction position adjustment groove (202) and the counterweight Z-direction position adjustment shaft (203) to achieve stepless movement and locking in the X, Y and Z directions, so as to keep the mass and center of gravity of the actual vehicle door consistent. The front and rear tilt slope measuring instrument (304) and the left and right tilt slope measuring instrument (305) are fixed to the simulated gate frame (6) and are used to display the current slope value in real time; Limiter mounting clip (7) is set on the simulated door frame (6) for installing the door limiter or hinge under test; This enables rapid reconstruction and testing of door slope conditions on a test bench without lifting the entire vehicle.

2. The bench testing fixture for rapid reconstruction of automotive door slope conditions according to claim 1, characterized in that: The forward and backward tilt slope adjustment pin slots (306) are arranged at equal intervals along a slope range of ±30%, and the left and right tilt slope adjustment pin slots (307) are arranged at equal intervals along a slope range of ±20%, so as to realize independent bidirectional slope adjustment.

3. The bench testing fixture for rapid reconstruction of automotive door slope conditions according to claim 1 or 2, characterized in that: The counterweight (1) is a replaceable mass block, and the X-axis position adjustment steel groove (201), the Y-axis position adjustment groove (202), and the Z-axis position adjustment shaft (203) of the counterweight are all equipped with scales for quantitative recording of the center of gravity coordinates.

4. The bench testing fixture for rapid reconstruction of automotive door slope conditions according to claim 1, characterized in that: The front and rear slope measuring instruments (304) and the left and right slope measuring instruments (305) are digital display inclinometers with an accuracy of ≤0.1° to ensure the accuracy of slope reproduction.

5. The bench testing fixture for rapid reconstruction of automotive door slope conditions according to claim 1, characterized in that: The upper connecting hinge (2) and the lower connecting hinge (4) are arranged coaxially to form the front and rear tilt slope adjustment rotation axis (303), ensuring that the front and rear tilt rotation axis of the simulated door frame (6) is consistent with the axis of the actual vehicle door hinge.

6. The bench testing fixture for rapid reconstruction of automotive door slope conditions according to claim 1, characterized in that: The mounting position of the limiter mounting clip (7) on the simulated door frame (6) is adjustable to accommodate limiter / hinge interfaces of different vehicle models.

7. The bench test fixture for rapid reconstruction of automotive door slope conditions according to claim 1, characterized in that: A reinforcing rib is provided between the slope adjustment base plate (5) and the vehicle body mounting plate (3) to improve overall rigidity and reduce elastic deformation under the maximum left and right tilt angle.

8. The bench test fixture for rapid reconstruction of automotive door slope conditions according to claim 1 or 7, characterized in that: Both the front and rear tilt slope adjustment pins (302) and the left and right tilt slope adjustment pins (301) are quick-release spring pins with tapered guide sections at the ends of the pins to enable one-handed operation and automatic centering and locking.

9. The bench testing fixture for rapid reconstruction of automotive door slope conditions according to claim 1, characterized in that: The simulated door frame (6) has a cable tray in its profile cavity to hide the power and signal lines of the front and rear tilt angle measuring instrument (304) and the left and right tilt angle measuring instrument (305) to avoid cable interference during the test.

10. The bench test fixture for rapid reconstruction of automotive door slope conditions according to claim 1 or 3, characterized in that: The counterweight X-axis position adjustment steel channel (201), the counterweight Y-axis position adjustment slot (202), and the counterweight Z-axis position adjustment shaft (203) are all equipped with quick-lock handles. A single rotation of ≤90° can lock or release the counterweight, shortening the center of gravity adjustment time.

Images