High and low temperature endurance test bench for automobile door lock

Abstract

The utility model provides a high and low temperature endurance test bench for an automobile door lock, which relates to the technical field of automobile workpiece tests and comprises an electrical control cabinet and a test mounting rack, bearing test racks are arranged at the centers of two side surfaces of the test mounting rack, and test side doors are hinged to the side surfaces of the bearing test racks. One side of the surface of the test side door is bolted with a vehicle body door lock mechanism, the other side surface of the test side door is horizontally bolted with a first cylinder, the surface of the vehicle body door lock mechanism is provided with a door lock pull ring, and a door lock pull rope, a door lock pull rope driven by the cylinder and a test side door opening and closing mechanism are arranged between the door lock pull ring and the movable end of the first cylinder. The device can accurately simulate the use scene of an actual door lock, and is matched with the movable sleeving connection of the positioning shaft seat and the connecting ring, thereby guaranteeing the stability of a motion track, remarkably reducing the manual intervention, improving the testing efficiency and data consistency, and improving the testing precision. The stable structure of the test installation rack and the flexible control system enable the test installation rack to adapt to the test requirements of vehicle door locks of different vehicle types.

Description

Technical Field

[0001] This utility model relates to the field of automotive workpiece testing technology, and in particular to a high and low temperature durability testing bench for automotive door locks. Background Technology

[0002] According to Chinese Publication No. CN212482914U, an automotive door lock testing bench includes a base. Self-locking casters are fixedly installed at the four corners of the base's bottom wall. Support rods are fixedly connected to the four corners of the base's top wall. A housing is fixedly connected to the top walls of the four support rods. A first mounting groove is formed in the middle of both sides of the base's top wall. First pulleys are symmetrically arranged on both sides of the first mounting groove. Two first pulleys are connected by a first track sleeved on their outer sides. Downward-facing infrared transceiver modules are fixedly installed on the bottom walls of two mounting frames. Blowers are installed on the inner walls of the four support rods. A logic controller is fixedly installed on the outer wall of one of the support rods. This automotive door lock testing bench is designed based on a single-chip microcomputer system logic control structure. It can perform water-based testing on the external coating stability of the final door lock product, and perform water-based cleaning on the exterior of the door lock and even the interior of the lock cylinder, thereby achieving the qualified stability of the final door lock product.

[0003] The aforementioned patent documents and existing technologies contain traditional testing equipment that relies heavily on manual operation or simple mechanical drive, making it difficult to accurately simulate the complex actions of car door locks in actual use. Furthermore, manual operation is prone to introducing errors, making it difficult to meet the needs of large-scale, long-term high and low temperature durability testing. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of insufficient accuracy and low efficiency in existing automotive door lock testing technologies, and to propose a high and low temperature durability testing bench for automotive door locks.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high and low temperature durability test bench for automobile door locks, comprising an electrical control cabinet and a test mounting frame. A load-bearing test frame is provided at the center of both sides of the test mounting frame. A horizontal mounting frame is provided between adjacent load-bearing test frames. A test side door is hinged to the side of the load-bearing test frame. A vehicle door lock mechanism is bolted to the side of the test side door away from the load-bearing test frame. A first cylinder is horizontally bolted to the other side of the test side door. A door lock pull ring is provided on the surface of the vehicle door lock mechanism. A door lock pull rope is provided between the door lock pull ring and the movable end of the first cylinder.

[0006] Preferably, the test side door surface is provided with a side door truss, the side door truss surface is screwed with a positioning shaft seat, the mounting crossbeam surface is provided with a second cylinder, the movable end of the second cylinder is provided with a connecting ring, and the connecting ring is movably sleeved with the positioning shaft seat surface.

[0007] Preferably, both the second cylinder and the first cylinder are provided with cylinder supports on their outer edges, and the two cylinder supports are respectively bolted to the test side door surface and the mounting crossbeam surface.

[0008] Preferably, the test side door is provided with a double-sided hinge at the connection position with the load-bearing test frame, and the test side door is provided with limiting tension springs connected to the surface of the load-bearing test frame near the top and bottom.

[0009] Preferably, the test side doors are symmetrically distributed along the center of the load-bearing test frame on both sides of the test mounting platform, and the electrical control cabinet is electrically connected to both the first cylinder and the second cylinder.

[0010] Preferably, the load-bearing test frame is perpendicular to the bottom surface of the test mounting platform, and both ends of the load-bearing test frame are welded to the surface of the test mounting platform, and both ends of the mounting crossbeam are welded to the surface of the test mounting platform.

[0011] Preferably, the two ends of the side door truss are horizontally welded to the surface of the test side door, the vertical sides of the test side door are parallel to the load-bearing test frame, and the height of the test side door is less than the vertical height between the top and bottom surfaces of the test mounting platform.

[0012] Beneficial effects

[0013] In this invention, through the electrical connection between the electrical control cabinet and the first and second cylinders, combined with the symmetrical distribution of the test side door and the precise design of double-sided hinges and limiting springs, a high degree of automation and precise control of the high and low temperature durability test of automotive door locks is achieved. The cylinder-driven door lock pull rope and the test side door opening and closing mechanism can accurately simulate the actual use scenario of automotive door locks. With the movable sleeve of the positioning shaft seat and the connecting ring, the stability of the movement trajectory is ensured. The welded and fixed load-bearing test frame and mounting crossbeam further enhance the structural rigidity and durability of the test bench in extreme high and low temperature environments, avoiding deformation or loosening caused by thermal expansion and contraction, significantly reducing manual intervention, improving test efficiency and data consistency. It is used for durability tests that require long-term operation. The stable structure and flexible control system of the test mounting frame enable it to adapt to the door lock testing needs of different car models, providing a reliable testing platform for the automotive manufacturing industry, reducing R&D costs, and improving product quality. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a diagram of the test side door connection structure of this utility model;

[0016] Figure 3 This is a structural diagram of the test side door of this utility model;

[0017] Figure 4 This is a structural diagram of the side door connection of the test installation platform of this utility model;

[0018] Figure 5 This is a diagram of the surface joint connection structure of the test installation platform of this utility model.

[0019] Legend:

[0020] 1. Electrical control cabinet; 2. Test mounting stand; 3. Test side door; 4. Mounting crossbeam; 5. Cylinder support; 6. Load-bearing test frame; 7. Body door lock mechanism; 8. Door lock pull ring; 9. First cylinder; 10. Door lock pull rope; 11. Second cylinder; 12. Connecting ring; 13. Positioning shaft seat; 14. Limiting tension spring; 15. Double-sided hinge; 16. Side door truss. Detailed Implementation

[0021] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0022] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0024] Reference Figures 1 to 5A high and low temperature durability test bench for automotive door locks includes an electrical control cabinet 1 and a test mounting frame 2. Load-bearing test frames 6 are located at the center of both sides of the test mounting frame 2. A horizontal mounting frame 4 is provided between adjacent load-bearing test frames 6. Test side doors 3 are hinged to the sides of the load-bearing test frames 6. A vehicle door lock mechanism 7 is bolted to the side of the test side door 3 away from the load-bearing test frames 6. A first cylinder 9 is horizontally bolted to the other side of the test side door 3. A door lock pull ring 8 is provided on the surface of the vehicle door lock mechanism 7. A door lock pull rope 10 is provided between the door lock pull ring 8 and the movable end of the first cylinder 9. The test mounting frame 2 serves as the main support structure, with the load-bearing test frames 6 on both sides positioned at their centers to support the test side doors 3. The test side doors 3 are connected to the load-bearing test frames 6 by hinges. Next, simulating the opening and closing of a car door, the door lock mechanism 7 is fixed to the test side door 3 and connected to the movable end of the first cylinder 9 via the door lock pull ring 8 and door lock pull rope 10. The first cylinder 9 provides pulling force, driving the door lock pull rope 10 to pull the door lock pull ring 8, thereby realizing the unlocking action of the car door lock, simulating the mechanical action in actual use. During the test, the electrical control cabinet 1 controls the action of the first cylinder 9. The extension and retraction of the cylinder drives the door lock pull rope 10, applying pulling force to the door lock pull ring 8, completing the lock opening and closing test. Through multiple cycles of action, the durability and reliability of the car door lock are tested in high and low temperature environments. It can accurately simulate the actual use scenario of the car door lock. The cylinder drive realizes automated testing, reduces manual operation, and improves testing efficiency and consistency. The stable design of the load-bearing test frame 6 and the mounting crossbeam 4 ensures the structural stability of the test bench in high and low temperature environments, providing reliable support for long-term durability testing.

[0025] A side door truss 16 is horizontally mounted on the surface of the test side door 3. A positioning shaft seat 13 is screwed onto the surface of the side door truss 16. A second cylinder 11 is mounted on the surface of the mounting frame 4. A connecting ring 12 is provided at the movable end of the second cylinder 11, and the connecting ring 12 is movably sleeved with the surface of the positioning shaft seat 13. The side door truss 16 is horizontally fixed to the surface of the test side door 3. The positioning shaft seat 13 is fixed to the side door truss 16 by screws, which serves a positioning and guiding function. The second cylinder 11 on the mounting frame 4 is movably sleeved with the positioning shaft seat 13 through the connecting ring 12 at its movable end. The extension and retraction of the second cylinder 11 pushes or pulls the test side door 3 to realize the opening and closing movement of the side door. The movable connection between the connecting ring 12 and the positioning shaft seat 13 ensures the flexibility and stability of the movement. The electrical control cabinet 1 controls the extension and retraction of the second cylinder 11. The cylinder pushes the connecting ring 12, causing the test side door 3 to rotate around the hinge point to complete the opening and closing movement. The positioning shaft seat 13 restricts the movement trajectory of the side door to ensure the accuracy of the movement. During testing, the second cylinder 11 works in conjunction with the first cylinder 9 to control the opening and closing of the side door and the door lock action, simulating a complete vehicle door operation process. The arrangement of the side door truss 16 and the second cylinder 11 improves the control accuracy of the test side door 3's movement. The cooperation between the positioning shaft seat 13 and the connecting ring 12 reduces deviations and vibrations during movement, ensuring the reliability of the test results. The introduction of automated control further improves testing efficiency and is suitable for long-term durability testing in high and low temperature environments.

[0026] Both the second cylinder 11 and the first cylinder 9 have cylinder supports 5 on their outer edges. The two cylinder supports 5 are bolted to the surface of the test side door 3 and the surface of the mounting frame 4, respectively. The cylinder supports 5 serve as fixing devices for the first cylinder 9 and the second cylinder 11, and are firmly connected to the surfaces of the test side door 3 and the mounting frame 4 through bolting. The stable installation of the cylinder supports 5 ensures that the cylinders will not shift or shake during extension and retraction, thus guaranteeing the effective transmission of pulling and pushing forces to drive the door lock rope 10 or the movement of the test side door 3. During test operation, the cylinder supports 5 bear the reaction force generated when the cylinders work, distributing the force evenly to the test side door 3 or the mounting frame 4, maintaining the overall stability of the structure. The electrical control cabinet 1, through precise control of the cylinder movements and the fixing effect of the supports, achieves accurate operation of the door lock and side door, avoiding test deviations caused by vibration or loosening. The bolting method facilitates installation and maintenance, enhances the durability of the test bench, and adapts to long-term operation requirements in high and low temperature environments.

[0027] A double-sided hinge 15 is provided at the connection position between the test side door 3 and the load-bearing test frame 6. The test side door 3 is provided with limiting tension springs 14 near the top and bottom of the test side door, which are connected to the surface of the load-bearing test frame 6. The double-sided hinge 15 allows the test side door 3 to rotate flexibly around the load-bearing test frame 6, simulating the opening and closing action of a car door. The limiting tension springs 14 are connected to the surface of the load-bearing test frame 6 near the top and bottom of the test side door, providing spring tension when the side door is opened and closed, limiting the opening and closing angle of the side door, preventing excessive rotation or impact, and assisting the side door to reset. When the second cylinder 11 drives the test side door 3 to open and close, the double-sided hinge 15 ensures the smoothness of movement, and the limiting tension springs 14 control the range of movement of the side door through tension. When the cylinder stops moving, the return force of the tension spring helps the side door return to its initial position, preparing it for the next test. The combined design of the double-sided hinge 15 and the limiting tension spring 14 ensures both the flexibility of opening and closing the test side door 3 and effectively controls the range of motion, preventing mechanical damage and improving the safety and stability of the test. The return function of the tension spring reduces the load on the cylinder and extends the service life of the equipment.

[0028] The test side doors 3 are symmetrically distributed along the center of the load-bearing test frames 6 on both sides of the test mounting platform 2. The electrical control cabinet 1 is electrically connected to both the first cylinder 9 and the second cylinder 11. The test side doors 3 are symmetrically distributed at the center of the load-bearing test frames 6 on both sides of the test mounting platform 2 to simulate the test requirements of the doors on both sides of an actual vehicle. The electrical control cabinet 1 controls the action of the first cylinder 9 and the second cylinder 11 through electrical connection, coordinating the pulling of the door lock rope 10 and the opening and closing of the test side doors 3 to realize the automated test process. The electrical control cabinet 1 sends instructions according to the preset program to drive the first cylinder 9 and the second cylinder 11 to perform the door lock opening and side door opening and closing actions respectively. The symmetrical distribution of the side doors ensures that the test conditions on both sides are consistent. The electrical control cabinet 1 ensures the accuracy and repeatability of the test by monitoring and adjusting the cylinder action in real time. The symmetrical distribution of the test side doors 3 improves the balance of the test and the comparability of the data. The automated control of the electrical control cabinet 1 reduces manual intervention, improves the test efficiency and accuracy, and meets the needs of large-scale durability testing.

[0029] The load-bearing test frame 6 is perpendicular to the bottom surface of the test mounting platform 2, and both ends of the load-bearing test frame 6 are welded to the surface of the test mounting platform 2. The two ends of the mounting crossbeam 4 are also welded to the surface of the test mounting platform 2. This welding method ensures a strong connection between the components, allowing them to withstand mechanical stress and environmental changes during high and low temperature tests. During the test, the load-bearing test frame 6 and the mounting crossbeam 4 jointly bear the weight and dynamic load of components such as the test side door 3 and the cylinder. The welded connection ensures the stability of the structure during repeated tests. The vertical and horizontal design optimizes the mechanical distribution, reducing the risk of deformation or loosening. The welded fixing method of the load-bearing test frame 6 and the mounting crossbeam 4 significantly enhances the overall rigidity and durability of the test platform, adapting to long-term operation in high and low temperature environments. The robust structural design reduces maintenance costs and improves the safety and reliability of the equipment.

[0030] The two ends of the side door truss 16 are horizontally welded to the surface of the test side door 3. The vertical sides of the test side door 3 are parallel to the load-bearing test frame 6, and the height of the test side door 3 is less than the vertical height between the top and bottom surfaces of the test mounting platform 2. The side door truss 16 is fixed to the surface of the test side door 3 by horizontal welding, providing a stable mounting base for components such as the positioning shaft seat 13. The parallelism between the vertical sides of the test side door 3 and the load-bearing test frame 6 ensures the smoothness and consistency of the opening and closing movements. The height of the test side door 3 is designed to be less than the vertical height of the test mounting platform 2, leaving space to avoid interference with the top or bottom surfaces of the platform and ensuring freedom of movement. During testing, the side door truss 16 is welded to the test side door 3 to form an integral part, enhancing the structural strength of the side door. The parallel design stabilizes the side door along the movement trajectory of the load-bearing test frame 6, and the height restriction avoids mechanical collisions, ensuring the smoothness and safety of the testing process. The welding and dimensional optimization of the side door truss 16 improves the structural stability and movement accuracy of the test side door 3 and reduces the risk of mechanical failure during testing. The reasonable height design enhances the safety of the equipment, makes it suitable for various car door lock testing scenarios, and improves the versatility of the test bench. Specific Implementation Example 2:

[0032] Reference Figures 1 to 5 Based on the content of the above specific embodiments, the following content is further disclosed:

[0033] Test installation stand 2 realizes the automated testing of various combinations of door lock actions, including external unlocking, internal unlocking, central locking, child safety, door opening and closing, etc., to verify its durability and functional stability in high and low temperature environments from -40℃ to 80℃, and to ensure that the test results are highly consistent with the actual use scenario;

[0034] Test equipment composition: Test mounting frame 2: adopts aluminum profile frame structure, size 600×1000×80mm, foundation weight ≤16kg, including door lock operating device and clamp. One end of the door is fixed by a hinge designed by Xiongqiang Company, and the other end is equipped with a door lock or latch. The stiffness of the latch fixing device is 70N±5N;

[0035] Actuator: The internal unlocking mechanism consists of a first cylinder 9, a door lock rope 10, and a door lock ring 8; the external unlocking mechanism consists of a second cylinder 11 and a matching positioning shaft seat 13. The cylinder support 5 is bolted to the test side door 3 and the mounting crossbeam 4. The positioning shaft seat 13 is movably sleeved with the connecting ring 12 to ensure the accuracy of the action.

[0036] Computer control system: Embedded in the control panel, equipped with powerful system software, a fully localized Chinese human-computer interaction interface, and supports action combination editing.

[0037] Electrical control cabinet 1: steel frame structure, with casters at the bottom, integrated PLC, communicates with computer via shielded cable to control the movement of cylinders and motors;

[0038] Durability testing module: Supports manual / automatic mode, automatically counts the number of tests, ranging from 1 to 999,999, with an accuracy of ±1 test;

[0039] Signal control parameters:

[0040] Switch signals: 6 switch signals including half lock, full lock, reset, central control, child safety, and fully open, with a sampling frequency of 100Hz and an accuracy of ±0.1ms;

[0041] Action frequency: Adjustable range 0.5 to 5 times / second, default 2 times / second;

[0042] Number of tests: 1 to 999,999, automatic counting, accuracy ±1;

[0043] Wear parts monitoring: Cylinders, pull ropes and other wear parts are set to a number of uses, such as 50,000 times. After the number of uses is reached, an alarm will be set to prompt for replacement.

[0044] Anomaly detection: Real-time monitoring of signal feedback. If the half-lock, full-lock, or full-open signal is not triggered, the system determines that the function is abnormal, issues an audible and visual alarm, and stops the test.

[0045] Control Method: The test mounting platform 2 utilizes the Xiongqiang system software to achieve modular control of actions. The action modules include external unlocking, internal unlocking, central control, child safety, and door opening / closing, which are independent and can be combined arbitrarily. Operators edit the action sequence through a fully localized Chinese human-machine interface: "Central control → Child safety → External unlocking → Internal unlocking → Door opening / closing." The PLC in electrical control cabinet 1 receives computer commands and drives the first cylinder 9 and the second cylinder 11. Shielded wiring ensures stable signal transmission. After the action is completed, the system collects the switch signal and compares it with the expected value. Manual and automatic modes are supported. The number of actions and signal status of the test data are recorded in real time. The system supports automatic data saving after a sudden power outage, allowing testing to continue the next time the system is powered on.

[0046] Operating Logic: Operators select manual or automatic mode, set the action sequence and number of tests. In automatic mode, the system executes the following sequence: sending a central control signal, activating the central control module, detecting central control signal feedback, triggering the child safety signal, detecting the child safety signal, the first cylinder 9 driving the internal unlocking rope, detecting the half-lock / full-lock signal, the second cylinder 11 driving the test side door 3 to open and close, detecting the fully open signal. After each action, the system compares the switch signal; if an anomaly is detected (e.g., the fully open signal is not triggered), an audible and visual alarm is issued and the test is paused. The number of tests is automatically counted, and vulnerable parts are prompted for replacement after a set number of tests. The system supports 24-hour unattended operation and automatically recovers data after a power outage. Modular action control and shielded wire communication ensure high reliability and anti-interference capabilities for signal transmission. Flexible action combinations meet diverse testing needs and are adaptable to door lock testing of different vehicle models. Automatic counting, anomaly detection, and vulnerable part reminder functions improve testing efficiency and equipment maintenance convenience, reduce manual intervention, and ensure test consistency. The power outage recovery function and robust aluminum frame ensure long-term stability under high and low temperature environments, significantly enhancing the reliability and market competitiveness of the test bench. Specific Implementation Example 3:

[0048] Reference Figures 1 to 5 Based on the content of the above specific embodiments, the following content is further disclosed:

[0049] The test installation bench 2 was used to verify the ability of the car door lock to overcome resistance and unlock under icy conditions by applying a force of 600±10N, simulating the durability and functional stability under extreme low temperature conditions, and ensuring the reliability of the lock under harsh conditions.

[0050] Experimental equipment composition:

[0051] Test installation stand 2: aluminum profile frame structure, size 600×1000×80mm, foundation weight ≤16kg, including counterweights including one 5kg and two 2kg, adjustable within the range of 300×300mm, the door lock assembly is powered on according to the actual vehicle state, installed on rigid tooling, with a rigidity of 70N±5N;

[0052] Actuator: The first cylinder 9 drives the ice-breaking action, the second cylinder 11 controls the opening and closing of the door, the cylinder support 5 is bolted and fixed, and the double-sided hinge 15 and the limit spring 14 ensure that the door movement is controlled.

[0053] Computer control system: Embedded in the control panel, running the powerful system software, displaying force curves and signal status;

[0054] Electrical control cabinet 1: steel frame, with casters at the bottom, integrated force sensor and PLC, communicates with computer via shielded cable;

[0055] Durability testing module: Supports ice-breaking test cycles, automatically records force values, signals and action times, and allows for 1-999,999 test cycles;

[0056] Signal control parameters:

[0057] Ice-breaking force: 600±10N, applied at the height of the door lock's fish mouth, with an accuracy of ±5N;

[0058] Sealing reaction force: 150±5N, simulating the sealing state of a car door, with an accuracy of ±5N;

[0059] Switch signals: fully locked and fully open signals, sampling frequency 100Hz, accuracy ±0.1ms;

[0060] Motor stall time: ≤2 seconds;

[0061] Number of tests: 1 to 999,999, automatic counting, accuracy ±1;

[0062] Anomaly detection: If the fully open signal is not triggered within the set time, the unlocking is deemed to have failed, an audible and visual alarm is issued, and the test is stopped.

[0063] Control Method: The test bench uses a rigid door fixture with an aluminum profile frame structure. The door lock assembly is powered on as in the actual vehicle condition, applying a sealing reaction force of 150±5N and an ice-breaking force of 600±10N to the door fixture, sending an electric unlocking signal to drive the unlocking motor. If the latch is squeezed and does not pop out, and the fully open signal is not detected, the motor remains stalled in the unlocking direction. The first cylinder 9 starts the ice-breaking action, applying a pulling force to overcome the ice resistance. After detecting the fully open signal, the cylinder resets, the motor is de-energized, and the latch is pressed back to the fully locked position, completing one cycle. The Xiongqiang system software controls the cylinder and motor actions, monitors the force value and signal status in real time, and automatically records the data, including force value, action time, and signal status. It supports parameter shutdown and power failure recovery functions. The human-machine interface displays force curves and signal status for easy operator analysis. The computer control system coordinates the operation of the cylinder, motor, and force sensor. The force sensor provides real-time feedback on the ice-breaking force and sealing reaction force. The system verifies whether these are within the set ranges (600±10N and 150±5N). If the fully open signal is not triggered within the set time, the system extends the motor stall time to the upper limit, then alarms and stops. After each cycle, the data is stored in the database, supporting 24-hour unattended operation. The power outage recovery function ensures that the test continues from the last saved state. Precise force control and signal monitoring ensure the reliability of the ice-breaking test, while the high rigidity of the aluminum profile tooling (70N±5N) ensures test stability. Automated processes and data recording functions improve testing efficiency, while power outage recovery and alarm functions enhance operational safety. The system meets the stringent testing requirements of extreme low-temperature environments, providing accurate data for the durability verification of locks under harsh conditions.

[0064] In summary: By employing an electrical connection between the electrical control cabinet 1 and the first cylinder 9 and the second cylinder 11, combined with the symmetrical distribution of the test side door 3 and the precise design of the double-sided hinge 15 and the limiting tension spring 14, a high degree of automation and precise control of the high and low temperature durability test of automotive door locks is achieved. The cylinder-driven door lock pull rope 10 and the opening and closing mechanism of the test side door 3 can accurately simulate the actual usage scenario of automotive door locks. With the movable sleeve of the positioning shaft seat 13 and the connecting ring 12, the stability of the movement trajectory is ensured. The welded and fixed load-bearing test frame 6 and the mounting crossbeam 4 further enhance the structural rigidity and durability of the test bench in extreme high and low temperature environments, avoiding deformation or loosening caused by thermal expansion and contraction, significantly reducing manual intervention, improving test efficiency and data consistency, and making it suitable for durability tests that require long-term operation. The stable structure and flexible control system of the test mounting frame 2 enable it to adapt to the door lock testing needs of different vehicle models, providing a reliable testing platform for the automotive manufacturing industry, reducing R&D costs, and improving product quality.

[0065] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high and low temperature durability test bench for automobile door locks, comprising an electrical control cabinet (1) and a test mounting frame (2), characterized in that: The test mounting stand (2) has a load-bearing test frame (6) at the center of both sides. A horizontal mounting frame (4) is provided between adjacent load-bearing test frames (6). A test side door (3) is hinged to the side of the load-bearing test frame (6). A vehicle body door lock mechanism (7) is bolted to the side of the test side door (3) away from the load-bearing test frame (6). A first cylinder (9) is bolted to the other side of the test side door (3). A door lock pull ring (8) is provided on the surface of the vehicle body door lock mechanism (7). A door lock pull rope (10) is provided between the door lock pull ring (8) and the movable end of the first cylinder (9).

2. The high and low temperature durability test bench for automobile door locks according to claim 1, characterized in that: The test side door (3) is provided with a side door truss (16) on its surface. The side door truss (16) is provided with a positioning shaft seat (13) connected by screws on its surface. The mounting crossbeam (4) is provided with a second cylinder (11). The movable end of the second cylinder (11) is provided with a connecting ring (12), and the connecting ring (12) is movably sleeved with the surface of the positioning shaft seat (13).

3. The high and low temperature durability test bench for automobile door locks according to claim 2, characterized in that: The outer edges of the second cylinder (11) and the first cylinder (9) are provided with cylinder supports (5), and the two cylinder supports (5) are respectively bolted to the surface of the test side door (3) and the surface of the mounting crossbeam (4).

4. The high and low temperature durability test bench for automobile door locks according to claim 1, characterized in that: The test side door (3) is provided with a double-sided hinge (15) at the connection position with the load-bearing test frame (6), and the test side door (3) is provided with a limiting tension spring (14) connected to the surface of the load-bearing test frame (6) near the top and near the bottom.

5. A high and low temperature durability testing bench for automotive door locks according to claim 3, characterized in that: The test side door (3) is symmetrically distributed on the surface of the load-bearing test frame (6) on both sides of the test mounting frame (2). The electrical control cabinet (1) is electrically connected to the first cylinder (9) and the second cylinder (11).

6. The high and low temperature durability test bench for automobile door locks according to claim 1, characterized in that: The load-bearing test frame (6) is perpendicular to the bottom surface of the test mounting frame (2), and the two ends of the load-bearing test frame (6) are welded to the surface of the test mounting frame (2), and the two ends of the mounting crossbeam (4) are welded to the surface of the test mounting frame (2).

7. A high and low temperature durability testing bench for automotive door locks according to claim 2, characterized in that: The two ends of the side door truss (16) are horizontally welded to the surface of the test side door (3). The vertical sides of the test side door (3) are parallel to the load-bearing test frame (6), and the height of the test side door (3) is less than the vertical height between the top and bottom surfaces of the test mounting platform (2).

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