Automobile trunk lock detection equipment
By designing a car trunk lock testing device, and using a push-pull rod and a testing spring to simulate actual load, a high-precision automated measurement of the locking force of the lock tongue simulation rod and the motor pull force was achieved. This solved the problems of low accuracy and poor stability of existing testing methods, and ensured the accuracy and consistency of test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 三航达机电科技(苏州)有限公司
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-15
AI Technical Summary
Existing methods for detecting car trunk locks have low accuracy, are easily affected by human factors, and are difficult to accurately capture changes in force during the dynamic locking process, resulting in unstable test results.
A car trunk lock testing device was designed. By combining a push-pull rod, a detection spring, and a push-pull force sensor, it can achieve high-precision automated measurement of the lock tongue simulated rod in the half-lock and full-lock positions. Combined with the detection spring to simulate the actual load, it can verify the motor tension performance and eliminate human interference and working condition simulation distortion.
It achieves integrated automated evaluation of locking force and door lock system motor reliability, accurately captures force changes during dynamic locking, eliminates errors from manual recording and distortions from operating condition simulation, and ensures the accuracy and consistency of test results.
Smart Images
Figure CN224247282U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts manufacturing technology, specifically to automotive trunk lock testing equipment. Background Technology
[0002] During the production testing of car trunk locks, it is necessary to ensure that the locking force in the half-lock and fully-locked positions meets the design requirements. It is also necessary to verify that when the trunk door is in the half-locked state, the door lock system's motor can reliably pull it to the fully-locked position. However, existing testing methods typically employ mechanical force gauges and manual recording, resulting in low accuracy, difficulty in accurately capturing force changes during dynamic locking, and susceptibility to human factors, leading to unstable test results. Utility Model Content
[0003] The purpose of this invention is to provide a testing device for car trunk locks, which can realize the integrated automated evaluation of locking force and door lock system motor reliability, effectively eliminating test deviations caused by human interference and distortion of working condition simulation.
[0004] To achieve the above objectives, this utility model provides a car trunk lock detection device, comprising:
[0005] A fixed plate that moves in a controlled manner along the horizontal direction;
[0006] A fixed box is mounted on the fixed plate, and limit sleeves are provided on both sides of the fixed box.
[0007] A push-pull rod passes through the two limiting sleeves and the fixed box, with both ends of the push-pull rod extending out of the fixed box, and the axis of the push-pull rod is parallel to the moving direction of the fixed plate;
[0008] A detection spring is sleeved on the push-pull rod and one end of the detection spring is connected to the push-pull rod. The detection spring is located between the two limiting sleeves.
[0009] A push-pull force sensor is installed at one end of the push-pull rod;
[0010] A locking tongue analog rod is connected to one end of the push-pull rod;
[0011] The push-pull rod is configured to move in a controlled manner along its axis toward the latch analog rod.
[0012] Optionally, the vehicle trunk lock detection device further includes:
[0013] A full-lock push-in cylinder is mounted on the fixed plate. The movable end of the full-lock push-in cylinder is in contact with but not connected to the other end of the push-pull rod. When the lock tongue simulation rod is inserted into the half-lock position inside the trunk lock, it pushes the push-pull rod to continue moving forward, causing the lock tongue simulation rod to be inserted into the full-lock position inside the trunk lock.
[0014] Optionally, the vehicle trunk lock detection device further includes:
[0015] The support platform can be raised and lowered vertically.
[0016] A semi-lock push-in cylinder is mounted on the support platform. The movable end of the semi-lock push-in cylinder is connected to the bottom of the full-lock push-in cylinder. It is used to push the full-lock push-in cylinder and the fixed plate forward so that the lock tongue simulation rod is inserted into the semi-lock position in the trunk lock.
[0017] Optionally, a lifting cylinder is provided below the support platform, which is used to drive the fixed plate and the lock tongue simulation rod to move up and down.
[0018] Optionally, a first slide rail is provided on the support platform, and a first slider is provided on the bottom surface of the fixed plate. The first slide rail and the first slider cooperate to drive the fixed plate to move horizontally.
[0019] Optionally, the locking tongue simulation rod is mounted on the mounting plate, the mounting plate is connected to one end of the push-pull rod, the bottom surface of the mounting plate is provided with a second slider, the top surface of the fixed plate is provided with a second slide rail, and the second slide rail cooperates with the second slider to drive the mounting plate to move horizontally.
[0020] Optionally, a limit ring is provided at one end of the push-pull rod.
[0021] The beneficial effects of this invention are as follows: By applying two stages of thrust to the simulated latch rod, it is controlled to move to the half-lock and fully-locked positions respectively. By setting up a push-pull force sensor to measure the locking force of the simulated latch rod in the half-lock and fully-locked positions, high-precision automated measurement of the half-lock and fully-locked locking forces can be achieved, accurately capturing the nonlinear changes in force during dynamic locking and eliminating errors from manual recording. At the same time, when testing the motor of the door lock system, the actual load on the trunk door is simulated by detecting the spring compression resistance, and the motor's pulling performance is verified by whether the simulated latch rod can be pulled from the half-locked position to the fully-locked position. This ensures that the test conditions are consistent with the actual working conditions, realizing an integrated automated evaluation of the locking force and the reliability of the door lock system motor, effectively eliminating test deviations caused by human interference and distortion of working conditions simulation.
[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0023] Figure 1 This is a schematic structural diagram of a car trunk lock detection device according to an embodiment of the present invention;
[0024] Figure 2 This is a schematic structural diagram of the detection spring of a car trunk lock detection device according to an embodiment of the present invention;
[0025] In the diagram: 1. Fixing plate; 2. Fixing box; 3. Push-pull rod; 4. Detection spring; 5. Push-pull force sensor; 6. Lock tongue simulation rod; 7. Limiting sleeve; 8. Full lock push-in cylinder; 9. Support platform; 10. Half lock push-in cylinder; 11. Lifting cylinder; 12. First slide rail; 13. First slider; 14. Mounting plate; 15. Second slider; 16. Second slide rail; 17. Limiting ring. Detailed Implementation
[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on 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.
[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] 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. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0029] Please see Figure 1 and Figure 2 The preferred embodiment of this application shows a car trunk lock detection device including a fixed plate 1, a fixed box 2, a push-pull rod 3, a detection spring 4, a push-pull force sensor 5, and a lock tongue simulation rod 6. The fixed plate 1 moves in a controlled horizontal direction. The fixed box 2 is mounted on the fixed plate 1, and limit sleeves 7 are correspondingly provided on both sides of the fixed box 2. The push-pull rod 3 passes through the two limit sleeves 7 and the fixed box 2, and both ends of the push-pull rod 3 extend outside the fixed box 2. The axis of the push-pull rod 3 is parallel to the moving direction of the fixed plate 1. The detection spring 4 is sleeved on the push-pull rod 3, and one end of the detection spring 4 is connected to the push-pull rod 3. The detection spring 4 is located between the two limit sleeves 7. The push-pull force sensor 5 is located at one end of the push-pull rod 3, and the lock tongue simulation rod 6 is connected to one end of the push-pull rod 3. The push-pull rod 3 is configured to move in a controlled manner along its axis toward the lock tongue simulation rod 6.
[0030] According to the embodiment of this utility model, by applying two stages of thrust to the lock tongue simulation rod 6, it is controlled to move to the half-lock and fully-lock positions respectively. By setting a push-pull force sensor 5 to measure the locking force of the lock tongue simulation rod 6 in the half-lock and fully-lock positions, high-precision automated measurement of the half-lock and fully-lock locking forces can be achieved, accurately capturing the nonlinear changes in force during dynamic locking and eliminating manual recording errors. At the same time, when testing the motor of the door lock system, the actual load of the trunk door is simulated by detecting the compression resistance of the spring 4, and the motor's pulling performance is verified by whether the lock tongue simulation rod 6 can be pulled from the half-lock position to the fully-lock position. This ensures that the test conditions are consistent with the actual working conditions, realizing an integrated automated evaluation of the locking force and the reliability of the door lock system motor, effectively eliminating test deviations caused by human interference and distortion of working conditions simulation.
[0031] It should be noted that when the trunk lid is in the half-locked state, the door lock system's motor will automatically pull the trunk lid from the half-locked position to the fully locked position. Therefore, it is also necessary to test the pulling force of the door lock system motor to ensure that it can smoothly and securely close the trunk lid.
[0032] The following detailed description uses specific examples:
[0033] Specifically, please see Figure 1 and Figure 2 The car trunk lock testing equipment also includes a full-lock push-in cylinder 8, a support platform 9, and a half-lock push-in cylinder 10. The full-lock push-in cylinder 8 is mounted on the fixed plate 1, with its movable end contacting but not connected to the other end of the push-pull rod 3. The support platform 9 can move vertically up and down. The half-lock push-in cylinder 10 is mounted on the support platform 9, with its movable end connected to the bottom of the full-lock push-in cylinder 8. It is used to push the full-lock push-in cylinder 8 and the fixed plate 1 forward so that the lock tongue simulation rod 6 is inserted into the half-lock position within the trunk lock. When the lock tongue simulation rod 6 is inserted into the half-lock position within the trunk lock, the full-lock push-in cylinder 8 pushes the push-pull rod 3 forward, causing the lock tongue simulation rod 6 to be inserted into the full-lock position within the trunk lock.
[0034] During the locking force test, the half-lock push-in cylinder 10 drives the fixed plate 1 forward, causing the lock tongue simulation rod 6 to insert into the lock under test to the half-lock position. The push-pull force sensor 5 simultaneously records the half-lock locking force (the pushing force of the half-lock push-in cylinder 10 is transmitted to the push-pull force sensor 5 through the full-lock push-in cylinder 8 and the push-pull rod 3). Subsequently, the full-lock push-in cylinder 8 pushes the push-pull rod 3 forward to move the lock tongue simulation rod 6 into the full-lock position and collects the full-lock locking force (the pushing force of the full-lock push-in cylinder 8 is directly transmitted to the push-pull force sensor 5 through the push-pull rod 3). During the motor tension test, the lock tongue simulation rod 6 is first moved into the half-lock position by the half-lock push-in cylinder 10. Then, the door lock system motor is started. The motor pulls the lock tongue simulation rod 6, causing the push-pull rod 3 to compress the detection spring 4. If the displacement of the lock tongue simulation rod 6 reaches the full-lock position, the motor tension is deemed qualified. It should be noted that the movable end of the full-lock push-in cylinder 8 is in contact with but not connected to the other end of the push-pull rod 3. This is to prevent motion interference caused by the connection between the movable end of the full-lock push-in cylinder 8 and the push-pull rod 3 when the motor pulls the lock tongue simulation rod 6 and the push-pull rod 3 forward to compress the detection spring 4 for motor tension testing. Specifically, in this embodiment, the spring force of the detection spring 4, which simulates the actual load on the trunk door by compressing resistance, is 350N.
[0035] Please see Figure 1 and Figure 2 A lifting cylinder 11 is installed below the support platform 9. The lifting cylinder 11 is used to drive the fixed plate 1 and the lock tongue simulation rod 6 to move up and down. When the lock tongue simulation rod 6 is in a half-lock or full-lock state, the lifting cylinder 11 can drive the lock tongue simulation rod 6 to move downward and directly pull it out of the lock to unlock it for subsequent testing.
[0036] Specifically, please see Figure 1The support platform 9 is equipped with a first slide rail 12, and the bottom surface of the fixed plate 1 is equipped with a first slider 13. The first slide rail 12 and the first slider 13 cooperate to drive the fixed plate 1 to move horizontally. The locking tongue simulation rod 6 is mounted on the mounting plate 14, which is connected to one end of the push-pull rod 3. The bottom surface of the mounting plate 14 is equipped with a second slider 15, and the top surface of the fixed plate 1 is equipped with a second slide rail 16. The second slide rail 16 and the second slider 15 cooperate to drive the mounting plate 14 to move horizontally.
[0037] Specifically, please see Figure 2 A limit ring 17 is provided at one end of the push-pull rod 3. By providing the limit ring 17 on the push-pull rod 3, the movement stroke of the push-pull rod 3 can be limited, preventing its other end from extending into the limit sleeve 7 and the fixed box 2 and being unable to reset. At the same time, when the locking tongue simulation rod 6 enters the fully locked state, the limit ring 17 does not contact the end of the limit sleeve 7 to avoid motion interference.
[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A car trunk lock testing device, characterized in that, include: A fixed plate that moves in a controlled manner along the horizontal direction; A fixed box is mounted on the fixed plate, and limit sleeves are provided on both sides of the fixed box. A push-pull rod passes through the two limiting sleeves and the fixed box, with both ends of the push-pull rod extending out of the fixed box, and the axis of the push-pull rod is parallel to the moving direction of the fixed plate; A detection spring is sleeved on the push-pull rod and one end of the detection spring is connected to the push-pull rod. The detection spring is located between the two limiting sleeves. A push-pull force sensor is installed at one end of the push-pull rod; A locking tongue analog rod is connected to one end of the push-pull rod; The push-pull rod is configured to move in a controlled manner along its axis toward the latch analog rod.
2. The automobile trunk lock detection device according to claim 1, characterized in that, Also includes: A full-lock push-in cylinder is mounted on the fixed plate. The movable end of the full-lock push-in cylinder is in contact with but not connected to the other end of the push-pull rod. When the lock tongue simulation rod is inserted into the half-lock position inside the trunk lock, it pushes the push-pull rod to continue moving forward, causing the lock tongue simulation rod to be inserted into the full-lock position inside the trunk lock.
3. The automobile trunk lock detection device according to claim 2, characterized in that, Also includes: The support platform can be raised and lowered vertically. A semi-lock push-in cylinder is mounted on the support platform. The movable end of the semi-lock push-in cylinder is connected to the bottom of the full-lock push-in cylinder. It is used to push the full-lock push-in cylinder and the fixed plate forward so that the lock tongue simulation rod is inserted into the semi-lock position in the trunk lock.
4. The automobile trunk lock detection device according to claim 3, characterized in that, A lifting cylinder is installed below the support platform, which is used to drive the fixed plate and the lock tongue simulation rod to move up and down.
5. The automobile trunk lock detection device according to claim 3, characterized in that, The support platform is provided with a first slide rail, and the bottom surface of the fixed plate is provided with a first slider. The first slide rail and the first slider cooperate to drive the fixed plate to move horizontally.
6. The automobile trunk lock detection device according to claim 1, characterized in that, The locking tongue simulation rod is mounted on the mounting plate, which is connected to one end of the push-pull rod. A second slider is provided on the bottom surface of the mounting plate, and a second slide rail is provided on the top surface of the fixed plate. The second slide rail cooperates with the second slider to drive the mounting plate to move horizontally.
7. The automobile trunk lock detection device according to claim 1, characterized in that, A limit ring is provided at one end of the push-pull rod.