Detection device for a car seat

Abstract

The application relates to the technical field of automobile seat detection equipment, and discloses a detection device for an automobile seat, which comprises a detection table, a base, a cushion, a backrest, and an angle hand wheel arranged at the hinge joint of the base and the backrest respectively, and the outer wall of the base is fixedly provided with a seat belt lock seat; the detection table is provided with a clamping and fixing assembly for positioning the base and a lock buckle butt joint test assembly for detecting the seat belt lock seat. The detection device for the automobile seat is provided with bidirectional elastic reset supporting rods in the hand wheel rotating test assembly and a transmission chain composed of universal joints in series, so that when the butt joint cylinder is butt jointed with the angle hand wheel and is biased, the transmission chain can be deformed and bent to allow the butt joint cylinder to deviate from the main shaft center. The flexible self-adapting structure effectively eliminates the radial parasitic load applied on the dynamic torque sensor, thereby greatly improving the accuracy and smoothness of the torque test.

Description

Technical Field

[0001] This invention relates to the field of automotive seat testing equipment technology, specifically to a testing device for automotive seats. Background Technology

[0002] Car seats are critical safety components of a vehicle. The backrest adjustment mechanism and seat belt lock directly affect driving comfort and driving safety. Before leaving the factory, car seats must pass two core tests: backrest adjustment torque and seat belt buckle insertion and unlocking performance. Testing equipment is required to test car seats.

[0003] Traditional automotive seat testing devices often use a rigid mechanism to directly connect with the part being tested. However, due to unavoidable spatial installation tolerances during the actual production and assembly of automotive seats, this rigid connection method presents several problems: when testing the torque of the seat angle adjustment handwheel, the main shaft of the testing mechanism and the handwheel shaft are prone to spatial misalignment, including concentricity and parallelism errors. This rigid connection leads to a large radial parasitic load under this misalignment, which not only causes mechanical jamming but also severely interferes with the measurement purity of the torque sensor, resulting in the inability to measure the true handwheel adjustment resistance torque. When testing seatbelt buckles, the connection between the seatbelt buckle and the seat in actual assembly is usually not absolutely rigid. The seatbelt buckle is typically connected to a flexible webbing or a movable steel wire shaft. Traditional testing equipment lacks an effective clamping and fixing mechanism for the seatbelt buckle during the downward insertion test. This causes the buckle to easily slip or shift laterally under force when the test plug is pressed down, preventing the test buckle from accurately and stably engaging with the buckle, severely impacting the success rate and accuracy of automated testing. Summary of the Invention

[0004] The present invention provides a detection device for automobile seats, which solves the problems mentioned in the background art.

[0005] The present invention provides the following technical solution: a testing device for automobile seats, including a testing platform, a base, a seat cushion, a backrest, and angle handwheels respectively disposed at the hinge joints of the base and the backrest; a seat belt lock seat is fixedly mounted on the outer wall of the base; the testing platform is provided with a clamping and fixing component for positioning the base, a buckle docking test component for testing the seat belt lock seat, and a handwheel rotation test component for testing the angle handwheel; The buckle docking test assembly includes a fixed base, on which a first clamping plate and a second clamping plate for clamping and aligning the seat belt lock seat are slidably mounted. A fixed rod is connected to the fixed base, and a support spring and a floating buckle provided with elastic recoil support by the support spring are movably sleeved on the outer wall of the fixed rod. The handwheel rotation test assembly includes a test cylinder and a docking cylinder. A rotation measuring motor is installed inside the test cylinder. The power output end of the rotation measuring motor is connected to the inner cavity of the docking cylinder through a universal joint assembly. A bidirectional elastic reset support rod is rotatably connected between the outer wall of the test cylinder and the outer wall of the docking cylinder.

[0006] As a preferred embodiment of the present invention, the clamping and fixing assembly includes a clamping drive cylinder, the output shaft of the clamping drive cylinder is fixedly fitted with a drive block, a lateral clamping block is movably sleeved on the top of the detection platform, a guide rod is fixedly fitted on the top of the detection platform, the two ends of the guide rod are respectively movably sleeved in the inner cavity of the lateral clamping block, and a return spring is movably sleeved on the outer wall of the guide rod, the two ends of the return spring abutting against the lateral clamping block and the guide rod respectively.

[0007] As a preferred embodiment of the present invention, the locking docking test assembly further includes a support plate, a displacement seat movably sleeved on the inner wall of the support plate, a displacement drive cylinder fixedly mounted on the outer wall of the support plate, the bottom of the displacement seat fixedly mounted to the fixed seat, a lifting guide groove formed on the outer wall of the displacement seat, a lifting adjustment seat movably sleeved on the inner wall of the lifting guide groove, a limit groove formed on the bottom of the lifting adjustment seat, a lifting electric push rod fixedly mounted on the bottom of the displacement seat, the power output shaft of the lifting electric push rod connected to the top of the lifting adjustment seat, the lifting adjustment seat penetrating downward through the inner cavity of the fixed seat and fixedly mounted to the fixed rod; a drive motor fixedly mounted on the top of the fixed seat, a drive gear fixedly mounted on the power output shaft of the drive motor, and driven tooth grooves meshing with the drive gears formed on the tops of both the first clamping plate and the second clamping plate; an unlocking plate movably sleeved on the inner wall of the bottom of the second clamping plate, an unlocking electric push rod fixedly mounted on the outer wall of the second clamping plate, and the output shaft of the unlocking electric push rod connected to the outer wall of the unlocking plate.

[0008] As a preferred embodiment of the present invention, the handwheel rotation test assembly further includes a guide rail, a drive screw rotatably connected to the top of the guide rail, a drive motor fixedly mounted on the top of the guide rail, a guide frame movably sleeved within the inner cavity of the guide rail, the top of the guide frame fixedly mounted to the detection cylinder, a flexible connecting cylinder installed at the end of the detection cylinder, the end of the flexible connecting cylinder away from the detection cylinder fixedly mounted to the docking cylinder, a drive disk rotatably connected to the inner cavity of the docking cylinder, and a drive rod fixedly mounted on the outer wall of the drive disk; a dynamic torque sensor is fixedly mounted on the power output shaft of the rotation measuring motor, and the universal joint assembly includes a second universal joint fixed to the output end of the dynamic torque sensor, a double-headed universal joint rotatably connected to the second universal joint, and a first universal joint connected between the double-headed universal joint and the drive disk.

[0009] As a preferred embodiment of the present invention, three bidirectional elastic reset support rods are provided and are arranged in a circular array around the central axis of the detection cylinder, together forming a spatial multi-degree-of-freedom flexible suspension component; both ends of the bidirectional elastic reset support rods are respectively hinged to the detection cylinder and the docking cylinder through universal ball joints.

[0010] As a preferred embodiment of the present invention, the first universal joint, the double-headed universal joint, and the second universal joint are connected in series to form a double universal joint transmission chain.

[0011] As a preferred embodiment of the present invention, the rotary measuring motor is a brushless hollow cup motor, the flexible connecting cylinder is made of flexible rubber, and its cylinder wall has a retractable corrugated structure.

[0012] As a preferred embodiment of the present invention, the first clamping plate and the second clamping plate are arranged in parallel, and the driving gears mesh with the driven tooth grooves on both sides respectively, configured to drive the first clamping plate and the second clamping plate to move synchronously in opposite directions.

[0013] In a preferred embodiment of the present invention, the floating latch is suspended and sleeved on the fixed rod by the support spring.

[0014] As a preferred embodiment of the present invention, the pushing direction of the unlocking electric push rod is consistent with the sliding direction of the unlocking plate, and the unlocking electric push rod is configured to drive the unlocking plate to slide outward to press the seat belt lock seat.

[0015] The present invention has the following beneficial effects: 1. This testing device for automotive seats incorporates a bidirectional elastic reset support rod and a transmission chain composed of universal joints within the handwheel rotation testing assembly. This allows the transmission chain to deform and bend when the docking cylinder engages with the angle handwheel and is offset, enabling the docking cylinder to deviate from the main axis. This flexible, adaptive structure effectively eliminates the radial parasitic load applied to the dynamic torque sensor, thereby significantly improving the accuracy and smoothness of torque testing.

[0016] 2. This testing device for automotive seats, by slidingly assembling the first and second clamping plates in the buckle docking test assembly, can effectively and actively clamp and align seat belt lock seats with installation tolerances. Simultaneously, the support spring movably sleeved on the outer wall of the fixed rod provides elastic relief support for the floating buckle, giving the test end passive relief capability in the Z-axis direction, effectively avoiding hard impacts, and achieving high-fidelity, non-destructive, automated insertion and removal testing of seat belt lock seats. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the back structure of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the detection stage and clamping components of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the clamping and fixing component of the present invention; Figure 5 This is a schematic diagram of the overall assembly structure of the seat of the present invention; Figure 6 This is a schematic diagram of the locking and docking test assembly structure of the present invention; Figure 7 This is a schematic diagram of the disassembled upper structure of the locking docking test assembly of the present invention; Figure 8 This is a schematic diagram of the disassembled structure of the locking and clamping mechanism of the present invention; Figure 9 This is a partially enlarged structural diagram of the clamping plate and unlocking mechanism of the present invention; Figure 10 This is a schematic diagram of the seat angle handwheel rotation test structure of the present invention; Figure 11 This is a schematic cross-sectional view of the handwheel rotation test assembly of the present invention; Figure 12 This is a schematic diagram of the internal transmission structure of the handwheel rotation test assembly of the present invention.

[0018] In the diagram: 1. Testing table; 2. Seat cushion; 3. Base; 4. Seat belt lock seat; 5. Backrest; 6. Angle handwheel; 7. Clamping and fixing assembly; 8. Locking docking test assembly; 9. Handwheel rotation test assembly; 701. Clamping drive cylinder; 702. Drive block; 703. Lateral clamping block; 704. Guide rod; 705. Return spring; 801. Support plate; 802. Displacement seat; 803. Displacement drive cylinder; 804. Fixed seat; 805. Lifting adjustment seat; 806. Lifting guide groove; 807. Lifting electric push rod; 808. Limit groove; 809. Fixed rod; 8010. Support spring; 8011. Floating latch; 8012. First clamping plate; 8013. Second clamping plate; 8014. Driven tooth groove; 8015. Drive gear; 8016. Drive motor; 8017. Unlocking electric push rod; 8018. Unlocking plate; 901. Guide rail; 902. Drive screw; 903. Drive motor; 904. Guide frame; 905. Detection cylinder; 906. Flexible connecting cylinder; 907. Docking cylinder; 908. Drive disc; 909. Drive rod; 9010. First universal joint; 9011. Double-headed universal joint; 9012. Rotary measuring motor; 9013. Dynamic torque sensor; 9014. Second universal joint; 9015. Bidirectional elastic reset support rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-12 A testing device for automobile seats includes a testing platform 1, a base 3, a seat cushion 2, a backrest 5, and angle handwheels 6 respectively disposed at the hinge points of the base 3 and the backrest 5. A seat belt lock seat 4 is fixedly mounted on the outer wall of the base 3. The testing platform 1 is provided with a clamping and fixing assembly 7 for positioning the base 3, a buckle docking test assembly 8 for testing the seat belt lock seat 4, and a handwheel rotation test assembly 9 for testing the angle handwheel 6. The locking docking test assembly 8 includes a fixed base 804, on which a first clamping plate 8012 and a second clamping plate 8013 for clamping the centering seat belt lock seat 4 are slidably mounted. A fixed rod 809 is connected to the fixed base 804. A support spring 8010 and a floating lock 8011 provided with elastic recoil support by the support spring 8010 are movably sleeved on the outer wall of the fixed rod 809. The handwheel rotation test assembly 9 includes a test cylinder 905 and a docking cylinder 907. The test cylinder 905 is equipped with a rotation measuring motor 9012. The power output end of the rotation measuring motor 9012 is connected to the inner cavity of the docking cylinder 907 through a universal joint assembly. A bidirectional elastic reset support rod 9015 is rotatably connected between the outer wall of the test cylinder 905 and the outer wall of the docking cylinder 907.

[0021] In a preferred embodiment: the clamping and fixing assembly 7 includes a clamping drive cylinder 701, the output shaft of the clamping drive cylinder 701 is fixedly fitted with a drive block 702, the top of the detection table 1 is movably sleeved with a lateral clamping block 703, the top of the detection table 1 is fixedly fitted with a guide rod 704, the two ends of the guide rod 704 are respectively movably sleeved in the inner cavity of the lateral clamping block 703, and the outer wall of the guide rod 704 is movably sleeved with a return spring 705, the two ends of the return spring 705 abut against the lateral clamping block 703 and the guide rod 704 respectively; In the above structure, by controlling the extension and retraction of the clamping drive cylinder 701, the drive block 702 can be pushed forward. Since the drive block 702 has inclined surfaces on both sides, the inner side of the lateral clamping block 703 is provided with a force-bearing inclined surface that cooperates with the inclined surface. When the clamping drive cylinder 701 pushes the drive block 702 forward, the forward thrust is converted into a lateral thrust through the inclined surface cooperation, thereby squeezing the lateral clamping blocks 703 on both sides to slide outward along the guide rod 704, thereby accurately positioning and clamping the car seat base 3 placed on the test table 1. After the test is completed, the clamping drive cylinder 701 retracts, and the lateral clamping blocks 703 automatically slide inward to reset under the elastic force of the return spring 705, releasing the base 3.

[0022] In a preferred embodiment: the locking and docking test assembly 8 further includes a support plate 801, a displacement seat 802 movably sleeved on the inner wall of the support plate 801, a displacement drive cylinder 803 fixedly mounted on the outer wall of the support plate 801, the bottom of the displacement seat 802 fixedly mounted on a fixed seat 804, a lifting guide groove 806 formed on the outer wall of the displacement seat 802, a lifting adjustment seat 805 movably sleeved on the inner wall of the lifting guide groove 806, a limit groove 808 formed at the bottom of the lifting adjustment seat 805, a lifting electric actuator 807 fixedly mounted at the bottom of the displacement seat 802, and the power output shaft of the lifting electric actuator 807 connected to the top of the lifting adjustment seat 805. The lifting adjustment seat 805 extends downward through the inner cavity of the fixed seat 804 and is fixedly assembled with the fixed rod 809; the top of the fixed seat 804 is fixedly assembled with a drive motor 8016, and the power output shaft of the drive motor 8016 is fixedly assembled with a drive gear 8015; the top of the first clamping plate 8012 and the second clamping plate 8013 are both provided with driven tooth grooves 8014 that mesh with the drive gear 8015; the inner wall of the bottom of the second clamping plate 8013 is movably sleeved with an unlocking plate 8018, and the outer wall of the second clamping plate 8013 is fixedly assembled with an unlocking electric push rod 8017, and the output shaft of the unlocking electric push rod 8017 is connected to the outer wall of the unlocking plate 8018. In the above structure, the displacement drive cylinder 803 can drive the displacement seat 802 and the entire test assembly to move as a whole along the support plate 801 toward or away from the seat, thereby adjusting the overall height. At the same time, the lifting electric push rod 807 drives the lifting adjustment seat 805 to slide up and down in the lifting guide groove 806, thereby driving the height adjustment of the bottom fixed rod 809 and floating buckle 8011. After the first clamping plate 8012 and the second clamping plate 8013 on both sides fix the seat belt lock seat 4, the floating buckle 8011 can move toward the seat belt lock seat 4 and float along the fixed rod 809, thereby achieving coarse positioning of the spatial position of the seat belt lock seat 4.

[0023] In a preferred embodiment: the handwheel rotation test assembly 9 further includes a guide rail 901, a drive screw 902 rotatably connected to the top of the guide rail 901, a drive motor 903 fixedly mounted on the top of the guide rail 901, a guide frame 904 movably sleeved within the inner cavity of the guide rail 901, the top of the guide frame 904 fixedly mounted to the test cylinder 905, a flexible connecting cylinder 906 installed at the end of the test cylinder 905, and the end of the flexible connecting cylinder 906 away from the test cylinder 905 being fixedly connected to the docking cylinder 907. The inner cavity of the docking cylinder 907 is rotatably connected to a drive disk 908, and a drive rod 909 is fixedly mounted on the outer wall of the drive disk 908; the power output shaft of the rotary measuring motor 9012 is fixedly mounted with a dynamic torque sensor 9013; the universal joint assembly includes a second universal joint 9014 fixed on the output end of the dynamic torque sensor 9013, a double-headed universal joint 9011 rotatably connected to the second universal joint 9014, and a first universal joint 9010 connected between the double-headed universal joint 9011 and the drive disk 908; In the above structure, the drive screw 902 is rotated by the drive motor 903, which causes the guide frame 904 to carry the detection cylinder 905 towards the backrest 5 of the seat until the drive disc 908 and drive rod 909 in the inner cavity of the docking cylinder 907 are inserted into the gap of the angle handwheel 6 to complete the mechanical docking. During the rotation test, the torque output by the rotation measuring motor 9012 is transmitted to the docking cylinder 907 through the universal joint assembly and drives the angle handwheel 6 to rotate. During this process, the dynamic torque sensor 9013 collects the resistance torque in real time to evaluate the smoothness of the handwheel adjustment.

[0024] In a preferred embodiment: three bidirectional elastic reset support rods 9015 are provided and are arranged in a circular array around the central axis of the detection cylinder 905, together forming a spatial multi-degree-of-freedom flexible suspension component; both ends of the bidirectional elastic reset support rods 9015 are respectively hinged to the detection cylinder 905 and the docking cylinder 907 through universal ball joints. In the above structure, the docking cylinder 907 obtains a multi-degree-of-freedom flexible floating capability in three-dimensional space through the cooperation of three bi-directional elastic reset support rods 9015 arranged in a circular array and universal ball joints. When the docking cylinder 907 approaches and docks with the angle handwheel 6, if there is a spatial deviation between the two axes, the docking cylinder 907 can overcome the elastic resistance of the bi-directional elastic reset support rods 9015 to adaptively deflect radially and tilt axially, thereby achieving stress-free automatic alignment, and automatically returning to the main axis position by elastic force after disengaging from contact.

[0025] In a preferred embodiment: the first universal joint 9010, the double-headed universal joint 9011 and the second universal joint 9014 are connected in series to form a double universal joint drive chain; In the above structure, the double universal joint drive chain formed by the first universal joint 9010, the double-headed universal joint 9011 and the second universal joint 9014 in series achieves ultimate decoupling of mechanical errors. When the docking cylinder 907 is spatially offset due to adapting to the handwheel position, the drive chain bends accordingly, thereby completely absorbing the radial misalignment between the power output shaft of the rotary measuring motor 9012 and the docking cylinder 907, completely eliminating the radial parasitic load transmitted to the dynamic torque sensor 9013, ensuring that the sensor collects only the pure rotational torque, and improving the test accuracy.

[0026] In a preferred embodiment: the rotary measuring motor 9012 is a brushless hollow cup motor, the flexible connecting cylinder 906 is made of flexible rubber, and its cylinder wall has a retractable corrugated structure. In the above structure, a brushless hollow cup motor is used as the rotary measuring motor 9012. By utilizing the cogging torque and extremely low rotor inertia characteristics brought by its coreless structure, a pure torque with extremely high linearity and smoothness is output, avoiding the interference of the motor's own jerking sensation on the torque measurement signal. At the same time, the flexible connecting cylinder 906, made of flexible rubber and with a corrugated structure, can undergo flexible adaptive deformation when the docking cylinder 907 deflects in three-dimensional space. This not only provides a wrapping and protection function for the internal transmission chain, but also avoids rigid mechanical interference with the deflection movement of the docking cylinder 907.

[0027] In a preferred embodiment: the first clamping plate 8012 and the second clamping plate 8013 are arranged in parallel, and the drive gear 8015 meshes with the driven tooth grooves 8014 on both sides respectively, configured to drive the first clamping plate 8012 and the second clamping plate 8013 to move synchronously in opposite directions. In the above structure, the drive motor 8016 drives the drive gear 8015 to rotate in both directions. By utilizing the transmission principle of the gear rack, the first clamping plate 8012 and the second clamping plate 8013, which have driven tooth grooves 8014 on both sides, move synchronously in opposite directions or away from each other. This allows them to actively find the geometric center of the seat belt lock seat 4 under test and actively center and clamp it, effectively overcoming the slight lateral offset of the tested part on the base 3 caused by installation tolerance.

[0028] In a preferred embodiment: the floating latch 8011 is suspended and sleeved on the fixed rod 809 by a support spring 8010; In the above structure, the floating buckle 8011 is suspended and supported at the initial middle position by the support spring 8010, which gives the test end a passive degree of freedom in the Z-axis direction. During the process of the floating buckle 8011 being inserted downward into the seat belt lock seat 4, if it encounters unexpected axial hard resistance, the support spring 8010 will be passively compressed to absorb the impact force, so that the floating buckle 8011 can float in an appropriate position along the fixed rod 809, so that the floating buckle 8011 can be better inserted into the seat belt lock seat 4.

[0029] In a preferred embodiment: the pushing direction of the unlocking electric push rod 8017 is consistent with the sliding direction of the unlocking plate 8018, and the unlocking electric push rod 8017 is configured to drive the unlocking plate 8018 to slide outward to press the seat belt lock seat 4; In the above structure, by integrating an unlocking electric push rod 8017 and an unlocking plate 8018 on the second clamping plate 8013, the unlocking electric push rod 8017 can push the unlocking plate 8018 to apply a precise linear push force to the release button of the lock seat when the seat belt lock seat 4 is clamped and fixed and the floating buckle 8011 is locked, thus simulating the pressing action of a human body when unfastening the seat belt with high fidelity.

[0030] Working principle: Place the car seat to be tested on the test bench 1; start the clamping drive cylinder 701 to extend its output shaft, push the drive block 702 to squeeze the side clamping blocks 703 on both sides to slide outward along the guide rod 704, thereby accurately positioning and clamping the seat base 3. First, the translational position of the buckle docking test assembly 8 is adjusted by the displacement drive cylinder 803, and the height of the fixed rod 809 and the floating buckle 8011 is adjusted by the lifting electric push rod 807 driving the lifting adjustment seat 805, so that the seat belt lock seat 4 enters between the first clamping plate 8012 and the second clamping plate 8013, completing the spatial coarse positioning of the seat belt lock seat 4; then the drive motor 8016 is started, and the first clamping plate 8012 and the second clamping plate 8013 are driven to move synchronously in opposite directions through the drive gear 8015, actively finding and centering the seat belt lock seat 4 to overcome the lateral installation tolerance of the tested part; Subsequently, by activating the lifting electric actuator 807, the lifting adjustment seat 805 is pushed downward along the inner wall of the lifting guide groove 806. At this time, the first clamping plate 8012 and the second clamping plate 8013 are in a clamping and fixing state on the seat belt lock seat 4. During the downward movement of the lifting adjustment seat 805, the floating buckle 8011 will continuously approach the seat belt lock seat 4. During this process, if there is axial hard resistance, the support spring 8010 will be passively compressed, allowing the floating buckle 8011 to float and yield along the fixed rod 809, so as to ensure that the floating buckle 8011 can be inserted into the seat belt lock seat 4. After the buckle insertion test is completed, the unlocking electric actuator 8017 drives the unlocking plate 8018 to press the lock seat release button, and the buckle pop-out test is completed by simulating human unlocking behavior with high fidelity. Then, the angle rotation of the angle handwheel 6 was tested. The drive motor 903 was started, and the guide frame 904 and the detection cylinder 905 were driven by the drive screw 902 to move towards the angle handwheel 6 at the backrest 5 until the drive disc 908 and drive rod 909 in the docking cylinder 907 were inserted into the gap of the handwheel to complete the docking. During this docking process, if there is a spatial deviation between the test spindle and the axis of the angle handwheel 6, the docking cylinder 907 can overcome the elastic force of the three bidirectional elastic reset support rods 9015 and automatically align itself without stress by adaptive axial tilting and radial deflection through the universal ball joint. At the same time, the flexible connecting cylinder 906 with a corrugated structure on the outside undergoes flexible deformation to avoid mechanical interference with the deflection. After docking, the rotary measuring motor 9012 starts and outputs smooth power with cogging torque. The axial and radial misalignment caused by the docking offset is completely absorbed by the bending deformation of the double universal joint drive chain consisting of the first universal joint 9010, the double-headed universal joint 9011, and the second universal joint 9014 connected in series; the radial parasitic load applied to the dynamic torque sensor 9013 is eliminated, ensuring that the sensor only collects pure rotational resistance torque in real time for accurate testing; After each test procedure is completed, control each cylinder, push rod and motor to reverse and retract; after the docking cylinder 907 is disengaged from the handwheel, it automatically returns to the central spindle position under the elastic force of the bidirectional elastic reset support rod 9015; the lateral clamping block 703 slides inward to reset under the action of the reset spring 705, release the base 3, and remove the tested seat from the top of the test table 1.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, 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 invention, the scope of which is defined by the appended technical solutions and their equivalents.

Claims

1. A testing device for automobile seats, comprising a testing platform (1), a base (3), a seat cushion (2), a backrest (5), and angle handwheels (6) respectively disposed at the hinge points of the base (3) and the backrest (5), wherein a seat belt lock seat (4) is fixedly mounted on the outer wall of the base (3); characterized in that, The testing platform (1) is provided with a clamping and fixing assembly (7) for positioning the base (3), a buckle docking test assembly (8) for testing the seat belt lock seat (4), and a handwheel rotation test assembly (9) for testing the angle handwheel (6). The latch docking test assembly (8) includes a fixed base (804), on which a first clamping plate (8012) and a second clamping plate (8013) for clamping the centering seat belt lock seat (4) are slidably mounted. A fixed rod (809) is connected to the fixed base (804). A support spring (8010) and a floating latch (8011) provided with elastic relief support by the support spring (8010) are movably sleeved on the outer wall of the fixed rod (809). The handwheel rotation test assembly (9) includes a test cylinder (905) and a docking cylinder (907). The test cylinder (905) is equipped with a rotation measuring motor (9012). The power output end of the rotation measuring motor (9012) is connected to the inner cavity of the docking cylinder (907) through a universal joint assembly. A bidirectional elastic reset support rod (9015) is rotatably connected between the outer wall of the test cylinder (905) and the outer wall of the docking cylinder (907). The locking docking test assembly (8) also includes a support plate (801), a displacement seat (802) is movably sleeved on the inner wall of the support plate (801), a displacement drive cylinder (803) is fixedly mounted on the outer wall of the support plate (801), the bottom of the displacement seat (802) is fixedly mounted to the fixed seat (804), a lifting guide groove (806) is opened on the outer wall of the displacement seat (802), a lifting adjustment seat (805) is movably sleeved on the inner wall of the lifting guide groove (806), a limit groove (808) is opened at the bottom of the lifting adjustment seat (805), a lifting electric push rod (807) is fixedly mounted at the bottom of the displacement seat (802), and the power output shaft of the lifting electric push rod (807) is connected to the top of the lifting adjustment seat (805). The lowering adjustment seat (805) penetrates downward through the inner cavity of the fixed seat (804) and is fixedly assembled with the fixed rod (809); the top of the fixed seat (804) is fixedly assembled with a drive motor (8016), and the power output shaft of the drive motor (8016) is fixedly assembled with a drive gear (8015); the tops of the first clamping plate (8012) and the second clamping plate (8013) are both provided with driven tooth grooves (8014) that mesh with the drive gear (8015); the inner wall of the bottom of the second clamping plate (8013) is movably sleeved with an unlocking plate (8018), and the outer wall of the second clamping plate (8013) is fixedly assembled with an unlocking electric push rod (8017), and the output shaft of the unlocking electric push rod (8017) is connected to the outer wall of the unlocking plate (8018); The handwheel rotation test assembly (9) also includes a guide rail (901), a drive screw (902) is rotatably connected to the top of the guide rail (901), a drive motor (903) is fixedly mounted on the top of the guide rail (901), a guide frame (904) is movably sleeved in the inner cavity of the guide rail (901), the top of the guide frame (904) is fixedly mounted to the test cylinder (905), a flexible connecting cylinder (906) is installed at the end of the test cylinder (905), and the end of the flexible connecting cylinder (906) away from the test cylinder (905) is fixed to the docking cylinder (907). The assembly includes a drive disk (908) rotatably connected to the inner cavity of the docking cylinder (907), and a drive rod (909) fixedly mounted on the outer wall of the drive disk (908); a dynamic torque sensor (9013) is fixedly mounted on the power output shaft of the rotary measuring motor (9012); the universal joint assembly includes a second universal joint (9014) fixed on the output end of the dynamic torque sensor (9013), a double-headed universal joint (9011) rotatably connected to the second universal joint (9014), and a first universal joint (9010) connected between the double-headed universal joint (9011) and the drive disk (908). The bidirectional elastic reset support rod (9015) is provided in three parts and is arranged in a circular array around the central axis of the detection cylinder (905), together forming a spatial multi-degree-of-freedom flexible suspension component; both ends of the bidirectional elastic reset support rod (9015) are respectively hinged to the detection cylinder (905) and the docking cylinder (907) through universal ball joints.

2. The detection device for automobile seats according to claim 1, characterized in that: The clamping and fixing assembly (7) includes a clamping drive cylinder (701), the output shaft of which is fixedly fitted with a drive block (702), a lateral clamping block (703) is movably sleeved on the top of the testing table (1), a guide rod (704) is fixedly fitted on the top of the testing table (1), both ends of the guide rod (704) are movably sleeved in the inner cavity of the lateral clamping block (703), and a return spring (705) is movably sleeved on the outer wall of the guide rod (704), with both ends of the return spring (705) abutting against the lateral clamping block (703) and the guide rod (704) respectively.

3. The detection device for automobile seats according to claim 1, characterized in that: The first universal joint (9010), the double-headed universal joint (9011), and the second universal joint (9014) are connected in series to form a double universal joint drive chain.

4. The detection device for automobile seats according to claim 1, characterized in that: The rotary measuring motor (9012) is a brushless hollow cup motor, and the flexible connecting cylinder (906) is made of flexible rubber, and its cylinder wall has a retractable corrugated structure.

5. The detection device for automobile seats according to claim 1, characterized in that: The first clamping plate (8012) and the second clamping plate (8013) are arranged in parallel. The drive gear (8015) meshes with the driven tooth grooves (8014) on both sides respectively, and is configured to drive the first clamping plate (8012) and the second clamping plate (8013) to move synchronously in opposite directions.

6. The detection device for automobile seats according to claim 1, characterized in that: The floating latch (8011) is suspended on the fixed rod (809) by the support spring (8010).

7. The detection device for automobile seats according to claim 1, characterized in that: The pushing direction of the unlocking electric push rod (8017) is consistent with the sliding direction of the unlocking plate (8018), and the unlocking electric push rod (8017) is configured to drive the unlocking plate (8018) to slide outward to press the seat belt lock seat (4).

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