Torque testing mechanism

Abstract

The utility model provides a torque testing mechanism, which is used for testing the driving torque of a height adjusting mechanism of a vehicle seat and comprises a base used for bearing the height adjusting mechanism and a testing assembly. The testing assembly comprises a driving unit and a driving gear which is in transmission connection with a driving shaft of the driving unit through a torque sensor; the driving gear is rotationally connected to a fixing plate in the height adjusting mechanism and connected with a toothed plate structure in the height adjusting mechanism in a meshed mode. According to the torque testing mechanism provided by the utility model, through the arrangement of the driving unit, the torque sensor and the driving gear, when the driving gear rotates, the driving gear can drive the height adjusting mechanism to lift through the toothed plate structure. Meanwhile, the torque sensor can measure the torque output by the driving unit to the height adjusting mechanism in real time, and therefore the driving torque of the height adjusting mechanism of the vehicle seat can be measured conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle testing, in particular to a torque testing mechanism. Background Art

[0002] With the increasing development of vehicle interior testing technology, major vehicle manufacturers and parts manufacturers are continuously tightening their internal testing standards to meet the personalized needs of the market. Vehicle seats are an important part of the vehicle. They not only provide a comfortable riding experience for drivers and passengers, but also perform safety functions, such as protecting passengers in the event of a collision.

[0003] Vehicle seats typically feature a height adjustment mechanism at the bottom, used to adjust seat height. Whether manual or power-operated, an actuator delivers torque to the height adjustment mechanism to raise or lower it. Therefore, it's necessary to measure the height adjustment mechanism's driving torque during startup and operation to determine the appropriate actuator for optimal seat adjustment flexibility and speed.

[0004] However, traditional torque testing methods mostly rely on manual operation. Operators need to hold a push-pull force gauge or sensor to perform torque testing. In addition, torque testing can only be performed in one direction and once. This makes it difficult to effectively simulate the actual working conditions when the seat is raised or lowered, and it is not convenient to measure the driving torque of the height adjustment mechanism. Utility Model Content

[0005] In view of this, the present invention aims to provide a torque testing mechanism to facilitate measuring the driving torque of a height adjustment mechanism of a vehicle seat.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] A torque testing mechanism for testing the driving torque of a height adjustment mechanism of a vehicle seat, the torque testing mechanism comprising a base for supporting the height adjustment mechanism and a testing assembly;

[0008] The test assembly includes a drive unit, and a drive gear drivingly connected to a drive shaft of the drive unit through a torque sensor;

[0009] The driving gear is rotatably connected to the fixed plate in the height adjustment mechanism and is meshed with the toothed plate structure in the height adjustment mechanism.

[0010] Furthermore, the driving gear and the torque sensor are connected via a parallel eccentric coupling.

[0011] Furthermore, the parallel eccentric coupling is connected to the driving gear through a first coupling, and the parallel eccentric coupling is connected to the torque sensor through a second coupling.

[0012] Furthermore, the driving unit includes a servo motor and a reducer connected to the servo motor; the output shaft of the reducer is connected to the torque sensor through a third coupling.

[0013] Furthermore, a mounting bracket is provided on the top of the base, and the height adjustment mechanism is fixedly mounted on the mounting bracket.

[0014] Furthermore, the driving gear is rotatably connected to a retaining frame located on one side of the fixing plate, and the retaining frame constitutes a limiting constraint on the driving gear in the axial direction of the driving gear.

[0015] Furthermore, the torque testing mechanism also includes a lifting assembly; the lifting assembly includes a lifting drive unit and a lifting platform driven to move up and down by the lifting drive unit; the testing assembly is arranged on the lifting platform.

[0016] Furthermore, the lifting drive unit includes a frame, a screw rotatably arranged in the frame, and a screw nut threaded on the screw; the lifting platform is slidably arranged on one side of the frame and is connected to the screw nut, and when the screw is driven to rotate, the lifting platform is driven to rise and fall through the screw nut.

[0017] Furthermore, a slide rail is provided on one side of the frame, and a slide groove matching the slide rail is formed on the lifting platform, and the lifting platform slides along the slide rail through the slide groove.

[0018] Furthermore, a handwheel for driving the lead screw to rotate is provided on the top of the frame.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The torque testing mechanism described in this utility model comprises a drive unit, a torque sensor, and a drive gear. When the drive gear rotates, it drives the height adjustment mechanism up and down via a toothed plate structure. Furthermore, during operation, the torque sensor measures the torque output by the drive unit to the height adjustment mechanism in real time, thereby facilitating measurement of the driving torque of the vehicle seat's height adjustment mechanism.

[0021] In addition, the drive gear and torque sensor are connected via a parallel eccentric coupling. The parallel eccentric coupling tolerates large radial misalignment, enabling the drive unit to continuously output torque to the drive gear. The parallel eccentric coupling is connected to the drive gear and torque sensor via a first coupling and a second coupling, respectively. This allows for a certain amount of axial, radial, and angular displacement between the drive gear, torque sensor, and parallel eccentric coupling, ensuring a secure connection between them and ensuring transmission stability.

[0022] In addition, the drive unit includes a servo motor and a reducer connected to the servo motor. The high rotation accuracy of the servo motor is utilized to improve the accuracy of the torque test. At the same time, the setting of the reducer plays a role in buffering and transmitting torque, which helps to reduce vibration and impact during the test and can increase the torque output range of the drive unit. A mounting bracket is provided on the top of the base to facilitate the installation and fixation of the height adjustment mechanism. The drive gear is rotatably connected to the retaining bracket located on one side of the fixed plate, so that the retaining bracket constrains the drive gear in the lateral direction to prevent the drive gear from slipping and separating from the gear plate structure.

[0023] Furthermore, through the arrangement of the lifting drive unit and the lifting platform, the lifting drive unit can drive the lifting platform to move up and down to change the height of the test assembly, so as to meet the testing requirements of height adjustment mechanisms of different specifications, thereby improving the versatility of the torque testing mechanism. The lifting platform is driven up and down by the lead screw nut. It has a compact structure and high transmission efficiency, and the lead screw has a strong load-bearing capacity. A slide rail is provided on the side of the frame facing the lifting platform, and a slide groove matching the slide rail is formed on the lifting platform to improve the stability of the test assembly during the lifting process. A handwheel is provided on the top of the frame, and operating the handwheel can drive the lead screw to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the torque testing mechanism according to an embodiment of the present utility model;

[0026] Figure 2 This is a schematic structural diagram of the height adjustment mechanism according to an embodiment of the present utility model;

[0027] Figure 3 This is a schematic structural diagram of the test assembly and the lifting assembly according to an embodiment of the present utility model;

[0028] Figure 4Description of reference numerals for a top view of the connection between the height adjustment mechanism and the driving gear according to an embodiment of the present invention:

[0029] 1. Height adjustment mechanism;

[0030] 101. Slide rail assembly; 102. Active connecting rod; 1021. Tooth plate structure; 103. Driven connecting rod; 104. Fixed plate; 1041. Cage; 105. Rear lift rod;

[0031] 2. Base;

[0032] 201, mounting bracket;

[0033] 3. Drive unit;

[0034] 301, servo motor; 302, reducer;

[0035] 4. Torque sensor;

[0036] 5. Drive gear;

[0037] 6. Parallel eccentric coupling;

[0038] 601, first coupling; 602, second coupling;

[0039] 7. Third coupling;

[0040] 8. Lifting drive unit;

[0041] 801, frame; 802, lead screw; 803, slide rail; 804, hand wheel;

[0042] 9. Lifting platform;

[0043] 901. Screw nut. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0045] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0046] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0047] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0048] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0049] This embodiment relates to a torque testing mechanism for testing the driving torque of a height adjustment mechanism 1 of a vehicle seat. Figure 1 、 Figure 3 As shown, the torque testing mechanism of this embodiment includes a base 2 for supporting a height adjustment mechanism 1 and a testing assembly.

[0050] The test assembly includes a drive unit 3 and a drive gear 5 connected to the drive shaft of the drive unit 3 via a torque sensor 4. The drive gear 5 is rotatably connected to the fixed plate 104 in the height adjustment mechanism 1 and meshes with the toothed plate structure 1021 in the height adjustment mechanism 1.

[0051] As described above, through the arrangement of the drive unit 3, the torque sensor 4, and the drive gear 5, when the drive gear 5 rotates, the drive gear 5 can drive the height adjustment mechanism 1 to rise and fall via the toothed plate structure 1021. Simultaneously, during the operation of the height adjustment mechanism 1, the torque sensor 4 can measure in real time the torque output by the drive unit 3 to the height adjustment mechanism 1, thereby facilitating measurement of the driving torque of the height adjustment mechanism 1 of the vehicle seat.

[0052] Based on the above overall introduction, specifically, Figure 2As shown, the height adjustment mechanism 1 of this embodiment also includes a slide rail assembly 101, an active connecting rod 102, and a driven connecting rod 103. The bottom ends of the active connecting rod 102 and the driven connecting rod 103 are hinged to the slide rail assembly 101, and the tops of the active connecting rod 102 and the driven connecting rod 103 are hinged to the fixed plate 104, so that the slide rail assembly 101, the fixed plate 104, the active connecting rod 102, and the driven connecting rod 103 form a four-bar structure. The toothed plate structure 1021 of this embodiment is arranged on the top of the active connecting rod 102. When the driving gear 5 rotates, the driving gear 5 can drive the active connecting rod 102 to rotate through the toothed plate structure 1021, driving the fixed plate 104 to rise and fall, thereby achieving the lifting effect of the height adjustment mechanism 1. At the same time, the height adjustment mechanism 1 is fixed to the base 2 through the slide rail assembly 101.

[0053] Since the driving gear 5 of this embodiment is rotatably arranged on the fixed plate 104, and the active connecting rod 102 and the driven connecting rod 103 form a four-bar linkage with the fixed plate 104 and the slide rail assembly 101, when the driving gear 5 drives the active connecting rod 102 to rotate and causes the fixed plate 104 to rise and fall, the driving gear 5 moves along the circular arc trajectory with the fixed plate 104.

[0054] To ensure that the drive gear 5 remains connected to the drive unit 3 during movement, the drive gear 5 and torque sensor 4 of this embodiment are connected via a parallel eccentric coupling 6. This parallel eccentric coupling 6 allows for significant radial misalignment. This arrangement allows for radial displacement between the rotation axis of the drive gear 5 and the torque sensor 4, i.e., the axis of the output shaft of the drive unit 3. This ensures that the drive unit 3 can continuously output torque to the drive gear 5 as the drive gear 5 moves along an arc, thus ensuring the proper functioning of the torque testing mechanism of this embodiment.

[0055] Specifically, the parallel eccentric coupling 6 of this embodiment is connected to the drive gear 5 via a first coupling 601, and the parallel eccentric coupling 6 is connected to the torque sensor 4 via a second coupling 602. As the drive gear 5 moves with the fixed plate 104, the first coupling 601 and the second coupling 602 are provided to allow for a certain amount of axial, radial, and angular displacement between the drive gear 5, the torque sensor 4, and the parallel eccentric coupling 6, thereby ensuring the connection between the drive gear 5, the torque sensor 4, and the parallel eccentric coupling 6 and ensuring transmission stability. Furthermore, the provision of the first coupling 601 and the second coupling 602 helps reduce vibration and noise caused by displacement, improves the operational smoothness of the torque testing mechanism of this embodiment, and ensures the accuracy of the torque test.

[0056] In specific implementation, the first coupling 601 of this embodiment may preferably adopt a clamping type double diaphragm coupling, which can absorb deflection and eccentricity, thereby ensuring the transmission effect between the driving gear 5 and the parallel eccentric coupling 6 when the driving gear 5 moves along the arc trajectory.

[0057] As a specific implementation form, the drive unit 3 of this embodiment includes a servo motor 301 and a reducer 302 connected to the servo motor 301. The output shaft of the reducer 302 is connected to the torque sensor 4 through a third coupling 7. By utilizing the high rotation accuracy of the servo motor 301, the speed and torque output of the drive gear 5 can be accurately controlled to improve the accuracy of the torque test. At the same time, the setting of the reducer 302 plays a role in buffering and transmitting torque, which helps to reduce vibration and impact during the test process, and can increase the torque output range of the drive unit 3 to adapt to height adjustment mechanisms 1 of different specifications, thereby improving the versatility of the torque testing mechanism of this embodiment.

[0058] In specific implementation, the second coupling 602 and the third coupling 7 of this embodiment may preferably adopt stepped diaphragm couplings because they need to transmit larger torque. They have higher transmission efficiency to ensure the transmission effect between the drive unit 3 and the parallel eccentric coupling 6.

[0059] In addition, a mounting bracket 201 is provided on the top of the base 2 of this embodiment, and the height adjustment mechanism 1 is fixedly mounted on the mounting bracket 201. Specifically, four mounting brackets 201 are provided on the base 2 of this embodiment, and the mounting brackets 201 are arranged in pairs on the left and right sides of the base 2. It can be understood that the height adjustment mechanism 1 of the vehicle seat is generally a pair arranged on both sides of the vehicle seat, and the pair of height adjustment mechanisms 1 are connected by a rear lifting rod 105.

[0060] In this embodiment, only the slide rail assembly 101 of the height adjustment mechanism 1 on the left side of the vehicle seat is mounted on the two mounting brackets 201 on one side of the base 2. Of course, a pair of height adjustment mechanisms 1 on either side of the vehicle seat can be simultaneously secured to the base 2 using the four mounting brackets 201 on the base 2. The provision of the mounting brackets 201 facilitates securing the slide rail assembly 101 to the base 2, thereby facilitating the installation and fixation of the height adjustment mechanism 1 and facilitating torque testing of the height adjustment mechanism 1.

[0061] When the driving gear 5 is rotated and arranged on the fixed plate 104, the driving gear 5 is easy to be dislocated along its axis direction, resulting in the driving gear 5 being easy to be separated from the gear plate structure 1021 during the test process. Figure 2 、 Figure 4As shown, the drive gear 5 of this embodiment is rotatably connected to a retainer 1041 located on one side of the fixed plate 104, and the retainer 1041 constitutes a position limiting constraint on the drive gear 5 in the axial direction of the drive gear 5. It can be understood that through the provision of the retainer 1041, the drive gear 5 is sandwiched between the retainer 1041 and the fixed plate 104, so that the retainer can abut the end of the drive gear 5 to prevent the drive gear 5 from shifting along its axial direction and separating from the tooth plate structure 1021. This constitutes a position limiting constraint on the drive gear 5 in the axial direction of the drive gear 5, ensuring stability during testing.

[0062] In order to adapt to different specifications and height adjustment mechanisms 1, the torque testing mechanism of this embodiment also includes a lifting component. Figure 3 As shown, the lifting assembly includes a lifting drive unit 8 and a lifting platform 9 driven to rise and fall by the lifting drive unit 8, and the test assembly is placed on the lifting platform 9. Through the arrangement of the lifting drive unit 8 and the lifting platform 9, the lifting drive unit 8 can drive the lifting platform 9 to rise and fall to change the height of the test assembly, so that the torque testing mechanism of this embodiment can meet the testing requirements of height adjustment mechanisms 1 of different specifications, thereby further improving the versatility of this embodiment.

[0063] Specifically, the lifting drive unit 8 of this embodiment includes a frame 801, a leadscrew 802 rotatably mounted within the frame 801, and a leadscrew nut 901 threaded onto the leadscrew 802. The lifting platform 9 is slidably mounted on one side of the frame 801 and connected to the leadscrew nut 901. When the leadscrew 802 is driven to rotate, the leadscrew nut 901 drives the lifting platform 9 up and down. This compact structure and high transmission efficiency, combined with the strong load-bearing capacity of the leadscrew 802, effectively drives the test assembly up and down.

[0064] In addition, a slide rail 803 is provided on one side of the frame 801 of this embodiment, and a slide groove is formed on the lifting platform 9 to match the slide rail 803. The lifting platform 9 slides along the slide rail 803 through the slide groove. By providing the slide groove and slide rail 803, the slide groove on the lifting platform 9 can slide on the slide rail 803. Therefore, during the rotation of the lead screw 802, the lifting platform 9 is prevented from colliding with the frame 801 due to friction between the lead screw nut 901 and the slide rail 803, thereby improving the stability of the test assembly during the lifting process. In a specific implementation, two slide rails 803 are provided on the frame 801 of this embodiment, and the two slide rails 803 are respectively provided on both sides of the lead screw 802. The lifting platform 9 is provided with two slide grooves corresponding to each slide rail 803.

[0065] Finally, to drive the screw 802 to rotate, a handwheel 804 is provided on the top of the frame 801. This embodiment has a simple and reliable structure, and the lifting assembly is used relatively infrequently. Using handwheel 804 to drive the screw 802 eliminates the need for additional components such as a drive motor, significantly reducing the manufacturing cost of this embodiment.

[0066] In summary, the torque testing mechanism of this embodiment, through the arrangement of the drive unit 3, the torque sensor 4, and the drive gear 5, can, when the drive gear 5 rotates, drive the height adjustment mechanism 1 to rise and fall via the toothed plate structure 1021. Furthermore, during the operation of the height adjustment mechanism 1, the torque sensor 4 can measure the torque output by the drive unit 3 to the height adjustment mechanism 1 in real time, thereby facilitating the measurement of the driving torque of the vehicle seat height adjustment mechanism 1, thus providing excellent practicality.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A torque testing mechanism for testing the driving torque of a height adjustment mechanism (1) of a vehicle seat, characterized in that: The torque testing mechanism comprises a base (2) for supporting the height adjustment mechanism (1), and a testing assembly; The test assembly comprises a drive unit (3), and a drive gear (5) connected to a drive shaft of the drive unit (3) via a torque sensor (4); The driving gear (5) is rotatably connected to the fixed plate (104) in the height adjustment mechanism (1), and is meshed with the toothed plate structure (1021) in the height adjustment mechanism (1).

2. The torque testing mechanism according to claim 1, characterized in that: The driving gear (5) and the torque sensor (4) are connected in transmission via a parallel eccentric coupling (6).

3. The torque testing mechanism according to claim 2, characterized in that: The parallel eccentric coupling (6) is connected to the driving gear (5) via a first coupling (601), and the parallel eccentric coupling (6) is connected to the torque sensor (4) via a second coupling (602).

4. The torque testing mechanism according to claim 1, characterized in that: The driving unit (3) includes a servo motor (301) and a reducer (302) connected to the servo motor (301); The output shaft of the reducer (302) is connected to the torque sensor (4) via a third coupling (7).

5. The torque testing mechanism according to claim 1, characterized in that: A mounting bracket (201) is provided on the top of the base (2), and the height adjustment mechanism (1) is fixedly mounted on the mounting bracket (201).

6. The torque testing mechanism according to claim 1, characterized in that: The driving gear (5) is rotatably connected to a retaining frame (1041) located on one side of the fixing plate (104), and the retaining frame (1041) constitutes a limiting constraint on the driving gear (5) in the axial direction of the driving gear (5).

7. The torque testing mechanism according to any one of claims 1 to 6, characterized in that: The torque testing mechanism also includes a lifting assembly; The lifting assembly includes a lifting drive unit (8) and a lifting platform (9) driven to move up and down by the lifting drive unit (8); The test assembly is arranged on the lifting platform (9).

8. The torque testing mechanism according to claim 7, characterized in that: The lifting drive unit (8) includes a frame (801), a lead screw (802) rotatably arranged in the frame (801), and a lead screw nut (901) screwed onto the lead screw (802); The lifting platform (9) is slidably arranged on one side of the frame (801) and is connected to the lead screw nut (901). When the lead screw (802) is driven to rotate, the lifting platform (9) is driven to move up and down through the lead screw nut (901).

9. The torque testing mechanism according to claim 8, characterized in that: A slide rail (803) is provided on one side of the frame (801), and a slide groove matching the slide rail (803) is formed on the lifting platform (9), and the lifting platform (9) slides along the slide rail (803) through the slide groove.

10. The torque testing mechanism according to claim 8, characterized in that: A hand wheel (804) for driving the lead screw (802) to rotate is provided on the top of the frame (801).

Images