Automatic leveling suspension test tool rack and leveling algorithm thereof
By adopting a combination of clamping structure and lifting structure in the suspension test tooling bench, combined with height sensors and leveling algorithms, the problem of maintaining leveling and fine-tuning of the car body during the test is solved, and the stability and accuracy of the car body is achieved.
Patent Information
- Application Number
- CN202411609532.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-03-07
AI Technical Summary
The prior art cannot meet the problem of carrying the weight of the white body, and making the body always maintain a level and cannot achieve fine adjustment up and down.
The automatic leveling suspension test tooling rig consisting of clamping structure and lifting structure is adopted. The clamping structure consists of four columns, body pressing beam and auxiliary column. The lifting structure is realized through the transmission shaft, coupling, planetary gear set and drive motor, combined with a height sensor and leveling algorithm to achieve horizontal maintenance and fine adjustment of the vehicle body.
The horizontal maintenance and fine adjustment of the body on the white body is achieved to ensure the stability and accuracy of the body during the test, and avoid the problem of difficulty in height adjustment in traditional methods.
Smart Images
Figure CN119574148A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of automobile bench testing, and in particular relates to an automatic leveling suspension test tooling bench and a leveling algorithm thereof. Background Art
[0002] Body and suspension bench testing is a very important part of the automobile R&D and production process. It aims to evaluate and improve the performance and reliability of the vehicle by simulating actual road driving conditions.
[0003] Body and suspension structure strength test: By simulating the stress conditions of the vehicle under various working conditions, the strength and rigidity of the body structure are tested to ensure its safety under extreme conditions such as collision.
[0004] Body and suspension durability test: simulates long-term, high-load use of the vehicle and performs fatigue tests on the vehicle body to ensure that it maintains stable performance during long-term use.
[0005] Bench testing is of great significance to automobile R&D and production. It can simulate various working conditions of the vehicle in actual use in a controlled environment, and discover and solve potential problems and deficiencies in advance. Through bench testing, the design and production process of the vehicle can be optimized, the performance and reliability of the vehicle can be improved, and the production and maintenance costs can be reduced. At the same time, bench testing can also provide strong guarantees for the safety and comfort of the vehicle, bringing a more pleasant driving experience to the driver and passengers.
[0006] However, in order to bear the weight of the body in white (approximately 500kg), traditional clamping fixtures are often thick and heavy. It is difficult to adjust the height of the body during the test and debugging process, especially during the fine-tuning process, it is difficult to achieve the level of the entire body in white.
[0007] In summary, the existing technology has the problem that it is unable to bear the weight of the body-in-white while keeping the body level at all times and cannot achieve fine-tuning up and down. Summary of the invention
[0008] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of the present invention to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.
[0009] Therefore, the purpose of the present invention is to provide an automatic leveling suspension test bench and its leveling algorithm, which can solve the problems that the prior art cannot satisfy the requirements of both bearing the weight of the body-in-white and keeping the body level at all times and cannot achieve fine-tuning up and down. The present invention provides an automatic leveling suspension test bench and its leveling algorithm, which includes a clamping structure and a lifting structure. The clamping structure includes four columns, which are placed in a rectangular shape, and the short sides are connected by the first fixed beam or the second fixed beam respectively, and the middle of the long sides are respectively provided with a body pressing down beam. The inner sides of the four columns are connected to the four auxiliary columns through connecting columns, and there are four lifting turbine screws above the four auxiliary columns. The four lifting turbine screws are connected to the body pressing down beam through the first height sensor, the second height sensor, the third height sensor, and the fourth height sensor respectively. The two sides of the body pressing down beam are connected to the body pressing up beam through screws; The lifting structure includes two auxiliary columns on the short sides with two transmission shafts in the middle. The two transmission shafts are connected to the four lifting turbine screws through the first coupling, the second coupling, the third coupling and the fourth coupling on both sides respectively. There is a planetary gear set in the middle of the two transmission shafts, and a driving motor is provided on one side of the planetary gear set.
[0010] Optionally, the opposite surfaces of the planetary gear sets are connected via a transmission shaft, and the driving motor is disposed on the side of any planetary gear set.
[0011] Optionally, a slide groove is arranged on the surface parallel to the column and the body pressing down beam, and two first limiting rollers adapted thereto are arranged on both sides of the slide groove, and the first limiting roller is fixedly connected to the cross section of one side of the body pressing down beam through a fixing plate, and similarly, the other side and both sides of another body pressing down beam are respectively provided with the same second limiting roller, third limiting roller and fourth limiting roller.
[0012] Optionally, a vehicle body support block is provided above both sides of the vehicle body pressing down cross beam, and the vehicle body support block is provided with two symmetrical lifting rings on the inner side direction of the vehicle body support block.
[0013] Optionally, a body limiting support block matching the body support block is provided at the bottom of the body pressing cross beam.
[0014] Optionally, the transmission ratio of the lifting structure driven by the driving motor is 1:24.
[0015] Optionally, a limiter is provided on the inner side surface of the top of the column.
[0016] Optionally, the first height sensor, the second height sensor, the third height sensor, and the fourth height sensor complete the control of the first coupling, the second coupling, the third coupling, and the fourth coupling through a leveling algorithm, and the leveling algorithm is: H = [h1, h2, h3, h4]; hi(i=1~4)-Min(H)<0.1mm(hi(i=1~4)); Where H is the system height matrix, h1, h2, h3, and h4 are the heights of the four auxiliary columns, hi is any one of the four auxiliary column heights, Min (H) is the minimum value in the system height matrix, and when the difference between the heights of all auxiliary columns and the minimum value is less than 0.1 mm, the device is level.
[0017] In summary, the present invention includes at least one of the following beneficial effects: The present invention adopts the combination of drive motor, auxiliary column, cross beam and screw, nut, worm screw, height sensor and leveling algorithm to achieve up and down fine adjustment, ensuring that the white body can remain level while carrying the white body, avoiding unnecessary errors in subsequent work.
[0018] The transmission ratio of the present invention is 1:24. In the absence of a locking mechanism, the worm can be self-locked to prevent the height of the body in white from changing during the test. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a three-dimensional structural schematic diagram of an automatic leveling suspension test fixture stand and its leveling algorithm of the present invention; Figure 2 It is a schematic diagram of the mechanical structure of an automatic leveling coupling of an automatic leveling suspension test fixture stand and its leveling algorithm of the present invention; Figure 3 It is a schematic diagram of the internal structure of a coupling of an automatic leveling suspension test fixture bench and its leveling algorithm of the present invention; Figure 4 It is a control logic diagram of the entire automatic leveling system of an automatic leveling suspension test tooling bench and its leveling algorithm of the present invention; Figure 5A schematic diagram of a four-unit linkage of a turbine screw rod of an automatic leveling suspension test fixture bench and a leveling algorithm thereof of the present invention; Figure 6 A schematic diagram of a planetary gear set of an automatic leveling suspension test fixture and a leveling algorithm thereof of the present invention; Figure 7 A schematic diagram of vertical lifting of an automatic leveling suspension test fixture stand and its leveling algorithm of the present invention; Figure 8 A schematic diagram of system weight measurement of an automatic leveling suspension test fixture stand and its leveling algorithm of the present invention; Fig. 9 A schematic diagram of the relationship between the screw rod length and the lifting force of an automatic leveling suspension test fixture and its leveling algorithm of the present invention; Figure numbers: 1. column; 2. drive motor; 3. vehicle body upper crossbeam; 4. vehicle body lower crossbeam; 5. first limit roller; 6. vehicle body support block; 7. transmission shaft; 8. lifting ring; 9. screw; 10. planetary gear set; 11. lifting turbine screw; 12. first height sensor; 13. second height sensor; 14. third height sensor; 15. fourth height sensor; 16. first coupling; 17. vehicle body limit support block; 18. first fixed crossbeam; 19. limiter; 20. second limit roller; 21. second fixed crossbeam; 22. third limit roller; 23. second coupling; 24. third coupling; 25. fourth coupling; 26. auxiliary column; 27. fourth limit roller. Implementation
[0021] The following is combined with Figure 1-9 The present invention is described in further detail.
[0022] Embodiment 1, refer to Figure 1-9 , in order to solve the problem that the prior art cannot satisfy the requirements of bearing the weight of the body-in-white and keeping the body level at all times and cannot achieve fine-tuning up and down, the present invention discloses an automatic leveling suspension test fixture rig and its leveling algorithm, an automatic leveling suspension test fixture rig and its leveling algorithm, including a clamping structure and a lifting structure, the clamping structure includes four columns 1, the columns 1 are arranged in a rectangular shape, the short sides are connected by the first fixed beam 18 or the second fixed beam 21, and the middle of the long sides are provided with a body pressing beam 4, the inner sides of the four columns 1 are connected to four auxiliary columns 26 through connecting columns, and four lifting turbine screws 11 are arranged above the four auxiliary columns 26, the four lifting turbine screws 11 are connected to the body pressing beam 4 through the first height sensor 12, the second height sensor 13, the third height sensor 14, and the fourth height sensor 15, respectively, and the two sides of the body pressing beam 4 are connected to the body pressing beam 3 through screws 9; The lifting structure includes two auxiliary columns 26 on the short sides with two transmission shafts 7 in the middle. The two transmission shafts 7 are connected to four lifting turbine screws 11 on both sides through the first coupling 16 and the second coupling 23, the third coupling 24 and the fourth coupling 25 respectively. There is a planetary gear set 10 in the middle of the two transmission shafts 7, and a driving motor 2 is provided on one side of the planetary gear set 10.
[0023] The four auxiliary columns 26 of the clamping structure are used to support the weight of the body-in-white. The body-in-white is clamped by the body-upper crossbeam 3 and the body-down crossbeam 4 to limit its left and right shaking during the test. The first height sensor 12, the second height sensor 13, the third height sensor 14, and the fourth height sensor 15 are leveled through an algorithm to maintain the stability of the body-in-white clamping.
[0024] The opposite surfaces of the planetary gear sets 10 are connected via a transmission shaft 7 , and a driving motor 2 is disposed on the side surface of any planetary gear set 10 .
[0025] The two planetary gear sets 10 are connected via the transmission shaft 7, which saves the resource waste of the two driving motors 2 while ensuring the synchronization of lifting and lowering.
[0026] A slide groove is arranged on the parallel surface of the column 1 and the body pressing down cross beam 4, and two first limit rollers 5 adapted thereto are arranged on both sides of the slide groove. The first limit roller 5 is fixedly connected to the cross section of one side of the body pressing down cross beam 4 through a fixing plate, and similarly, the other side and both sides of another body pressing down cross beam 4 are respectively provided with the same second limit roller 20, third limit roller 22 and fourth limit roller 27. The first limiting roller 5, the second limiting roller 20, the third limiting roller 22 and the fourth limiting roller 27 are adapted to the slideway to ensure that the lifting is vertical.
[0027] The body support blocks 6 are arranged above the two sides of the body pressing down cross beam 4, and the body support blocks 6 are provided with two symmetrical lifting rings 8 in the inner direction of the body support blocks 6. The body limit support blocks 17 adapted to the body support blocks 6 are arranged at the bottom of the body pressing up cross beam 3.
[0028] The body-in-white is laterally limited by the body-in-white support block 6 and the body-in-white limit support block 17, and the lifting ring 8 facilitates the lifting of the body-in-white during debugging.
[0029] The transmission ratio of the lifting structure driven by the driving motor 2 is 1:24.
[0030] The transmission ratio of 1:4 ensures that the worm is self-locking in the absence of a locking mechanism, preventing the body in white from changing height during the test.
[0031] A limiter 19 is provided on the inner side surface of the top of the column 1 .
[0032] The lifting height is limited by the limiter 19 to prevent the clamping structure from detaching from the lifting platform and causing safety hazards.
[0033] The first height sensor 12, the second height sensor 13, the third height sensor 14, and the fourth height sensor 15 control the first coupling 16, the second coupling 23, the third coupling 24, and the fourth coupling 25 through a leveling algorithm. The leveling algorithm is: H = [h1, h2, h3, h4]; hi(i=1~4)-Min(H)<0.1mm(hi(i=1~4)); Wherein H is the system height matrix, h1, h2, h3, and h4 are the heights of the four auxiliary columns 26, hi is any one of the four auxiliary column heights 26, and Min (H) is the minimum value in the system height matrix. When the difference between the heights of all auxiliary columns 26 and the minimum value is less than 0.1 mm, the device is level.
[0034] This is achieved by controlling the locking and releasing of four couplings through four height sensors. The system height matrix H = [h1, h2, h3, h4] The height of the entire system is determined by Min (H). When one of hi (i = 1~4) - Min (H) ≥ 0.1mm, the coupling of the auxiliary column 26 corresponding to hi (i = 1~4) will be disconnected. During the rotation of the drive motor 2, this auxiliary column 26 will not be lifted until the height of the other three auxiliary columns 26 reaches the height of this auxiliary column 26. The coupling will be locked to achieve synchronous lifting. This avoids the inconsistency of the heights of the four auxiliary columns 26, causing the entire system to get stuck during the lifting process and damage the tooling.
[0035] Specific implementation principle: Figure 8 The weight of the entire vehicle body & suspension system shown is F≤15KN, according to Fig. 9 The relationship between the screw length and the lifting force determines that the SWL2.5 model can meet the requirements of a lifting force not exceeding 15KN and a lifting height of 300mm. It is determined that the lift model SWL2.5 meets the requirements, that is, the system transmission ratio is 1:24, so that the device can achieve stability in the entire BIW lifting process through the leveling algorithm, millimeter-level control during the height adjustment process, and can also achieve self-locking of the worm through the transmission ratio in the absence of a locking mechanism to prevent the height of the BIW from changing during the test.
[0036] When using the present invention, firstly, the body-in-white is placed on the body-in-white support block 6 of the body-in-white cross beam 4 through the lifting ring 8, and the position of the body-in-white cross beam 3 on the screw 9 is adjusted to ensure that the body-in-white limit support block 17 plays a limiting role on the body-in-white, such as Figure 5 The whole system has four worm screws linked together in an H-shaped arrangement. Figure 6The driving motor 2 drives the transmission shaft 7 to rotate, and the planetary gear set 10 drives the rotating shafts 7 at both ends to rotate, thereby driving the auxiliary column 26 to rise. In order to achieve vertical lifting, the first limiting roller 5, the second limiting roller 20, the third limiting roller 22 and the fourth limiting roller 27 are clamped and slid with the slide groove on the side of the column 1 to maintain horizontal movement, such as Figure 7 shown.
[0037] The first height sensor 12, the second height sensor 13, the third height sensor 14, and the fourth height sensor 15 under the body pressing down the cross beam 4 are leveled by the algorithm. If the height difference between any of the four auxiliary columns 26 and the minimum height is greater than 0.01 mm, the coupling of this auxiliary column 26 is locked, and the remaining couplings are released until the heights of the other three auxiliary columns 26 reach the height of this auxiliary column 26. The couplings will be locked to achieve algorithm leveling, thus avoiding the inability of traditional flat suspension to perform up and down fine-tuning.
[0038] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made according to the structure, shape, principle, and method of the present invention should be included in the protection scope of the present invention.
Claims
1. An automatic leveling suspension test bench and its leveling algorithm, characterized by: The invention comprises a clamping structure and a lifting structure, wherein the clamping structure comprises four columns (1), wherein the columns (1) are arranged in a rectangular shape, wherein the short sides are connected by a first fixed cross beam (18) or a second fixed cross beam (21), and wherein a vehicle body pressing cross beam (4) is provided in the middle of each long side. The inner sides of the four columns (1) are connected to four auxiliary columns (26) by a connecting column, and four lifting turbine screws (11) are provided above the four auxiliary columns (26). The four lifting turbine screws (11) are connected to the vehicle body pressing cross beam (4) by a first height sensor (12), a second height sensor (13), a third height sensor (14), and a fourth height sensor (15), respectively. The two sides of the vehicle body pressing cross beam (4) are connected to the vehicle body pressing cross beam (3) by screws (9); The lifting structure comprises two auxiliary columns (26) on the short sides with two transmission shafts (7) in the middle. The two sides of the two transmission shafts (7) are respectively connected to the four lifting turbine screws (11) through a first coupling (16) and a second coupling (23), a third coupling (24) and a fourth coupling (25). There is a planetary gear set (10) in the middle of the two transmission shafts (7), and a driving motor (2) is provided on one side of the planetary gear set (10).
2. The automatic leveling suspension test bench and its leveling algorithm according to claim 1, characterized in that: The opposing surfaces of the planetary gear sets (10) are connected via a transmission shaft (7), and the drive motor (2) is arranged on the side surface of any planetary gear set (10).
3. The automatic leveling suspension test bench and its leveling algorithm according to claim 1, characterized in that: A slide groove is arranged on a surface parallel to the column (1) and the vehicle body pressing down cross beam (4), and two first limit rollers (5) matching with the slide groove are arranged on both sides of the slide groove. The first limit roller (5) is fixedly connected to the cross section of one side of the vehicle body pressing down cross beam (4) through a fixing plate, and similarly, the other side and both sides of another vehicle body pressing down cross beam (4) are respectively provided with the same second limit roller (20), third limit roller (22) and fourth limit roller (27).
4. The automatic leveling suspension test bench and its leveling algorithm according to claim 1, characterized in that: A vehicle body support block (6) is arranged above both sides of the vehicle body pressing down cross beam (4), and the vehicle body support block (6) is provided with two symmetrical lifting rings (8) in the inner direction of the vehicle body support block (6).
5. The automatic leveling suspension test bench and its leveling algorithm according to claim 4, characterized in that: A body limiting support block (17) matching the body support block (6) is arranged at the bottom of the body pressing cross beam (3).
6. The automatic leveling suspension test bench and its leveling algorithm according to claim 1, characterized in that: The transmission ratio of the lifting structure driven by the driving motor (2) is 1:
24.
7. The automatic leveling suspension test bench and its leveling algorithm according to claim 1, characterized in that: A limiter (19) is provided on the inner side surface of the top of the column (1).
8. The automatic leveling suspension test bench and its leveling algorithm according to claim 1, characterized in that: The first height sensor (12), the second height sensor (13), the third height sensor (14), and the fourth height sensor (15) complete the control of the first coupling (16), the second coupling (23), the third coupling (24), and the fourth coupling (25) through a leveling algorithm, and the leveling algorithm is: H = [h1, h2, h3, h4]; hi(i=1~4)-Min(H)<0.1mm(hi(i=1~4)); Wherein H is the system height matrix, h1, h2, h3, and h4 are the heights of the four auxiliary columns (26), hi is any one of the heights of the four auxiliary columns (26), and Min (H) is the minimum value in the system height matrix. When the difference between the height of the auxiliary column (26) and the minimum value is less than 0.1 mm, the device is horizontal.