A balanced suspension performance test device

Abstract

The present application relates to the technical field of vehicle suspension testing, in particular to a balanced suspension performance test device, comprising a clamping assembly, a driving unit, a locking assembly and an adjusting unit. In the present application, by setting the vertical force point and the ground contact force point, the test requirements of the vertical direction suspension carrying capacity are met, and the simulation of turning, acceleration or braking is carried out on the ground contact force point. The force transmission path is more in line with the actual situation, and the angle of the comprehensive force is changed through the adjusting unit to simulate different working conditions, improve the practicability of the device, increase the diversification of the simulation test conditions, and make the test process more in line with the application. The reliability of the test results is improved, and the convenience of the technical scheme implementation is also improved compared with the existing test process.

Description

Technical Field

[0001] This invention relates to the field of vehicle suspension testing technology, specifically to a balanced suspension performance testing device. Background Technology

[0002] Balanced suspension is widely used in trains, buses, special vehicles and multi-axle off-road vehicles. As a core load-bearing and force-transmitting device, its core function is to make the vertical load of each axle more equal, while taking into account load-bearing capacity, ride comfort and handling stability. Therefore, the suspension needs to undergo various performance tests before leaving the factory.

[0003] Modern suspension testing typically includes static stiffness testing, dynamic fatigue testing, and natural frequency testing. In simple terms, the suspension is fixed with the two sides of the center of the balance wheel hub as the force application points. An external high-precision, high-dynamic-response closed-loop control system is used to apply force to the force application points to simulate the real use of the suspension and collect various data to test the suspension performance.

[0004] The following problems exist in the existing testing process: In the testing of lateral and longitudinal compliance of the suspension, lateral and longitudinal forces need to be applied to the wheel hub to simulate acceleration, braking and cornering. Currently, the force application points are still the front and rear sides of the wheel hub. However, in the normal use of the suspension on a vehicle, the force application point is the contact area of ​​the tire (indirectly equal to the wheel hub). Therefore, the force transmission path is greatly deviated in the current testing process, making it difficult to reflect real usage data and ultimately making it difficult to guarantee the authenticity and reliability of the test results. Summary of the Invention

[0005] Therefore, it is necessary to provide a balanced suspension performance testing device to solve the problems of the prior art.

[0006] This application provides a balance suspension performance testing device, which is used in conjunction with a main frame for fixing the balance suspension. It includes a sub-frame, on which two testing mechanisms are provided. Each testing mechanism includes a clamping assembly for connecting to the balance wheel hub. The clamping assembly includes an upper housing and a lower housing. When the upper housing and the lower housing are closed and locked, they clamp the balance wheel hub.

[0007] The test mechanism also includes a drive unit. The drive unit, which applies reciprocating force to the balance wheel hub, is set on the sub-frame. The drive unit includes two hydraulic rods. The telescopic ends of the hydraulic cylinders are equipped with sliding columns that extend to the left and right along the axis. Different situations are simulated by moving the sliding columns to the front, rear, and lower sides of the balance wheel hub. The lower housing is equipped with a locking component for locking the position of the sliding columns.

[0008] The subframe is equipped with an adjustment unit for adjusting the angle of the two hydraulic rods. The adjustment unit includes two slides distributed front and rear. The hydraulic rods are mounted on the slides. The angle of the hydraulic rods is adjusted by adjusting the position of the slides and locking the slides through the adjustment unit.

[0009] When the two hydraulic cylinders are adjusted to a vertical orientation and the slide is located on the front and rear sides of the balance wheel hub, a vertical reciprocating performance test is conducted. When the slide moves to the bottom of the balance wheel hub, the situation of the tire touching the ground is simulated, and the longitudinal force is simulated by adjusting the tilt angle of the hydraulic cylinders.

[0010] According to an advantageous embodiment, the upper housing consists of a mounting block, a closing frame, and a mounting block from front to back, and the lower housing consists of a mounting base, a closing frame, and a mounting base from front to back.

[0011] The closure frame is a semi-circular frame with a U-shaped cross section, and the mounting base and the corresponding mounting block are locked together by bolts.

[0012] According to an advantageous embodiment, the slide is slidably mounted on the sub-frame, and a threaded rod corresponding to the slide is rotatably mounted on the sub-frame. The threaded rod passes through the corresponding slide and is threadedly engaged with the slide.

[0013] A mounting column is rotatably mounted on the slide block, and the lower end of the hydraulic rod is fixedly mounted on the corresponding mounting column.

[0014] According to an advantageous embodiment, a scale corresponding to the slide is fixedly provided on the upper end face of the sub-frame, and a pointer is fixedly provided on the slide. The pointer and the scale cooperate to display the tilt angle of the hydraulic rod.

[0015] According to an advantageous embodiment, the adjustment unit further includes a slide rod, and slide rods are fixedly provided on both the left and right sides of the slide seat. The slide rods pass through the sub-frame, and a follower seat corresponding to the slide rod is slidably provided on the sub-frame. A locking cylinder is slidably provided on the follower seat, and the locking cylinder is slidably sleeved on the corresponding slide rod. A sealing cavity is provided inside the locking cylinder, and a movable plug is slidably provided inside the sealing cavity. The movable plug is fixedly provided at the tail of the slide rod.

[0016] According to an advantageous embodiment, the lower end of the closing frame of the lower housing is provided with an extension, and a through groove is provided through the mounting base, extending to the lower side of the mounting base. The extension is also provided with two through grooves on the left and right sides, and the through grooves on the extension extend to the lower side of the extension.

[0017] Two symmetrical locking sleeves are rotatably installed inside the through groove. The part of the locking sleeve located inside the through groove has a locking groove. The longitudinal section of the locking groove is composed of a circular groove and a rectangular groove. The rectangular groove extends through to the outer arc surface of the locking sleeve. The diameter of the sliding column is smaller than the left-right distance between two adjacent locking grooves.

[0018] According to an advantageous embodiment, a U-shaped frame is fitted together on two adjacent locking sleeves on the front and rear sides of the balance wheel hub. A rubber block is fixedly installed on the end face of the transverse section of the U-shaped frame facing the locking sleeve side, and two slots are provided on the mounting base.

[0019] According to an advantageous embodiment, the left and right ends of the remaining two adjacent locking sleeves are rotatably provided with rotating bars, and the two adjacent rotating bars are connected by a connecting rod passing through the extension. The rotating bars are provided with a second slot on the end face facing the extension. The left and right ends of the extension are fixedly provided with two sets of blocks, and the blocks include two rubber blocks.

[0020] According to an advantageous embodiment, a guide portion is fixedly provided at the lower end of the extension portion, and two corresponding mounting seats are connected to the two ends of the guide portion. The guide portion is semi-circular and an arc groove is provided on the outer arc surface of the guide portion. Guide grooves for limiting the sliding column are provided on the inner walls of the left and right sides of the arc groove.

[0021] In summary, the present invention has the following beneficial effects: By setting vertical force points and ground contact force points, the present invention not only meets the test requirements for the load-bearing capacity of the suspension in the vertical direction, but also simulates turning, acceleration, or braking at the ground contact force points. The force transmission path is more in line with the actual situation. Furthermore, by adjusting the unit to change the angle of the combined force, different operating conditions can be simulated, improving the practicality of the device and increasing the diversity of simulated test conditions. In summary, the test process is more in line with reality, improving the reliability of the test results. In addition, the ease of implementation of the technical solution is also improved compared with the existing test process. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 A three-dimensional structural schematic diagram of a balanced suspension performance testing device provided according to an embodiment of the present invention is shown;

[0024] Figure 2 A partial structural schematic diagram of a balanced suspension performance testing device according to an embodiment of the present invention is shown;

[0025] Figure 3 A schematic diagram of an explosion between the upper housing, lower housing, and extension provided according to an embodiment of the present invention is shown;

[0026] Figure 4A partial perspective view of the structure between the slide block, slide rod, and mounting post provided according to an embodiment of the present invention is shown.

[0027] Figure 5 A partial perspective view of the structure between the slide, the slide rod, and the rotating seat provided according to an embodiment of the present invention is shown.

[0028] Figure 6 A schematic diagram illustrating the state of hydraulic rod angle change according to an embodiment of the present invention is shown;

[0029] Figure 7 A partial cross-sectional perspective view of the structure between the guide section, the lower housing, and the locking sleeve provided according to an embodiment of the present invention is shown.

[0030] Figure 8 A partial exploded view of the structure between the mounting base, locking sleeve, and U-shaped frame provided according to an embodiment of the present invention is shown.

[0031] Figure 9 A partial exploded view of the structure between the extension, the lower housing, and the rotating bar provided according to an embodiment of the present invention is shown.

[0032] Figure 10 A three-dimensional structural diagram of the suspension and balance wheel hub provided according to an embodiment of the present invention is shown.

[0033] The above-mentioned drawings include the following reference numerals: 1. Main frame; 10. Sub-frame; 20. Upper housing; 21. Lower housing; 220. Mounting block; 221. Closing frame; 222. Mounting seat; 223. Extension; 3. Drive unit; 30. Hydraulic rod; 31. Sliding column; 32. Threaded rod; 33. Mounting column; 34. Rotating seat; 4. Locking assembly; 40. Through groove; 41. Locking sleeve; 42. Locking groove; 43. U-shaped frame; 44. Rubber block one; 45. Slot one; 46. Rotating bar; 47. Slot two; 48. Rubber block two; 5. Adjustment unit; 50. Slide seat; 51. Scale; 52. Pointer; 53. Sliding rod; 530. Follower seat; 531. Locking cylinder; 532. Movable plug; 6. Guide part; 60. Guide groove. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] like Figure 1As shown, a balance suspension performance testing device is used in conjunction with a main frame 1 for fixing the balance suspension. It includes a sub-frame 10, on which two testing mechanisms are respectively located on the left and right sides of the balance suspension. The testing mechanism includes a clamping assembly for connecting with the balance wheel hub. The clamping assembly includes an upper shell 20 and a lower shell 21 distributed vertically. After the upper shell 20 and the lower shell 21 are closed and locked, they hold the balance wheel hub tightly.

[0036] like Figure 1 , Figure 2 and Figure 7 As shown, the test mechanism also includes a drive unit 3. The sub-frame 10 is equipped with a drive unit 3 that applies reciprocating force to the balance wheel hub through hydraulic operation. The drive unit 3 includes two hydraulic rods 30 that are symmetrically distributed front and rear. The telescopic ends of the hydraulic cylinders are equipped with sliding columns 31 that extend left and right along the axis. Different situations are simulated by moving the sliding columns 31 to the front and rear sides and below the balance wheel hub. The lower housing 21 is equipped with a locking component 4 for locking the position of the sliding columns 31.

[0037] like Figure 1 and Figure 2 As shown, the sub-frame 10 is provided with an adjustment unit 5 for adjusting the angle of the two hydraulic rods 30. The adjustment unit 5 includes two slides 50 distributed front and rear. The hydraulic rods 30 are set on the slides 50. The angle of the hydraulic rods 30 is adjusted by adjusting the position of the slides 50 and locking the slides 50 through the adjustment unit 5.

[0038] First, it needs to be clarified that, in order to simulate the various forces experienced by the suspension during normal use, in addition to the hydraulic rod 30 mentioned above, external hydraulic rods 30 at different angles are also provided on the hydraulic rod 30 to apply lateral forces to the balance wheel hub. Only the external hydraulic rods 30 used to apply lateral angular forces are shown in the figure. Furthermore, the sub-frame 10 is composed of multiple frame main bodies and serves as the fixing body for the aforementioned hydraulic rods 30 and numerous external hydraulic rods 30; that is, the main bodies used for installation and fixing all belong to the sub-frame 10. Secondly, the components such as the hydraulic rods 30 used to apply forces are part of an integrated, high-precision, high-dynamic-response closed-loop control system. Through the above system and the hydraulic rods 30, forces of the required direction, frequency, and magnitude can be applied to the suspension. These are all existing external technologies and will not be elaborated further. See also... Figure 10 The balanced suspension shown in this technical solution is only one type of suspension, and all suspensions have a balanced wheel hub, so this technical solution can meet the test requirements.

[0039] Before operation, the balance suspension is fixed to the main frame 1. At this time, the upper shell 20 and the lower shell 21 are closed and they are tightly held by the corresponding balance wheel hubs. The upper shell 20 and the lower shell 21 are locked, completing the connection steps with the suspension. When the hydraulic rod 30 applies force, it can be transmitted to the balance wheel hub and the suspension through the upper shell 20 and the lower shell 21, thereby simulating the real use of the suspension and finally testing the performance of the suspension.

[0040] When it is necessary to simulate the suspension stress in the vertical direction, the sliding column 31 is located on the front and rear sides of the lower housing 21, and the hydraulic rod 30 is made to be in a vertical state by the adjustment unit 5. The angle of the hydraulic rod 30 is locked by the locking slide 50. Then the hydraulic rod 30 works to apply a reciprocating force in the vertical direction to the lower housing 21 and the balance wheel hub. In addition, forces in different directions are applied by other external hydraulic rods 30 as described above, thereby simulating the usage under different stress angles, and the suspension performance is tested under such conditions.

[0041] See Figure 6 Furthermore, during the test of the wheel hub under lateral or longitudinal forces (mainly for the performance test of the suspension under turning, acceleration, or braking conditions), the sliding rod 31 is moved to the lower side of the lower housing 21, and the hydraulic rod 30 is tilted at the required angle by the adjustment unit 5. The hydraulic rod 30 is locked by locking the sliding seat 50. At this point, when the two hydraulic rods 30 are working, they will apply a combined force to the ground contact side of the wheel hub. The combined force can be divided into an upward force and a lateral force to the front and rear sides, which can simulate the suspension state of acceleration or braking. The external hydraulic rod 30 described above applies a force to the wheel hub to simulate turning, thereby simulating the suspension state of turning. In summary, by changing the tilt angle and the force application point on the balance wheel hub, the conditions of turning, braking, and acceleration are simulated. That is, by feeding back real suspension test data through the correct force transmission path, the real reliability of the test results is improved.

[0042] like Figure 3 As shown, the upper housing 20 consists of a mounting block 220, a closing frame 221, and a mounting block 220 from front to back, while the lower housing 21 consists of a mounting base 222, a closing frame 221, and a mounting base 222 from front to back.

[0043] The closing frame 221 is a semi-circular frame with a U-shaped cross section, and the mounting base 222 and the corresponding mounting block 220 are locked together by bolts.

[0044] Before operation, the lower housing 21 is positioned below the balance hub, and the balance hub is positioned within the U-shaped area of ​​the closing frame 221 on the lower housing 21. The upper housing 20 is then manually installed. After that, the bolts that pass through the mounting block 220 and the mounting base 222 are manually installed and the corresponding nuts are tightened. Finally, the upper housing 20 and the lower housing 21 are closed and locked together, completing the connection between the overall test drive and the balance hub.

[0045] like Figure 2 , Figure 4 and Figure 5 As shown, the slide 50 is slidably mounted on the sub-frame 10. A threaded rod 32 corresponding to the slide 50 is rotatably mounted on the sub-frame 10. The threaded rod 32 is connected to an external motor (not shown in the figure). The axis of the threaded rod 32 extends back and forth, and the threaded rod 32 passes through the corresponding slide 50 and is threadedly engaged with the slide 50.

[0046] In the first embodiment, a mounting post 33 with its axis extending left and right is rotatably mounted on the slide block 50, and the lower end of the hydraulic rod 30 is fixedly mounted on the corresponding mounting post 33.

[0047] In Embodiment 2, a vertically oriented rotating seat 34 is rotatably mounted on the slide 50, and a horizontally extending mounting post 33 is rotatably mounted on the rotating seat 34. The lower end of the hydraulic rod 30 is fixedly mounted on the corresponding mounting post 33. To better suit turning situations, the rotating seat 34 facilitates large-angle changes in the hydraulic rod 30, thus ensuring the wheel hub is already under stress during turning, closely resembling reality. The experimental procedures are the same as in Embodiment 1, and this technical solution uses the scenario in Embodiment 1 as an example for explanation.

[0048] like Figure 2 As shown, a scale 51 corresponding to the slide 50 is fixedly installed on the upper end face of the sub-frame 10, and a pointer 52 is fixedly installed on the slide 50. The pointer 52 and the scale 51 cooperate to display the tilt angle of the hydraulic rod 30 (for the case where the slide rod 31 is located on the front and rear sides and below the lower housing 21).

[0049] like Figure 1 and Figure 4 As shown, the adjustment unit 5 also includes a slide rod 53. Slide rods 53 extending left and right on both sides of the slide seat 50 are fixedly installed. The slide rod 53 passes through the sub-frame 10. A follower seat 530 corresponding to the slide rod 53 is slidably installed on the sub-frame 10. A locking cylinder 531 is slidably installed on the follower seat 530. The locking cylinder 531 is slidably sleeved on the corresponding slide rod 53. A sealing cavity is opened in the locking cylinder 531. A movable plug 532 is slidably installed in the sealing cavity. The movable plug 532 is fixedly installed at the tail of the slide rod 53. The sealing cavity is connected to an external hydraulic cylinder (not shown in the figure) through a connecting pipe.

[0050] The contact surfaces of the locking cylinder 531 and the sub-frame 10 are both made of materials with a high coefficient of friction.

[0051] Taking the application of vertical force as an example, the following explanation is given: The external motor drives the corresponding threaded rod 32 to rotate. Through the threaded engagement between the threaded rod 32 and the slide 50, the slide 50 moves in the front-to-back direction. During this process, the hydraulic rod 30 adaptively adjusts the length of its extension end. Finally, the distance between two adjacent slides 50 is minimized, and the slide column 31 is located in the mounting base 222. At this time, the hydraulic rod 30 is in a vertical state. Therefore, when the hydraulic rod 30 is working, it applies a vertical force to the balance wheel hub. Thus, the performance test of the suspension's load-bearing capacity and motion trajectory in the vertical direction is conducted.

[0052] Taking the application process of forces in lateral force tests and longitudinal force tests as an example: The slide block 50 moves back and forth as before. Through the adaptive adjustment of the hydraulic rod 30, the slide column 31 moves to directly below the lower housing 21. At this time, based on the comparison indication between the pointer 52 and the scale 51, the axial angle of the corresponding hydraulic rod 30 is determined. Subsequently, the slide column 31 and the slide block 50 are locked for performance testing. The combined force formed by the simultaneous operation of two adjacent hydraulic rods 30 not only simulates the situation of lateral or longitudinal forces, but also simulates the real-world use of the suspension during acceleration, braking, and cornering. Simultaneously, the force transmission path is changed to simulate the tire contact point, thus better reflecting actual usage and improving the realism of the test results. Furthermore, by changing the position of the slide block 50, the angle of the combined force can be changed to simulate different operating conditions, improving the practicality of the device, increasing the diversity of simulated test conditions, and making the performance test process more realistic.

[0053] Regarding the movement and locking process of the slide 50, it should be noted that when the slide 50 moves to the set position and needs to be locked, the external hydraulic cylinder operates to extract the gas or liquid from the sealed cavity, thereby causing the locking cylinder 531 to tightly adhere to the sub-frame 10. This ultimately increases the friction between the locking cylinder 531 and the sub-frame 10, thus locking the slide rod 53 and the slide 50, completing the angle adjustment of the hydraulic rod 30. It should be further noted that when the locking cylinder 531 tightly adheres to the sub-frame 10, by limiting the material of the contact surfaces, the friction between the two is maximized, thereby forming a lock. This locking requirement is suitable for variable angle testing requirements, and... The applied force for the test is small, and after testing by those skilled in the art, the locking requirements are met. There will be no change in the angle of the hydraulic rod 30 during the test. In addition, when the applied force is large and the angle change requirement is small, that is, when several test processes at set angles are required, the sliding rod 53 can be locked by an external mechanical limit locking method, such as the locking method of bolts and nuts or the locking method of direct limit jamming, which meets the above requirements. This technical solution only describes the first locking situation. The locking method with the required locking effect in the second locking situation can be met. It belongs to the external existing technology and will not be described in detail later.

[0054] like Figure 3 , Figure 7 , Figure 8 and Figure 9 As shown, the lower end of the closing frame 221 of the lower housing 21 is provided with an extension 223. The mounting base 222 is provided with through slots 40 extending from left to right, and the through slots 40 extend to the lower side of the mounting base 222. The extension 223 is also provided with two through slots 40 symmetrically arranged from front to back, and the through slots 40 on the extension 223 extend to the lower side of the extension 223.

[0055] Two symmetrical locking sleeves 41 are rotatably arranged inside the through groove 40. The portion of the locking sleeve 41 located inside the through groove 40 has a locking groove 42. The longitudinal section of the locking groove 42 is composed of a circular groove and a rectangular groove, wherein the rectangular groove extends through to the outer arc surface of the locking sleeve 41.

[0056] To facilitate the sliding pin 31 entering the corresponding locking groove 42, the edges of the locking groove 42 are chamfered, and both ends of the sliding pin 31 are chamfered. The diameter of the sliding pin 31 is smaller than the left and right distance between two adjacent locking grooves 42.

[0057] like Figure 7 and Figure 8 As shown, a U-shaped bracket 43 is fitted on two adjacent locking sleeves 41 on the front and rear sides of the balance wheel hub. A rubber block 44 is fixedly installed on the end face of the transverse section of the U-shaped bracket 43 facing the locking sleeve 41. Two slots 45 are opened on the mounting base 222, and the included angle between the two slots 45 is 90 degrees.

[0058] like Figure 7 and Figure 9 As shown, the left and right ends of the remaining two adjacent locking sleeves 41 are rotatably provided with rotating bars 46. The two adjacent rotating bars 46 are connected by a connecting rod that passes through the extension 223. The rotating bars 46 have a slot 47 on the end face facing the extension 223. Two sets of blocks are fixedly provided on the left and right ends of the extension 223. The block sets include two rubber blocks 48, and the included angle between the two rubber blocks 48 is 90 degrees.

[0059] As the sliding column 31 moves to the front and rear sides of the wheel hub, it enters the locking groove 42 of the corresponding two locking sleeves 41 along the through groove 40 on the mounting base 222. At this time, the rubber block 44 on the U-shaped frame 43 is located in one of the slots 45. Subsequently, the U-shaped frame 43 is manually rotated so that the corresponding locking sleeve 41 and the rubber block 44 rotate synchronously. The rubber block 44 exits the slot 45 and enters the remaining slot 45, thus completing the locking of the U-shaped frame 43 again. During the above process, the rectangular groove of the locking groove 42 rotates from the initial vertical downward direction to the front and rear side, thereby completing the locking of the sliding column 31.

[0060] As the sliding column 31 moves to the lower side of the balance hub, it enters the corresponding two locking slots 42 along the through groove 40 of the extension 223. At this time, one of the rubber blocks 48 is inserted into the slot 47. The rotating bar 46 is manually rotated, causing the corresponding locking sleeve 41 to rotate synchronously. Finally, the remaining rubber block 48 is inserted into the slot 47, and the rotating bar 46 is locked again. During the above process, the rectangular groove of the locking slot 42 rotates from the initial inclined direction to the front and rear sides, thereby completing the locking of the sliding column 31.

[0061] In summary, the above process can lock the sliding column 31 in the corresponding position, and the connection strength of the locking sleeve 41 can meet the force strength during the test. In addition, the above method can simulate different situations using two hydraulic rods 30, reducing the number of hydraulic rods 30, reducing the cost and layout difficulty of the test device, and improving the practicality of the device while meeting the test requirements.

[0062] like Figure 7 The lower end of the extension 223 is fixedly provided with a guide part 6. The two ends of the guide part 6 are connected to two corresponding mounting seats 222. The guide part 6 is semi-circular and the outer arc surface of the guide part 6 is provided with an arc groove. The inner walls of the left and right sides of the arc groove are provided with guide grooves 60 to restrict the sliding column 31. In order to facilitate the sliding column 31 to enter the extension 223, two rectangular grooves distributed in the front and back are provided on the inner arc surface of the guide part 6.

[0063] During the process of sliding column 31 moving from mounting base 222 to extension 223, the sliding column 31's movement path is limited by the cooperation between the guide groove 60 of guide part 6 and sliding column 31, ensuring that sliding column 31 can move accurately to the set position. In addition, the set position of sliding column 31 in extension 223 has been obtained by those skilled in the art through simulation tests. At this position, the contact point of the wheel hub can be simulated to the maximum extent, and the force transmission path under real use conditions can be simulated to the maximum extent, thereby improving the real reliability of the test.

[0064] It should be further explained that: existing technical solutions typically use force application points on both sides of the suspension's balance wheel hub and multiple hydraulic devices to apply force to simulate suspension usage. This technical solution adds a clamping assembly, a drive unit 3, a locking assembly 4, and an adjustment unit 5. The clamping assembly clamps the wheel hub and sets two force application points on the front, rear, and lower sides, simulating vertical and ground contact points. This allows for the evaluation of the suspension's load-bearing capacity and performance in the vertical direction, as well as its stress performance during cornering, acceleration, or braking. Especially for the ground contact point, the force transmission path is made more closely resemble actual usage. The adjustment unit 5 changes the angle of the combined force, simulating different operating conditions, improving the device's practicality, increasing the diversity of simulated test scenarios, making the test process more realistic, and improving the reliability of the test results. Furthermore, the added components are all existing conventional components and can be used long-term after a single installation. In summary, this technical solution is a specific improvement based entirely on and addressing the shortcomings of existing technologies.

[0065] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0066] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A balanced suspension performance test device, used in cooperation with a main frame for fixing a balanced suspension, characterized by, include: The sub-frame is provided with two test mechanisms. Each test mechanism includes a clamping assembly for connecting to the balance wheel hub. The clamping assembly includes an upper housing and a lower housing. When the upper housing and the lower housing are closed and locked, they hold the balance wheel hub tightly. The test mechanism also includes a drive unit. The sub-frame is equipped with a drive unit that applies reciprocating force to the balance wheel hub. The drive unit includes two hydraulic rods. The telescopic ends of the hydraulic cylinders are equipped with sliding columns that extend to the left and right along the axis. Different situations are simulated by moving the sliding columns to the front and rear sides and below the balance wheel hub. The lower housing is equipped with a locking component for locking the position of the sliding columns. The subframe is provided with an adjustment unit for adjusting the angle of the two hydraulic rods. The adjustment unit includes two slides distributed in front and behind. The hydraulic rods are mounted on the slides. The angle of the hydraulic rods is adjusted by adjusting the position of the slides and locking the slides through the adjustment unit. When the two hydraulic cylinders are adjusted to a vertical orientation and the slide is located on the front and rear sides of the balance wheel hub, a vertical reciprocating performance test is conducted. When the slide moves to the bottom of the balance wheel hub, the situation of the tire touching the ground is simulated, and the longitudinal force is simulated by adjusting the tilt angle of the hydraulic cylinders.

2. A device for testing the performance of a suspension according to claim 1, characterized in that: The upper housing consists of a mounting block, a closing frame, and a mounting block from front to back, while the lower housing consists of a mounting base, a closing frame, and a mounting base from front to back. The closing frame is a semi-circular frame with a U-shaped cross section, and the mounting base and the corresponding mounting block are locked together by bolts.

3. The balance suspension performance test device according to claim 1, characterized by: The slide block is slidably mounted on the sub-frame, and a threaded rod corresponding to the slide block is rotatably mounted on the sub-frame. The threaded rod passes through the corresponding slide block and is threadedly engaged with the slide block. The slide block is rotatably mounted with a mounting column, and the lower end of the hydraulic rod is fixedly mounted on the corresponding mounting column.

4. The balance suspension performance test device according to claim 1, characterized by: A scale corresponding to the slide is fixedly installed on the upper end face of the sub-frame, and a pointer is fixedly installed on the slide. The pointer and the scale work together to display the tilt angle of the hydraulic rod.

5. The balance suspension performance test device according to claim 1, characterized by: The adjustment unit also includes a slide rod. Slide rods are fixedly installed on both the left and right sides of the slide seat. The slide rods pass through the sub-frame. A follower seat corresponding to the slide rod is slidably installed on the sub-frame. A locking cylinder is slidably installed on the follower seat. The locking cylinder is slidably sleeved on the corresponding slide rod. A sealing cavity is opened in the locking cylinder. A movable plug is slidably installed in the sealing cavity. The movable plug is fixedly installed at the tail of the slide rod.

6. The balance suspension performance test device according to claim 1, characterized by: The lower end of the closing frame of the lower housing is provided with an extension, and a through groove is provided through the mounting base, extending to the lower side of the mounting base. The extension is also provided with two through grooves on the left and right sides, and the through grooves on the extension extend to the lower side of the extension. Two symmetrical locking sleeves are rotatably arranged inside the through groove. The portion of the locking sleeve located inside the through groove has a locking groove. The longitudinal section of the locking groove consists of a circular groove and a rectangular groove. The rectangular groove extends through to the outer arc surface of the locking sleeve. The diameter of the sliding column is smaller than the left-right distance between two adjacent locking grooves.

7. A balanced suspension performance test apparatus according to claim 6, wherein: A U-shaped frame is fitted on two adjacent locking sleeves on the front and rear sides of the balance wheel hub. A rubber block is fixedly installed on the end face of the transverse section of the U-shaped frame facing the locking sleeve. Two slots are provided on the mounting base.

8. The balance suspension performance test device according to claim 6, characterized by: The left and right ends of the remaining two adjacent locking sleeves are each provided with a rotating bar. The two adjacent rotating bars are connected by a connecting rod that passes through the extension. The rotating bar has a slot 2 on its end face facing the extension. The left and right ends of the extension are each fixedly provided with two sets of blocks, each of which includes two rubber blocks 2.

9. The balance suspension performance test apparatus according to claim 6, characterized by: The lower end of the extension is fixedly provided with a guide part, and the two ends of the guide part are connected to two corresponding mounting seats. The guide part is semi-circular and has an arc groove on its outer arc surface. The left and right inner walls of the arc groove are provided with guide grooves to restrict the sliding column.

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