Suspension test bench

Abstract

The utility model discloses a kind of suspension test benches, belong to suspension test technical field.Suspension test bench includes: first rack, the first rack includes connecting frame, suspension, the connecting frame with the suspension is detachably connected to adjust the installation height of the suspension, and the suspension includes wheel;Second rack, it is located in the side of the first rack, and the second rack includes drum, and the circumferential surface of the drum abuts the circumferential surface of the wheel;Backing plate, the first rack with the second rack is placed in the backing plate;Locking assembly, the locking assembly is used to fix the first rack with the second rack, and the locking assembly with the backing plate is detachably connected to adjust the interval size between the first rack with the second rack, solve the technical problem that current suspension test bench can only test specific size suspension generally.

Description

Technical Field

[0001] This utility model relates to the field of suspension testing technology, and in particular to a suspension testing bench. Background Technology

[0002] A quarter-scale suspension test bench is a laboratory device designed based on a quarter-scale vehicle model. It is used to simulate the dynamic response of a suspension system corresponding to a single wheel under different road surface excitations. Its functions include: 1. Replacing some real-vehicle testing, reducing R&D costs and time; 2. Comprehensively evaluating core suspension performance indicators; 3. Supporting suspension design optimization and technological innovation; 4. Simulating specific operating conditions to compensate for the limitations of real-vehicle testing, etc.

[0003] Furthermore, since test benches can simulate the driving conditions of suspension, they can also perform some tire tests by changing different types of tires. In the process of vehicle development, suspension test benches have a very wide range of applications.

[0004] However, current suspension test benches can usually only test suspensions of a specific size. When the size of the suspension changes, it is difficult to continue to be applicable. Therefore, a new suspension test bench is proposed to solve the technical problem that current suspension test benches can usually only test suspensions of a specific size. Utility Model Content

[0005] The main purpose of this utility model is to provide a suspension test bench, which aims to solve the technical problem that current suspension test benches can usually only test suspensions of a specific size.

[0006] To achieve the above objectives, the suspension test bench proposed in this utility model includes:

[0007] The first frame includes a connecting frame and a suspension, wherein the connecting frame is detachably connected to the suspension to adjust the installation height of the suspension, and the suspension includes wheels;

[0008] A second frame is located on one side of the first frame, and the second frame includes a drum, the circumferential surface of which abuts against the circumferential surface of the wheel;

[0009] A pad, on which the first frame and the second frame are placed;

[0010] A locking assembly for securing the first platform and the second platform, the locking assembly being detachably connected to the pad to adjust the spacing between the first platform and the second platform.

[0011] Optionally, in one embodiment of the present invention, the drum includes:

[0012] skeleton;

[0013] The drumhead surrounds the frame to form a ring, and the drumhead abuts against the wheel;

[0014] The raised strip is detachably connected to the drum surface and is used to simulate road surface protrusions.

[0015] Optionally, in one embodiment of the present invention, the protruding strip includes a first protruding strip and a second protruding strip, wherein the first protruding strip is wider than the second protruding strip.

[0016] Optionally, in one embodiment of the present invention, the pad has a T-slot, and the locking assembly includes:

[0017] A locking block, wherein a portion of the locking block extends into the T-slot and a portion protrudes from the T-slot and abuts against the first frame or the second frame, and the locking block has a threaded through hole that communicates with the T-slot;

[0018] A screw is threadedly connected to the locking block, and the screw abuts against the bottom of the T-slot to lock the locking block.

[0019] Optionally, in one embodiment of the present invention, a weighing sensor is further included. Two weighing sensors are provided: a first weighing sensor is provided above the shock absorber to measure the unsprung mass, and a second weighing sensor is provided above the shock absorber spring to measure the sprung mass.

[0020] Optionally, in one embodiment of the present invention, a distance sensor is further included, which cooperates with the baffle to determine the relative distance between the sensor and the baffle, the baffle being connected to the shock absorber.

[0021] Optionally, in one embodiment of the present invention, a counterweight is further included. A load plate is disposed above the second weighing sensor. The two sides of the second weighing sensor abut against the damping spring and the load plate, respectively. At least two guide posts are spaced apart on the side of the load plate away from the second weighing sensor. The counterweight is sleeved on the guide posts to adjust the spring mass.

[0022] Optionally, in one embodiment of the present invention, the skeleton includes two spaced-apart support plates, and the support plates have hollowed-out sections.

[0023] Optionally, in one embodiment of the present invention, the second frame further includes a driving device, which is connected to the drum drive.

[0024] Optionally, in one embodiment of the present invention, at least one of the first stand and the second stand includes a protective shell.

[0025] Compared with the prior art, the present invention can achieve at least the following beneficial effects. By using a locking assembly, the relative positions of the first and second frames can be adjusted, and the height of the suspension relative to the connecting frame can also be adjusted, thereby enabling the use of the frame to complete tests of suspensions of different sizes. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the suspension test bench of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the suspension test bench of this utility model;

[0029] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the suspension test bench of this utility model;

[0030] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0031] Figure 5 This is a front view of the rotating drum in the suspension test bench of this utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the raised strip in the suspension test bench of this utility model;

[0033] Figure 7 This is a perspective view of the suspension test bench of this utility model;

[0034] Figure 8 for Figure 7 Enlarged view of the structure at point B;

[0035] Figure 9 This is a structural schematic diagram of embodiment 3 of the suspension test bench of this utility model.

[0036] Explanation of icon numbers:

[0037] 100. First frame; 110. Connecting frame; 120. Suspension; 121. Wheel; 200. Second frame; 210. Drum; 211. Support plate; 212. Drum surface; 213. Raised strip; 300. Pad; 310. T-slot; 400. Locking assembly; 410. Locking block; 420. Screw; 510. First load cell; 520. Second load cell; 530. Distance sensor; 531. Baffle; 610. Load plate; 620. Counterweight; 630. Shock absorber; 640. Shock-absorbing spring; 650. Guide column; 660. Drive unit; 670. Protective shell;

[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0043] Suspension test benches are used in vehicle research and development. They allow for the testing of suspension performance, enabling optimization of any issues. One type of suspension test bench uses a quarter-segment structure for testing. Because this type of suspension includes wheels that can be driven, wheel performance can also be tested using a quarter-segment test bench. This makes quarter-segment suspension test benches widely applicable. This solution is proposed to improve the versatility of suspension test benches.

[0044] Reference Figures 1-5 The suspension test bench proposed in this solution includes a first bench 100, a second bench 200, a pad 300, and a locking assembly 400.

[0045] Specifically, the first frame 100 is used to install and support the suspension 120, and the second frame 200 is used to install the drum 210 and is located on one side of the first frame 100 so that the wheel 121 can abut against the drum 210; the pad 300 is used to support the first frame 100 and the second frame 200 to prevent the first frame 100 and the second frame 200 from directly contacting the ground; the locking assembly 400 is used to adjust the relative position between the first frame 100 and the second frame 200.

[0046] Current suspension test benches can usually only test suspension 120 structures of a specific size. When the size of the suspension 120 changes, it is usually necessary to design a test bench corresponding to the size of the suspension 120 to be tested.

[0047] In this solution, by using the locking component 400, the relative positions of the first frame 100 and the second frame 200 can be adjusted, and the height of the suspension 120 relative to the connecting frame 110 can also be adjusted, thereby enabling the use of the frame to complete tests of suspensions of different sizes. Example 1

[0048] Reference Figure 2 The locking assembly 400 can be made of bolts, and through holes are made in the bottom of the first frame 100 and the second frame 200, and through slots are made in the pad 300. First, the first frame 100 and the second frame 200 are moved to a suitable position, and bolts are passed through the through holes and through slots. The bolts are then tightened with nuts at the bottom of the pad 300, thereby fixing the first frame 100 and the second frame 200.

[0049] Understandably, in order to achieve fixation at different positions, the through groove of the pad 300 extends along the axial length of the pad 300. In addition, the pad 300 is made of metal and is relatively thick, with high structural strength. Even after the through groove is opened, it can still provide stable support for the first frame 100 and the second frame 200. Example 2

[0050] Reference Figures 3-4 A T-slot 310 can also be formed on the pad 300. In this design, the bottom width of the T-slot 310 is greater than the opening width, and the T-slot 310 has a through structure along the axial direction of the pad 300. The cross-section of the selected locking block 410 is approximately "I" shaped, and the locking block 410 has a threaded through hole. When fixing the first frame 100 and the second frame 200, first adjust the first frame 100 and the second frame 200 to the desired position. At this time, the locking block 410 is partially inserted into the T-slot 310 from one end of the pad 300. Move the locking block 410 along the T-slot 310 until the locking block 410 abuts against the circumferential surface of the first frame 100 or the second frame 200. After abutting, screw 420 is screwed into the threaded through hole. When the screw 420 passes through the locking block 410, it enters the T-slot 310. As the screw 420 continues to be screwed in, the screw 420 abuts against the bottom of the T-slot 310. At the same time, the locking block 410 is pressed against the inner wall of the T-slot 310. At this time, the position of the locking block 410 is fixed, and the relative position of the first frame 100 and the second frame 200 is fixed by the locking block 410.

[0051] To facilitate the screw 420 being screwed in, a wing nut or a wing screw can be used. In addition to the locking block 410 structure with an "I"-shaped cross section, a locking block 410 structure with a "⊥"-shaped cross section can also be selected.

[0052] In Embodiments 1 and 2, Embodiment 2 is the preferred embodiment, and its locking operation is simpler than that of Embodiment 1. It should be noted that during the suspension 120 test, the movement tendency of the first frame 100 and the second frame 200 is not drastic, and their own weight can reduce the movement tendency to a certain extent. Therefore, the locking structure in Embodiments 1 and 2 can lock the first frame 100 and the second frame 200.

[0053] The above are two technical solutions proposed in this plan that can achieve locking between the first frame 100 and the second frame 200. Depending on the specific application environment of the frame, other types of locking structures can also be selected.

[0054] Furthermore, the other structures in this scheme will be explained.

[0055] Reference Figure 3 and Figures 5-6 This design also includes a rotating drum 210, which contacts the wheel 121 and is used to simulate the road surface. Specifically, the rotating drum 210 in this design consists of a frame, a drum surface 212, and raised strips 213. The frame serves as the supporting structure for the rotating drum 210 and is circular in shape. The drum surface 212 surrounds the outer periphery of the frame to form a ring to simulate the road surface. Specifically, the wheel 121 contacts the drum surface 212.

[0056] To simulate different road conditions, raised strips 213 are used to elevate the drum surface 212, thus simulating road surface protrusions. The drum surface 212 has multiple mounting holes, and the raised strips 213 have corresponding holes. When installing the raised strips 213, they can be secured to the drum surface 212 using bolts and nuts. It is understood that because the drum surface 212 has multiple mounting holes, the raised strips 213 can be installed in different positions to achieve diversification of road condition simulations.

[0057] Specifically, the raised strip 213 includes a first raised strip and a second raised strip, wherein the first raised strip is wider than the second raised strip to simulate the different widths of road surface protrusions.

[0058] Of course, different heights of the raised strips 213 can be set, or different textures can be designed on the raised surface of the raised strips 213 to more comprehensively test the performance of the suspension 120.

[0059] Specifically, the frame consists of two spaced support plates 211. To reduce the mass of the drum 210, a hollow structure is provided on the support plates 211.

[0060] Furthermore, refer to Figures 7-8 In order to collect relevant data of the suspension 120 during the movement, this solution also includes a sensor group, which includes at least a weighing sensor and a distance sensor 530. Depending on the test items, an acceleration sensor, a body sensor, etc. can also be added.

[0061] The distance sensor 530 is used in conjunction with the baffle 531. Specifically, a mounting bracket is installed on the top of the vibration damper 630, and the distance sensor 530 is mounted on the mounting bracket. The baffle 531 is connected to the vibration damper 630. The distance sensor 530 is used to measure the relative distance between the sensor position and the position of the baffle 531. When the vibration damper 630 is working, the vibration damper 630 will generate a contraction movement. At this time, the distance data measured by the sensor will change, thus obtaining some performance parameters of the vibration damper 630 during its working process.

[0062] There are two weighing sensors, namely a first weighing sensor 510 and a second weighing sensor 520. The first weighing sensor 510 is used to measure the unsprung mass, and the second sensor is used to measure the sprung mass.

[0063] The first load cell 510 is mounted on the top of the shock absorber 630 via a mounting bracket. A pressure plate is provided on the top of the first load cell 510 so that the first load cell 510 can normally measure the unsprung mass. The unsprung mass is usually read under static conditions. Of course, the performance of the shock absorber 630 can also be evaluated by observing the changes in the value of the first load cell 510 under dynamic conditions.

[0064] The second load cell 520 is mounted on the top of the damping spring 640 via a mounting bracket. The second load cell 520 abuts against the load plate 610. The load plate 610 is used to support the counterweight 620. At least two guide posts 650 are also connected to the load plate 610. The guide posts 650 are used to fit the counterweight 620 to fix the counterweight 620. The mass on the spring is adjusted by increasing or decreasing the number of counterweights 620.

[0065] Taking the example of setting two guide posts 650, under normal circumstances, each counterweight 620 has two guide holes, and the two guide posts 650 respectively cooperate with the two guide holes of the counterweight 620, resulting in a relatively balanced load. To increase the diversity of testing, a smaller counterweight 620 with only one guide hole can be designed. By additionally setting a small-volume counterweight 620 on one of the guide posts 650, unbalanced loading can be achieved. It can be understood that by increasing the number of guide posts 650 or adjusting the position of the guide posts 650, different loading methods can be achieved.

[0066] Typically, the performance of the damping spring 640 is evaluated by observing the readings of the second sensor under dynamic conditions.

[0067] In one specific design, the damping spring 640 is an air spring, and an air compressor is provided to supply air to the air spring.

[0068] Reference Figures 2-3Furthermore, the second frame 200 also includes a drive device 660, which drives the drum 210, thereby causing the drum 210 to move the wheel 121 that is in contact with it, thus simulating the state of the suspension 120 during driving.

[0069] Specifically, in the second frame 200, the interior of the second frame 200 is a hollow structure, used to install the drum 210 and the drive device 660, and a support frame is set to support the drive device 660 and the drum 210 respectively.

[0070] The drum 210 also includes a rotating shaft with bearings at both ends. One end of the rotating shaft is connected to the drive device 660. Specifically, the drive device 660 can be a geared motor. Since the bearings, geared motors and other methods of driving the drum 210 are existing technologies, those skilled in the art can understand how they are implemented, so they will not be elaborated here.

[0071] In this design, wheel 121 is driven and is used for ride comfort and road excitation response testing, non-drive wheel operating condition testing, and coasting or inertial driving simulation.

[0072] Alternatively, a drive unit can be set to drive the suspension 120, so that the wheel 121 rotates actively to drive the drum 210 to rotate. When the wheel 121 drives the drum 210 to rotate, it is used to test the dynamic characteristics of the suspension 120 under driving conditions, the coupling characteristics of the power transmission system and the suspension 120, and the driving wheel braking transition condition.

[0073] Furthermore, at least one of the first frame 100 and the second frame 200 in this solution is provided with a protective shell 670. Preferably, both the first frame 100 and the second frame 200 are provided with a protective shell 670 to protect their internal structures.

[0074] All of the aforementioned schemes were tested based on a 1 / 4 suspension structure.

[0075] Furthermore, refer to Figure 9 Example 3 is proposed. Example 3

[0076] Example 3 is a combined structure. In this example, a first frame 100 is provided, a suspension 120 is provided on both sides of the connecting frame 110, and a second frame 200 is provided on both sides of the first frame 100, so as to simulate the front suspension 120 structure or the rear suspension 120 structure. In this example, the two drums 210 can use the same surface structure for observation, or different surface structures can be used to form a comparison.

[0077] It is understandable that, in addition to combining to form a front suspension 120 structure or a rear suspension 120 structure, a test structure with two suspensions 120 on one side can also be formed by combining them, and no restrictions are imposed here.

[0078] In addition, in the three embodiments proposed in this solution, materials of different strengths can be selected according to the different loads to be borne by the connecting frame 110, as long as they can meet the requirements for stable connection of the suspension 120.

[0079] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A suspension test bench, characterized in that, include: The first frame includes a connecting frame and a suspension, wherein the connecting frame is detachably connected to the suspension to adjust the installation height of the suspension, and the suspension includes wheels; A second frame is located on one side of the first frame, and the second frame includes a drum, the circumferential surface of which abuts against the circumferential surface of the wheel; A pad, on which the first frame and the second frame are placed; A locking assembly for securing the first platform and the second platform, the locking assembly being detachably connected to the pad to adjust the spacing between the first platform and the second platform.

2. The suspension test bench as described in claim 1, characterized in that, The drum includes: skeleton; The drumhead surrounds the frame to form a ring, and the drumhead abuts against the wheel; The raised strip is detachably connected to the drum surface and is used to simulate road surface protrusions.

3. The suspension test bench as described in claim 2, characterized in that, The raised strip includes a first raised strip and a second raised strip, wherein the first raised strip is wider than the second raised strip.

4. The suspension test bench as described in claim 1, characterized in that, The pad has a T-slot, and the locking assembly includes: A locking block, wherein a portion of the locking block extends into the T-slot and a portion protrudes from the T-slot and abuts against the first frame or the second frame, and the locking block has a threaded through hole that communicates with the T-slot; A screw is threadedly connected to the locking block, and the screw abuts against the bottom of the T-slot to lock the locking block.

5. The suspension test bench as described in claim 1, characterized in that, It also includes two weighing sensors: a first weighing sensor is positioned above the damper to measure the unsprung mass, and a second weighing sensor is positioned above the damping spring to measure the sprung mass.

6. The suspension test bench as described in claim 5, characterized in that, It also includes a distance sensor, which cooperates with a baffle to determine the relative distance between itself and the baffle, the baffle being connected to the shock absorber.

7. The suspension test bench as described in claim 5, characterized in that, It also includes a counterweight, a load plate is provided above the second load cell, the two sides of the second load cell are respectively in contact with the damping spring and the load plate, and at least two guide posts are provided at intervals on the side of the load plate away from the second load cell. The counterweight is sleeved on the guide posts to adjust the spring mass.

8. The suspension test bench as described in claim 2, characterized in that, The frame includes two spaced-apart support plates, and the support plates have hollowed-out sections.

9. The suspension test bench as described in claim 1, characterized in that, The second frame also includes a drive unit, which is connected to the drum drive.

10. The suspension test bench as described in claim 1, characterized in that, At least one of the first frame and the second frame includes a protective housing.

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