Suspension assembly and crash test trolley

Abstract

The utility model relates to the technical field of automobile crash tests, and specifically provides a suspension assembly and a crash test trolley. The suspension assembly comprises a suspension main body and a wheel mounting frame arranged on the suspension main body, the suspension main body comprises a back plate used for being connected with a frame, a wheel mounting seat which is arranged on the back plate in a manner of moving up and down, and a shock absorber; the wheel mounting frame is arranged on the wheel mounting seat, the top height position of the shock absorber is adjustably arranged on the back plate, and the bottom of the shock absorber is connected with the wheel mounting frame. According to the suspension assembly, the height positions of the shock absorbers, the wheel mounting seats and the wheels on the frame can be changed by adjusting the height positions of the tops of the shock absorbers on the back plate, so that the effect of changing the height of the trolley is achieved, and the height of the mass center of the trolley is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile collision test, in particular to a suspension assembly. In addition, the utility model also relates to a collision test trolley. Background Art

[0002] Crash test trolleys are widely used in various types of crash tests. Commonly used crash test trolleys include frontal MPDB crash trolleys, side impact trolleys, and rear impact trolleys. The structure of a crash test trolley generally adopts a double-layer longitudinal beam frame, and its mass, center of mass, track width, wheelbase, and frame dimensions have clear requirements.

[0003] Crash test trolleys typically use a trolley suspension system to assemble wheels to ensure trolley stability and impact accuracy during testing. Currently, there are two main types of trolley suspension systems. One is a fixed type, in which the wheels are rigidly fixed to the outside of the frame. This type has a simple structure, but the wheels are prone to shaking during trolley movement. The other is a coil spring type, in which one end of the suspension assembly is fixed to the trolley bracket and the other end is connected to a swing arm, which is then rigidly connected to the wheel. This type uses the coil spring to filter out the up and down movement of the wheel, better ensuring the accuracy of the test impact.

[0004] However, neither of the above two methods can change the position of the wheels. Once the trolley is designed, the wheelbase and center of mass height of the trolley are fixed. When the crash test trolley needs to simulate vehicles with different wheelbases or different center of mass heights to test the corresponding collision effects, the trolley needs to be redesigned and manufactured according to the wheelbase and center of mass height parameters of the test vehicle, resulting in high crash test costs and affecting the test progress. Utility Model Content

[0005] In view of this, the present invention aims to provide a suspension assembly to provide conditions for adjusting the height of the center of mass of the trolley.

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

[0007] A suspension assembly includes a suspension body and a wheel mounting frame provided on the suspension body; the suspension body includes a back plate for connecting to a vehicle frame, a wheel mounting seat provided on the back plate and movable up and down, and a shock absorber;

[0008] The wheel mounting frame is arranged on the wheel mounting seat, the top height position of the shock absorber is adjustable on the back plate, and the bottom of the shock absorber is connected to the wheel mounting frame.

[0009] Furthermore, the back plate is provided with a plurality of groups of mounting holes, and the mounting holes in each group are arranged at intervals in the front-rear direction of the frame; the back plate can be fixedly connected to the frame through any group of the mounting holes.

[0010] Furthermore, the back plate is provided with a plurality of shock absorber seat fixing holes, each of the shock absorber seat fixing holes is constructed as a long strip hole arranged up and down, the top of the shock absorber is fixedly connected to the shock absorber seat, and the shock absorber seat is fixed to the back plate by a fastener passing through the shock absorber seat fixing hole.

[0011] Furthermore, a height-adjustable limiting column is provided on the back plate, and the limiting column is used to limit the height position of the shock-absorbing seat and / or the highest upward position of the wheel mounting seat.

[0012] Furthermore, the wheel mounting seat is provided with a plurality of mounting plate connecting holes, each of which is constructed as an elongated hole arranged vertically. The wheel mounting seat is mounted on the back plate by fasteners passing through the mounting plate connecting holes to allow the wheel mounting seat to move up and down relative to the back plate.

[0013] Furthermore, the wheel mounting frame includes a swing arm mechanism hinged to the wheel mounting seat, and a wheel mounting plate installed on the swing arm mechanism for fixing the wheel; the shock absorber is hinged to the top of the swing arm mechanism, and as the shock absorber extends and retracts, the wheel moves up and down relative to the wheel mounting seat.

[0014] Furthermore, the wheel mounting seats are arranged in two spaces in an upper and lower manner, and the swing arm mechanism includes an upper swing arm mechanism and a lower swing arm mechanism respectively provided on the two wheel mounting seats;

[0015] The shock absorber is hinged on the upper swing arm mechanism, and the wheel mounting plate is connected to both the upper swing arm mechanism and the lower swing arm mechanism.

[0016] Furthermore, the upper swing arm mechanism includes an upper bracket fixedly connected to the upper part of the wheel mounting plate, and an upper swing arm hinged between the upper bracket and the wheel mounting seat above, and the shock absorber is hinged to the top of the upper bracket; the lower swing arm mechanism includes a lower bracket fixedly connected to the lower part of the wheel mounting plate, and a lower swing arm hinged between the lower bracket and the wheel mounting seat below.

[0017] Furthermore, the hinged portion in the swing arm mechanism adopts a flexible connection to form a buffer when a force occurs between the two hinged parts.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The suspension assembly of the present invention uses the back plate as the installation basis to complete the installation and fixation of the suspension assembly on the frame. The wheel mounting seat is set on the back plate in a movable manner, so that the wheel can vibrate up and down relative to the trolley when the trolley is moving, and buffering is achieved through the elastic expansion and contraction of the shock absorber; at the same time, by adjusting the height position of the top of the shock absorber on the back plate, the height position of the shock absorber, the wheel mounting seat and the wheel on the frame can be changed, thereby achieving the effect of changing the height of the trolley, and then realizing the adjustment of the height of the center of gravity of the trolley.

[0020] In addition, mounting holes are provided on the back panel, through which mounting bolts or other fasteners can be screwed to pre-reserved screw holes on the frame. Multiple sets of mounting holes are provided on the back panel, and the multiple sets of mounting holes are spaced apart in the front-to-back direction of the frame. By selecting mounting holes in different front-to-back positions, the front-to-back position of the back panel on the frame can be adjusted. In this way, by adjusting the back panels of the front and rear wheels relative to each other, the wheelbase of the front and rear wheels of the trolley can be changed.

[0021] Another object of the present invention is to provide a crash test trolley equipped with the suspension assembly of the present invention. The crash test trolley of the present invention has the technical advantages of the suspension assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention. Terms such as front and back, top and bottom, etc., used therein are only intended to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the suspension assembly and the wheel according to an embodiment of the present utility model;

[0024] Figure 2 This is a schematic structural diagram of a suspension assembly according to an embodiment of the present utility model;

[0025] Figure 3 for Figure 2 The structure diagram of the suspension assembly shown is after the wheel mounting plate is hidden;

[0026] Figure 4 This is a schematic diagram of the overall structure of the collision test trolley according to an embodiment of the present utility model;

[0027] Figure 5 This is a side view of the collision test trolley according to an embodiment of the present utility model.

[0028] Description of reference numerals:

[0029] 1. Suspension body; 10. Wheel; 100. Wheel mounting plate; 11. Back plate; 110. Mounting holes; 111. Upper jackscrew bracket; 112. Shock absorber mounting hole; 113. Lower jackscrew bracket;

[0030] 12. Shock absorber seat; 120. First fastening bolt; 121. Second fastening bolt;

[0031] 13. Shock absorber; 14. Wheel mounting seat; 140. Mounting plate connection hole;

[0032] 15. Upper swing arm mechanism; 150. Upper swing arm; 151. Upper bracket;

[0033] 16. Lower swing arm mechanism; 160. Lower swing arm; 161. Lower bracket;

[0034] 171. Top screw; 172. Bottom screw;

[0035] 18. Install the bolts;

[0036] 2. Middle frame; 3. Front frame; 4. Rear frame. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0038] In the description of the present invention, it should be stated that if there are terms such as "up, down, left, right, front, back, inside, outside" that indicate directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed or operated in a specific direction. Therefore, it cannot be understood as a limitation on the present invention. Taking the trolley described in the present invention as an example, the direction words such as "up, down, left, right, front, back" used in the embodiments are defined based on the up and down direction (also called the height direction), the left and right direction (also called the width direction) and the front and back direction (also called the length direction) of the vehicle. Specifically, as shown in the accompanying drawings, the X direction is the front and back direction of the vehicle, wherein the side to which the arrow points is "front", and the opposite is "back". The Y direction is the left and right direction of the vehicle, wherein the side to which the arrow points is "left", and the opposite is "right". The Z direction is the up and down direction of the vehicle, wherein the side to which the arrow points is "up", and the opposite is "down". "Inside" and "outside" are defined based on the outline of the corresponding components. For example, "inside" and "outside" are defined based on the vehicle outline. The side of the vehicle outline close to the middle of the vehicle is "inside", and the opposite side is "outside".

[0039] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection", and "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances. The limiting terms such as "first, second, A, B, C, D" that appear in the description of the present invention are only used to distinguish similar features of different positions, affiliations or uses, so as to achieve the purpose of avoiding ambiguity and confusion, and cannot be understood as indicating or implying relative importance.

[0040] The MPDB mentioned in this utility model description is an abbreviation for "Mobile Progressive Deformable Barrier." The MPDB crash test primarily involves having a vehicle strike the MPDB at a specific speed to test the vehicle's collision safety performance.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0042] Example 1

[0043] This embodiment relates to a suspension assembly, which provides conditions for adjusting the height of the center of mass of the trolley; an exemplary structure thereof is as follows Figure 1 、 Figure 2 and Figure 3 shown.

[0044] Generally speaking, the suspension assembly comprises a suspension body 1 and a wheel mounting bracket mounted on the suspension body 1 for mounting a wheel 10. The suspension body 1 comprises a back plate 11 for connection to the vehicle frame, a wheel mounting seat 14 movably mounted on the back plate 11, and a shock absorber 13. The wheel mounting bracket is mounted on the wheel mounting seat 14. The top of the shock absorber 13 is adjustable on the back plate 11, and the bottom of the shock absorber 13 is connected to the wheel.

[0045] It should be noted that, based on the above-mentioned overall design concept, the technical solution of the present invention can adopt a variety of different specific implementation structures, forms, or configuration sequences. For example, the position adjustment method of the wheel mounting seat 14 on the back plate 11 can adopt a screw structure, which can be adjusted by rotating the screw to adjust the wheel mounting seat 14 to the appropriate position and then locked, or it can adopt a method of locking after the slide groove is moved; the specific setting sequence and installation method of the shock absorber 13, wheel mounting seat 14, wheel mounting frame, etc. can also be flexibly adjusted. For parts required for the implementation of the overall solution but not included in the above-mentioned overall setting, reasonable and flexible designs can be made by referring to mature setting methods in the field and actual implementation conditions. The specific implementation scheme described below in this embodiment is only a preferred one of the many solutions that can be formed by the various combinations and variations of the above-mentioned specific forms. In actual implementation, those skilled in the art can make flexible adjustments and improvements based on actual conditions. Obviously, the various solutions that can be formed by the combinations and variations of the various specific forms described above, as well as the specific implementation scheme of this embodiment, are all within the scope of protection of the present invention.

[0046] The vehicle frame equipped with the suspension assembly can be either an integrated or split frame. The frame of this embodiment includes a front frame 3, a middle frame 2, and a rear frame 4, all connected front and rear. A suspension assembly of this embodiment is located on each left and right side of the front and rear frames 3 and 4 to facilitate mounting of four wheels 10. By adjusting the height of the top of the shock absorber 13 on the backplate 11 of each of the four suspension assemblies, the height positions of the shock absorber 13, the wheel mounting base 14, and the wheel 10 can be varied, thereby changing the center of mass of the entire vehicle.

[0047] Specifically, the back plate 11 of this embodiment is provided with a plurality of groups of mounting holes 110, and each group of mounting holes 110 is arranged at intervals in the front-to-back direction of the frame; the back plate 11 can be fixedly connected to the frame through any group of mounting holes 110. The back plate 11 is provided with mounting holes 110, and fasteners such as mounting bolts 18 can be used to screw the back plate 11 to the pre-reserved screw holes on the frame through the mounting holes 110. A plurality of groups of mounting holes 110 are provided on the back plate 11, and the plurality of groups of mounting holes 110 are arranged at intervals in the front-to-back direction of the frame. By selecting mounting holes 110 in different front-to-back positions, the front-to-back position of the back plate 11 on the frame can be adjusted. In this way, by relatively adjusting the back plate 11 of the front and rear wheels of the trolley, the wheelbase of the front and rear wheels of the trolley can be changed.

[0048] Based on the configuration of the back plate 11, the top of the shock absorber 13 can be fixed to the back plate 11 via the shock absorber seat 12. The shock absorber seat 12 is also configured to be height-adjustable on the back plate 11 to achieve height adjustment of the fixed position of the top of the shock absorber 13 on the back plate 11. Specifically, in this embodiment, the back plate 11 is provided with a plurality of shock absorber seat fixing holes 112. Each of the shock absorber seat fixing holes 112 is configured as an elongated hole arranged vertically. The shock absorber seat 12 is fixed to the back plate 11 via fasteners inserted into the shock absorber seat fixing holes 112.

[0049] A shock absorber mount 12 is provided on the back plate 11, providing a good mounting base for the top of the shock absorber 13. In this embodiment, three first fastening bolts 120 are provided through the shock absorber mount 12 to securely connect the shock absorber 13 to the shock absorber mount 12. The shock absorber mount 12 is designed to be adjustable, allowing its height on the back plate 11 to be changed. This not only allows the height of the shock absorber 13, the wheel mount 14, and the wheel 10 on the vehicle frame to be adjusted as needed, but also adjusts the stiffness of the shock absorber 13. Specifically, the shock absorber mount 12 and the back plate 11 are connected by second fastening bolts 121 that pass through the shock absorber mount fixing holes 112 on the back plate 11 and are tightened with nuts. By adjusting the height of the second fastening bolts 121 within the shock absorber mount fixing holes 112, the position of the shock absorber mount 12 can be easily adjusted.

[0050] In addition, if Figure 3 As shown, the back plate 11 of this embodiment is provided with a height-adjustable limiting post, which can be used to limit the height position of the shock absorber 12 and / or the highest upward position of the wheel mounting seat 14. Limiting posts are respectively provided above the shock absorber 12, the wheel mounting seat 14, etc., to form a pressure limit on the shock absorber 12 and the wheel mounting seat 14 from above; the limiting post located above the shock absorber 12 abuts against the shock absorber 12, which can improve the reliability of the shock absorber 12 fixed on the back plate 11; the limiting post located above the wheel mounting seat 14 can be fixed at the extreme upward position of the wheel mounting seat 14 to achieve the limit of the highest upward position of the wheel mounting seat 14, thereby improving the shock absorption performance and load-bearing performance of the suspension assembly.

[0051] The limiting column can be designed in various forms. In this embodiment, an upper jackscrew bracket 111 is provided at the top of the back plate 11, and a lower jackscrew bracket 113 is fixedly mounted on the back plate 11 above the wheel mounting seat 14. The limiting column includes an upper jackscrew 171 screwed to the upper jackscrew bracket 111 and a lower jackscrew 172 screwed to the lower jackscrew bracket 113. By screwing and rotating the upper jackscrew 171 or the lower jackscrew 172, their height positions on the back plate 11 can be changed. The bottom end of the upper jackscrew 171 abuts against the shock absorber 12 to limit the height position of the shock absorber 12. The bottom end of the lower jackscrew 172 is adjusted to the upper limit position of the wheel mounting seat 14 to limit the highest upward position of the wheel mounting seat 14. In addition, by fine-tuning the upper jackscrew 171 and the lower jackscrew 172, the height of the shock absorber 12 and the wheel mounting seat 14 can also be fine-tuned.

[0052] As mentioned above, various structural options are available for the vertically movable arrangement of the wheel mount 14 on the back plate 11. In this embodiment, the wheel mount 14 is provided with a plurality of mounting plate connection holes 140, each of which is configured as a vertically arranged elongated hole. The wheel mount 14 is attached to the back plate 11 via fasteners inserted through the mounting plate connection holes 140. The fasteners are fixedly connected to the back plate 11 and slide within the mounting plate connection holes 140, thereby allowing the wheel mount 14 to move vertically relative to the back plate 11. This movable mounting method, employing a bolt pair coupled with elongated holes, offers the advantages of simple structure, high efficiency, and ease of fabrication. Similar to the height adjustment method of the shock absorber seat 12, when the position of the mounting bolt 18 passing through the mounting plate connecting hole 140 slides up and down in the mounting plate connecting hole 140 and changes, the wheel mounting seat 14 can be moved up and down on the back plate 11; two mounting plate connecting holes 140 are arranged at intervals on the left and right to ensure the movement stability and reliability of the wheel mounting seat 14 on the back plate 11.

[0053] To enhance the structural stability of the wheel 10's connection to the suspension assembly and the shock absorption effect between the shock absorber 13 and the wheel mounting frame, the wheel mounting frame of this embodiment includes a swing arm mechanism hingedly connected to the wheel mounting base 14, and a wheel mounting plate 100 mounted on the swing arm mechanism for securing the wheel 10. The shock absorber 13 is hingedly connected to the top of the swing arm mechanism. As the shock absorber 13 expands and contracts, the wheel 10 swings up and down relative to the wheel mounting base 14, achieving effective shock absorption.

[0054] Specifically, in this embodiment, there are two wheel mounting seats 14 arranged at intervals in the upper and lower directions. Accordingly, the swing arm mechanism includes an upper swing arm mechanism 15 and a lower swing arm mechanism 16 respectively provided on the two wheel mounting seats 14; the bottom of the shock absorber 13 is hinged to the upper swing arm mechanism 15, and the wheel mounting plate 100 is connected to both the upper swing arm mechanism 15 and the lower swing arm mechanism 16.

[0055] The two wheel mounting brackets 14, spaced apart from each other, provide an assembly foundation for the dual swing arm configuration. This also facilitates the synchronous swinging of the upper and lower swing arm mechanisms 15, 16, creating a four-bar linkage transmission effect. This allows the wheel 10 to move vertically under the swinging motion of the two swing arm mechanisms, achieving excellent shock absorption while ensuring the smooth movement of the trolley. The dual swing arm design of the upper and lower swing arm mechanisms 15, 16, through their vertical connection to the wheel mounting plate 100, enhances the structural stability of the wheel mounting plate 100, thereby ensuring the stability of the wheel 10.

[0056] Specifically, the upper swing arm mechanism 15 of this embodiment includes an upper bracket 151 fixedly connected to the upper portion of the wheel mounting plate 100, and an upper swing arm 150 hinged between the upper bracket 151 and the wheel mounting seat 14 above. The shock absorber 13 is hinged to the top of the upper bracket 151. The lower swing arm mechanism 16 can be configured similarly to the upper swing arm mechanism 15, that is, the lower swing arm mechanism 16 includes a lower bracket 161 fixedly connected to the lower portion of the wheel mounting plate 100, and a lower swing arm 160 hinged between the lower bracket 161 and the wheel mounting seat 14 below.

[0057] The upper swing arm mechanism 15 is hinged between an upper swing arm 150 and an upper bracket 151, while the lower swing arm mechanism 16 is hinged between a lower swing arm 160 and a lower bracket 161, resulting in a simple and efficient structure. The upper and lower swing arms 150, 160 extend outward from the hinged portion of the wheel mounting base 14, with their ends hingedly connected to the corresponding upper and lower brackets 151, 161, achieving a good swinging effect. The upper swing arm 150 preferably adopts a downwardly arched design, with sufficient space reserved above the upper swing arm 150 to avoid interference with the bottom of the shock absorber 13 and mitigate the risk of collision between the upper swing arm mechanism 15 and the shock absorber 13 during a collision. The lower swing arm 160 can also adopt a downwardly arched structure.

[0058] Based on the above-mentioned configuration, it is preferred that each hinged joint in the swing arm mechanism utilize a flexible connection to provide a buffer when forces act on the two hinged components. Specifically, the axle pins at the hinged ends of the upper and lower swing arms 150, 160 can be fitted with wear-resistant rubber sleeves, creating a buffering effect between the axle pins and the hinge holes, thus forming a flexible connection. This significantly improves the stability of the suspension assembly, allowing the vehicle to smoothly swing up and down based on the road surface smoothness during driving, achieving excellent vehicle stability and alleviating the problem of wheel deviation caused by up and down bouncing.

[0059] To sum up, the suspension assembly of this embodiment uses the back plate 11 as the installation base to complete the installation and fixation of the suspension assembly on the frame, and the wheel mounting seat 14 is set on the back plate 11 in a movable manner, so that the wheel 10 can vibrate up and down relative to the trolley when the trolley is moving, and cushioning is achieved through the elastic expansion and contraction of the shock absorber 13; at the same time, by adjusting the height position of the top of the shock absorber 13 on the back plate 10, the height position of the shock absorber 13, the wheel mounting seat 14 and the wheel 10 on the frame can be changed, thereby achieving the effect of changing the height of the trolley, and then realizing the adjustment of the center of gravity height of the trolley.

[0060] Example 2

[0061] This embodiment relates to a crash test trolley, which is provided with the suspension assembly provided in the first embodiment to achieve the installation of the wheel 10 on the frame; an exemplary structure of the crash test trolley is as follows Figure 4 and Figure 5 shown.

[0062] The crash test trolley of this embodiment comprises a front frame 3, a middle frame 2, and a rear frame 4, all connected front and rear. A suspension assembly from the first embodiment is mounted on each left and right side of the front frame 3 and rear frame 4 to mount four wheels 10. By adjusting the height of each wheel 10 on each of the four suspension assemblies, the center of mass of the entire crash test trolley can be varied.

[0063] By configuring the suspension assembly of the present invention on the vehicle frame, the position of the wheel 10 in the X-direction and Z-direction of the trolley can be adjusted, thereby changing the wheelbase and center of mass height of the trolley, so as to simulate vehicle models with different wheelbases or different center of mass heights for collision testing, thereby more comprehensively meeting research and development needs.

[0064] The specific adjustment range can be appropriately set based on the vehicle model being tested. For example, the vertical adjustment range of the shock absorber mount 12 on the back plate 11 can be set to ±50mm, with the upper push screw 171 used to limit the position to prevent the shock absorber 13 from moving up and down during vibration. Similarly, the vertical adjustment range of the wheel mount 14 on the back plate 11 can also be set to ±50mm, with the lower push screw 172 used to limit the position.

[0065] Of course, in addition to being used on collision test trolleys, the suspension assembly of the present invention can also be used on conventional vehicles; the tire size on the wheel 10, as well as the shock absorbing hardness, height size and other specifications of the shock absorber 13 can be changed and adjusted according to needs so that the suspension assembly can meet various differentiated needs.

[0066] The above description is merely a preferred embodiment of the present invention. The detailed configuration explanations, specific structural configuration examples, and assembly connection descriptions are provided for the purpose of providing sufficient disclosure to enable those skilled in the art to better implement the present invention. They are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A suspension assembly, characterized in that: It comprises a suspension body (1) and a wheel mounting frame arranged on the suspension body (1); The suspension body (1) comprises a back plate (11) for connecting to a vehicle frame, a wheel mounting seat (14) movably arranged on the back plate (11), and a shock absorber (13); The wheel mounting frame is mounted on the wheel mounting seat (14), the top height position of the shock absorber (13) is adjustable on the back plate (11), and the bottom of the shock absorber (13) is connected to the wheel mounting frame.

2. The suspension assembly according to claim 1, characterized in that: The back plate (11) is provided with a plurality of groups of mounting holes (110), and each group of the mounting holes (110) is arranged at intervals in the front-rear direction of the frame; the back plate (11) can be fixedly connected to the frame through any group of the mounting holes (110).

3. The suspension assembly according to claim 1, characterized in that: The back plate (11) is provided with a plurality of shock-absorbing seat fixing holes (112), each of the shock-absorbing seat fixing holes (112) is constructed as a long hole arranged up and down, the top of the shock absorber (13) is fixedly connected with the shock-absorbing seat (12), and the shock-absorbing seat (12) is fixed to the back plate (11) by a fastener passing through the shock-absorbing seat fixing hole (112).

4. The suspension assembly according to claim 3, characterized in that: The back plate (11) is provided with a height-adjustable limiting column, which is used to limit the height of the shock-absorbing seat (12) and / or the highest upward position of the wheel mounting seat (14).

5. The suspension assembly according to claim 1, characterized in that: The wheel mounting seat (14) is provided with a plurality of mounting plate connection holes (140), each of the mounting plate connection holes (140) being constructed as an elongated hole arranged vertically. The wheel mounting seat (14) is mounted on the back plate (11) via a fastener passing through the mounting plate connection hole (140) to allow the wheel mounting seat (14) to move up and down relative to the back plate (11).

6. The suspension assembly according to any one of claims 1 to 5, characterized in that: The wheel mounting frame comprises a swing arm mechanism hinged to the wheel mounting seat (14), and a wheel mounting plate (100) mounted on the swing arm mechanism for fixing the wheel (10); The shock absorber (13) is hinged to the top of the swing arm mechanism, and as the shock absorber (13) expands and contracts, the wheel (10) moves up and down relative to the wheel mounting seat (14).

7. The suspension assembly according to claim 6, characterized in that: The wheel mounting seats (14) are two arranged at intervals in an upper and lower manner, and the swing arm mechanism comprises an upper swing arm mechanism (15) and a lower swing arm mechanism (16) respectively arranged on the two wheel mounting seats (14); The shock absorber (13) is hinged on the upper swing arm mechanism (15), and the wheel mounting plate (100) is connected to both the upper swing arm mechanism (15) and the lower swing arm mechanism (16).

8. The suspension assembly according to claim 7, characterized in that: The upper swing arm mechanism (15) comprises an upper bracket (151) fixedly connected to the upper portion of the wheel mounting plate (100), and an upper swing arm (150) hinged between the upper bracket (151) and the wheel mounting seat (14) above, and the shock absorber (13) is hinged to the top of the upper bracket (151); The lower swing arm mechanism (16) comprises a lower bracket (161) fixedly connected to the lower portion of the wheel mounting plate (100), and a lower swing arm (160) hinged between the lower bracket (161) and the wheel mounting seat (14) below.

9. The suspension assembly according to claim 7, characterized in that: The hinged portion of the swing arm mechanism adopts a flexible connection to form a buffer when a force occurs between the two hinged parts.

10. A crash test trolley, characterized by: The collision test trolley is provided with the suspension assembly according to any one of claims 1 to 9.

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