Universal emptying frame for independent suspension of vehicle

Abstract

The utility model discloses a vehicle independent suspension universal discharging frame, and relates to the field of vehicle part production discharging frames, the vehicle independent suspension universal discharging frame comprises a bearing assembly, and the bearing assembly comprises a supporting bottom plate and a bearing frame body arranged on the supporting bottom plate; the fixing assembly comprises a plurality of first suspension placing rods arranged on the bearing frame body and arranged in the length direction of the bearing frame body, and a plurality of second suspension placing rods located between every two adjacent first suspension placing rods; the first suspension placing rods and the second suspension placing rods extend outwards, the length of the second suspension placing rods is smaller than that of the first suspension placing rods, suspension shaft body limiting units located between every two adjacent first suspension placing rods are further arranged at the top of the bearing frame body, and a plurality of placing neutral positions with different widths can be formed on the bearing frame body. And the placement requirements of independent suspension of vehicles of various specifications are met, various special storage racks do not need to be additionally purchased, and the purchase capital investment of enterprises is reduced.

Description

Technical Field

[0001] The utility model relates to the field of vehicle part production material racks, and particularly relates to a general material rack for vehicle independent suspensions. Background Art

[0002] The main function of an independent suspension system is to transmit the forces and torques acting between the wheels and the vehicle frame, and to buffer the impact force transmitted from the uneven road surface to the vehicle frame or body. At the same time, it attenuates the vibration caused thereby to ensure that the vehicle can drive smoothly. In addition, the independent suspension system can also absorb and mitigate the vibration and impact transmitted from the road surface, reduce the noise in the cab, increase the comfort of the occupants, and maintain the good operability and smooth driving performance of the vehicle. Through design, this system can provide sufficient safety under different road conditions to ensure that the operation is not out of control. Especially when the vehicle is accelerating, braking, steering and other movements under different road conditions, it can provide necessary reactions to ensure the safety of the vehicle driving. It is an important and indispensable part of vehicle components.

[0003] At present, with the diversification of vehicle types and forms, the specifications and forms of vehicle independent suspensions are increasing. In the production site, special storage racks are generally equipped for various specifications of vehicle independent suspensions, which also results in low versatility of the storage racks. Multiple storage racks are stacked beside the production line, causing chaos in the production site and increasing the purchase cost of the enterprise. Content of the Utility Model

[0004] This application provides a general material rack for vehicle independent suspensions, which can solve the technical problems existing in the prior art, such as low versatility of the special storage racks for vehicle suspensions, multiple storage racks stacked beside the production line, causing chaos in the production site, and increasing the purchase cost of the enterprise.

[0005] An embodiment of this application provides a general material rack for vehicle independent suspensions, including:

[0006] A bearing assembly, the bearing assembly includes a support bottom plate and a bearing frame body arranged on the support bottom plate;

[0007] A fixing assembly, the fixing assembly includes a plurality of first suspension placing rods arranged on the bearing frame body and arranged along the length direction of the bearing frame body, and several second suspension placing rods located between two adjacent first suspension placing rods. The first suspension placing rods and the second suspension placing rods both extend outwards, and the length of the second suspension placing rod is less than the length of the first suspension placing rod. A suspension shaft body limiting unit is also arranged on the top of the bearing frame body and located between two adjacent first suspension placing rods.

[0008] In one embodiment, the number of the fixing components is at least one group. When there are multiple groups of the fixing components, the carrier frames in the multiple groups of the fixing components are arranged close to each other, and a fixing connecting rod is arranged between two opposite carrier frames.

[0009] In one embodiment, the number of the first suspension placement rods is at least two.

[0010] In one embodiment, a diagonal support rod body is arranged at the bottom of the first suspension placement rod.

[0011] In one embodiment, the suspension shaft body limiting unit includes two spaced-apart shaft body limiting rods.

[0012] In one embodiment, a placement tray is further arranged on the top of the support bottom plate, and the placement tray is located below the first suspension placement rod.

[0013] In one embodiment, the bearing assembly further includes a lifting unit detachably arranged at the bottom of the support bottom plate.

[0014] In one embodiment, the lifting unit includes a lifting base and a sliding unit located at the bottom of the lifting base.

[0015] In one embodiment, a connecting unit is arranged between the support bottom plate and the lifting base.

[0016] In one embodiment, the connecting unit includes a first connecting plate located at the bottom of the support bottom plate and a second connecting plate located at the top of the lifting base.

[0017] The beneficial effects brought by the technical solutions provided by the embodiments of the present application include:

[0018] In the vehicle independent suspension universal feeding rack of the present application, by arranging a plurality of spaced-apart first suspension placement rods on the carrier frame and arranging a plurality of spaced-apart second suspension placement rods between two adjacent first suspension placement rods, a plurality of placement gaps with different widths can be formed on the carrier frame, meeting the placement requirements of various different specifications of vehicle independent suspensions, eliminating the need to purchase multiple additional special storage racks, reducing the enterprise's capital investment in purchasing, and also reducing the placement quantity of special shelves at the production site, improving the cleanliness of the production site. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic diagram of a general vehicle independent suspension loading rack structure provided by an embodiment of the present application;

[0021] Figure 2 Schematic diagram of a fixed component structure in a general vehicle independent suspension loading rack provided by an embodiment of the present application;

[0022] Figure 3 Schematic diagram of a lifting unit structure in a general vehicle independent suspension loading rack provided by an embodiment of the present application.

[0023] In the figure: 1, support bottom plate; 2, placement tray; 3, bearing frame body; 4, first suspension placement rod; 5, diagonal brace rod body; 6, suspension shaft body limiting unit; 601, shaft body limiting rod; 7, second suspension placement rod; 8, lifting unit; 801, lifting base; 802, sliding unit; 803, bearing plate; 804, support leg; 9, connection unit; 901, first connection plate; 902, second connection plate. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0025] The embodiment of the present application provides a general vehicle independent suspension loading rack, which can solve the technical problems existing in the prior art, such as low versatility of special storage racks for vehicle suspensions, multiple storage racks stacked beside the production line, causing chaos in the production site and increasing the enterprise's purchase cost.

[0026] The general independent suspension loading rack in the present application includes a bearing component and a fixed component. The bearing component is the main load-bearing member of the overall loading rack structure. Considering the self-weight of the vehicle suspension, the bearing component in the present application is preferably made of wear-resistant and high-rigidity metal material to improve the overall stability and load-bearing capacity of the structure. The fixed component is arranged on the bearing component and is mainly used to hang and fix various parts of the vehicle independent suspension from multiple angles. Moreover, there are various placement gaps with different widths in the fixed component, which can adapt to various specifications of vehicle independent suspensions. The overall structure has strong versatility, can meet the placement space requirements of various vehicle suspensions, and there is no need to purchase multiple special storage racks additionally. This can not only reduce the enterprise's investment in purchase funds, but also reduce the number of special storage racks placed at the production site and improve the cleanliness of the production site.

[0027] Specifically,Figure 1 Schematic diagram of a general material placing rack for independent suspensions of a vehicle provided by an embodiment of the present application, as Figure 1 shown, in the general material placing rack for independent suspensions in the present application, the bearing assembly includes a support bottom plate 1 and a bearing frame body 3 arranged on the support bottom plate 1. In an embodiment of the present application, the support bottom plate 1 is a horizontally arranged square plate body. The bottom of the bearing frame body 3 is fixedly connected to the top of the support bottom plate 1 and forms an integral body with the support bottom plate 1. The top of the bearing frame body 3 extends vertically upward for a certain height. In an embodiment, the bearing frame body 3 is located at the middle position of the support bottom plate 1 and the whole bearing frame body 3 is parallel to two of the side edges of the support bottom plate 1.

[0028] Furthermore, in the general material placing rack for independent suspensions in the present application, the fixing assembly includes a plurality of first suspension placing rods 4 arranged on the bearing frame body 3 along the length direction of the bearing frame body 3, and several second suspension placing rods 7 located between two adjacent first suspension placing rods 4. Both the first suspension placing rods 4 and the second suspension placing rods 7 extend outward, and the length of the second suspension placing rods 7 is less than the length of the first suspension placing rods 4. A suspension shaft body limiting unit 6 is also provided on the top of the bearing frame body 3 between two adjacent first suspension placing rods 4.

[0029] Combined with the above description, it can be known that the bearing frame body 3 has a certain length. In an embodiment of the present application, the bearing frame body 3 is of the same length as one of the side edges of the support bottom plate 1. A plurality of first suspension placing rods 4 are arranged at intervals along the length of the bearing frame body 3. At the same time, after assembly, a plurality of first suspension placing rods 4 are located on the same horizontal plane. Furthermore, the distance between a plurality of first suspension placing rods 4 can be equally spaced, or the distance between two adjacent first suspension placing rods 4 can be configured separately according to actual use requirements, and no specific limitation is made in the present application.

[0030] After assembly, one end of the first suspension placing rod 4 is fixedly connected to the bearing frame body 3 to form an integral body, and the other end of the first suspension placing rod 4 extends horizontally outward. It should be noted that the "outer side" in this article refers to the direction away from the central axis of the support bottom plate 1, and can also be understood as the direction towards the staff, which will not be repeated hereinafter. And the farthest extension length of the first suspension placing rod 4 does not exceed the bearing range of the support bottom plate 1. Commonly used independent suspensions of vehicles generally include a hub assembly and a shock absorber assembly longitudinally arranged on the top of the hub assembly. In the actual use process, the first suspension placing rod 4 is mainly used to place larger-sized independent suspensions of vehicles. After placement, the hub assembly in the independent suspension of the vehicle is located between two adjacent first suspension placing rods 4.

[0031] A plurality of second suspension placement rods 7 are arranged between every two adjacent first suspension placement rods 4. One end of each second suspension placement rod 7 is connected to the bearing frame 3, and the other end of each second suspension placement rod 7 extends horizontally outward. In an embodiment of the present application, two second suspension placement rods 7 are arranged between every two adjacent first suspension placement rods 4. Based on the structural arrangement, the distance between the two second suspension placement rods 7 is less than the distance between two adjacent first suspension placement rods 4, so as to place vehicle independent suspensions with smaller specifications. After placement, the wheel hub assembly in the vehicle independent suspension is located in the gap between two adjacent second suspension placement rods 7. At the same time, the length of the second suspension placement rod 7 is less than the length of the first suspension placement rod 4, so as to form an avoidance area to prevent the rod body of the second suspension placement rod 7 from affecting the placement space when placing large-specification vehicle independent suspensions. At the same time, the arrangement of the second suspension placement rod 7 can also hold the wheel hub assembly of the large-specification vehicle independent suspension to a certain extent, preventing the wheel hub assembly from directly contacting the bearing frame 3 and causing wear on the surface of the wheel hub assembly.

[0032] Further, the suspension shaft body limiting unit 6 is arranged between two adjacent first suspension placement rods 4. The suspension shaft body limiting unit 6 is mainly used to place the shock absorber assembly in the vehicle independent suspension. In the placed state, according to different sizes, the wheel hub assembly in the vehicle independent suspension is located between two adjacent first suspension placement rods 4 or between two adjacent second suspension placement rods 7, and the shock absorber assembly in the vehicle independent suspension is located at the suspension shaft body limiting unit 6. The combined action of the structure can stably fix the whole vehicle independent suspension from the top and bottom, preventing the vehicle independent suspension from falling during placement or transportation.

[0033] Further, the number of the fixing components is at least one group. When there are multiple groups of fixing components, the bearing frames 3 in multiple groups of fixing components are arranged close to each other, and a fixing link is arranged between two opposite bearing frames 3. Combining the above description, the support bottom plate 1 is a square plate. Therefore, as an optional embodiment, to ensure the uniform stress of the support bottom plate 1, the fixing components in the present application are preferably two groups or four groups. When there are two groups of fixing components, the bearing frames 3 in the two groups of fixing components are close to each other, and the two ends of the fixing link are respectively fixedly connected to the adjacent surfaces of the bearing frames 3 in the two groups of fixing components. When there are four groups of fixing components, the bearing frames 3 in the four groups of fixing components are connected end to end to form a rectangle. The first suspension placement rods 4 and the second suspension placement rods 7 in the four groups of fixing components are respectively arranged towards the four side edges of the support bottom plate 1. When there are four groups of fixing components, the number of the fixing links is two, and the two fixing links are vertically arranged.

[0034] Furthermore, the number of the first suspension placement rods 4 is at least two. From the above description, it can be known that two adjacent first suspension placement rods 4 are used to carry a vehicle independent suspension. Therefore, the number of the first suspension placement rods 4 in this application can be set according to actual usage requirements and is not specifically limited in this application. However, the number of the first suspension placement rods 4 is at least two to ensure the normal placement of the vehicle independent suspension.

[0035] Furthermore, Figure 2 FIG. is a schematic structural diagram of a fixing component in a general-purpose feeding rack for vehicle independent suspensions provided by an embodiment of the present application. As Figure 2 shown, a diagonal brace rod body 5 is provided at the bottom of the first suspension placement rod 4. The first suspension placement rod 4 is mainly used to carry a vehicle independent suspension with a relatively large specification. Correspondingly, when the specification is larger, the weight of the vehicle independent suspension will also increase. Therefore, the diagonal brace rod body 5 is mainly used to improve the bearing capacity of the first suspension placement rod 4 and prevent the first suspension placement rod 4 from breaking or collapsing due to the bearing capacity. The two ends of the diagonal brace rod body 5 are respectively fixedly connected to the side of the bearing frame body 3 facing the first suspension placement rod 4 and the end of the first suspension placement rod 4 away from the bearing frame body 3. The three together form a stable triangular support structure to ensure the normal load-bearing of the first suspension placement rod 4.

[0036] Generally speaking, the second suspension placement rod 7 is mainly used to carry a vehicle independent suspension with a relatively small specification. Correspondingly, when the specification is smaller, the weight of the vehicle independent suspension will also be lighter. Therefore, the second suspension placement rod 7 has no special bearing capacity requirement. However, according to actual usage conditions, a diagonal brace rod body 5 can also be added to the bottom of the second suspension placement rod 7, which is not specifically limited in this application.

[0037] Furthermore, the suspension shaft body limiting unit 6 includes two spaced-apart shaft body limiting rods 601. The bottom of the shaft body limiting rod 601 is fixedly connected to the top of the bearing frame body 3 and forms an integral body. The top of the shaft body limiting rod 601 extends vertically upward by a certain height. Two adjacent shaft body limiting rods 601 can be used to place the shock absorber assembly in the vehicle independent suspension to prevent the vehicle independent suspension from tilting or falling during placement or transportation.

[0038] Furthermore, see Figure 2, a placing tray 2 is further provided on the top of the supporting bottom plate 1. The placing tray 2 is located below the first suspension placing rod 4. The bottom of the placing tray 2 is connected to the top of the supporting bottom plate 1. Here, the placing tray 2 and the supporting bottom plate 1 can be fixedly connected to form an integral body, or a mechanical part can be used to achieve detachable connection to facilitate the later maintenance and replacement of the placing tray 2. The placing tray 2 is mainly used to place larger-sized vehicle independent suspensions. When the diameter of the hub assembly in the vehicle independent suspension is too large to be stably placed on the first suspension placing rod 4, the hub assembly can be directly placed on the placing tray 2, and the shock absorber assembly in the vehicle independent suspension is placed on the space between the two first suspension placing rods 4. Further, as an optional embodiment, an anti-wear layer is provided on the surface of the placing tray 2, which can protect the outer surface of the vehicle independent suspension hub assembly and prevent the paint on the surface of the hub assembly from being worn. In a possible implementation manner, the anti-wear layer can be a rubber layer.

[0039] Further, the bearing assembly further includes a lifting unit 8 detachably arranged at the bottom of the supporting bottom plate 1, as shown in Figure 1 , the lifting unit 8 is detachably arranged at the bottom of the supporting bottom plate 1 through a mechanical part, and can be installed or disassembled according to actual needs to facilitate adaptation to various working environments. Combining the above description, it can be known that the lifting unit 8 is located at the bottom of the entire structure. It is necessary to ensure its sufficient rigidity to meet the gravity bearing requirements of the vehicle independent suspension. Therefore, in this application, the lifting unit 8 is integrally made of wear-resistant high-strength metal.

[0040] Specifically, Figure 3 is a schematic structural diagram of the lifting unit 8 in a general-purpose placing rack for vehicle independent suspensions provided by an embodiment of this application. As shown in Figure 3 , the lifting unit 8 includes a lifting base 801 and a sliding unit 802 located at the bottom of the lifting base 801. The cross-section of the lifting base 801 is a rectangle equal in size to the supporting bottom plate 1, and the lifting base 801 itself has a certain height. In an implementation manner of this application, in order to reduce the overall self-weight of the structure and the manufacturing cost, the lifting base 801 includes a horizontally arranged bearing plate 803 and support legs 804 located at the bottoms of the four top corners of the bearing plate 803. Further, the bearing plate 803 can be a solid plate body or can be set in a hollow shape. The hollow bearing plate 803 includes a frame part and several reinforcing rods located inside the frame part. The two ends of the reinforcing rods are respectively connected to the inner walls of the frame part. The specific setting form is not specifically limited in this application, as long as the load-bearing capacity of the lifting base 801 can be ensured.

[0041] Further, the sliding unit 802 is disposed at the bottom of the elevation base 801, mainly for improving the moving flexibility of the independent suspension general loading rack in the present application, facilitating the transfer work of the overall loading rack and the vehicle independent suspension. As an alternative embodiment, the sliding unit 802 is four brake casters, and the four brake casters are respectively disposed at the bottom surfaces of the four top corners of the elevation base 801.

[0042] Further, a connecting unit 9 is provided between the support bottom plate 1 and the elevation base 801. The connecting unit 9 is mainly used for connecting and forming the support bottom plate 1 and the elevation base 801. Specifically, the connecting unit 9 includes a first connecting plate 901 located at the bottom of the support bottom plate 1 and a second connecting plate 902 located at the top of the elevation base 801. In a possible implementation manner, the support bottom plate 1 is a square plate body. The first connecting plate 901 is located at the bottom surfaces of the four top corners of the support bottom plate 1 and is spaced a certain distance from the bottom surface of the support bottom plate 1. First connecting screw holes are provided on the first connecting plate 901. Similarly, the second connecting plate 902 is located at the four top corners of the upper surface of the elevation base 801 and is opposite to the four first connecting plates 901 in position. Second threaded holes are opened at the same positions on the second connecting plate 902. Subsequently, bolts are used to pass through the first connecting screw holes and the second threaded holes to complete the fixation.

[0043] The usage method of the independent suspension general loading rack in the present application is as follows: First, select a suitable placement position according to the specifications of the vehicle independent suspension. For the convenience of description, here the vehicle independent suspension specifications are simply referred to as large suspension, medium suspension, and small suspension. The small suspension can be placed on two adjacent second suspension placement rods 7. The medium suspension can be placed on two adjacent first suspension placement rods 4. The large suspension is used to be placed on the placement tray 2. At the same time, regardless of the specifications of the vehicle independent suspension, its shock absorber assembly is placed between the two shaft body limiting rods 601 to fix the overall vehicle independent suspension from different directions and ensure the placement stability.

[0044] The universal placing rack for vehicle independent suspensions in this application forms multiple placing gaps with different widths on the bearing frame body 3 by arranging multiple first suspension placing rods 4 at intervals on the bearing frame body 3 and arranging multiple second suspension placing rods 7 at intervals between two adjacent first suspension placing rods 4. At the same time, through the placing trays 2 arranged at the bottoms of the first suspension placing rods 4 and the second suspension placing rods 7, it can meet the placing requirements of vehicle independent suspensions of various different specifications, eliminating the need to purchase multiple additional special storage racks, reducing the capital investment of the enterprise, and also reducing the number of special storage racks placed at the production site, improving the cleanliness of the production site. By setting the detachable elevation base 801, it is possible to choose to install or remove the elevation base 801 according to the height of the production site to facilitate adaptation to various working environments. Through the sliding unit 802 arranged at the bottom of the elevation base 801, the moving flexibility of the universal placing rack for independent suspensions in this application can be improved, facilitating the transfer work of the entire rack and the vehicle independent suspensions, improving work convenience, and the overall structure is simple and highly practical.

[0045] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0047] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A vehicle independent suspension universal material unloading rack, comprising: A bearing assembly, the bearing assembly comprising a supporting base plate (1) and a bearing frame body (3) arranged on the supporting base plate (1); A fixing assembly, the fixing assembly comprising a plurality of first suspension placement rods (4) arranged on the carrier body (3) and arranged along the length direction of the carrier body (3), and a plurality of second suspension placement rods (7) located between two adjacent first suspension placement rods (4), the first suspension placement rod (4) and the second suspension placement rod (7) both extending outwards and the length of the second suspension placement rod (7) being less than the length of the first suspension placement rod (4), and a suspension shaft limiting unit (6) located between two adjacent first suspension placement rods (4) is also provided at the top of the carrier body (3).

2. The vehicle independent suspension universal material unloading rack according to claim 1, characterized in that: The number of the fixing components is at least one group. When there are multiple groups of the fixing components, the support frames (3) in the multiple groups of the fixing components are arranged close to each other, and a fixing connecting rod is arranged between two opposite support frames (3).

3. The vehicle independent suspension universal material unloading rack according to claim 1, characterized in that: The number of the first suspension rods (4) is at least two.

4. The vehicle independent suspension universal material unloading rack as claimed in claim 3, characterized in that: A diagonal support rod body (5) is provided at the bottom of the first suspension placement rod (4).

5. The vehicle independent suspension universal material unloading rack according to claim 1, characterized in that: The suspension shaft limiting unit (6) comprises two shaft limiting rods (601) arranged at intervals.

6. The vehicle independent suspension universal material unloading rack according to claim 1, characterized in that: A placement tray (2) is also provided on the top of the supporting base plate (1), and the placement tray (2) is located below the first suspended placement rod (4).

7. The vehicle independent suspension universal material unloading rack according to claim 1, characterized in that: The bearing assembly further comprises a lifting unit (8) which is detachably arranged at the bottom of the supporting base plate (1).

8. The vehicle independent suspension universal material unloading rack as claimed in claim 7, characterized in that: The lifting unit (8) comprises a lifting base (801) and a sliding unit (802) located at the bottom of the lifting base (801).

9. The vehicle independent suspension universal material unloading rack according to claim 8, characterized in that: A connection unit is provided between the supporting base plate (1) and the raising base (801).

10. The vehicle independent suspension universal material unloading rack according to claim 9, characterized in that: The connection unit comprises a first connection plate (901) located at the bottom of the supporting base plate (1) and a second connection plate (902) located at the top of the raising base (801).

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