Adjustable rack

Abstract

The utility model discloses an adjustable rack, which comprises a movable chassis and at least one group of upright post mounting pieces, in the adjustable rack, the front-section chassis and the middle-section chassis are mounted through at least two groups of any adjacent chassis mounting holes, so that the mounting positions of the front-section chassis and the middle-section chassis can be adjusted according to mounting requirements, and similarly, the mounting positions of the middle-section chassis and the rear-section chassis can also be adjusted according to the mounting requirements; the installation positions of the stand column installation pieces, the base plates and the stand column installation pieces are not fixed but adjustable, and similarly, the installation positions of the stand column installation pieces relative to the base plates are not fixed but adjustable, so that the adjustable rack is not of an integrated structure but is of an adjustable structure. The overall length of the adjustable rack can be changed by adjusting the mounting position according to different vehicle types, so that the adjustable rack is adaptive to various vehicle types, the cost is greatly reduced, the assembly flexibility is also improved, and the camera is mounted through the upright post mounting part, so that the damage to the vehicle body structure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of bench equipment, in particular to an adjustable bench. Background Art

[0002] At present, with the increase in the number of cars in our country, traffic accidents also occur frequently.

[0003] In order to reduce the accident rate, the research on the panoramic view system is becoming more common and in-depth. At present, the research on the panoramic view system needs to be based on the experimental vehicle, and the camera needs to be installed on the experimental vehicle during the experiment, which will damage the body structure of the experimental vehicle, increase the experimental cost and impose strict restrictions on the model of the experimental vehicle.

[0004] Therefore, when conducting experiments, it is necessary to use a bench device to install the camera so as not to damage the vehicle structure. The existing bench device is an integrated structure that can only be adapted to specific vehicle models. In addition, the integrated structure is overall heavy, which makes it inconvenient to operate. Furthermore, if multiple vehicle models are to be studied, each vehicle model requires a corresponding bench device, which results in high costs. Utility Model Content

[0005] The utility model provides an adjustable stand to reduce costs. The specific technical solution is as follows:

[0006] In a first aspect, the utility model provides an adjustable stand, comprising a movable chassis and at least one set of column mounting parts, wherein the at least one set of column mounting parts comprises a mounting column and a camera connecting part, wherein the mounting column comprises a column and a plane bracket vertically connected to each other, wherein the plane bracket is provided with two rows of column mounting holes;

[0007] The movable chassis includes a front chassis, a middle chassis and a rear chassis;

[0008] The front end of the front chassis is provided with two rows of column mounting holes, the rear end of the front chassis is provided with two rows of chassis mounting holes, the front end and the rear end of the middle chassis are each provided with two rows of chassis mounting holes, the left side and the right side of the middle chassis are each provided with two rows of column mounting holes, the front end of the rear chassis is provided with two rows of chassis mounting holes, and the rear end of the rear chassis is provided with two rows of column mounting holes;

[0009] Each column mounting hole row and each column chassis mounting hole row are composed of at least four through holes distributed at equal intervals, two through holes at corresponding positions in two columns chassis mounting holes form a group of chassis mounting holes, and two through holes at corresponding positions in two columns column mounting holes form a group of column mounting holes;

[0010] Any at least two groups of chassis mounting holes at the rear end of the front chassis are fixedly connected to any at least two groups of chassis mounting holes at the front end of the middle chassis by means of a locking device, and any at least two groups of chassis mounting holes at the rear end of the middle chassis are fixedly connected to any at least two groups of chassis mounting holes at the front end of the rear chassis by means of a locking device;

[0011] For each set of column mounting parts, any adjacent at least two sets of column mounting holes of the plane bracket of the column mounting parts are fixedly connected to any adjacent at least two sets of column mounting holes of one of the front chassis, the middle chassis and the rear chassis through a locking device, and the camera connecting member of the column mounting parts is fixedly connected to the upper end of the column of the group.

[0012] Optionally, the adjustable stand includes four sets of column mounting members;

[0013] One of the four mounting columns is fixedly connected to any adjacent at least two groups of column mounting holes of the front chassis through any adjacent at least two groups of column mounting holes of its own plane bracket by a locking device, and another of the four mounting columns is fixedly connected to any adjacent at least two groups of column mounting holes of the rear chassis through any adjacent at least two groups of column mounting holes of its own plane bracket by a locking device;

[0014] The remaining two mounting columns of the four mounting columns are arranged opposite to each other on the left and right, and one of the remaining two mounting columns is fixedly connected to any adjacent at least two groups of column mounting holes set on the left side of the middle chassis through any adjacent at least two groups of column mounting holes of its own plane bracket by a locking device, and the other of the remaining two mounting columns is fixedly connected to any adjacent at least two groups of column mounting holes set on the right side of the middle chassis through any adjacent at least two groups of column mounting holes of its own plane bracket by a locking device.

[0015] Optionally, the front section chassis includes a first rectangular frame, at least one first support rod, two first mounting hole cross bars and a first cross bar mounting rod;

[0016] Each first support rod and the first crossbar mounting rod are fixedly connected to the inside of the first rectangular frame and are respectively parallel to any side of the first rectangular frame;

[0017] The two first mounting hole cross bars are arranged in parallel, and one end of each first mounting hole cross bar is fixedly connected to the same side of the first rectangular frame, and the other end is fixedly connected to the first cross bar mounting rod;

[0018] Each first mounting hole cross bar is provided with a row of column mounting holes, and the first rectangular frame is parallel to each first mounting hole cross bar and is provided with a row of chassis mounting holes at the ends of two sides away from the two first mounting hole cross bars.

[0019] Optionally, the middle chassis includes a second rectangular frame and two T-shaped brackets and a second support rod arranged in the second rectangular frame, wherein each T-shaped bracket includes a second mounting hole cross bar and a non-mounting hole cross bar perpendicular to each other;

[0020] The second support rod is parallel to the first side of the second rectangular frame, the two T-shaped brackets are symmetrically arranged on both sides of the second support rod, and the second mounting hole cross bar of each T-shaped bracket is parallel to the first side, and the non-mounting hole cross bar of each T-shaped bracket is fixedly connected to the corresponding second side, wherein the first side is any side of the second rectangular frame, and the second side is a side of the second rectangular frame that is perpendicular to the first side;

[0021] A row of column mounting holes is respectively arranged on the left and right sides of each second mounting hole crossbar, and a row of chassis mounting holes is arranged at both ends of each second side of the second rectangular frame.

[0022] Optionally, the rear section chassis includes a third rectangular frame, at least one third support rod, two third mounting hole cross bars and a second cross bar mounting rod;

[0023] Each third support rod and the second crossbar mounting rod are fixedly connected to the inside of the third rectangular frame, and are respectively parallel to any side of the third rectangular frame;

[0024] The two third mounting hole cross bars are arranged in parallel, and one end of each third mounting hole cross bar is fixedly connected to the same side of the third rectangular frame, and the other end is fixedly connected to the second cross bar mounting rod;

[0025] Each third mounting hole cross bar is provided with a row of column mounting holes, and the third rectangular frame is parallel to each third mounting hole cross bar and is provided with a row of chassis mounting holes at the ends of two sides away from the two third mounting hole cross bars.

[0026] Optionally, the camera connecting member in each set of column mounting members includes a camera fixing cross bar and a cross bar connecting member;

[0027] For each group of column mounting parts, the camera fixing cross bar of the group is fixedly mounted on the cross bar connecting part of the group, and the cross bar connecting part of the group is fixedly mounted on the upper end of the column of the group.

[0028] Optionally, each set of mounting posts also includes two post support rods;

[0029] For each group of installation columns, one end of each column support rod of the group is fixedly connected to the middle part of the column of the group, and the other end is fixedly connected to one end of the planar bracket of the group. The two column support rods of the group are located in the same plane as the columns of the group, and the two column support rods of the group form a triangular structure with the planar bracket of the group.

[0030] Optionally, each group of column mounting members further includes a first U-shaped bolt group and a second U-shaped bolt group, and each group of crossbar connecting members is a flat steel plate, and the flat steel plate is provided with a first group of circular through holes arranged vertically and a second group of circular through holes arranged horizontally;

[0031] For each set of column mounting parts, the camera fixing cross bar of the group is fixedly mounted on the upper end of the column of the group through the first U-shaped bolt group of the group, the first group of circular through holes of the group, the second U-shaped bolt group of the group and the second group of circular through holes of the group.

[0032] Optionally, each group of circular through holes includes two pairs of circular through holes arranged opposite to each other, the two circular through holes of each pair of circular through holes are located in the same straight line, and each group of U-shaped bolt groups includes two pairs of U-shaped bolts and nut assemblies.

[0033] Optionally, the adjustable stand further comprises at least six pairs of movable caster assemblies, wherein the total number of the movable caster assemblies is an even number;

[0034] At least two pairs of movable caster assemblies are fixedly installed on the lower side of each chassis, and each pair of movable caster assemblies are arranged opposite to each other.

[0035] From the above content, it can be known that the adjustable stand provided by the embodiment of the utility model includes a movable chassis and at least one group of column mounting parts, at least one group of column mounting parts includes mounting columns and camera connecting parts, the mounting columns include columns and plane brackets vertically connected to each other, the plane bracket is provided with two rows of column mounting holes, and the movable chassis includes a front chassis, a middle chassis and a rear chassis; the front end of the front chassis is provided with two rows of column mounting holes, the rear end of the front chassis is provided with two rows of chassis mounting holes, the front end and the rear end of the middle chassis are each provided with two rows of chassis mounting holes, the left side and the right side of the middle chassis are each provided with two rows of column mounting holes, the front end of the rear chassis is provided with two rows of chassis mounting holes, and the rear end of the rear chassis is provided with two rows of column mounting holes; wherein, each row of column mounting holes and each row of chassis mounting holes are composed of at least four through holes distributed at equal intervals, and the two rows of bottom The two through holes at corresponding positions in the plate mounting holes form a group of chassis mounting holes, and the two through holes at corresponding positions in the two rows of column mounting holes form a group of column mounting holes; any adjacent at least two groups of chassis mounting holes at the rear end of the front chassis and any adjacent at least two groups of chassis mounting holes at the front end of the middle chassis are fixedly connected by a locking device, and any adjacent at least two groups of chassis mounting holes at the rear end of the middle chassis and any adjacent at least two groups of chassis mounting holes at the front end of the rear chassis are fixedly connected by a locking device; for each group of column mounting parts, any adjacent at least two groups of column mounting holes of the planar bracket of the group of column mounting parts are fixedly connected to any adjacent at least two groups of column mounting holes of one of the front chassis, the middle chassis and the rear chassis through a locking device, and the camera connecting part of the group of column mounting parts is fixedly connected to the upper end of the column of the group. Since the front chassis and the middle chassis are installed through at least two groups of chassis mounting holes that are adjacent to each other, the front chassis and the middle chassis can adjust the installation position according to the installation requirements and then be fixedly connected by a locking device. Similarly, since the middle chassis and the rear chassis are also installed through at least two groups of chassis mounting holes that are adjacent to each other, the middle chassis and the rear chassis can adjust the installation position according to the installation requirements and then be fixedly connected by a locking device. It can be seen that the installation positions of the three are not fixed, but adjustable. Similarly, the installation positions of each column mounting piece relative to each chassis are not fixed, but can be adjusted. It can be seen that the adjustable stand provided in the embodiment of the utility model is not an integrated structure, but an adjustable structure. The installation position can be adjusted according to different vehicle models to change the overall length of the adjustable stand, thereby adapting to various vehicle models, greatly reducing costs, and improving assembly flexibility. In addition, the camera is installed through the column mounting piece to avoid damage to the vehicle body structure.

[0036] The innovative features of the present utility model embodiment include:

[0037] 1. Since the front chassis and the middle chassis are installed through at least two groups of chassis mounting holes that are adjacent to each other, the front chassis and the middle chassis can adjust the installation position according to the installation requirements and then be fixedly connected by a locking device. Similarly, since the middle chassis and the rear chassis are also installed through at least two groups of chassis mounting holes that are adjacent to each other, the middle chassis and the rear chassis can adjust the installation position according to the installation requirements and then be fixedly connected by a locking device. It can be seen that the installation positions of the three are not fixed, but adjustable. Similarly, the installation positions of each column mounting piece relative to each chassis are not fixed, but can be adjusted. It can be seen that the adjustable stand provided in the embodiment of the utility model is not an integrated structure, but an adjustable structure. The installation position can be adjusted according to different vehicle models to change the overall length of the adjustable stand, thereby adapting to various vehicle models, greatly reducing costs, and improving assembly flexibility. In addition, the camera is installed through the column mounting piece to avoid damage to the vehicle body structure.

[0038] 2. When the structure adopted by the adjustable stand provided in the embodiment of the utility model is a square tube welding structure, the overall weight is light, easy to operate, and the operational convenience is improved.

[0039] 3. Independent column mounting parts can not only select the installation quantity according to needs, but also quickly adjust the position according to the model size of the experimental vehicle.

[0040] 4. The front chassis plays a supporting role by setting a first rectangular frame and at least one first support rod. The connection with the column mounting parts can be achieved by setting two first mounting hole cross bars, first cross bar mounting rods and setting a row of column mounting holes in each first mounting hole cross bar. The connection with the middle chassis can be achieved by setting a row of chassis mounting holes at the ends of two sides of the first rectangular frame parallel to each first mounting hole cross bar and away from the two first mounting hole cross bars.

[0041] 5. The middle chassis plays a supporting role by setting up a second rectangular frame and a second support rod. The connection with the column mounting parts can be achieved by setting up two T-shaped brackets and setting up a row of column mounting holes on the left and right sides of each second mounting hole cross bar. The connection with the rear chassis can be achieved by setting up a row of chassis mounting holes at both ends of each second side of the second rectangular frame.

[0042] 6. The rear chassis plays a supporting role by providing a third rectangular frame and at least one third support rod. The connection with the column mounting parts can be achieved by providing two third mounting hole cross bars, a second cross bar mounting rod and a row of column mounting holes in each third mounting hole cross bar. The connection with the middle chassis can be achieved by providing a row of chassis mounting holes at the ends of two sides of the third rectangular frame parallel to each third mounting hole cross bar and away from the two third mounting hole cross bars.

[0043] 7. The two column support rods are arranged in the same plane as the column, and the two column support rods and the plane bracket form a triangular structure to support the column.

[0044] 8. Fix the camera fixing cross bar to the upper end of the column by matching the U-bolt group with the circular through hole.

[0045] 9. Fix the camera by setting a circular through hole on the camera fixing cross bar, and adjust the camera installation position by setting a square tube with a long through hole on the camera fixing cross bar.

[0046] 10. The movement of the chassis is achieved by fixing at least two pairs of movable caster assemblies on the lower side of each chassis.

[0047] 11. By arranging a support frame on the lower side of the middle chassis, the front chassis, the middle chassis and the rear chassis are installed on the same plane, thereby ensuring the stability of the adjustable stand.

[0048] Of course, implementing any product or method of the present invention does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0050] Figure 1 A schematic diagram of the structure of an adjustable stand provided in an embodiment of the utility model;

[0051] Figure 2 A schematic diagram of the structure of the front chassis provided by an embodiment of the utility model;

[0052] Figure 3 A schematic diagram of the structure of a middle chassis provided by an embodiment of the utility model;

[0053] Figure 4 A schematic diagram of the structure of the rear chassis provided by an embodiment of the utility model;

[0054] Figure 5 A schematic diagram of the structure of a column mounting member provided in an embodiment of the utility model;

[0055] Figure 6 A schematic diagram of the structure of a crossbar connecting member provided in an embodiment of the utility model;

[0056] Figure 7 A schematic structural diagram of a camera fixing cross bar provided in an embodiment of the utility model.

[0057] Figure 1-Figure 7 , 1 column mounting part, 11 mounting column, 111 column, 112 plane bracket, 113 column support rod, 12 camera connecting part, 121 camera fixing cross bar, 1211 first through hole, 1212 long strip through hole, 122 cross bar connecting part, 1221 first group of circular through holes, 1222 second group of circular through holes, 13 first U-shaped bolt group, 14 second U-shaped bolt group, 2 front chassis, 21 first rectangular frame, 22 first support rod, 23 first mounting hole cross bar, 24 first cross bar mounting rod, 3 middle chassis, 31 second rectangular frame, 32 T-shaped bracket, 321 second mounting hole cross bar, 322 non-mounting hole cross bar, 33 second support rod, 4 rear chassis, 41 third rectangular frame, 42 third support rod, 43 third mounting hole cross bar, 44 second cross bar mounting rod, 5 column mounting hole, 6 chassis mounting hole, 7 movable caster assembly. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present utility model and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0060] The utility model embodiment discloses an adjustable stand, which can be adapted to various vehicle models, reduces costs, and is easy to operate. The utility model embodiment is described in detail below.

[0061] Figure 1 A schematic diagram of the structure of an adjustable stand provided in an embodiment of the utility model. Figure 1 The adjustable stand provided by the embodiment of the utility model includes a movable chassis and at least one group of column mounting parts 1, at least one group of column mounting parts 1 includes a mounting column 11 and a camera connecting part 12, the mounting column 11 includes a column 111 and a plane bracket 112 vertically connected to each other, wherein the function of the plane bracket 112 is to serve as the base of the column 111 to ensure the stability of the overall structure of the mounting column 11.

[0062] Both the column 111 and the plane bracket 112 are structures with a certain rigidity. Exemplarily, both the column 111 and the plane bracket 112 are square tube welded structures, and the connection method between the two can be welding.

[0063] Continue to see Figure 1 The movable chassis includes a front chassis 2, a middle chassis 3 and a rear chassis 4, wherein the front chassis 2, the middle chassis 3 and the rear chassis 4 are all structures with a certain rigidity. Exemplarily, the front chassis 2, the middle chassis 3 and the rear chassis 4 are all flat plate structures welded by square tubes.

[0064] Two rows of column mounting holes 5 are provided at the front end of the front chassis 2, two rows of chassis mounting holes 6 are provided at the rear end of the front chassis 2, two rows of chassis mounting holes 6 are respectively provided at the front end and the rear end of the middle chassis 3, two rows of column mounting holes 5 are respectively provided on the left side and the right side of the middle chassis 3, two rows of chassis mounting holes 6 are provided at the front end of the rear chassis 4, and two rows of column mounting holes 5 are provided at the rear end of the rear chassis 4.

[0065] Among them, the column mounting hole 5 is used to install the column mounting part 1, and the chassis mounting hole 6 is used to install the chassis. Each column mounting hole 5 and each column chassis mounting hole 6 are composed of at least four through holes distributed at equal intervals. Exemplarily, the spacing between each through hole can be 100 mm, and the two through holes at corresponding positions in the two columns of chassis mounting holes 6 form a group of chassis mounting holes, and the two through holes at corresponding positions in the two columns of column mounting holes 5 form a group of column mounting holes.

[0066] Continue to see Figure 1 Any adjacent at least two groups of chassis mounting holes 6 at the rear end of the front chassis 2 are fixedly connected with any adjacent at least two groups of chassis mounting holes 6 at the front end of the middle chassis 3 through a locking device, and any adjacent at least two groups of chassis mounting holes 6 at the rear end of the middle chassis 3 are fixedly connected with any adjacent at least two groups of chassis mounting holes 6 at the front end of the rear chassis 4 through a locking device.

[0067] The locking device may be a threaded fastener, and the threaded fastener may be a screw nut, or a bolt nut. Any two adjacent groups means any two adjacent groups, any three adjacent groups, or any four adjacent groups, etc. Generally speaking, when installing between each two parts, installing through at least two groups of chassis mounting holes can ensure higher stability.

[0068] During specific installation, it can be staggered installation, for example: the two rows of chassis mounting holes 6 at the rear end of the front chassis 2 are respectively composed of four through holes A1, B1, C1 and D1 arranged in a row from front to back and four through holes A2, B2, C2 and D2 arranged in a row from front to back, then the two through holes at corresponding positions in the two rows of chassis mounting holes 6 form a group of chassis mounting holes, forming a total of 4 groups of chassis mounting holes: (A1, A2), (B1, B2), (C1, C2), (D1, D2);

[0069] The two rows of chassis mounting holes 6 at the front end of the middle chassis 3 are respectively composed of four through holes E1, F1, G1, and H1 arranged in a row from front to back, and four through holes E2, F2, G2, and H2 arranged in a row from front to back, forming a total of 4 groups of chassis mounting holes: (E1, E2), (F1, F2), (G1, G2), and (H1, H2);

[0070] If the connection is made through any two adjacent sets of chassis mounting holes, it can be (C1, C2) connected to (E1, E2) and (D1, D2) connected to (F1, F2), or (C1, C2) connected to (G1, G2) and (D1, D2) connected to (H1, H2), and the examples are not exhaustive here;

[0071] If the connection is made through any three adjacent sets of chassis mounting holes, it can be (B1, B2) connected to (E1, E2), (C1, C2) connected to (F1, F2), (D1, D2) connected to (G1, G2), (B1, B2) connected to (F1, F2), (C1, C2) connected to (G1, G2), (D1, D2) connected to (H1, H2), etc. The examples are not exhaustive here.

[0072] If the connection is made through any four adjacent groups of chassis mounting holes, it can be (A1, A2) connected with (E1, E2), (B1, B2) connected with (F1, F2), (C1, C2) connected with (G1, G2), (D1, D2) connected with (H1, H2), and the installation is carried out according to the specific installation requirements.

[0073] When adjusting the installation position, it is achieved by moving each component and installing it through different installation holes of each component. For example, if you want to shorten the length direction of the adjustable stand, you can move the front chassis 2 backward so that the chassis mounting hole 6 at the rear end of the front chassis 2 can be fixedly installed with the chassis mounting hole 6 at the front end of the middle chassis 3 which is further back.

[0074] The front, rear, left and right directions in the embodiment of the present invention are the same as the front, rear, left and right directions of the vehicle.

[0075] That is to say, since the front chassis 2 and the middle chassis 3 are installed through at least two adjacent groups of chassis mounting holes, the installation positions of the front chassis 2 and the middle chassis 3 can be adjusted according to installation requirements, and then fixedly connected by a locking device. Similarly, since the middle chassis 3 and the rear chassis 4 are also installed through at least two adjacent groups of chassis mounting holes, the installation positions of the middle chassis 3 and the rear chassis 4 can be adjusted according to installation requirements, and then fixedly connected by a locking device. It can be seen that the installation positions of the three are not fixed, but adjustable.

[0076] Continue to see Figure 1 The plane bracket 112 is provided with two rows of column mounting holes 5. For each group of column mounting parts 1, any adjacent at least two groups of column mounting holes 5 of the plane bracket 112 of the group of column mounting parts 1 are fixedly connected to any adjacent at least two groups of column mounting holes 5 of one of the front chassis 2, the middle chassis 3 and the rear chassis 4 through a locking device, and the camera connecting part 12 of the group of column mounting parts 1 is fixedly connected to the upper end of the column 111 of the group.

[0077] The installation method is similar to that of the chassis mounting holes, that is, since the planar bracket 112 and one of the front chassis 2, the middle chassis 3 and the rear chassis 4 are installed through any adjacent at least two groups of column mounting holes 5, each column mounting member 1 can adjust the installation position according to the installation requirements, and then be fixedly connected by a locking device. It can be seen that the installation position of each column mounting member 1 relative to each chassis is not fixed, but adjustable.

[0078] In summary, the adjustable stand provided in the embodiment of the utility model comprises a movable chassis and at least one group of column mounting parts, at least one group of column mounting parts comprises mounting columns and camera connecting parts, the mounting columns comprise columns and plane brackets vertically connected to each other, the plane bracket is provided with two rows of column mounting holes, and the movable chassis comprises a front chassis, a middle chassis and a rear chassis; the front end of the front chassis is provided with two rows of column mounting holes, the rear end of the front chassis is provided with two rows of chassis mounting holes, the front end and the rear end of the middle chassis are each provided with two rows of chassis mounting holes, the left side and the right side of the middle chassis are each provided with two rows of column mounting holes, the front end of the rear chassis is provided with two rows of chassis mounting holes, and the rear end of the rear chassis is provided with two rows of column mounting holes; wherein, each row of column mounting holes and each row of chassis mounting holes are composed of at least four through holes distributed at equal intervals, and the two rows of chassis The two through holes at corresponding positions in the mounting holes form a group of chassis mounting holes, and the two through holes at corresponding positions in the two rows of column mounting holes form a group of column mounting holes; any adjacent at least two groups of chassis mounting holes at the rear end of the front chassis and any adjacent at least two groups of chassis mounting holes at the front end of the middle chassis are fixedly connected by a locking device, and any adjacent at least two groups of chassis mounting holes at the rear end of the middle chassis and any adjacent at least two groups of chassis mounting holes at the front end of the rear chassis are fixedly connected by a locking device; for each group of column mounting parts, any adjacent at least two groups of column mounting holes of the planar bracket of the group of column mounting parts are fixedly connected to any adjacent at least two groups of column mounting holes of one of the front chassis, the middle chassis and the rear chassis through a locking device, and the camera connector of the group of column mounting parts is fixedly connected to the upper end of the column of the group. Since the front chassis 2 and the middle chassis 3 are installed through at least two groups of chassis mounting holes that are adjacent to each other, the front chassis 2 and the middle chassis 3 can adjust the installation position according to the installation requirements and then be fixedly connected by a locking device. Similarly, since the middle chassis 3 and the rear chassis 4 are also installed through at least two groups of chassis mounting holes that are adjacent to each other, the middle chassis 3 and the rear chassis 4 can adjust the installation position according to the installation requirements and then be fixedly connected by a locking device. It can be seen that the installation positions of the three are not fixed, but adjustable. Similarly, the installation positions of each column mounting member 1 relative to each chassis are not fixed, but can be adjusted. It can be seen that the adjustable stand provided in the embodiment of the utility model is not an integrated structure, but an adjustable structure. The installation position can be adjusted according to different vehicle models to change the overall length of the adjustable stand, thereby adapting to various vehicle models, greatly reducing costs, and improving assembly flexibility. In addition, the camera is installed through the column mounting member to avoid damage to the vehicle body structure.

[0079] At the same time, when the structure adopted by the adjustable stand provided in the embodiment of the utility model is a square tube welding structure, the overall weight is light, easy to operate, and the operational convenience is improved.

[0080] Furthermore, the independent column mounting parts 1 can not only be installed in selected quantities according to needs but also be quickly adjusted in position according to the size of the experimental vehicle.

[0081] Continue to see Figure 1 The adjustable stand includes four groups of column mounting parts 1, one of the four mounting columns 1 is fixedly connected to any adjacent at least two groups of column mounting holes 5 of the front chassis 2 through any adjacent at least two groups of column mounting holes 5 of its own plane bracket 112 through a locking device, and another mounting column 1 among the four mounting columns 1 is fixedly connected to any adjacent at least two groups of column mounting holes 5 of the rear chassis 4 through any adjacent at least two groups of column mounting holes 5 of its own plane bracket 112 through a locking device.

[0082] The remaining two mounting columns 1 of the four mounting columns 1 are arranged opposite to each other on the left and one of the remaining two mounting columns 1 is fixedly connected to any adjacent at least two groups of column mounting holes 5 set on the left side of the middle chassis 3 through any adjacent at least two groups of column mounting holes 5 of its own plane bracket 112 by a locking device, and the other of the remaining two mounting columns 1 is fixedly connected to any adjacent at least two groups of column mounting holes set on the right side of the middle chassis 3 through any adjacent at least two groups of column mounting holes 5 of its own plane bracket 112 by a locking device. The specific installation method of the column mounting holes refers to the relevant introduction of the chassis mounting holes above, which will not be repeated here.

[0083] The following is a detailed introduction to the various components of the adjustable stand:

[0084] Figure 2 A schematic diagram of the structure of the front chassis provided by the embodiment of the utility model. Figure 2 The front chassis 2 includes a first rectangular frame 21, at least one first support rod 22, two first mounting hole cross rods 23 and a first cross rod mounting rod 24. The first support rod 22 plays a supporting role.

[0085] Each first support rod 22 and first cross bar mounting rod 24 is fixedly connected to the inside of the first rectangular frame 21 and is parallel to any side of the first rectangular frame 21, that is, the first support rod 22 and the first cross bar mounting rod 24 can be parallel or perpendicular.

[0086] For example, Figure 2As shown, the number of the first support rods 22 is 5, among which 4 first support rods 22 form a cross-shaped support rod, the remaining first support rod 22 and one side of the cross-shaped support rod are located on the same straight line, and one end is fixedly connected to the first cross bar mounting rod 24, and the other end is fixedly connected to one side of the corresponding first rectangular frame 21, and the two ends of the other side of the cross-shaped support rod are respectively fixedly connected to one side of the corresponding first rectangular frame 21.

[0087] The two first mounting hole cross bars 23 are arranged in parallel, and one end of each first mounting hole cross bar 23 is fixedly connected to the same side of the first rectangular frame 21, and the other end is fixedly connected to the first cross bar mounting rod 24, wherein the fixed connection method can be welding.

[0088] In one implementation, one of the first support rods 22 is arranged parallel to the two first mounting hole cross bars 23, and one end is also fixedly connected to the same side of the first rectangular frame 21 as the first mounting hole cross bar 23 when installed, and the other end is fixedly connected to the first cross bar mounting rod 24. The two first mounting hole cross bars 23 are arranged on both sides of the first support rod 22 and are symmetrically arranged about the first support rod 22.

[0089] Each first mounting hole cross bar 23 is provided with a row of column mounting holes 5 , and the first rectangular frame 21 is parallel to each first mounting hole cross bar 23 and is provided with a row of chassis mounting holes 6 at the ends of two sides away from the two first mounting hole cross bars 23 .

[0090] Therefore, the front chassis 2 plays a supporting role by setting a first rectangular frame 21 and at least one first support rod 22. The connection with the column mounting part 1 can be achieved by setting two first mounting hole cross bars 23, a first cross bar mounting rod 24 and a row of column mounting holes 5 on each first mounting hole cross bar 23. The connection with the middle chassis 3 can be achieved by setting a row of chassis mounting holes 6 at the ends of the two sides of the first rectangular frame 21 parallel to each first mounting hole cross bar 23 and away from the two first mounting hole cross bars 23.

[0091] Figure 3 A schematic diagram of the structure of the middle chassis provided by the embodiment of the utility model. Figure 3 The middle chassis 3 includes a second rectangular frame 31 and two T-shaped brackets 32 and a second support rod 33 arranged in the second rectangular frame 31, wherein each T-shaped bracket 32 ​​includes a second mounting hole cross bar 321 and a non-mounting hole cross bar 322 which are perpendicular to each other, wherein the second support rod 33 plays a supporting role.

[0092] The second support rod 33 is parallel to the first side of the second rectangular frame 31, and the two T-shaped brackets 32 are symmetrically arranged on both sides of the second support rod 33, and the second mounting hole cross bar 321 of each T-shaped bracket 32 ​​is parallel to the first side, and the non-mounting hole cross bar 322 of each T-shaped bracket 32 ​​is fixedly connected to the corresponding second side, wherein the first side is any side of the second rectangular frame 31, and the second side is a side of the second rectangular frame 31 that is perpendicular to the first side, wherein the fixed connection method can be welding.

[0093] Each second mounting hole cross bar 321 is provided with a row of column mounting holes 5 on the left and right sides respectively. The two rows of column mounting holes 5 can be arranged in a row as shown in FIG. Figure 3 As shown, they may not be arranged in a row. A row of chassis mounting holes 6 are provided at both ends of each second side of the second rectangular frame 31 .

[0094] Therefore, the middle chassis 3 plays a supporting role by setting up a second rectangular frame 31 and a second support rod 33. By setting up two T-shaped brackets 32 and setting a row of column mounting holes 5 on the left and right sides of each second mounting hole cross bar 321, connection with the column mounting part 1 can be achieved. By setting a row of chassis mounting holes 6 at both ends of each second side of the second rectangular frame 31, connection with the rear chassis 4 can be achieved.

[0095] Figure 4 A schematic diagram of the structure of the rear chassis provided by the embodiment of the utility model. Figure 4 The rear chassis 4 includes a third rectangular frame 41, at least one third support rod 42, two third mounting hole cross rods 43 and a second cross rod mounting rod 44. Among them, the third support rod 42 plays a supporting role.

[0096] Each third support rod 42 and second cross bar mounting rod 44 is fixedly connected to the inside of the third rectangular frame 41 and is parallel to any side of the third rectangular frame 41, that is, the third support rod 42 and second cross bar mounting rod 44 can be parallel or perpendicular.

[0097] For example, Figure 4 As shown, the number of third support rods 42 is 5, among which 4 third support rods 42 form a cross-shaped support rod, and the remaining third support rod 42 and one side of the cross-shaped support rod are located on the same straight line, and one end is fixedly connected to the second cross bar mounting rod 44, and the other end is fixedly connected to one side of the corresponding third rectangular frame 41, and the two ends of the other side of the cross-shaped support rod are respectively fixedly connected to one side of the corresponding third rectangular frame 41.

[0098] The two third mounting hole cross bars 43 are arranged in parallel, and one end of each third mounting hole cross bar 43 is fixedly connected to the same side of the third rectangular frame 41, and the other end is fixedly connected to the second cross bar mounting rod 44, wherein the fixed connection method can be welding.

[0099] Among them, in one implementation, one of the third support rods 42 is arranged in parallel with the two third mounting hole cross bars 43, and one end of the third support rod 42 and one end of each third mounting hole cross bar 43 are fixedly connected to the same side of the third rectangular frame 41, and the other end is fixedly connected to the second cross bar mounting rod 44, and the two third mounting hole cross bars 43 are arranged on both sides of the third support rod 42 and are symmetrically arranged about the third support rod 42.

[0100] Each third mounting hole cross bar 43 is provided with a row of column mounting holes 5 , and the third rectangular frame 41 is parallel to each third mounting hole cross bar 42 and is provided with a row of chassis mounting holes 6 at the ends of two sides away from the two third mounting hole cross bars 43 .

[0101] Therefore, the rear chassis 4 plays a supporting role by setting a third rectangular frame 41 and at least one third support rod 42. The connection with the column mounting part 1 can be achieved by setting two third mounting hole cross bars 43, a second cross bar mounting rod 44 and a row of column mounting holes 5 on each third mounting hole cross bar 43. The connection with the middle chassis 3 can be achieved by setting a row of chassis mounting holes 6 at the ends of two sides of the third rectangular frame 41 parallel to each third mounting hole cross bar 42 and away from the two third mounting hole cross bars 43.

[0102] Figure 5 A structural schematic diagram of a column mounting member provided in an embodiment of the utility model. Figure 5 The camera connecting member 12 in each set of column mounting members 1 includes a camera fixing cross bar 121 and a cross bar connecting member 122 .

[0103] For each group of column mounting parts 1 , the camera fixing cross bar 121 of the group is fixedly mounted on the cross bar connecting part 122 of the group, and the cross bar connecting part 122 of the group is fixedly mounted on the upper end of the column 111 of the group.

[0104] Among them, continue to see Figure 5 Each group of mounting columns 11 also includes two column support rods 113. For each group of mounting columns 11, one end of each column support rod 133 of the group is fixedly connected to the middle part of the column 111 of the group, and the other end is respectively fixedly connected to one end of the plane bracket 112 of the group. The two column support rods 113 of the group are located in the same plane as the column 111 of the group, and the two column support rods 113 of the group and the plane bracket 112 of the group form a triangular structure.

[0105] Therefore, by arranging two column support rods 113 and the column 111 to be located in the same plane, and the two column support rods 113 and the plane bracket 112 form a triangular structure, the column 111 is supported.

[0106] Figure 6 A schematic diagram of the structure of the crossbar connector provided by the embodiment of the utility model, see Figure 5 and Figure 6 Each group of column mounting parts 1 also includes a first U-shaped bolt group 13 and a second U-shaped bolt group 14. The crossbar connecting member 122 of each group is a flat steel plate, and the flat steel plate is provided with a first group of circular through holes 1221 arranged vertically and a second group of circular through holes 1222 arranged horizontally.

[0107] For each group of column mounting parts 1, the camera fixing cross bar 121 of the group is fixedly installed on the upper end of the column 111 of the group through the first U-shaped bolt group 13 of the group, the first group of circular through holes 1221 of the group, the second U-shaped bolt group 14 of the group and the second group of circular through holes 1222 of the group.

[0108] Each group of circular through holes includes two pairs of circular through holes arranged opposite to each other, the two circular through holes of each pair of circular through holes are located in the same straight line, and each group of U-shaped bolt groups includes two pairs of U-shaped bolts and nut assemblies.

[0109] During installation, the two U-bolts of the first U-bolt group 13 are sleeved on the periphery of the camera fixing crossbar 121, and pass through the two pairs of circular through holes of the first group of circular through holes 1221 and are fixedly connected with the corresponding nuts, so that the camera fixing crossbar 121 is fixed to the crossbar connecting piece 122. Then, the two U-bolts of the second U-bolt group 14 are sleeved on the periphery of the upper end of the column 111, and pass through the two pairs of circular through holes of the second group of circular through holes 1222 and are fixedly connected with the corresponding nuts, so that the crossbar connecting piece 122 is fixedly installed on the upper end of the column 111, thereby fixing the camera fixing crossbar 121 to the upper end of the column 111. And the height position of the camera fixing crossbar 121 can be adjusted by moving the second U-bolt group 14 up and down.

[0110] Thus, the camera fixing cross bar 121 is fixed to the upper end of the column 111 by means of the cooperation between the U-shaped bolt group and the circular through hole.

[0111] Figure 7 A schematic diagram of the structure of the camera fixing cross bar provided in the embodiment of the utility model, see Figure 7The camera fixing cross bar 121 of each group is a square tube provided with a first through hole 1211 and a long strip through hole 1212. The circular through hole 1211 and the long strip through hole 1212 are both used to install test equipment, such as a camera. If the circular through hole 1211 is used to install the test equipment, the camera cannot be moved. If the long strip through hole 1212 is used to install the camera, the camera can be installed at any position of the long strip through hole 1212 according to actual needs, so as to adjust the camera installation position. The first through hole 1211 can be a circular through hole.

[0112] Therefore, the camera is fixed by setting a circular through hole 1211 on the camera fixing cross bar 121, and the camera installation position is adjusted by setting a square tube with a long strip through hole 1212 on the camera fixing cross bar 121.

[0113] Continue to see Figure 1 The adjustable stand provided in the embodiment of the utility model also includes at least six pairs of movable caster assemblies 7, wherein the total number of movable caster assemblies 7 is an even number, and at least two pairs of movable caster assemblies 7 are fixedly installed on the lower side of each chassis, and each pair of movable caster assemblies are arranged opposite to each other.

[0114] That is to say, the lower side of each chassis is slidable by at least two pairs of movable caster assemblies 7. The movable caster assembly 7 may include a movable caster mounting plate and a movable caster, wherein the movable caster is fixedly mounted on the movable caster mounting plate, and the movable caster mounting plate is fixedly mounted on the lower side of the corresponding chassis, wherein the fixed mounting method may be welding, and the movable caster mounting plate may be a flat steel plate with a circular through hole, and the circular through hole is used to mount the movable caster.

[0115] Thus, the movement of the chassis is achieved by fixing at least two pairs of movable caster assemblies 7 on the lower side of each chassis.

[0116] Continue to see Figure 1 The adjustable stand provided in the embodiment of the utility model also includes two support frames 8, the thickness of each support frame 8 is the same as the thickness of the front chassis 2, the thickness of the middle chassis 3 and the thickness of the rear chassis 4, and the front chassis 2 and the rear chassis 4 are installed on the lower side of the middle chassis 3, and the two support frames 8 are arranged opposite to each other on the left and right and fixedly installed on the lower side of the middle chassis 3, wherein the fixed installation method can be welding.

[0117] Therefore, by arranging the support frame 8 on the lower side of the middle chassis 3, the front chassis 2, the middle chassis 3 and the rear chassis 4 are installed in the same plane, thereby ensuring the stability of the adjustable stand.

[0118] The working principle of the utility model is introduced below:

[0119] During operation, first, the front chassis 2, the middle chassis 3 and the rear chassis 4 in the movable chassis are connected and fixed through the corresponding chassis mounting holes 6 according to the length of the experimental vehicle, and the length of the movable chassis can be adjusted by connecting and fixing the positions of the different chassis mounting holes 6 of each chassis section, such as the staggered installation mentioned above.

[0120] Then, each column 111 is fixedly connected to the movable chassis through the corresponding column mounting hole 5 , and the installation position of each mounting column mounting member 1 can also be adjusted by connecting and fixing the positions of different column mounting holes 5 .

[0121] Finally, the camera fixing cross bar 121 is fixed to the cross bar connecting member 122 by the first U-shaped bolt group 13, and then the cross bar connecting member 122 is fixedly installed on the upper end of the column 111 by the second U-shaped bolt group 14, and the installation height of the camera fixing cross bar 121 is adjusted. In addition, the width dimension of the camera fixing cross bar 121 in the adaptation vehicle model can be adjusted by adjusting the installation position of the first U-shaped bolt group 13 at the camera fixing cross bar 121.

[0122] Those skilled in the art can understand that the accompanying drawings are only schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present utility model.

[0123] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed accordingly and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined into one module, or can be further divided into multiple sub-modules.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable stand, characterized in that: It includes a movable chassis and at least one set of column mounting parts, wherein the at least one set of column mounting parts includes a mounting column and a camera connecting part, wherein the mounting column includes a column and a plane bracket vertically connected to each other, and the plane bracket is provided with two rows of column mounting holes; The movable chassis includes a front chassis, a middle chassis and a rear chassis; The front end of the front chassis is provided with two rows of column mounting holes, the rear end of the front chassis is provided with two rows of chassis mounting holes, the front end and the rear end of the middle chassis are each provided with two rows of chassis mounting holes, the left side and the right side of the middle chassis are each provided with two rows of column mounting holes, the front end of the rear chassis is provided with two rows of chassis mounting holes, and the rear end of the rear chassis is provided with two rows of column mounting holes; Each column mounting hole row and each column chassis mounting hole row are composed of at least four through holes distributed at equal intervals, two through holes at corresponding positions in two columns chassis mounting holes form a group of chassis mounting holes, and two through holes at corresponding positions in two columns column mounting holes form a group of column mounting holes; Any at least two groups of chassis mounting holes at the rear end of the front chassis are fixedly connected to any at least two groups of chassis mounting holes at the front end of the middle chassis by means of a locking device, and any at least two groups of chassis mounting holes at the rear end of the middle chassis are fixedly connected to any at least two groups of chassis mounting holes at the front end of the rear chassis by means of a locking device; For each group of column mounting parts, any adjacent at least two groups of column mounting holes of the planar bracket of the group of column mounting parts are fixedly connected to any adjacent at least two groups of column mounting holes of one of the front chassis, the middle chassis and the rear chassis through a locking device, and the camera connecting part of the group of column mounting parts is fixedly connected to the upper end of the column of the group.

2. The adjustable stand according to claim 1, characterized in that: The adjustable stand includes four sets of column mounting members; One of the four mounting columns is fixedly connected to any adjacent at least two groups of column mounting holes of the front chassis through any adjacent at least two groups of column mounting holes of its own plane bracket by a locking device, and another of the four mounting columns is fixedly connected to any adjacent at least two groups of column mounting holes of the rear chassis through any adjacent at least two groups of column mounting holes of its own plane bracket by a locking device; The remaining two mounting columns of the four mounting columns are arranged opposite to each other on the left and right, and one of the remaining two mounting columns is fixedly connected to any adjacent at least two groups of column mounting holes set on the left side of the middle chassis through any adjacent at least two groups of column mounting holes of its own plane bracket by a locking device, and the other of the remaining two mounting columns is fixedly connected to any adjacent at least two groups of column mounting holes set on the right side of the middle chassis through any adjacent at least two groups of column mounting holes of its own plane bracket by a locking device.

3. The adjustable stand according to claim 2, characterized in that: The front section chassis comprises a first rectangular frame, at least one first support rod, two first mounting hole cross rods and a first cross rod mounting rod; Each first support rod and the first crossbar mounting rod are fixedly connected to the inside of the first rectangular frame and are respectively parallel to any side of the first rectangular frame; The two first mounting hole cross bars are arranged in parallel, and one end of each first mounting hole cross bar is fixedly connected to the same side of the first rectangular frame, and the other end is fixedly connected to the first cross bar mounting rod; Each first mounting hole cross bar is provided with a row of column mounting holes, and the first rectangular frame is parallel to each first mounting hole cross bar and is provided with a row of chassis mounting holes at the ends of two sides away from the two first mounting hole cross bars.

4. The adjustable stand according to claim 2, wherein: The middle chassis includes a second rectangular frame and two T-shaped brackets and a second support rod arranged in the second rectangular frame, wherein each T-shaped bracket includes a second mounting hole cross bar and a non-mounting hole cross bar perpendicular to each other; The second support rod is parallel to the first side of the second rectangular frame, the two T-shaped brackets are symmetrically arranged on both sides of the second support rod, and the second mounting hole cross bar of each T-shaped bracket is parallel to the first side, and the non-mounting hole cross bar of each T-shaped bracket is fixedly connected to the corresponding second side, wherein the first side is any side of the second rectangular frame, and the second side is a side of the second rectangular frame that is perpendicular to the first side; A row of column mounting holes is respectively arranged on the left and right sides of each second mounting hole crossbar, and a row of chassis mounting holes is arranged at both ends of each second side of the second rectangular frame.

5. The adjustable stand according to claim 2, characterized in that: The rear section chassis includes a third rectangular frame, at least one third support rod, two third mounting hole cross rods and a second cross rod mounting rod; Each third support rod and the second crossbar mounting rod are fixedly connected to the inside of the third rectangular frame, and are respectively parallel to any side of the third rectangular frame; The two third mounting hole cross bars are arranged in parallel, and one end of each third mounting hole cross bar is fixedly connected to the same side of the third rectangular frame, and the other end is fixedly connected to the second cross bar mounting rod; Each third mounting hole cross bar is provided with a row of column mounting holes, and the third rectangular frame is parallel to each third mounting hole cross bar and is provided with a row of chassis mounting holes at the ends of two sides away from the two third mounting hole cross bars.

6. The adjustable stand according to claim 1, wherein: The camera connecting piece in each set of column mounting pieces includes a camera fixing cross bar and a cross bar connecting piece; For each group of column mounting parts, the camera fixing cross bar of the group is fixedly mounted on the cross bar connecting part of the group, and the cross bar connecting part of the group is fixedly mounted on the upper end of the column of the group.

7. The adjustable stand according to claim 6, characterized in that: Each set of mounting posts also includes two post support rods; For each group of installation columns, one end of each column support rod of the group is fixedly connected to the middle part of the column of the group, and the other end is fixedly connected to one end of the planar bracket of the group. The two column support rods of the group are located in the same plane as the columns of the group, and the two column support rods of the group form a triangular structure with the planar bracket of the group.

8. The adjustable stand according to claim 6, wherein: Each set of column mounting members also includes a first U-shaped bolt group and a second U-shaped bolt group, and the crossbar connecting member of each set is a flat steel plate, and the flat steel plate is provided with a first set of circular through holes arranged vertically and a second set of circular through holes arranged horizontally; For each set of column mounting parts, the camera fixing cross bar of the group is fixedly mounted on the upper end of the column of the group through the first U-shaped bolt group of the group, the first group of circular through holes of the group, the second U-shaped bolt group of the group and the second group of circular through holes of the group.

9. The adjustable stand according to claim 8, characterized in that: Each group of circular through holes includes two pairs of circular through holes arranged opposite to each other, the two circular through holes of each pair of circular through holes are located in the same straight line, and each group of U-shaped bolt assemblies includes two pairs of U-shaped bolts and nut assemblies.

10. The adjustable stand according to claim 1, wherein: The adjustable stand further comprises at least six pairs of movable caster assemblies, wherein the total number of the movable caster assemblies is an even number; At least two pairs of movable caster assemblies are fixedly installed on the lower side of each chassis, and each pair of movable caster assemblies are arranged opposite to each other.

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