A test platform with adjustable length

Abstract

The application discloses a length-adjustable test platform, which comprises a support box body, the support box body comprising a first main body component, a second main body component, a transverse moving device, a plurality of chain plate guide rails, an extendable table top and two extension devices arranged side by side; the transverse moving device is arranged at the bottom of the first main body component, so that the first main body component can move transversely on the track; the extendable table top comprises a plurality of chain plate devices, each chain plate device comprises a chain plate, chain links are arranged at both ends of the chain plate, a pin shaft and a pin hole are arranged on both sides of each chain link respectively, the pin shaft is inserted into the pin hole of the adjacent chain link, and the connected chain plate devices form the extendable table top; the two extension devices are arranged in the first main body component and the second main body component respectively, the upper ends of the two extension devices are connected with the chain plate devices at both ends of the extendable table top, the chain plate devices are driven to move, and the extendable table top can be switched between the contracted state and the expanded state. The test platform can conveniently and quickly adjust the length of the test platform.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing, in particular to a length-adjustable testing platform. BACKGROUND

[0002] The testing of static or dynamic balance of machines or structural components usually requires a testing platform. Since the types and specifications of machines or structural components to be tested each time are different, the size is also different, and therefore the length and height of the testing platform supporting the testing platform often need to be adjusted.

[0003] The size of the testing platform currently built is usually determined at the assembly stage, and the height or length needs to be manually disassembled and assembled, which is time-consuming and laborious. In addition, the platform occupies a large space when it is idle, and it is not convenient to enter and exit the site, which brings many difficulties to other normal work, and it is difficult to meet the flexible and variable demands of work. SUMMARY

[0004] To solve the above technical problems, the purpose of the present application is to provide a length-adjustable testing platform.

[0005] The technical scheme provided by the present application is as follows:

[0006] A length-adjustable testing platform comprises a support box body, the support box body comprises a first main component, a second main component, a transverse moving device, a plurality of chain plate guide rails, an extension table, and two extension devices arranged side by side; the transverse moving device is located at the bottom of the first main component, so that the first main component can move transversely on the track; the extension table comprises a plurality of chain plate devices, each chain plate device comprises a chain plate, and chain links are arranged at both ends of the chain plate; a pin shaft and a pin hole are respectively arranged on both sides of each chain link; the pin shaft is inserted into the pin hole of the adjacent chain link, so that the connected chain plate devices form the extension table; the two extension devices are respectively located in the first main component and the second main component, and the upper ends are connected to the chain plate devices at both ends of the extension table to drive the chain plate devices to move, so that the extension table can be switched between the contracted state and the expanded state; when the testing platform is in the contracted state, the first main component and the second main component are close to each other, and the extension device is contracted so that the plurality of chain plate devices are located in the first main component and the second main component; when expanded, the transverse moving device drives the first main component to move away from the second main component, and at the same time, the two extension devices push the chain plate devices, so that each chain plate device is expanded upward until the length of the chain plate device meets the size requirement of the platform; when re-contracted, the transverse moving device drives the first main component to move towards the second main component, and at the same time, the two extension devices pull back the chain plate devices, so that each chain plate device is retracted downward.

[0007] Preferably, each of the telescopic devices comprises a telescopic device motor, a telescopic device reducer, a telescopic device screw rod, and a telescopic device sleeve, the telescopic device motor being connected to the telescopic device screw rod through the telescopic device reducer, the telescopic device sleeve being located at the top of the telescopic device screw rod and connected to the chain plate device, so that the telescopic device motor drives the telescopic device screw rod to rotate through the telescopic device reducer, and then drives the telescopic device sleeve to move up and down, thereby realizing the expansion or contraction of the telescopic table top.

[0008] Preferably, each of the pin shafts is provided with a chain plate roller, and the test platform is provided with two chain plate guide rails at each end of each telescopic table top, for accommodating the chain plate rollers on the chain plate devices at the ends of the corresponding telescopic table top and guiding the chain plate rollers, so that each chain plate device is expanded or retracted along the chain plate guide rails.

[0009] Preferably, a positioning rod is arranged between the telescopic device sleeve and the chain plate device, the positioning rod is provided with a through hole in the middle for inserting and fixing the telescopic device sleeve, and positioning rollers are arranged at both ends of the positioning rod, the positioning rollers being accommodated in the chain plate guide rails, so that the telescopic device sleeve and the chain plate device are connected through the positioning rod.

[0010] Preferably, the lateral movement device is a driving trolley, comprising a trolley motor, a trolley reducer, a trolley support frame, and a wheel, the wheel being rotatably connected to the trolley support frame through a wheel shaft on the wheel, the trolley support frame being fixed to the first main body member, the trolley motor being connected to the wheel shaft through the trolley reducer, so that the trolley motor drives the wheel to rotate through the trolley reducer and the wheel shaft, thereby realizing the lateral movement of the first main body member.

[0011] Preferably, a height adjusting device is connected below the telescopic device for driving the telescopic device to move up and down to adjust the height of the telescopic table top.

[0012] Preferably, the height adjusting device comprises a connecting mechanism and a jacking mechanism, the jacking mechanism comprising a jacking device motor, a double-shaft reducer, two jacking device screw rods, and two jacking device sleeves, the corresponding jacking device screw rods and the telescopic device being connected to the connecting mechanism, the jacking device sleeves being fixed to the first main body member and the second main body member, respectively, the jacking device motor being connected to the two jacking device screw rods through the double-shaft reducer, so that the jacking device motor drives the jacking device screw rods to rotate through the double-shaft reducer, and then drives the connecting mechanism to move up and down, thereby adjusting the height of the telescopic table top through the telescopic device.

[0013] Preferably, the connecting mechanism comprises a horizontal connecting plate, two vertical connecting plates, the jacking device screw rod and the telescopic device are connected to the horizontal connecting plate, the two vertical connecting plates are located on both sides of the horizontal connecting plate, and a vertical track strip is arranged on the outer side of each vertical connecting plate and used for cooperating with a guide fixed on the first main body member or the second main body member.

[0014] Preferably, the support box comprises two first telescopic platforms arranged side by side and a second telescopic platform located between the two first telescopic platforms, two first telescopic devices and two second telescopic devices are arranged corresponding to each first telescopic platform and the second telescopic platform, the two first telescopic devices are respectively mounted on the first main body member and the second main body member, and the two second telescopic devices are respectively connected with the height adjusting devices.

[0015] Preferably, the test platform comprises two support boxes arranged side by side, namely a first support box and a second support box; the first support box comprises a first main body member and a second main body member arranged side by side and two first telescopic platforms and a second telescopic platform arranged side by side, the second telescopic platform is located between the two first telescopic platforms, two first telescopic devices and two second telescopic devices are arranged corresponding to each first telescopic platform and the second telescopic platform, the two first telescopic devices are respectively mounted on the first main body member and the second main body member, and the two second telescopic devices are respectively connected with the height adjusting devices; the second support box comprises two third main body members arranged side by side and two third telescopic platforms arranged side by side, two third telescopic devices are arranged corresponding to each third telescopic platform, and the two third telescopic devices are respectively mounted on the third main body member and the fourth main body member.

[0016] Compared with the prior art, the test platform with adjustable length of the present application can switch the telescopic platform between the contracted state and the expanded state by arranging the horizontal moving device, the plurality of chain plate guide rails, the telescopic platform and the two telescopic devices, driving the chain plate device to move through the two telescopic devices connected to the chain plate device at both ends of the telescopic platform, so that the length adjustment of the test platform can be conveniently and quickly realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1Structure diagram of the test platform with adjustable length according to the embodiment of the present application;

[0019] Figure 2 For Figure 1 Structure diagram of the first support box in the test platform shown in the figure in an unfolded state;

[0020] Figure 3 For Figure 2 Structure diagram of the first main body member in the first support box shown in the figure;

[0021] Figure 4 For Figure 2 Structure diagram of the chain plate device in the first support box shown in the figure;

[0022] Figure 5 For Figure 2 Structure diagram of the chain plate guide rail in the first support box shown in the figure;

[0023] Figure 6 For Figure 2 Structure diagram of the telescopic device in the first support box shown in the figure;

[0024] Figure 7 For Figure 2 Structure diagram of the positioning rod in the first support box shown in the figure;

[0025] Figure 8 For Figure 2 Structure diagram of the jacking device, connecting mechanism and their adjacent structure in the first support box shown in the figure;

[0026] Figure 9 For Figure 8 Structure diagram of the jacking device, connecting mechanism and their adjacent structure from another angle shown in the figure;

[0027] Figure 10 For Figure 2 Structure diagram of the jacking device in the first support box shown in the figure;

[0028] Figure 11 For Figure 2 Structure diagram of the connecting mechanism in the first support box shown in the figure;

[0029] Figure 12 For Figure 2 Structure diagram of the transverse movement device in the first support box shown in the figure;

[0030] Figure 13 For Figure 2 Structure diagram of the anti-overturning device in the first support box shown in the figure;

[0031] Figure 14 For Figure 1 Structure diagram of the second support box in the test platform shown in the figure;

[0032] Figure 15 Fig. 4 is a structural schematic view of the third main member in the second support box shown in Fig. 3; Figure 14

[0033] Figure 16 Fig. 5 is a structural schematic view of the second telescopic device in the second support box shown in Fig. 3; Figure 14

[0034] Figure 17 Fig. 6 is a structural schematic view of the second transverse moving device in the second support box shown in Fig. 3; Figure 14

[0035] Figure 18 Fig. 7 is a structural schematic view of the first support box in the initial state in the test platform shown in Fig. 1. Figure 1

[0036] Fig. 1, 1, first support box, 101, first main member, 101-1, middle support channel steel, 101-2, top support channel steel, 101-3, connecting channel steel, 101-4, support I-beam, 101-5, bottom pad, 102, second main member, 103, bottom fixed plate, 104, first transverse moving device, 104-1, trolley motor, 104-2, trolley reducer, 104-3, fastening plate, 104-4, trolley support frame, 104-5, wheel, 105, guide, 106, chain plate guide rail, 107, first positioning rod, 107-1, through hole, 109, chain plate device, 109-1, chain plate, 109-2, chain link, 109-3, pin shaft, 109-4, chain plate roller, 109-5, pin hole, 110, anti-skid protection steel plate, 111, control device, 112, jacking device, 112-1, jacking device motor, 112-2, double-shaft reducer, 112-3, jacking device screw rod, 112-4, jacking device shaft sleeve, 113, connecting mechanism, 113-1, horizontal connecting plate, 113-2, vertical connecting plate, 113-3, track strip, 114, first telescopic device, 114-1 telescopic device motor, 114-2, telescopic device reducer, 114-3, telescopic device screw rod, 114-4, telescopic device shaft sleeve, 115, anti-overturning device, 115-1, anti-overturning frame, 115-2, reinforcing rib plate, 115-3, anti-overturning device wheel, 116, locking device,

[0037] ​​​​2-Second support box body, 201, third main body member, 201-1, I-beam, 201-2, bottom support channel steel, 201-3, top support I-beam, 201-4, cushion block, 202, third telescopic device, 202-1, third telescopic device motor, 202-2, third telescopic device reducer, 202-3, third telescopic device screw rod, 202-4, third telescopic device sleeve, 205, second transverse movement device, 205-1, second trolley motor, 205-2, second trolley reducer, 205-3, second trolley main frame, 205-4, second trolley fastening plate, 205-5, second trolley wheel, 206, second positioning rod, 207, cover plate,

[0038] 3-Track DETAILED DESCRIPTION

[0039] In order to make the technical personnel in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of protection of the present application.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In addition, the terms "first", "second", "third", etc. are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" or "several" is two or more, unless otherwise explicitly and specifically limited.

[0043] It is to be understood that the structures, proportions, sizes, etc. shown in the drawings of the present disclosure are merely used to cooperate with the content disclosed in the present disclosure for understanding and reading by those skilled in the art, and are not used to limit the defined conditions that can be implemented by the present application, and therefore do not have technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0044] As shown in Figure 1 , the present embodiment provides a test platform, which includes a first support box 1 and a second support box 2. The first support box 1 and the second support box 2 can be used separately or in combination. Generally, only the first support box 1 is used in normal operation (and can also be referred to as the "main support box"), but the second support box 2 (and can also be referred to as the "auxiliary support box") is used in some special working conditions to achieve some specific functions, such as lengthening the placement of test equipment, expanding the test on the second support box 2, etc. The first support box 1 and the second support box 2 are placed on a track 3.

[0045] As shown in Figures 2 to 13 , in the present embodiment, the first support box 1 mainly includes a first main body member 101, a second main body member 102, a first transverse moving device 104, a plurality of chain plate guide rails 106, three telescopic table surfaces, and a plurality of telescopic devices arranged side by side.

[0046] As shown in Figure 2 , Figure 3 , in the present embodiment, the first main body member 101 includes a middle support channel steel 101-1, a top support channel steel 101-2, a connecting channel steel 101-3, a support I-beam 101-4, a bottom pad 101-5, a bottom fixed plate 103, an anti-skid protection steel plate 110, etc. The first main body member 101 includes four support I-beams 101-4, which are built to form three frames. The middle frame is shorter than the two side frames, and the lengths of the two side frames are equal. The bottom fixed plate 103 is fixed to the bottom of the middle frame, and the anti-skid protection steel plate 110 is fixed to the top of all the frames. The connecting channel steel 101-3 connects the middle two support I-beams 101-4. The bottom pad 101-5 is welded to the support I-beam 101-4 and is connected to the bottom plate below by bolts. The bottom plate is used to cooperate with the track. The shape and structure of the second main body member 102 are the same as those of the first main body member 101, and the two are arranged opposite to each other, and the three frames formed correspond to the three telescopic table surfaces. For the convenience of description, the two side telescopic table surfaces are named as the first telescopic table surface, and the middle telescopic table surface is named as the second telescopic table surface.

[0047] As shown in Figure 4 , in the present embodiment, the second support box 2 mainly includes a second main body member 202, a second transverse moving device 204, a plurality of chain plate guide rails 206, three telescopic table surfaces, and a plurality of telescopic devices arranged side by side.As shown, in the embodiment, each first telescopic deck includes a plurality of chain plate devices 109. Each chain plate device 109 includes a chain plate 109-1, a chain link 109-2, a pin shaft 109-3, and a chain plate roller 109-4. The chain plate 109-1 is connected to the chain link 109-2 by welding. The chain plate roller 109-4 is located on one side of the chain link 109-2, and the chain link 109-2 is connected to the chain plate roller 109-4 by the pin shaft 109-3. The other side of the chain link 109-2 is provided with a pin hole 109-5. The chain plate roller 109-4 is supported by the chain plate guide rail 106. The chain link 109-2 is fixed on the top support channel steel 101-2. Each chain plate device 109 is connected by the pin hole 109-5 of the chain link 109-2 and the pin shaft of the chain link 109-2 of the adjacent chain plate device. The chain plate device 109 is driven by the telescopic device to be pulled flat to form a platform. The second telescopic deck has substantially the same structure as the first telescopic deck, except that it is smaller in size, and thus will not be described here.

[0048] As shown in Figure 5 , in the embodiment, two chain plate guide rails 106 are respectively arranged at both ends of each telescopic deck to accommodate and guide the chain plate rollers 109-4 on the chain plate devices 109 at the ends of the corresponding telescopic deck. The chain plate guide rails 106 corresponding to the first telescopic deck are fixed on the first main body member 101 and the second main body member 102.

[0049] As shown in Figure 2 , Figure 6 , in the embodiment, one telescopic device is connected to each end of each telescopic deck. The first telescopic device 114 corresponds to the first telescopic deck, and the second telescopic device (not numbered) corresponds to the second telescopic deck. Each first telescopic device 114 includes a telescopic device motor 114-1 (preferably a servo motor), a telescopic device reducer 114-2 (preferably a planetary reducer), a telescopic device screw 114-3 (which is a trapezoidal screw with self-locking function), and a telescopic device shaft sleeve 114-4. The telescopic device motor 114-1 is connected to the telescopic device screw 114-3 through the telescopic device reducer 114-2. The telescopic device shaft sleeve 114-4 is located at the top of the telescopic device screw 114-3 and is connected to the chain plate device 109. The telescopic device motor 114-1 drives the telescopic device screw 114-3 to rotate through the telescopic device reducer 114-2, thereby driving the telescopic device shaft sleeve 114-4 to move up and down, realizing the expansion or contraction of the telescopic deck. The second telescopic device has the same structure as the first telescopic device 114, and thus will not be described here.

[0050] As shown in Figure 7As shown, in the embodiment, a first positioning rod 107 is arranged between the telescopic device shaft sleeve 114-4 and the chain plate device 109. A through hole 107-1 is arranged in the middle of the first positioning rod 107 for inserting and fixing the telescopic device shaft sleeve 114-4. Positioning rollers (not shown) are arranged at both ends of the first positioning rod 107. The positioning rollers are accommodated in the chain plate guide rail 106 to guide the first positioning rod 107 to move up and down. The telescopic device shaft sleeve 114-4 and the chain plate device 109 are connected through the first positioning rod 107, which can simplify the structure of the chain plate device 109.

[0051] In the telescopic device corresponding to the first telescopic table top, the telescopic device motor 114-1 and the telescopic device reducer 114-2 are fixed on the first main body member 101 and the second main body member 102. The telescopic device shaft sleeve 114-4 is positioned and matched with the middle through hole of the first positioning rod 107.

[0052] As shown, Figures 8 to 11 In the embodiment, the telescopic device of the second telescopic table top is connected with a height adjusting device below for driving the telescopic device to move up and down to adjust the height of the telescopic table top. The height adjusting device includes a connecting mechanism 113 and a jacking device 112.

[0053] As shown, Figure 10 In the embodiment, the jacking device 112 includes a jacking device motor 112-1, a double-shaft reducer 112-2, two jacking device lead screws 112-3, and two jacking device shaft sleeves 112-4. The jacking device lead screws 112-3 are placed on the connecting mechanism 113 and have the same length, and are respectively located on both sides of the double-shaft reducer 112-2. The jacking device shaft sleeves 112-4 are connected with the bottom fixed plate 103 through bolts.

[0054] As shown, Figure 11 In the embodiment, the connecting mechanism 113 is a concave steel structure, including a horizontal connecting plate 113-1 and two vertical connecting plates 113-2. The jacking device lead screws 112-3 and the first telescopic device 114 or the second telescopic device are connected to the horizontal connecting plate 113-1. The two vertical connecting plates 113-2 are located on both sides of the horizontal connecting plate 113-1. A vertical track strip 113-3 is arranged on the outer side of each vertical connecting plate 113-2, which is used to cooperate with the guide 105 fixed on the first main body member or the second main body member. The guide 105 and the track strip 113-3 guide the connecting mechanism to move up and down along the first main body member or the second main body member. The chain plate guide rail 106 is welded on the inner side of each vertical connecting plate 113-2.

[0055] As shown, Figure 12As shown, in this embodiment, the first transverse moving device 104 is a drive trolley, which includes a trolley motor 104-1, a trolley reducer 104-2 (preferably a planetary reducer), a fastening plate 104-3, a trolley support frame 104-4, and a trolley wheel 104-5. The trolley motor 104-1 and the trolley reducer 104-2 are connected to the trolley 104-4 and the trolley support frame 104-5 through a shaft. The fastening plate 104-3 has a through hole that cooperates with the trolley support frame 104-5. The fastening plate 104-3 is connected to the middle support channel steel 101-1 through a bolt (each middle support channel steel 101-1 of the first main body member 101 is connected to one first transverse moving device 104). The trolley motor 104-1 is connected to the trolley wheel shaft through the trolley reducer 104-2, so that the trolley motor 104-1 drives the trolley wheel 104-5 to rotate through the trolley reducer 104-2 and the trolley wheel shaft, thereby realizing the transverse movement of the first main body member 101.

[0056] As shown, Figure 13 In this embodiment, the first support box body 1 is also provided with an anti-overturning device 115, which includes an anti-overturning frame 115-1, a reinforcing rib plate 115-2, and an anti-overturning device wheel 115-3. The anti-overturning frame 115-1 is connected to the reinforcing rib plate 115-2 through welding, and is connected to the anti-overturning device wheel 115-3 through a shaft. The top of the anti-overturning frame 115-1 is connected to the middle support channel steel 101-1 through welding.

[0057] One end of the first main body member 101 is fixed to the track through a foundation bolt, and the other end is moved on the track with the locking device 116 and is fixed to the track through the locking device 116. The middle of the first main body member 101 is supported by the middle support channel steel 101-1 and the connecting channel steel 101-3 as a platform. The jacking device 112 is connected to the bottom fixed plate 103 through a bolt. The first transverse moving device 104 is fixed to the bottom of the first main body member 101. The support steel plate 101-1 is connected to the anti-overturning device 115 through welding. The inner sides of the two side frames of the first main body member 101 and the inner sides of the vertical connecting plates are welded with the chain plate guide rails 106, and the outer side of the middle frame of the first main body member 101 is welded with the guide 105. The top of the first main body member 101 is connected to the anti-skid protection steel plate 110 through welding. The control device 111 is fixed to the support steel plate 101-1 through bolt connection.

[0058] As shown, Figures 14 to 17As shown, in this embodiment, the second support box 2 includes two third main components 201 arranged side by side, a second lateral moving device 205, and two third telescopic platforms arranged side by side. Each third telescopic platform is provided with two third telescopic devices 202, which are respectively installed on the two third main components 201. The structure of the third telescopic platform is the same as that of the first telescopic platform, except for the width, so it will not be described further. Other identical parts will also not be repeated.

[0059] like Figure 15 As shown, in this embodiment, the third main component 201 mainly includes an I-beam 201-1, a bottom supporting channel steel 201-2, a top supporting I-beam 201-3, and a pad block 201-4. The I-beam 201-1 is welded and spliced ​​together with the bottom supporting channel steel 201-2 and the top supporting I-beam 201-3. The pad block 201-4 is fixed to the bottom supporting channel steel 201-1 by bolts.

[0060] like Figure 16 As shown, in this embodiment, the third telescopic device 202 includes a third telescopic device motor 202-1, a third telescopic device reducer 202-2, two third telescopic device lead screws 202-3, and two third telescopic device sleeves 202-4. The third telescopic device lead screws 202-3 are placed on the pad 201-4 and maintain the same height as the third telescopic device reducer 202-2. The third telescopic device sleeves 202-4 are engaged with the through hole in the middle of the second positioning rod 206.

[0061] like Figure 17 As shown, in this embodiment, the second lateral movement device 205 is also a drive trolley structure, including a second trolley motor 205-1, a second trolley reducer 205-2, a second trolley main frame 205-3, a second trolley fastening plate 205-4, and a second trolley wheel 205-5. The second trolley wheel 205-5 is connected to the second trolley main frame 205-3 via a wheel axle. The second trolley fastening plate 205-4 is connected to the bottom support channel steel 201-2 via bolts.

[0062] The third main component 201 is fixed to the floor at both ends by anchor bolts. The anti-tipping trolley 203 is welded to the bottom support channel steel 201-2. The second lateral movement device 205 is fitted to the bottom support channel steel 201-2 via a fastening plate 205-3. The third telescopic device 202 is placed on the pad block 201-4. The electrical control box 204 is welded into the I-beam 201-2. In the third main component 201, a chain guide rail is welded to the inner side of the I-beam 201-1, and a cover plate 207 is welded to the top. The second positioning rod 206 connects the third telescopic device to the third telescopic platform by fitting and fixing it with the sleeve 202-4.

[0063] The working method of the test platform in this embodiment is as follows: taking the first support box 1 as an example, the first lateral moving device 104 drives the main support box to move in the horizontal direction, extends the chain plate device 109, and changes the platform length; at the same time, the lifting device 112 lifts through the screw, realizes the movement of the chain plate device 109 in the vertical direction, and changes the platform height.

[0064] When using the test platform, first loosen the anchor bolts in the locking device 116 with a wrench, so that one end of the first support box 1 is in a movable state. For example... Figure 18 As shown, in the initial state, all chain plates 109-1 of the chain plate device 109 are hidden in the first main body component 101, and the chain plate rollers 109-4 are located in the chain plate guide rail 106. The platform in the first support box 1 is divided into three parts. The left and right chain plate devices 109 have the same width and height, and the height is fixed and cannot be adjusted. The middle chain plate device 109 is narrower than the two sides, but its height can be adjusted according to the lifting device 112. The lifting device 112 controls the lifting device screw 112-3 to adjust its position in the height direction through the lifting device motor 112-1. The lifting device screw 112-3 drives the connecting mechanism 113 to move in the first main body component 101 until the required height of the middle chain plate is reached. Once the height is determined, the chain plate device needs to be extended to build a platform of the required length.

[0065] The specific process of the chain plate device 109 unfolding to build a platform: in the initial state, the chain plate device is hidden between the first main body members 101, and as the first transverse moving device 104 moves in the horizontal direction in the bottom plate track, the extension device screw rod 114-3 in the jacking device rotates to drive the chain plate rollers 109-4 in the chain plate device to move upward along the chain plate guide rail 106, and when the chain plate device 109 reaches the top, it moves in the horizontal direction along the chain plate guide rail 106, the rear part of the link 109-2 of the previous section of chain plate device 109 is fixed with the front part of the link 109-2 of the next section of chain plate device 109 through the pin shaft 109-3, and each section of chain plate device 109 is matched as described above, and the top support channel steel 101-2 is welded in the first main body member 101 at both ends to support the chain plate device 109 at the ends of the platform, and each section of chain plate device 109 in the middle of the platform is tensioned by the matched pin shaft 109-3 to ensure the flatness and load-bearing capacity of the platform. When the platform is retracted, the chain plate device 109 slides to both sides of the box, and since each link 109-2 is connected by the pin shaft 109-3, the link 109-2 can rotate around the pin shaft and move to both sides of the box to realize the recycling function. The first transverse moving device 104 adjusts the disc spring in the trolley support frame 104-4 to change the height of the fastening plate 104-3, so that the fastening plate 104-3 is in close contact with the middle support channel steel 101-1, and then the bolt is used for reinforcement. The electric control box 204 controls the horizontal movement of the first transverse moving device 104 in the bottom plate track, and at the same time, the extension device screw rod 114-3 drags the chain plate device 109 to unfold from both sides of the first main body member 101 to the middle at the same time, until the extension length of the chain plate device 109 meets the size requirement of the platform (as shown in Figure 2 After the platform is built, the foot bolts of the locking device 116 are tightened to fix the first support box 1 on the bottom plate, and the anti-inclination device 115 abuts against the middle support channel steel 101-1 to prevent the first support box 1 from tilting and collapsing.

[0066] Similarly, the second support box 2 is deployed in the same way as the first support box 1. When the second support box 2 is needed for a specific working condition, the first support box 1 is first stretched, and after the stretching is completed, the position is confirmed, the locking device 116 of the first support box 1 is locked, and after the second support box is moved to the corresponding position through the bottom plate track, the live joint bolt welded on the outside of the I-beam 201-1 on the third main body member 201 is connected with the first support box 1, and then the second support box is deployed. Similar to the first support box 1, the second support box 2 platform is composed of two parts, the heights of the two parts are the same and cannot be adjusted. The platform length can only be adjusted by the second support box jacking chain plate device in the horizontal direction. The box jacking device can simultaneously jack the two side chain plate devices, so that the two side platforms of the second support box are expanded synchronously. The second transverse moving device 205 drives the third main body member 201 on one side of the second support box to move along the track, and the chain plate device hidden in the two side box frames moves to the middle under the drive of the jacking device until the platform reaches the required size. After the platform is built, the foot bolts of the locking device are tightened to fix the second support box platform. The anti-overturning device pushes against the bottom support channel steel 201-2, so that the second support box 2 does not tilt and collapse.

[0067] The platform expansion and contraction actions of the test platform as a whole can be controlled through a visual panel of a control cabinet, and the specific required expansion height and width of the platform can be realized by controlling the actions of the servo motor.

[0068] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent 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 will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adjustable length test platform, comprising: The test platform comprises a support box body, which comprises a first main body component, a second main body component, a lateral movement device, a plurality of chain plate guide rails, an extendable table top and two extension devices arranged side by side. The lateral movement device is arranged at the bottom of the first main body component, so that the first main body component can move laterally on the track. The extendable table top comprises a plurality of chain plate devices, each of which comprises a chain plate, and each chain plate has a chain link at both ends. A pin shaft and a pin hole are arranged on both sides of each chain link respectively. The pin shaft is inserted into the pin hole of the adjacent chain link, so that the connected chain plate devices form the extendable table top. The two extension devices are arranged in the first main body component and the second main body component respectively, and the upper ends of the two extension devices are connected to the chain plate devices at both ends of the extendable table top, so as to drive the chain plate devices to move, and the extendable table top can be switched between the contracted state and the expanded state. When the test platform is in the contracted state, the first main body component and the second main body component are close to each other, and the extension devices are contracted, so that the plurality of chain plate devices are located in the first main body component and the second main body component. When the test platform is expanded, the lateral movement device drives the first main body component to move away from the second main body component, and at the same time, the two extension devices push the chain plate devices, so that each chain plate device is expanded upward until the length of the chain plate device meets the size requirement of the platform. When the test platform is contracted again, the lateral movement device drives the first main body component to move towards the second main body component, and at the same time, the two extension devices pull the chain plate devices, so that each chain plate device is retracted downward. Each extension device comprises an extension device motor, an extension device reducer, an extension device screw rod and an extension device shaft sleeve. The extension device motor is connected to the extension device screw rod through the extension device reducer. The extension device shaft sleeve is arranged at the top of the extension device screw rod and connected to the chain plate device. The extension device motor drives the extension device screw rod to rotate through the extension device reducer, and then drives the extension device shaft sleeve to move up and down, so as to realize the expansion or contraction of the extendable table top. The outer end of each pin shaft is provided with a chain plate roller. The test platform is provided with two chain plate guide rails at both ends of each extendable table top respectively, which are used to accommodate the chain plate rollers on the chain plate devices at the ends of the corresponding extendable table top and guide the chain plate rollers, so that each chain plate device is expanded or retracted along the chain plate guide rail. A positioning rod is arranged between the extension device shaft sleeve and the chain plate device. The positioning rod has a through hole in the middle for inserting and fixing the extension device shaft sleeve, and positioning rollers are arranged at both ends of the positioning rod. The positioning rollers are accommodated in the chain plate guide rail, so that the extension device shaft sleeve and the chain plate device are connected through the positioning rod.

2. The length-adjustable test platform of claim 1, wherein, The lateral movement device is a driving trolley, which comprises a trolley motor, a trolley reducer, a trolley support frame and a wheel. The wheel is rotatably connected to the trolley support frame through a wheel shaft arranged thereon. The trolley support frame is fixed to the first main body component. The trolley motor is connected to the wheel shaft through the trolley reducer, so that the trolley motor drives the wheel to rotate through the trolley reducer and the wheel shaft, and the first main body component moves laterally.

3. The length-adjustable test platform of claim 1, wherein, A height adjusting device is connected below the extension device, which is used to drive the extension device to move up and down to adjust the height of the extendable table top.

4. The length-adjustable test platform of claim 3, wherein, The height adjusting device comprises a connecting mechanism and a jacking mechanism, the jacking mechanism comprises a jacking device motor, a double-shaft speed reducer, two jacking device lead screws and two jacking device shaft sleeves, the corresponding jacking device lead screws and telescopic devices are connected to the connecting mechanism, the jacking device shaft sleeves are fixed to the first main body member and the second main body member respectively, the jacking device motor is connected to the two jacking device lead screws through the double-shaft speed reducer, the jacking device motor drives the jacking device lead screws to rotate through the double-shaft speed reducer, and then drives the connecting mechanism to move up and down, and the height of the telescopic table top is adjusted through the telescopic device.

5. The length-adjustable test platform of claim 4, wherein, The connecting mechanism comprises a horizontal connecting plate and two vertical connecting plates, the jacking device lead screws and telescopic devices are connected to the horizontal connecting plate, the two vertical connecting plates are located on the two sides of the horizontal connecting plate, and a vertical track strip is arranged on the outer side of each vertical connecting plate and used for cooperating with a guide member fixed to the first main body member or the second main body member, the connecting mechanism is guided to move up and down along the first main body member or the second main body member through cooperation between the guide member and the track strip.

6. The length-adjustable test platform of claim 3 or 4 or 5, wherein, The support box body comprises two first telescopic table tops and one second telescopic table top arranged side by side, the second telescopic table top is located between the two first telescopic table tops, two first telescopic devices and two second telescopic devices are arranged corresponding to each first telescopic table top and second telescopic table top, the two first telescopic devices are mounted on the first main body member and the second main body member respectively, and the two second telescopic devices are connected with the height adjusting device below.

7. The length-adjustable test platform of claim 3 or 4 or 5, wherein, The test platform comprises two support box bodies arranged side by side, namely a first support box body and a second support box body; the first support box body comprises a first main body member and a second main body member arranged side by side and two first telescopic table tops and one second telescopic table top arranged side by side, the second telescopic table top is located between the two first telescopic table tops, two first telescopic devices and two second telescopic devices are arranged corresponding to each first telescopic table top and second telescopic table top, the two first telescopic devices are mounted on the first main body member and the second main body member respectively, and the two second telescopic devices are connected with the height adjusting device below; the second support box body comprises two third main body members arranged side by side and two third telescopic table tops arranged side by side, two third telescopic devices are arranged corresponding to each third telescopic table top, and the two third telescopic devices are mounted on the third main body member and the fourth main body member respectively.

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