Static strength test mounting tool for railcar suspension seat

Abstract

Provided is a mounting fixture for static strength test of rail vehicle suspension seat, which has left and right side loading mechanisms, bolts, nuts, gaskets and a bottom plate; the bottom plate is welded by transverse channel steel I and a number of longitudinal channel steels II, and the side beam of transverse channel steel I is provided with axle positioning strip holes; the left and right side loading mechanisms are respectively composed of a bottom connecting piece with positioning mounting holes, a vertical channel steel III and a top mounting plate; the bottom connecting piece is vertically welded to the bottom of vertical channel steel III, and the top of vertical channel steel III vertically supports the top mounting plate, and the vertical channel steel III and the top mounting plate form an inverted "L" type leg structure, and the opening size of the left and right side loading mechanisms of the fixture can be adaptively adjusted by adjusting the "L" type leg spacing. The present invention solves the technical problem of adaptive adjustment of different opening sizes of the suspension seat through a simple structure, has a streamlined structure, sufficient measuring points, and effectively improves the reuse rate of the fixture; saves manpower and material resources, and is more economical and practical.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary tooling for physical measurement of railway vehicle testing, and in particular relates to a static strength test mounting tooling for a railway vehicle suspension seat with a simplified structure and more sufficient measuring points. Background Art

[0002] In the actual application of the static strength test of the rail vehicle suspension seat, first of all, its static strength must meet the actual use requirements. The rail vehicle suspension seat is analyzed by computer three-dimensional modeling and simulation through finite element analysis to simulate the static load borne by the suspension seat of the rail vehicle in use, and the maximum stress and maximum deformation allowed by the suspension seat under the conditions of ensuring safety and durability are determined. It is judged whether the suspension seat design meets the design requirements to verify its design rationality, so that the suspension seat design meets the actual application and national or industry standards for the static strength requirements of the rail vehicle suspension seat. In this regard, under the existing technology, the mounting tooling for the static strength test of the rail vehicle suspension seat needs to be specially customized, the versatility is not ideal, the reuse rate is not high, the structure is too complicated, especially the tooling opening size cannot be adaptively adjusted according to different types of suspension seats. Therefore, the following technical solution is proposed. Summary of the invention

[0003] The technical problem solved by the present invention is as follows: a mounting tool for static strength test of rail vehicle suspension seat is provided, which solves the technical problems that the mounting tool for static strength test of rail vehicle suspension seat in the prior art needs to be specially customized, has unsatisfactory versatility, low reuse rate, overly complex structure, tool opening size cannot be adaptively adjusted according to different types of suspension seats, and the static strength test tool has limited measuring points and a relatively complex structure through the simplest structure.

[0004] The technical solution adopted by the present invention is as follows: a static strength test mounting tool for a rail vehicle suspension seat, which has a left-side loading mechanism and a right-side loading mechanism with the same structure and left-right axisymmetric, and the left-side loading mechanism and the right-side loading mechanism are respectively fastened and installed on the left and right sides of a bottom plate by bolts, nuts and gaskets, and the bottom plate is made of a group of front-to-back parallel transverse channel steels I and a plurality of groups of left-to-right parallel longitudinal channel steels II, which are welded in an H-shaped criss-cross pattern, wherein the left and right sides of the side beams of the transverse channel steel I are respectively provided with axisymmetrically arranged positioning strip holes; the left-side loading mechanism is composed of a bottom connecting plate, a vertical channel steel III and a top mounting plate; the bottom connecting plate is provided with a positioning mounting hole, and the positioning mounting hole matches the corresponding positioning strip hole of the bottom plate up and down, and the outer side of the bottom connecting plate is vertically welded and fixedly connected to the bottom of the vertical channel steel III, and the top of the vertical channel steel III is vertically supported and fixedly connected to the horizontally arranged top mounting plate, and the vertical channel steel III and the top mounting plate form an inverted "L"-shaped leg structure, and the opening size of the left and right loading mechanisms of the tooling can be adaptively adjusted by adjusting the spacing of the left-right symmetrical inverted "L"-shaped legs.

[0005] In order to meet the loading requirements of the counterweight block, further: the bottom plate is paved with an iron floor that is convenient for loading the counterweight block; and the groove openings of the transverse channel steel I and the longitudinal channel steel II of the bottom plate are uniformly set downward.

[0006] In order to beautify the appearance of the equipment and ensure the hidden and reliable connection between the bottom connecting pieces of the left and right loading mechanisms and the bottom plate; at the same time, the left and right sides of the rail vehicle suspension seat can be clamped flatly through the vertical outer side walls of the vertical channel steel III12. Furthermore: the groove openings of the vertical channel steel III are uniformly set to face outward; and the external shape of the bottom connecting piece matches the groove shape of the vertical channel steel III, and the bottom connecting piece is completely included in the bottom end of the groove of the vertical channel steel III, and is vertically welded and fixed to the bottom end of the groove of the vertical channel steel III as a whole.

[0007] In order to further enhance the multi-point testing function of the inverted "L"-shaped leg of the tooling through the simplest structure, the high-strength support function of the leg of the tooling, and the clamping and mounting capacity of the symmetrical inverted "L"-shaped leg of the tooling, further: the left-side loading mechanism or the right-side loading mechanism respectively has two groups of bottom connecting plates, two groups of vertical channel steels III and one group of top mounting plates; the two groups of bottom connecting plates are respectively vertically fixedly connected to the two groups of vertical channel steels III, and the tops of every two groups of vertical channel steels III are simultaneously vertically fixedly supported and fixedly connected to a group of horizontally arranged top mounting plates, and every two groups of vertical channel steels III and one group of top mounting plates constitute a left-side loading mechanism or a right-side loading mechanism of a "door" type structure; and every two groups of bottom connecting plates are respectively fastened to the positioning long holes of the bottom plate through their own positioning mounting holes corresponding to each other, so as to adaptively adjust the opening size of the left and right loading mechanisms.

[0008] Preferably: the bolt and nut washers are M16 high-strength bolt and nut washers; the transverse channel steel Ⅰ, the longitudinal channel steel Ⅱ, and the vertical channel steel Ⅲ are all No. channel steels; there are at least eight groups of positioning long strip holes, and the hole length of each group of positioning long strip holes is greater than or equal to 150mm; the adjustable opening size of the left and right side loading mechanisms is greater than or equal to 1500mm.

[0009] The advantages of the present invention compared with the prior art are:

[0010] 1. This scheme inverts the "L"-shaped leg structure and cooperates with the "door"-shaped left and right side loading mechanisms. There is sufficient space for tooling measurement points, especially for the installation of horizontal static load cylinders or hydraulic cylinders. Vertical static load and lateral compression load tests can be carried out to test the allowable stress of the rail vehicle suspension seat. At the same time, the vertical bending stiffness of the suspension seat can also be measured. The tooling opening size adjustment is flexible and convenient, and the versatility is excellent.

[0011] 2. The main body of the tooling in this scheme is made of several No. 14 channel steels and metal plates. The vertical plane of the channel steel III 12 is used to clamp and mount the rail car suspension seat; the top mounting plate 13 can horizontally support the workpiece to be tested; the positioning long strip holes of the transverse channel steel I are used to realize the adaptive adjustment of the opening size of the left and right loading mechanisms 1 and 2; the overall structure of the tooling is simple, the versatility is ideal, the mounting support methods are diverse, and it is economical and practical;

[0012] 3. This scheme makes full use of the groove structure of the channel steel, wherein the groove of the channel steel III12 is used to hide the welded bottom connecting piece 11; the groove of the front and rear parallel transverse channel steel I41 is used to disassemble and install the bolts, nuts and gaskets 3. The structure is simple, the space is sufficient, the structural support strength is stable and reliable, and it is economical and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0014] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0015] Figure 3 For the present invention Figure 1 A schematic diagram of the bottom plate structure of an embodiment;

[0016] Figure 4 It is a structural schematic diagram of the left-side loading mechanism of the present invention;

[0017] Figure 5 for Figure 4 Left view of

[0018] Figure 6 for Figure 5 Schematic diagram of the C-direction structure of the middle bottom connecting piece;

[0019] Figure 7 for Figure 1 Schematic diagram of the usage status after the iron floor is installed and equipped with counterweight iron. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-7 Describe the specific embodiments of the present invention. It is worth to understand that the embodiments described below are only exemplary, and not specific limitations of the present invention.

[0021] The following examples are provided to facilitate a better understanding of the present invention, but are not intended to limit the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified. The test materials used in the following examples are commercially available unless otherwise specified. The pneumatic or hydraulic mechanisms associated with the tooling, the sensors connected to the pneumatic or hydraulic mechanisms, and the realization of the control circuits of the finite element analysis system electrical and circuits associated with the sensors omitted in the following examples are all conventional testing and control methods under the prior art.

[0022] In the present invention, unless otherwise specified, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "install", "connect", "connect", "set", "provided with", and "fixedly connected" should be understood in a broad sense. For example, fixed connection includes any one of welding, fastening connection, riveting, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The static strength test mounting tool for the rail vehicle suspension seat has a left loading mechanism 1 and a right loading mechanism 2 with the same structure and symmetrical left and right axes, and is characterized in that: the left loading mechanism 1 and the right loading mechanism 2 are respectively fastened and mounted on the left and right sides of the bottom plate 4 by bolts, nuts and washers 3, symmetrically (see Figure 1 The bottom plate 4 is made of a group of parallel transverse channel steels Ⅰ41 and a plurality of parallel longitudinal channel steels Ⅱ42 in an H-shaped crisscross welding, wherein the transverse channel steel Ⅰ41 has axisymmetrically arranged positioning strip holes 43 on both sides of the side beam (see Figure 3 Combination Figure 2 The left loading mechanism 1 is composed of a bottom connecting piece 11, a vertical channel steel III 12 and a top mounting plate 13 (see Figure 4 , combined with Figure 5 The bottom connecting piece 11 is provided with a positioning and mounting hole 111 (see Figure 6 Combination Figure 5 ), the positioning and mounting holes 111 match the positioning long holes 43 of the corresponding bottom plate 4 up and down (see again Figure 2), and the outer side of the bottom connecting piece 11 is vertically welded to the bottom of the vertical channel steel III12, and the top of the vertical channel steel III12 is vertically supported and fixed to the horizontally arranged top mounting plate 13, and the vertical channel steel III12 and the top mounting plate 13 form an inverted "L"-shaped leg structure. By adjusting the spacing of the left and right symmetrical inverted "L"-shaped legs, the opening size of the left and right loading mechanisms 1 and 2 of the tooling can be adaptively adjusted (combined with Figure 2 , see again Figure 1 ).

[0025] The working principle of the present invention is: according to the model and size of the rail vehicle suspension seat, loose Figure 1 The bolt, nut, and washer 3 in the tooling shown, and the left and right vertical channel steel III12 opening sizes of the left and right loading mechanisms (i.e., the left and right symmetrical inverted "L"-shaped legs) are adaptively adjusted according to the size of the suspension seat to be tested; first, the inverted "L"-shaped legs on one side of the bottom plate 4 are tightly fixed and installed using the bolt, nut, and washer 3; then the outer side of the railcar suspension seat is pressed against the inner side wall of the vertical channel steel III12 of the legs that have been tightened and installed on the same side; finally, the inner side wall of the vertical channel steel III12 of the inverted "L"-shaped legs on the other side is pressed against the outer side wall of the other side of the railcar suspension seat, and the outer side walls of the left and right sides of the railcar suspension seat are clamped between the left and right loading mechanisms 1 and 2 of the tooling, so as to clamp and fix the railcar frame suspension seat to be tested between the mounting tooling; at this point, the clamping of the workpiece to be tested on the tooling is completed. When starting the static strength test, the tooling can be used as a support, and the static load test mechanism can be started from different measuring points of the tooling to complete the static strength test of the allowable stress in the horizontal direction. In addition to this clamping method, the workpiece to be tested can also be mounted on a bilaterally symmetrical top mounting plate 13, and then the workpiece to be tested can be clamped and fixedly connected to the top mounting plate 13 using a fixture; thereby performing a static strength test of the allowable force in the vertical direction on the workpiece to be tested.

[0026] It should be noted that: the "door"-shaped gap of the tooling of the present invention can extend into or out of the pneumatic or hydraulic actuator within a certain height range; the top mounting plate 13 of the present invention mainly functions to be connected to the rail vehicle frame suspension seat support (such as a clamping connection method with the help of a U-shaped clamp); the vertical channel steel III12 mainly functions to support and bear the load, and cooperates with the top mounting plate 13 to meet the static strength test in the vertical direction and the horizontal direction (such as setting the suspension seat on the top mounting plate 13 to perform vertical strength tests); the bottom connecting plate 11 welded in the vertical channel steel III12 of the present invention mainly functions to improve the connection strength of the bolt, nut, and gasket 3 connecting the pull leg and the bottom plate, and to ensure the aesthetics of the hidden connection.

[0027] On this basis, in order to meet the loading requirements of the counterweight block, relying on the sufficient horizontal support space of the bottom plate 4, the counterweight iron (ie, the counterweight block 402) is neatly stacked on the bottom plate 4 according to the required number for counterweighting: further: (such as Figure 7(as shown) the bottom plate 4 is paved with an iron floor 401 which is convenient for loading the counterweight 402; specifically, the iron floor 401 is supported by the solid upper surface of the bottom plate 4 and is fixedly installed by welding the outer edge welding, and the iron floor 401 is used as the bearing surface of the counterweight 402. According to the quality requirements of the test outline, the number of 25kg counterweight iron (i.e., counterweight 402) converted into specifications of 250*120*150 is neatly stacked on the iron floor 401. The groove openings of the transverse channel steel Ⅰ41 and the longitudinal channel steel Ⅱ42 of the bottom plate 4 are uniformly set downward. At the same time, the outer side of the bottom connecting piece 11 is vertically welded to the bottom of the vertical channel steel Ⅲ12, and the bottom connecting piece 11 is provided with a positioning installation hole 111 (see Figure 6 Combination Figure 5 ), the positioning and mounting hole 111 matches the positioning long hole 43 of the corresponding base plate 4 up and down.

[0028] In order to beautify the appearance of the equipment and ensure the hidden and reliable connection between the bottom connecting pieces of the left and right loading mechanisms and the bottom plate 4; at the same time, the vertical outer side wall of the vertical channel steel III12 realizes the flat clamping function of the rail vehicle suspension seat, and further: the groove openings of the vertical channel steel III12 are uniformly set to the outside (such as Figure 1 and the outer shape of the bottom connecting piece 11 matches the groove shape of the vertical channel steel III 12 (as shown); Figure 6 As shown), the bottom connecting piece 11 is completely incorporated into the bottom end of the groove of the vertical channel steel III12, and is vertically welded and fixedly connected to the bottom end of the groove of the vertical channel steel III12 (combined with Figure 5 ).

[0029] In order to further improve the multi-point testing function of the inverted "L"-shaped leg of the tooling through the simplest structure, the high-strength support function of the leg of the tooling, and the clamping and mounting capacity of the symmetrical leg-pulling tooling, further: the left loading mechanism 1 or the right loading mechanism 2 respectively has two groups of bottom connecting pieces 11, two groups of vertical channel steels III 12 and a group of top mounting plates 13 (such as Figure 5 As shown); two groups of bottom connecting plates 11 are respectively vertically fixedly connected to two groups of vertical channel steels III12, and the tops of every two groups of vertical channel steels III12 are simultaneously vertically fixedly supported and fixedly connected to a group of horizontally arranged top mounting plates 13, and every two groups of vertical channel steels III12 and a group of top mounting plates 13 form a left loading mechanism 1 or a right loading mechanism 2 of a "door" type structure.

[0030] Based on the above embodiment, preferably: the bolt nut washer 3 is an M16 high-strength bolt nut washer; the transverse channel steel Ⅰ41, the longitudinal channel steel Ⅱ42, and the vertical channel steel Ⅲ12 are all No. 14 channel steels; the positioning strip holes 43 have at least eight groups, and the hole length of each group of positioning strip holes 43 is greater than or equal to 150mm; the adjustable opening size of the left and right side loading mechanisms 1, 2 is greater than or equal to 1500mm. Specifically, Figure 1-6 In the embodiment shown, the iron floor is paved with an iron floor of 300*2300*t3 Q235A to ensure the loading of the counterweight; the long holes are 8 groups of 17*150mm long holes; and the spacing between the long holes is 150mm, ensuring that the mounting tooling can be adjusted to any opening size within the range of 1500mm-2500mm.

[0031] Specifically, the width of the door-shaped gap between adjacent vertical channel steels III12 is greater than or equal to 230mm; the height of the vertical channel steel III12 is greater than or equal to 540mm; the horizontal plate length of the top mounting plate 13 is greater than or equal to 510mm, the width is greater than or equal to 140mm, and the thickness is greater than or equal to 20mm; the horizontal transverse length of the plate body of the bottom plate 4 is greater than or equal to 2500mm; the total width of the bottom plate 4 is greater than or equal to 510mm; and each two groups of bottom connecting pieces 11 are respectively fastened to the positioning strip holes 43 of the bottom plate 4 through their respective positioning mounting holes 111 to adaptively adjust the opening sizes of the left and right loading mechanisms 1 and 2 (such as Figure 1 , Figure 2 as shown).

[0032] From the above description, it can be found that: first, the inverted "L"-shaped leg pulling structure of the present invention cooperates with the "door"-shaped left and right side loading mechanisms, and there is sufficient space for tooling measurement points, especially sufficient installation space for the test horizontal static load cylinder or hydraulic cylinder; vertical static load and lateral compression load tests can be carried out to test the allowable stress of the rail vehicle suspension seat, and at the same time, the vertical bending stiffness of the suspension seat can also be measured; the tooling is smart and convenient, and has excellent versatility.

[0033] Secondly, the tooling body of the present invention is made of a number of No. 14 channel steels and metal plates, and the rail vehicle suspension seat is clamped and mounted by the clamping vertical plane of the channel steel III 12; the top mounting plate 13 is used to horizontally support the workpiece to be measured; the positioning long strip holes of the transverse channel steel I are used to realize the adaptive adjustment of the opening size of the left and right side loading mechanisms 1 and 2; the overall structure of the tooling is streamlined, the versatility is ideal, and it is economical and practical.

[0034] Furthermore, the present invention makes full use of the groove structure of the channel steel, wherein the groove of the channel steel III12 is used to hide the welded fixed bottom connecting plate 11; the groove of the front and rear parallel transverse channel steel I41 is used to disassemble and install the bolts, nuts and gaskets 3, the structure is streamlined, the mounting and test space are very sufficient, the structural support strength is stable and reliable, and it is economical and practical; it can meet the test requirements of more suspension seats, thereby solving the problem that the static strength test tooling of the vehicle body cannot be reused many times; not only that, the present invention has multiple groups of long holes, combined with the connection method of high-strength bolts, which are easy to disassemble, and can not only adjust the opening size of the mounting tooling according to the actual situation on site, but also can be equipped with installation holes (i.e., long holes) at any time according to the actual situation on site, to achieve size adjustment within multiple length ranges, so that it can adapt to the use of more rail vehicle suspension seat mounting tooling, reduce the design and manufacture of new tooling, and reduce manpower and material costs.

[0035] In summary, the mounting tool of the present invention adjusts the length of the tool opening size through the coordinated action of a simple bottom bolt connection and a long strip hole; it has a simple structure, is economical and practical, and can especially adapt to static strength tests of suspension seats of more models and sizes; the static strength test has multiple measuring points and sufficient space, which effectively improves the reuse rate of the vehicle body static strength test mounting tool; it saves manpower and material resources, can withstand a certain mass of counterweight loading, and is used to simulate and replace actual equipment to complete the test efficiently and reliably.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0038] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A static strength test mounting fixture for a rail vehicle suspension seat, comprising a left loading mechanism (1) and a right loading mechanism (2) of identical structure and symmetrical about the left and right axes, characterized in that: The left loading mechanism (1) and the right loading mechanism (2) are respectively fastened and installed on the left and right sides of the bottom plate (4) by bolts, nuts and washers (3) in an axisymmetric manner; the bottom plate (4) is made of a group of front-to-back parallel transverse channel steels I (41) and a plurality of groups of left-to-right parallel longitudinal channel steels II (42) welded in an H-shaped criss-cross pattern; the left and right sides of the side beam of the transverse channel steel I (41) are respectively provided with axisymmetrically arranged positioning long strip holes (43); the left loading mechanism (1) is composed of a bottom connecting plate (11), a vertical channel steel III (12) and a top mounting plate (13); the bottom connecting plate The plate (11) is provided with a positioning installation hole (111), the positioning installation hole (111) matches the positioning long strip hole (43) of the corresponding bottom plate (4) at the top and bottom, and the outer side of the bottom connecting plate (11) is vertically welded and fixedly connected to the bottom of the vertical channel steel III (12), and the top of the vertical channel steel III (12) is vertically supported and fixedly connected to the horizontally arranged top installation plate (13), and the top installation plate (13) and the vertical channel steel III (12) form an inverted "L"-shaped leg structure, and the opening size of the left and right loading mechanisms (1, 2) of the tooling can be adaptively adjusted by adjusting the spacing of the left and right symmetrical inverted "L"-shaped legs; The groove openings of the vertical channel steel III (12) are uniformly arranged to face outward; the outer shape of the bottom connecting piece (11) matches the shape of the groove of the vertical channel steel III (12), and the bottom connecting piece (11) is completely inserted into the bottom end of the groove of the vertical channel steel III (12), and is vertically welded and fixedly connected to the bottom end of the groove of the vertical channel steel III (12) as a whole; The left-side loading mechanism (1) or the right-side loading mechanism (2) respectively comprises two groups of bottom connecting plates (11), two groups of vertical channel steels III (12) and a group of top mounting plates (13); the two groups of bottom connecting plates (11) are respectively vertically fixedly connected to the two groups of vertical channel steels III (12); the tops of each two groups of vertical channel steels III (12) are simultaneously vertically fixedly supported and fixedly connected to a group of horizontally arranged top mounting plates (13); and each two groups of vertical channel steels III (12) and a group of top mounting plates (13) form a left-side loading mechanism (1) or a right-side loading mechanism (2) of a "door" type structure; and each two groups of bottom connecting plates (11) are respectively fastened and connected to the positioning strip holes (43) of the bottom plate (4) via their own positioning mounting holes (111) in a corresponding manner up and down, so as to adaptively adjust the opening sizes of the left-side and right-side loading mechanisms (1, 2).

2. The static strength test mounting tool for the rail vehicle suspension seat according to claim 1, characterized in that: The bottom plate (4) is paved with an iron floor (401) for facilitating loading of a counterweight (402); and the groove openings of the transverse channel steel I (41) and the longitudinal channel steel II (42) of the bottom plate (4) are all uniformly arranged to face downward.

3. The static strength test mounting tool for the rail vehicle suspension seat according to claim 1 or 2, characterized in that: The bolt and nut washers (3) are M16 high-strength bolt and nut washers; the transverse channel steel I (41), the longitudinal channel steel II (42), and the vertical channel steel III (12) are all No. 14 channel steels; the positioning long strip holes (43) have at least eight groups, and the hole length of each group of positioning long strip holes (43) is greater than or equal to 150 mm; the adjustable opening size of the left and right side loading mechanisms (1, 2) is greater than 1500 mm.

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