A multi-specification jack synchronous life experiment rapid positioning tool and system

Abstract

The utility model belongs to jack life experiment technical field especially relates to a kind of multi-specification jack synchronous life experiment quick positioning tool and system.The adjustable trunnion assembly of the positioning tool includes at least four pairs of different outer diameter bushings, anti-loosening baffle and anti-loosening pin, anti-loosening pin abuts against bushing and two ends are respectively set in two anti-loosening baffle.The system includes the load-bearing frame of jack test bench and two positioning tools, frame includes a pair of oppositely arranged loading beam, and the length direction of two positioning tools is consistent with the length direction of loading beam respectively detachably fixed in a loading beam.Thus, the positioning tool is replaced by adjustable trunnion assembly to realize quick replacement mechanism and adapt to multiple specifications of jack, and the system recombines the load-bearing frame of original jack test bench in combination with positioning tool, so that it is more compatible, increases experimental efficiency, and shortens experimental period.

Description

Technical Field

[0001] This utility model belongs to the field of jack life test technology, and in particular relates to a rapid positioning tooling and system for synchronous life test of multi-specification jacks. Background Technology

[0002] Currently, jack life tests in hydraulic support laboratories primarily employ a single-station testing mode, meaning each jack test bench can only hold one type of jack. During testing, for different jack sizes, the corresponding jack test bench frame needs to be replaced or the connecting trunnions need to be re-machined, with each replacement taking 2-3 days. A single jack requires one month to complete the life test (based on 45,000 cycles of loading), and testing four different jack sizes sequentially requires a total of four months.

[0003] However, the adaptation cost of the experimental platform frame is high (approximately 5,000 yuan per modification). If a new jack experimental platform is used, the old jack experimental platform frame will be left idle, resulting in a waste of resources. Moreover, the operation is cumbersome. The loading parameters need to be recalibrated after each jack change. The experimental conditions for different specifications of jacks are different (such as loading rate and ambient temperature fluctuations), resulting in poor data synchronization and reduced comparability of experimental data. The single-station experimental mode requires that multiple specifications of jacks be tested one by one, resulting in extremely low experimental efficiency and seriously restricting the research and development progress. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a rapid positioning fixture and system for synchronous life test of multi-specification jacks, thereby solving the technical problems of low efficiency, poor data synchronization, poor compatibility and low utilization rate of the experimental platform frame in the prior art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] On one hand, this utility model embodiment provides a rapid positioning fixture for synchronous life testing of multi-specification jacks, including a first support base and a second support base. The first support base is used to connect to the fixed end of the jack to be tested, and the second support base is used to slide to connect with the telescopic end of the jack. The first support base includes a first base plate and a pair of first vertical plates fixedly disposed thereon, with a limiting space provided in the first vertical plate. It also includes a first positioning shaft that is simultaneously inserted through the fixed end trunnion and the two limiting spaces and supported by the first support base. It also includes an adjustable trunnion assembly, which includes at least four pairs of bushings with different outer diameters, anti-loosening baffles and anti-loosening pins. Each pair of bushings is used to abut against both sides of the fixed end trunnion. The bushings are sleeved on the outside of the first positioning shaft and are inserted therein with a clearance fit with the limiting space. Two anti-loosening baffles are fixed on the outside of each of the two first vertical plates. The anti-loosening pins abut against the bushings and are respectively inserted through the two anti-loosening baffles at both ends.

[0009] Furthermore, the second support base includes a second base plate and a pair of second vertical plates fixedly mounted thereon, with elongated holes parallel to the second base plate in the second vertical plates; it also includes a second positioning shaft that passes through the telescopic end trunnion and the two elongated holes and supports the second support base; and it also includes a pair of sliders that abut against both sides of the telescopic end trunnion, with the sliders sleeved on the outside of the second positioning shaft and passing through the elongated holes so that the telescopic end can slide between the two second vertical plates.

[0010] Furthermore, multiple bolt holes are provided at both the front and rear ends of the first and second base plates, arranged in a row, with bolts inserted from bottom to top inside the bolt holes to fix the first and second support bases to the jack test platform.

[0011] Furthermore, the first vertical plate is connected to the first bottom plate and the second vertical plate is connected to the second bottom plate using CO2 gas shielded welding.

[0012] Furthermore, the bushing is made of 40Cr material.

[0013] On the other hand, this utility model also provides a multi-specification jack synchronous life test system, including a load-bearing frame of the jack test platform and two positioning fixtures. The frame includes a pair of loading beams arranged opposite each other. The length direction of the two positioning fixtures is consistent with the length direction of the loading beams and they can be detachably fixed to one loading beam. Multiple equidistant T-slots are opened on the loading beams. The horizontal groove of the T-slot is located below the vertical groove and the T-slot extends along the length direction perpendicular to the loading beam. The first base plate and the second base plate are fixed to the loading beam by multiple bolts embedded in the T-slots and locked.

[0014] Furthermore, the frame also includes a sliding beam and two crossbeams. The sliding beam is slidably disposed between the two loading beams perpendicularly to the loading beam, and the two crossbeams are fixedly disposed at both ends of the two loading beams perpendicularly to the loading beam. The sliding beam, the two loading beams, and the two crossbeams form two experimental slots, each of which can accommodate a jack to be tested. A pair of first fixed lugs are provided on the inner side of each of the two crossbeams, and a pair of second fixed lugs are provided on both sides of the sliding beam. The pair of first fixed lugs are used for detachable connection with the fixed end of the jack, and the pair of second fixed lugs are used for detachable connection with the movable end of the jack.

[0015] Furthermore, a power source is installed on the jacks inside the experimental tank. The power source is connected to the jacks on the positioning fixture through a diversion valve so that all the jacks to be tested in the system can share a single power source.

[0016] Furthermore, two pairs of first fixed lugs and two pairs of second fixed lugs are arranged on the same straight line, and the two quick positioning fixtures are symmetrically distributed relative to the experimental tank.

[0017] Furthermore, both ends of the sliding beam are provided with first vertical through holes, and the loading beam is provided with multiple second vertical through holes. The positioning pin is inserted into one first vertical through hole and one second vertical through hole to position the sliding beam.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are:

[0020] This invention discloses a rapid positioning fixture and system for synchronous life testing of multi-specification jacks. The positioning fixture features an adjustable trunnion assembly on the first support base. This assembly includes at least four pairs of bushings with different outer diameters, anti-loosening baffles, and anti-loosening pins. Each pair of bushings abuts against both sides of the fixed-end trunnion. The bushings are fitted onto the outside of the first positioning shaft and pass through it with a clearance fit to the limiting space. Two anti-loosening baffles are fixed to the outside of each of the two first vertical plates. The anti-loosening pins abut against the bushings and pass through the two anti-loosening baffles at both ends. Compared to existing technologies, this invention reduces the time required to change positioning fixtures and improves the ease of operation when changing jacks of different specifications.

[0021] The system integrates positioning fixtures into the existing jack test bench's load-bearing frame, and the position of these fixtures can be adjusted according to the jack specifications. Compared to existing technologies, this allows for simultaneous testing of multiple jack specifications by changing different bushings using the positioning fixtures. This eliminates the need to replace the entire frame, shortening the lifespan testing cycle for jacks of different specifications. Furthermore, consistent environmental conditions and loading parameters significantly reduce data synchronization errors, providing accurate data for comparative analysis of jack lifespan. The system also boasts strong compatibility, reducing modification costs, minimizing the waste of idle load-bearing frames on the jack test bench, and saving on the cost of purchasing new load-bearing frames for jack test benches. Attached Figure Description

[0022] Figure 1 A schematic diagram of the rapid positioning fixture for synchronous life testing of multi-specification jacks;

[0023] Figure 2 This is a schematic diagram of the first type of structure where the first support base and the jack are combined.

[0024] Figure 3 This is a partial exploded view of the second type of first support base and jack assembly.

[0025] Figure 4 A schematic diagram of a multi-specification jack synchronous life test system in which the positioning fixtures and the jacks in the test tank are positioned on the same side of the sliding beam.

[0026] Figure 5 A schematic diagram of a multi-specification jack synchronous life test system with jacks positioned on both sides of a sliding beam for positioning fixtures and jacks in the test chamber.

[0027] [Explanation of Labels in the Attached Image]

[0028] 1: Frame; 11: Loading beam; 111: T-slot; 112: Second vertical through hole; 12: Sliding beam; 13: Crossbeam; 14: Experimental groove;

[0029] 2: Positioning fixture; 21: First support seat; 211: First base plate; 212: First vertical plate; 2121: Limiting space; 22: Second support seat; 221: Second base plate; 222: Second vertical plate; 2221: Oblong hole; 23: First positioning shaft; 24: Adjustable trunnion assembly; 241: Bushing; 2411: Through hole; 242: Anti-loosening baffle; 243: Anti-loosening pin; 25: Second positioning shaft; 26: Slider; 27: Bolt hole;

[0030] 3: Jack; 31: Fixed end trunnion; 32: Telescopic end trunnion;

[0031] 4: First fixing ear plate; 5: Second fixing ear plate; 6: Positioning pin. Detailed Implementation

[0032] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1-3 As shown, this utility model provides a rapid positioning fixture for synchronous life testing of multi-specification jacks, including a first support base 21, a second support base 22, a first positioning shaft 23, an adjustable trunnion assembly 24, a second positioning shaft 25, and a pair of sliders 26. The first support base 21 is used to connect with the fixed end of the jack 3 to be tested, and the second support base 22 is used to slide with the telescopic end of the jack 3 to be tested. The first support base 21 and the second support base 22 enable the jack 3 to be tested to be suspended and locked. During installation of the positioning fixture 2, the positioning error of the first support base 21 and the second support base 22 is calibrated by laser to ≤0.1mm / m to ensure that the loading axes are parallel to meet the requirements of the jack loading test.

[0034] The first support base 21 includes a first base plate 211 and a pair of first vertical plates 212 fixedly disposed thereon. Preferably, the first vertical plates 212 are connected to the first base plate 211 by CO2 gas shielded welding. A limiting space 2121 is provided in the first vertical plate 212, such as... Figure 1-2 As shown, the limiting space 2121 can be a groove, such as... Figure 3 As shown, the limiting space 2121 can also be a through hole.

[0035] When the jack 3 is installed on the positioning fixture 2, the fixed end trunnion 31 is located between the two first vertical plates 212, and the first positioning shaft 23 passes through the fixed end trunnion 31 and the two limiting spaces 2121 and is supported by the first support seat 21.

[0036] The positioning fixture 2 utilizes an adjustable trunnion assembly 24 to enable a quick-change mechanism. The adjustable trunnion assembly 24 includes at least four pairs of bushings 241 with different outer diameters, anti-loosening baffles 242, and anti-loosening pins 243. By replacing the bushings 241, different sizes of jacks 3 can be fitted to their fixed ends, allowing different jacks 3 to be secured onto the corresponding positioning fixture 2. During installation, each pair of bushings 241 abuts against both sides of the fixed-end trunnion 31. The bushings 241 are fitted onto the outside of the first positioning shaft 23 and pass through the limiting space 2121 with a clearance fit. The bushing 241 has multiple radial through holes 2411. Two anti-loosening baffles 242 are fixed to the outer sides of each of the two first vertical plates 212. When the bushing 241 protrudes from the first vertical plate 212, the middle of the anti-loosening pin 243 passes through the through hole 2411 of the bushing 241, and both ends pass through the two anti-loosening baffles 242 respectively, axially fixing the bushing 241. When the bushing 241 is embedded in the first vertical plate 212, the middle of the anti-loosening pin 243 abuts against the outer end of the bushing 241, and both ends pass through the two anti-loosening baffles 242 respectively, axially fixing the bushing 241. The adjustable trunnion assembly 24 allows for a replacement time of ≤5 minutes.

[0037] Preferably, the bushing 241 is made of 40Cr with a hardness of HRC45-50.

[0038] The second support 22 includes a second base plate 221 and a pair of second vertical plates 222 fixedly mounted thereon. Preferably, the second vertical plates 222 are connected to the second base plate 221 by CO2 gas shielded welding. The second vertical plates 222 have elongated holes 2221 parallel to the second base plate 221.

[0039] When the jack 3 is installed on the positioning fixture 2, the telescopic end trunnion 32 is located between the two second vertical plates 222, and the second positioning shaft 25 is simultaneously inserted through the telescopic end trunnion 32 and the two elongated holes 2221 and supported on the second support base 22.

[0040] A pair of sliders 26 abut against both sides of the telescopic end trunnion 32. The sliders 26 are sleeved on the outside of the second positioning shaft 25 and pass through the elongated hole 2221 so that the telescopic end can slide between the two second vertical plates 222.

[0041] In order to make the distance between the first support 21 and the second support 22 adjustable according to the length of the jack, the first base plate 211 and the second base plate 221 are designed to be detachable.

[0042] Specifically, multiple bolt holes 27 are provided at both the front and rear ends of the first base plate 211 and the second base plate 221. The multiple bolt holes 27 are arranged in a row, and bolts passing through from bottom to top are fitted into the bolt holes 27 to fix the first support 21 and the second support 22 to the jack test platform.

[0043] Example 1

[0044] like Figure 4 As shown, this utility model also provides a multi-specification jack synchronous life test system, including a load-bearing frame 1 of a jack test platform and two positioning fixtures 2. The load-bearing frame 1 of the jack test platform is a reused version of the original jack test platform's load-bearing frame 1. The frame 1 includes a pair of oppositely arranged loading beams 11. The length direction of the two positioning fixtures 2 is consistent with the length direction of the loading beams 11, and they are detachably fixed to one loading beam 11. Multiple equidistant T-slots 111 are formed on the loading beams 11. The horizontal grooves of the T-slots 111 are located below the vertical grooves, and the T-slots 111 extend along a length direction perpendicular to the loading beams 11. A first base plate 211 and a second base plate 221 are embedded in the T-slots 111 and locked with multiple bolts thereon, fixing the first support 21 and the second support 22 to the loading beams 11.

[0045] The frame 1 also includes a sliding beam 12 and two crossbeams 13. The sliding beam 12 is slidably disposed between the two loading beams 11 and the loading beam 11. The two crossbeams 13 are fixedly disposed at both ends of the two loading beams 11 and the loading beam 11. The sliding beam 12, the two loading beams 11 and the two crossbeams 13 form two experimental slots 14. Each experimental slot 14 can be equipped with a jack 3 to be tested.

[0046] A pair of first fixed lugs 4 are provided on the inner side of both crossbeams 13, and a pair of second fixed lugs 5 are provided on both sides of the sliding beam 12. The pair of first fixed lugs 4 are used to detachably connect with the fixed end of the jack 3, and the pair of second fixed lugs 5 are used to detachably connect with the movable end of the jack 3.

[0047] When the length of the cylinder of the jack 3 in the experimental tank 14 is greater than the length of the jack 3 when the piston rod of the jack 3 in the two positioning fixtures 2 is extended to the maximum stroke, the two positioning fixtures 2 and the jack 3 in the experimental tank 14 are set on the same side of the sliding beam 12.

[0048] A power source is installed on the jack 3 in the experimental tank 14. This power source is the power source of the original jack test platform. The power source is connected to the jack 3 on the positioning fixture 2 through a diversion valve so that all the jacks 3 to be tested in the system can share a power source for synchronous loading of jacks of 3 different specifications, so as to ensure the standard uniformity of multi-specification synchronous experiments.

[0049] Preferably, the two pairs of first fixed ear plates 4 and the two pairs of second fixed ear plates 5 are arranged on the same straight line, and the two quick positioning fixtures 2 are symmetrically distributed relative to the experimental tank 14.

[0050] In addition, both ends of the sliding beam 12 are provided with first vertical through holes, and the loading beam 11 is provided with multiple second vertical through holes 112. The positioning pin 6 is inserted into one first vertical through hole and one second vertical through hole 112 at the same time to position the sliding beam 12.

[0051] Example 2

[0052] like Figure 5 As shown, this utility model also provides a multi-specification jack synchronous life test system, including a load-bearing frame 1 of a jack test platform and two positioning fixtures 2. The load-bearing frame 1 of the jack test platform is a reuse of the original load-bearing frame 1 of the jack test platform. The frame 1 includes a pair of oppositely arranged loading beams 11. The length direction of the two positioning fixtures 2 is consistent with the length direction of the loading beams 11, and they are detachably fixed to one loading beam 11. Multiple equidistant T-slots 111 are opened on the loading beams 11. The horizontal groove of the T-slot 111 is located below the vertical groove, and the T-slot 111 extends along the length direction perpendicular to the loading beam 11. The first base plate 211 and the second base plate 221 are embedded in the T-slots 111 and locked by multiple bolts on them, fixing the first support seat 21 and the second support seat 22 to the loading beam 11.

[0053] The frame 1 also includes a sliding beam 12 and two crossbeams 13. The sliding beam 12 is slidably disposed between the two loading beams 11 and the loading beam 11. The two crossbeams 13 are fixedly disposed at both ends of the two loading beams 11 and the loading beam 11. The sliding beam 12, the two loading beams 11 and the two crossbeams 13 form two experimental slots 14. Each experimental slot 14 can be equipped with a jack 3 to be tested.

[0054] A pair of first fixed lugs 4 are provided on the inner side of both crossbeams 13, and a pair of second fixed lugs 5 are provided on both sides of the sliding beam 12. The pair of first fixed lugs 4 are used to detachably connect with the fixed end of the jack 3, and the pair of second fixed lugs 5 are used to detachably connect with the movable end of the jack 3.

[0055] When the piston rod of the jack 3 in the experimental tank 14 extends to its maximum stroke, the length of the loading beam 11 on both sides of the other experimental tank 14 is greater than the length of the jack when the piston rod of the jack 3 in the two positioning fixtures 2 extends to its maximum stroke. The two positioning fixtures 2 and the jack 3 in the experimental tank 14 are set on both sides of the sliding beam 12.

[0056] A power source is installed on the jack 3 in the experimental tank 14. This power source is the power source of the original jack test platform. The power source is connected to the jack 3 on the positioning fixture 2 through a diversion valve so that all the jacks 3 to be tested in the system can share a power source for synchronous loading of jacks of 3 different specifications, so as to ensure the standard uniformity of multi-specification synchronous experiments.

[0057] Preferably, the two pairs of first fixed ear plates 4 and the two pairs of second fixed ear plates 5 are arranged on the same straight line, and the two quick positioning fixtures 2 are symmetrically distributed relative to the experimental tank 14.

[0058] In addition, both ends of the sliding beam 12 are provided with first vertical through holes, and the loading beam 11 is provided with multiple second vertical through holes 112. The positioning pin 6 is inserted into one first vertical through hole and one second vertical through hole 112 at the same time to position the sliding beam 12.

[0059] It should be noted that the term "jack 3" mentioned in this application is a general term for all jacks to be tested.

[0060] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0062] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0063] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rapid positioning fixture for synchronous life testing of multi-specification jacks, characterized in that, It includes a first support base (21) and a second support base (22). The first support base (21) is used to connect with the fixed end of the jack (3) to be tested, and the second support base (22) is used to slide with the telescopic end of the jack (3). The first support base (21) includes a first base plate (211) and a pair of first vertical plates (212) fixedly disposed thereon, wherein a limiting space (2121) is provided in the first vertical plate (212); It also includes a first positioning shaft (23) that is simultaneously inserted through the fixed end trunnion (31) and the two limiting spaces (2121) and supported on the first support base (21); It also includes an adjustable trunnion assembly (24), which includes at least four pairs of bushings (241) with different outer diameters, anti-loosening baffles (242) and anti-loosening pins (243). Each pair of bushings (241) is used to abut against both sides of the fixed end trunnion (31). The bushings (241) are sleeved on the outside of the first positioning shaft (23) and pass through the limiting space (2121) with a clearance fit. Two anti-loosening baffles (242) are fixed on the outside of the two first vertical plates (212). The anti-loosening pins (243) abut against the bushings (241) and pass through the two anti-loosening baffles (242) at both ends respectively.

2. The rapid positioning fixture for synchronous life testing of multi-specification jacks according to claim 1, characterized in that, The second support base (22) includes a second base plate (221) and a pair of second vertical plates (222) fixedly disposed thereon. The second vertical plates (222) have elongated holes (2221) parallel to the second base plate (221). It also includes a second positioning shaft (25) that is simultaneously inserted through the telescopic end trunnion (32) and the two elongated holes (2221) and supported on the second support base (22); It also includes a pair of sliders (26), which are used to abut against both sides of the telescopic end trunnion (32). The sliders (26) are sleeved on the outside of the second positioning shaft (25) and pass through the elongated hole (2221) so that the telescopic end can slide between the two second vertical plates (222).

3. The rapid positioning fixture for synchronous life testing of multi-specification jacks according to claim 2, characterized in that, The first base plate (211) and the second base plate (221) are provided with multiple bolt holes (27) at both ends. The multiple bolt holes (27) are arranged in a row. Bolts that pass through from bottom to top are fitted in the bolt holes (27) to fix the first support base (21) and the second support base (22) to the jack test platform.

4. The rapid positioning fixture for synchronous life testing of multi-specification jacks according to claim 2, characterized in that, The first vertical plate (212) is connected to the first bottom plate (211) and the second vertical plate (222) is connected to the second bottom plate (221) by CO2 gas shielded welding.

5. The rapid positioning fixture for synchronous life testing of multi-specification jacks according to claim 1, characterized in that, The bushing (241) is made of 40Cr material.

6. A multi-specification jack synchronous life test system, characterized in that, The jack test bench includes a load-bearing frame (1) and two positioning fixtures (2) as described in any one of claims 1-5. The frame (1) includes a pair of oppositely arranged loading beams (11). The length direction of the two positioning fixtures (2) is consistent with the length direction of the loading beams (11) and they are detachably fixed to one of the loading beams (11). The loading beams (11) have multiple equidistant T-slots (111). The horizontal slots of the T-slots (111) are located below the vertical slots and the T-slots (111) extend along the length direction perpendicular to the loading beams (11). The first base plate (211) and the second base plate (221) are embedded in the T-slots (111) and locked by multiple bolts thereon to fix the first support seat (21) and the second support seat (22) to the loading beams (11).

7. The multi-specification jack synchronous life test system according to claim 6, characterized in that, The frame (1) also includes a sliding beam (12) and two cross beams (13). The sliding beam (12) is slidably disposed between the two loading beams (11) and the loading beam (11). The two cross beams (13) are fixedly disposed at both ends of the two loading beams (11) and the loading beams (11). The sliding beam (12), the two loading beams (11) and the two cross beams (13) form two experimental slots (14). Each experimental slot (14) can be equipped with a jack (3) to be tested. A pair of first fixed lugs (4) are provided on the inner side of both crossbeams (13), and a pair of second fixed lugs (5) are provided on both sides of the sliding beam (12). The pair of first fixed lugs (4) are detachably connected to the fixed end of the jack (3), and the pair of second fixed lugs (5) are detachably connected to the movable end of the jack (3).

8. The multi-specification jack synchronous life test system according to claim 7, characterized in that, The jacks (3) in the experimental tank (14) are equipped with a power source. The power source is connected to the jacks (3) on the positioning fixture (2) through a diversion valve so that all the jacks (3) to be tested in the system share a power source.

9. The multi-specification jack synchronous life test system according to claim 7, characterized in that, Two pairs of first fixed ear plates (4) and two pairs of second fixed ear plates (5) are arranged on the same straight line, and the two quick positioning fixtures (2) are symmetrically distributed relative to the experimental groove (14).

10. The multi-specification jack synchronous life test system according to claim 7, characterized in that, Both ends of the sliding beam (12) are provided with first vertical through holes, and the loading beam (11) is provided with multiple second vertical through holes (112). The positioning pin (6) is inserted into one of the first vertical through holes and one of the second vertical through holes (112) to position the sliding beam (12).

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