Two-degree-of-freedom simulation test platform

Abstract

The invention belongs to the technical field of simulation testing, and discloses a two-degree-of-freedom simulation testing platform which comprises a base. The central pillar is fixedly mounted in the middle of the top end of the base and provided with a support ring in the middle; the supporting platform is spherically connected to the top of the central supporting column in a sleeving manner; the driving hydraulic cylinder is universally hinged to one side between the supporting platform and the base; according to the technical scheme, the balance supporting mechanisms and the shielding assembly are arranged, the communication effect between the balance supporting mechanisms is kept through operation of the shielding assembly, and when the driving hydraulic cylinder operates to drive a product on the top of the center supporting column to conduct analogue simulation, leakage occurs in the driving hydraulic cylinder or the output end is broken; when the supporting platform is not supported, the supporting platform loses support of a single driving hydraulic cylinder or two driving hydraulic cylinders, then the balance supporting mechanism can conduct auxiliary supporting balance on the two sides of a single support or conduct horizontal balance supporting on the whole supporting platform, and the situation that the product falls off when the supporting is lost is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of simulation testing, in particular to a two-degree-of-freedom simulation testing platform. Background Art

[0002] The two-degree-of-freedom simulation test platform is a test equipment widely used in multiple fields. It can simulate the movement of two degrees of freedom and provide users with a realistic simulation environment. The main principle is to realize the movement simulation of the platform in two directions through a specific mechanical structure and drive system. This platform is usually used to test, verify or simulate the dynamic response of two degrees of freedom in actual systems.

[0003] The existing two-degree-of-freedom simulation test platform can complete two-degree-of-freedom simulation movement by operating and retracting two hydraulic cylinders. However, when the two hydraulic cylinders leak internally or the telescopic rods break during use, one side of the platform or the entire platform will lose support, causing the entire platform to tilt unexpectedly, causing the product being tested on the top to fall and be damaged. Therefore, it needs to be improved. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a two-degree-of-freedom simulation test platform, which has the advantage of providing emergency balancing support when one side of the platform or the entire platform loses support.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a two-degree-of-freedom simulation test platform, comprising a base; a central pillar, fixedly installed in the middle of the top of the base, and a support ring is arranged in the middle; a support platform, spherically sleeved on the top of the central pillar; a driving hydraulic cylinder, universally hinged on one side between the support platform and the base; a balancing support mechanism comprising a hydraulic cylinder, the hydraulic cylinder is spherically sleeved on the top of the support ring, the balancing support piston rod is movably installed in the inner cavity of the hydraulic cylinder, and the top is spherically sleeved with the bottom of the support platform, the bottom of the balancing support piston rod is elastically connected to the inner cavity of the hydraulic cylinder through a power spring, and a flow assembly is arranged inside the central pillar, and both sides are fixedly connected to the top of the hydraulic cylinder.

[0006] Preferably, the circulation component includes an oil-passing cylindrical box and an oil-passing pipe;

[0007] The oil cylindrical box is arranged above and below the middle of the central pillar. The outer side of the oil cylindrical box is fixedly connected with the inner side of the top of the hydraulic cylinder through an oil pipe. The oil pipe is designed with rubber.

[0008] Preferably, a wear-reducing assembly is provided on the top of the hydraulic cylinder, and the wear-reducing assembly includes a ball, a telescopic bellows and a return valve;

[0009] The ball is movably sleeved on the top of the inner cavity of the hydraulic cylinder, the telescopic bellows is arranged between the top of the hydraulic cylinder and the top surface of the balance support piston rod, and the outer bottom of the telescopic bellows is fixedly connected to the outer side of the top of the hydraulic cylinder through a reflux valve.

[0010] Preferably, the number of the telescopic bellows is four, and the four telescopic bellows are made of polyvinyl chloride.

[0011] Preferably, the reflux valve comprises a reflux pipe, a one-way valve column, a connecting spring and a blocking ring;

[0012] The outer side of the bottom of the telescopic bellows is fixedly connected to the outer side of the top of the hydraulic cylinder through a return pipe, the one-way valve column is movably installed at the bottom of the outer side of the return pipe, the bottom of the one-way valve column is elastically connected to the inner cavity of the return pipe through a connecting spring, and the blocking ring is fixedly installed inside the return pipe and is located above the return pipe.

[0013] Preferably, a shielding assembly is provided on the outer side of the bottom of the oil-passing cylindrical box, and the shielding assembly includes a pneumatic cylinder, a shielding frame and a through hole;

[0014] The pneumatic cylinder is arranged inside the central pillar and below the oil-passing cylindrical box. The shielding frame is arranged on the top of the pneumatic cylinder and extends on both sides to the outside of the oil-passing cylindrical box. The through hole is opened at the top of the outer end of the shielding frame.

[0015] Preferably, the diameter of the through hole matches the diameter of the inner cavity of the oil pipe.

[0016] Preferably, a protective shell located outside the middle of the oil pipe is provided on the outside of the central pillar, a determination mechanism is provided in the middle of the inner cavity of the oil cylindrical box, and the outer end of the determination mechanism extends to the inside of the protective shell, and the determination mechanism includes a driven impeller rod, a baffle, a driving wheel, a pressing assembly and a pressure sensor;

[0017] The driven impeller rod is movably sleeved in the middle of the inner cavity of the oil-passing cylindrical box, the baffle is arranged inside the oil-passing cylindrical box and is located above and below the outer side of the driven impeller rod, the driving wheel is fixedly sleeved on the outer end of the driven impeller rod and is located inside the protective shell, the pressing assembly is arranged inside the protective shell and is located below the driving wheel, and a pressure sensor is arranged inside the protective shell and is located below the pressing assembly.

[0018] Preferably, the pressing assembly is fixedly mounted on the pressing assembly and includes a pressing member, a limiting column and a buffer spring;

[0019] The pressing piece is movably installed inside the support ring and is located below the driving wheel. The limiting columns are arranged inside the support ring and are located inside the two sides of the pressing piece. The pressing piece is elastically connected to the inside of the support ring through a buffer spring.

[0020] Preferably, the surface of the limiting column is movably connected to the inner wall of the buffer spring.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The above technical solution sets up a balancing support mechanism and a shielding component, and maintains the connectivity between the balancing support mechanisms through the operation of the shielding component. When the driving hydraulic cylinder runs to drive the product on the top of the central pillar for simulation, when leakage occurs inside the driving hydraulic cylinder or the output end is broken, the support platform will lose the support of a single driving hydraulic cylinder or two driving hydraulic cylinders. The balancing support mechanism can then provide auxiliary support and balance on both sides of a single support or provide horizontal balancing support for the entire support platform to prevent the product from falling when the support is lost.

[0023] The present invention arranges a wear-reducing component. When the supporting platform as a whole is driven by the driving hydraulic cylinder for simulation, the output end of the balancing support mechanism will slide up and down, and the bottom part of the wear-reducing component can convert the sliding friction between the output end surface and the inner wall of the cylinder into rolling friction, thereby effectively reducing wear and increasing the service life. When the balancing support mechanism is reset, the hydraulic oil entering the inner cavity above the wear-reducing component will be guided back to the inside of the balancing support mechanism.

[0024] The present invention sets a judgment mechanism, and when a single driving hydraulic cylinder or two driving hydraulic cylinders release the support for the supporting platform, a single balancing support mechanism or all the balancing support mechanisms as a whole will be quickly reset, so that the hydraulic oil on the inside will flow quickly, so as to push the inner end part of the judgment mechanism to rotate quickly, and then quickly transmit the pressure to the output to the control end, reminding the operator that the pressure changes rapidly, judging that the driving hydraulic cylinder is damaged, and finally driving the shielding component to interrupt both sides of the middle of the balancing support mechanism, thereby improving the balanced support of the balancing support mechanism to the driving hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0027] Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0028] Figure 4 for Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0029] Figure 5 It is a side cross-sectional structural schematic diagram of the present invention;

[0030] Figure 6 for Figure 5 A schematic diagram of the local enlarged structure at C in the middle;

[0031] Figure 7 It is a schematic diagram of the structure of the telescopic bellows of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the shielding assembly of the present invention;

[0033] Fig. 9 for Figure 8 Schematic diagram of the local enlarged structure at point D in the middle.

[0034] In the figure: 1, base; 2, center pillar; 3, support platform; 4, driving hydraulic cylinder; 5, balance support mechanism; 501, hydraulic cylinder; 502, balance support piston rod; 503, power spring; 504, circulation assembly; 5041, oil cylinder box; 5042, oil pipe; 6, wear reduction assembly; 601, ball; 602, telescopic bellows; 603, return valve; 6031, return pipe; 6032, One-way valve column; 6033, connecting spring; 6034, blocking ring; 7, shielding assembly; 701, pneumatic cylinder; 702, shielding frame; 703, through hole; 8, determination mechanism; 801, driven impeller rod; 802, baffle; 803, driving wheel; 804, pressing assembly; 8041, pressing piece; 8042, limiting column; 8043, buffer spring; 805, pressure sensor; 9, support ring; 10, protective shell. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figures 1 to 9As shown, the present invention provides a two-degree-of-freedom simulation test platform, including a base 1; a central pillar 2, fixedly installed in the middle of the top of the base 1, and a support ring 9 is arranged in the middle; a support platform 3, spherically sleeved on the top of the central pillar 2; a driving hydraulic cylinder 4, universally hinged on one side between the support platform 3 and the base 1; a balancing support mechanism 5 includes a hydraulic cylinder 501, the hydraulic cylinder 501 is spherically sleeved on the top of the support ring 9, a balancing support piston rod 502 is movably installed in the inner cavity of the hydraulic cylinder 501, and the top is spherically sleeved with the bottom of the support platform 3, the bottom of the balancing support piston rod 502 is elastically connected to the inner cavity of the hydraulic cylinder 501 through a power spring 503, and a circulation component 504 is arranged inside the central pillar 2, and both sides are fixedly connected with the top of the hydraulic cylinder 501.

[0037] When a single driving hydraulic cylinder 4 or two driving hydraulic cylinders 4 are damaged and lose their supporting function on the supporting platform 3 , the elastic force of the power spring 503 can be released, which can drive the balancing support piston rod 502 to move up and down to provide balanced support for the bottom of the supporting platform 3 .

[0038] like Figure 6 and Figure 7 As shown, the circulation component 504 includes an oil-passing cylindrical box 5041 and an oil-passing pipe 5042;

[0039] The oil cylindrical box 5041 is arranged above and below the middle of the central pillar 2. The outer side of the oil cylindrical box 5041 is fixedly connected with the inner side of the top of the hydraulic cylinder 501 through the oil pipe 5042. The oil pipe 5042 is designed with rubber.

[0040] By adopting the above solution, the oil pipe 5042 has a deformable ability, so that the hydraulic cylinder 501 as a whole can smoothly deflect.

[0041] like Figure 3 As shown, a wear reduction assembly 6 is disposed on the top of the hydraulic cylinder 501, and the wear reduction assembly 6 includes a ball 601, a telescopic bellows 602 and a return valve 603;

[0042] The ball 601 is movably sleeved on the top of the inner cavity of the hydraulic cylinder 501, and the telescopic bellows 602 is arranged between the top of the hydraulic cylinder 501 and the top surface of the balance support piston rod 502. The bottom of the outer side of the telescopic bellows 602 is fixedly connected to the outer side of the top of the hydraulic cylinder 501 through the return valve 603.

[0043] By adopting the above solution: by providing the ball 601, when the balancing support piston rod 502 moves up and down as a whole, it will contact the ball 601, and the sliding friction between the balancing support piston rod 502 and the top of the hydraulic cylinder 501 can be converted into rolling friction, which can reduce the wear on the surface of the balancing support piston rod 502.

[0044] like Figure 3 As shown, there are four telescopic bellows 602 , and the four telescopic bellows 602 are made of polyvinyl chloride.

[0045] The above solution is adopted: through the design of the telescopic bellows 602, the hydraulic oil leaking between the top of the hydraulic cylinder 501 and the balance support piston rod 502 can be collected and blocked, and the interior of the telescopic bellows 602 is filled with gas, which will cause the oil body to exist at the bottom and can be compressed to flow back into the hydraulic cylinder 501 through the return valve 603.

[0046] like Figure 3 As shown, the reflux valve 603 includes a reflux pipe 6031, a one-way valve column 6032, a connecting spring 6033 and a blocking ring 6034;

[0047] The outer side of the bottom of the telescopic bellows 602 is fixedly connected to the outer side of the top of the hydraulic cylinder 501 through the return pipe 6031, the one-way valve column 6032 is movably installed at the bottom of the outer side of the return pipe 6031, the bottom of the one-way valve column 6032 is elastically connected to the inner cavity of the return pipe 6031 through the connecting spring 6033, and the blocking ring 6034 is fixedly installed inside the return pipe 6031 and is located above the return pipe 6031.

[0048] The above scheme is adopted: by providing a connecting spring 6033, when the telescopic bellows 602 is compressed, the hydraulic oil at the bottom can smoothly flow into the return pipe 6031, which can push the one-way valve column 6032 downward and squeeze the connecting spring 6033, and smoothly return to the inside of the hydraulic cylinder 501 through the return pipe 6031. When the elastic force of the connecting spring 6033 is released, the one-way valve column 6032 is pushed upward, preventing the hydraulic oil in the hydraulic cylinder 501 from entering the telescopic bellows 602 through the return pipe 6031.

[0049] like Figure 6 and Figure 8 As shown, a shielding assembly 7 is provided on the outer side of the bottom of the oil-passing cylindrical box 5041, and the shielding assembly 7 includes a pneumatic cylinder 701, a shielding frame 702 and a through hole 703;

[0050] The pneumatic cylinder 701 is arranged inside the central pillar 2 and is located below the oil-passing cylindrical box 5041. The shielding frame 702 is arranged on the top of the pneumatic cylinder 701 and extends on both sides to the inside of the outer side of the oil-passing cylindrical box 5041. The through hole 703 is opened at the top of the outer end of the shielding frame 702.

[0051] The above solution is adopted: by providing a pneumatic cylinder 701, when the pneumatic cylinder 701 is in operation, the shielding frame 702 can be driven to move up and down and back and forth as a whole.

[0052] like Figure 6 As shown, the diameter of the through hole 703 matches the diameter of the inner cavity of the oil through pipe 5042 .

[0053] The above scheme is adopted: by providing a through hole 703, when the pneumatic cylinder 701 drives the shielding frame 702 to move downward as a whole, the through hole 703 will be opposite to the inner cavity of the oil passing pipe 5042, so that the oil passing cylindrical box 5041 can be smoothly connected with the inner cavity of the hydraulic cylinder 501 through the oil passing pipe 5042.

[0054] like Figure 5 and Fig. 9 As shown, a protective shell 10 located outside the middle of the oil pipe 5042 is provided on the outside of the central pillar 2, and a determination mechanism 8 is provided in the middle of the inner cavity of the oil cylindrical box 5041, and the outer end of the determination mechanism 8 extends to the inside of the protective shell 10. The determination mechanism 8 includes a driven impeller rod 801, a baffle 802, a driving wheel 803, a pressing assembly 804 and a pressure sensor 805;

[0055] The driven impeller rod 801 is movably sleeved in the middle of the inner cavity of the oil-passing cylindrical box 5041, the baffle 802 is arranged inside the oil-passing cylindrical box 5041 and is located above and below the outer side of the driven impeller rod 801, the driving wheel 803 is fixedly sleeved on the outer end of the driven impeller rod 801 and is located inside the protective shell 10, the pressing component 804 is arranged inside the protective shell 10 and is located below the driving wheel 803, and a pressure sensor 805 is arranged inside the protective shell 10 and is located below the pressing component 804.

[0056] The above scheme is adopted: by providing a driven impeller rod 801, when the driving hydraulic cylinder 4 breaks and loses the support for the central pillar 2, the power spring 503 will drive the balance support piston rod 502 to quickly reset for support, and then the hydraulic oil inside the hydraulic cylinder 501 will quickly flow between the oil passing pipe 5042 and the oil passing cylindrical box 5041, thereby driving the driven impeller rod 801 and the driving wheel 803 to rotate rapidly, and finally quickly push the pressing assembly 804 as a whole downward to contact the top of the pressure sensor 805, so that the pressure sensor 805 quickly senses the pressure data and sends it to the control end to remind the operator, and then the pneumatic cylinder 701 can be smoothly started to drive the shielding frame 702 to seal upward between the oil passing cylindrical box 5041 and the oil passing pipe 5042, thereby improving the supporting effect of the balance support piston rod 502 on the support platform 3.

[0057] like Fig. 9 As shown, the pressing assembly 804 is fixedly installed on the pressing assembly 804 and includes a pressing member 8041, a limiting column 8042 and a buffer spring 8043;

[0058] The pressing member 8041 is movably installed inside the support ring 9 and is located below the driving wheel 803. The limiting column 8042 is arranged inside the support ring 9 and is located inside the two sides of the pressing member 8041. The pressing member 8041 is elastically connected to the inside of the support ring 9 through the buffer spring 8043.

[0059] The above solution is adopted: by providing a buffer spring 8043, when the pushing wheel 803 rotates, the raised part on the surface will push the raised part on the top of the pressing piece 8041, pushing the pressing piece 8041 as a whole to move downward, and compressing the buffer spring 8043. Then, when the elastic force of the buffer spring 8043 is released, it will push the pressing piece 8041 as a whole to reset upward.

[0060] like Fig. 9 As shown, the surface of the limiting column 8042 is movably connected to the inner wall of the buffer spring 8043.

[0061] By adopting the above solution, the overall movement of the pressing member 8041 and the buffer spring 8043 can be limited by the design of the limiting column 8042.

[0062] The working principle and use process of the present invention:

[0063] Firstly, when it is necessary to drive the hydraulic cylinder 4 to simulate the product on the top of the support platform 3, the pneumatic cylinder 701 can be started first to drive the shielding frame 702 to move downward as a whole, so that the through hole 703 is opposite to the oil passing pipe 5042, and then when the hydraulic cylinder 4 is started to simulate the support platform 3, the balance support piston rod 502 will be pressed or pulled out. At this time, the hydraulic oil in the inner cavity at the top of the hydraulic cylinder 501 will flow back and forth inside the hydraulic cylinder 501 through the oil passing pipe 5042 and the oil passing cylindrical box 5041, so as to keep the balance support piston rod 502 moving smoothly as a whole.

[0064] During the up and down movement of the balancing support piston rod 502, when the surface of the balancing support piston rod 502 contacts the ball 601, the sliding friction between the balancing support piston rod 502 and the top inner wall of the hydraulic cylinder 501 will be converted into rolling friction. At this time, the wear on the surface of the balancing support piston rod 502 is reduced, and the service life of the balancing support piston rod 502 is increased. The hydraulic oil leaked from the inside of the hydraulic cylinder 501 will enter the telescopic bellows 602 for storage.

[0065] Afterwards, when a single driving hydraulic cylinder 4 or two driving hydraulic cylinders 4 are damaged and the support to the bottom of the supporting platform 3 is released, the elastic force of the power spring 503 will be released instantly, thereby pushing or pulling the balance support piston rod 502 to reset upward as a whole, and the hydraulic oil at the top of the inner cavity of the hydraulic cylinder 501 will quickly flow between the oil pipe 5042 and the oil cylindrical box 5041, thereby driving the driven impeller rod 801 and the driving wheel 803 to rotate rapidly as a whole. At this time, the raised part on the surface of the driving wheel 803 will quickly press against the pressing piece 8 The raised part on the top of 041 drives the pressing piece 8041 as a whole downward and contacts the top of the pressure sensor 805, so that the pressure sensor 805 quickly receives the pressure data and transmits it to the control end to control the operator in time, and finally the pneumatic cylinder 701 can be controlled to push the shielding frame 702 as a whole upward, so that the through hole 703 and the oil through pipe 5042 are misaligned, thereby blocking the connecting end of the oil cylindrical box 5041 and the oil through pipe 5042, thereby improving the stability of the overall support of the support platform 3 by the balance support piston rod 502.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-degree-of-freedom simulation test platform, characterized in that: comprising a base (1); A central pillar (2) is fixedly mounted at the middle of the top of the base (1), and a support ring (9) is provided at the middle; The supporting platform (3) is spherically sleeved on the top of the central pillar (2); A driving hydraulic cylinder (4) is universally hinged to one side between the supporting platform (3) and the base (1); The balancing support mechanism (5) comprises a hydraulic cylinder (501), the hydraulic cylinder (501) is spherically sleeved on the top of the support ring (9), the balancing support piston rod (502) is movably installed in the inner cavity of the hydraulic cylinder (501), and the top is spherically sleeved with the bottom of the support platform (3), the bottom of the balancing support piston rod (502) is elastically connected to the inner cavity of the hydraulic cylinder (501) through a power spring (503), and a circulation component (504) is arranged inside the central pillar (2), and the two sides are fixedly connected with the top of the hydraulic cylinder (501).

2. The two-degree-of-freedom simulation test platform according to claim 1, characterized in that: The circulation component (504) includes an oil-passing cylindrical box (5041) and an oil-passing pipe (5042); The oil cylindrical box (5041) is arranged above and below the middle of the central pillar (2). The outer side of the oil cylindrical box (5041) is fixedly connected to the inner side of the top of the hydraulic cylinder (501) through an oil pipe (5042). The oil pipe (5042) is designed with rubber.

3. The two-degree-of-freedom simulation test platform according to claim 1, characterized in that: A wear reduction assembly (6) is provided on the top of the hydraulic cylinder (501), and the wear reduction assembly (6) comprises a ball (601), a telescopic bellows (602) and a return valve (603); The ball (601) is movably sleeved on the top of the inner cavity of the hydraulic cylinder (501), the telescopic bellows (602) is arranged between the top of the hydraulic cylinder (501) and the top surface of the balance support piston rod (502), and the bottom of the outer side of the telescopic bellows (602) is fixedly connected to the outer side of the top of the hydraulic cylinder (501) through a return valve (603).

4. The two-degree-of-freedom simulation test platform according to claim 3, characterized in that: The number of the telescopic bellows (602) is four, and the four telescopic bellows (602) are made of polyvinyl chloride.

5. The two-degree-of-freedom simulation test platform according to claim 3, characterized in that: The reflux valve (603) comprises a reflux pipe (6031), a one-way valve column (6032), a connecting spring (6033) and a blocking ring (6034); The outer side of the bottom of the telescopic bellows (602) is fixedly connected to the outer side of the top of the hydraulic cylinder (501) through the return pipe (6031), the one-way valve column (6032) is movably installed at the bottom of the outer side of the return pipe (6031), the bottom of the one-way valve column (6032) is elastically connected to the inner cavity of the return pipe (6031) through a connecting spring (6033), and the blocking ring (6034) is fixedly installed inside the return pipe (6031) and is located above the return pipe (6031).

6. The two-degree-of-freedom simulation test platform according to claim 2, characterized in that: A shielding assembly (7) is arranged on the outer side of the bottom of the oil-passing cylindrical box (5041), and the shielding assembly (7) comprises a pneumatic cylinder (701), a shielding frame (702) and a through hole (703); The pneumatic cylinder (701) is arranged inside the central pillar (2) and is located below the oil-passing cylindrical box (5041). The shielding frame (702) is arranged on the top of the pneumatic cylinder (701) and extends on both sides to the inside of the outer side of the oil-passing cylindrical box (5041). The through hole (703) is opened at the top of the outer end of the shielding frame (702).

7. The two-degree-of-freedom simulation test platform according to claim 6, characterized in that: The diameter of the through hole (703) matches the diameter of the inner cavity of the oil through pipe (5042).

8. The two-degree-of-freedom simulation test platform according to claim 6, characterized in that: The outer side of the central pillar (2) is provided with a protective shell (10) located outside the middle of the oil pipe (5042); the middle of the inner cavity of the oil cylindrical box (5041) is provided with a determination mechanism (8), and the outer end of the determination mechanism (8) extends into the protective shell (10); the determination mechanism (8) comprises a driven impeller rod (801), a baffle (802), a driving wheel (803), a pressing assembly (804) and a pressure sensor (805); The driven impeller rod (801) is movably sleeved in the middle of the inner cavity of the oil-passing cylindrical box (5041); the baffle (802) is arranged inside the oil-passing cylindrical box (5041) and is located above and below the outer side of the driven impeller rod (801); the driving wheel (803) is fixedly sleeved on the outer end of the driven impeller rod (801) and is located inside the protective shell (10); the pressing component (804) is arranged inside the protective shell (10) and is located below the driving wheel (803); and a pressure sensor (805) located below the pressing component (804) is arranged inside the protective shell (10).

9. The two-degree-of-freedom simulation test platform according to claim 8, characterized in that: The pressing assembly (804) is fixedly mounted on the pressing assembly (804) and comprises a pressing member (8041), a limiting column (8042) and a buffer spring (8043); The pressing member (8041) is movably installed inside the support ring (9) and is located below the driving wheel (803). The limiting columns (8042) are arranged inside the support ring (9) and are located inside the two sides of the pressing member (8041). The pressing member (8041) is elastically connected to the inside of the support ring (9) via a buffer spring (8043).

10. The two-degree-of-freedom simulation test platform according to claim 9, characterized in that: The surface of the limiting column (8042) is movably connected to the inner wall of the buffer spring (8043).

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