Hydraulic Lock Life Reliability Test Device

Abstract

The present invention relates to the technical field of hydraulic lock testing, and discloses a hydraulic lock life reliability testing device, which includes a test bench; two load cylinders are provided, both load cylinders are arranged at the top of the test bench, and one of the load cylinders can slide relative to the test bench; the two load cylinders are respectively communicated with two oil ports at the top of the hydraulic lock body, and the oil outlet of one of the load cylinders is communicated with the oil inlet of the other load cylinder through a connecting pipe; two hydraulic pumps are provided, the two hydraulic pumps are arranged at the bottom of the test bench, and the two hydraulic pumps are communicated with the hydraulic lock body through a reversing valve, and the other ends of the reversing valves are respectively provided with an external oil tank through an oil return pipe to realize the oil supply and oil return of the two oil circuits of the hydraulic lock body. This hydraulic lock life reliability testing device can effectively solve the problems in the prior art that the oil pipes of the load cylinders are difficult to adapt to hydraulic locks with different hole distances during the testing process and the testing work is not safe and reliable enough.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic lock testing, and specifically to a hydraulic lock life reliability testing device. Background Art

[0002] A hydraulic lock is a hydraulic component that locks the flow of oil in a circuit to ensure that the oil cylinder remains stationary under the action of an external force; it consists of two pilot-operated check valves to achieve the interlocking of oil and prevent the hydraulic cylinder from moving by itself due to the action of the load; it is mainly used for statically locking the load and is applicable to equipment such as the outriggers of truck cranes and airport elevating work platforms.

[0003] When testing a traditional hydraulic lock, it is necessary to install and connect the inlet and outlet fluid interfaces of the hydraulic lock to the inlet and outlet fluid ports of the load cylinder, and the reliability of the hydraulic lock is reflected through the load cylinder; since it is often difficult to align the inlet and outlet fluid ports of the hydraulic lock with those of the load cylinder, the inlet and outlet fluid ports of the load cylinder are usually connected to the hydraulic lock using oil pipes. If the oil pipe is a metal pipe, the interface of the load cylinder will be fixed, making it difficult to adapt to hydraulic locks with different hole pitches; if the oil pipe is a flexible pipe, although it can adapt to the installation and connection of hydraulic locks with different hole pitches, it is prone to damage due to external factors (such as wear, aging, high pressure inside the pipe, etc.) during repeated testing, resulting in the testing work of the hydraulic lock being not safe and reliable enough. Summary of the Invention

[0004] In view of the above-mentioned drawbacks of the prior art, the present invention provides a hydraulic lock life reliability testing device, which can effectively solve the problems in the prior art that the oil pipes of the load cylinder are difficult to adapt to hydraulic locks with different hole pitches and the testing work is not safe and reliable enough during the testing process.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] A hydraulic lock life reliability testing device includes a test bench for carrying the hydraulic lock body to be tested, and further includes:

[0007] Two load cylinders are provided, both of the load cylinders are arranged at the top of the test bench, and one of the load cylinders can slide relative to the test bench; the two load cylinders are respectively communicated with the two oil ports at the top of the hydraulic lock body, and the oil outlet of one of the load cylinders is communicated with the oil inlet of the other load cylinder through a connecting pipe;

[0008] Two hydraulic pumps are provided, both of the hydraulic pumps are arranged at the bottom of the test bench, and the two hydraulic pumps are communicated with the hydraulic lock body through a reversing valve. The other ends of the reversing valves are each provided with an external oil tank through an oil return pipe to achieve the oil supply and oil return of the two oil circuits of the hydraulic lock body.

[0009] Furthermore, it further includes;

[0010] A load component, configured at the top end of the load cylinder, for providing a test load to the two load cylinders;

[0011] Wherein, the load component includes:

[0012] A column, configured at the top end of the test bench;

[0013] A top plate, connected to the top end of the column, and load cylinders are provided at both ends of the top plate, and counterweights serving as the loads of the load cylinders are placed in the load cylinders.

[0014] Further, the load component further includes:

[0015] A balance bar, configured at the output ends of the two load cylinders, and the balance bar is rotatably arranged on one side of the column;

[0016] A rotating arm, rotatably arranged at the end of the balance bar, the other end of the rotating arm faces the load cylinder, and in the working state, the other end of the rotating arm abuts / connects with the counterweight in the load cylinder.

[0017] Further, the column is slidably configured transversely at the top end of the test bench;

[0018] A sliding sleeve is slidably configured on one side of the load cylinder, a connecting rod is rotatably connected to the outside of the sliding sleeve, and the other end of the connecting rod is rotatably arranged on the outside of the other load cylinder;

[0019] A first slider is rotatably arranged at the intersection of the two connecting rods, and the first slider is slidably arranged vertically on one side of the column.

[0020] Further, a through hole is provided at the top end of the test bench, a first sealing sleeve is fixed on one side of the through hole, and the first sealing sleeve is used to connect an oil port at the bottom of the hydraulic lock body;

[0021] A sealing component is further included, arranged at the bottom ends of the two load cylinders and on one side of the through hole, and the three sealing components can all slide relative to the test bench to align with the other three oil ports of the hydraulic lock body respectively.

[0022] Further, a moving component is further included, the moving component is slidably arranged transversely at the top end of the test bench, and is used to drive the sealing component to move so that the sealing component aligns with the oil port of the hydraulic lock body.

[0023] Further, the moving component includes:

[0024] A sliding seat, slidably configured transversely at the top end of the test bench;

[0025] A first support plate, connected to the top end of the sliding seat, for supporting one of the sealing components;

[0026] A second support plate is arranged on one side of the first support plate, and a sliding hole is formed in the inner side of the second support plate;

[0027] A second slider is slidably arranged at the sliding hole and is used to support another sealing assembly;

[0028] A sliding frame is slidably arranged along the transverse direction at the top of the test bench; a third sealing assembly is connected to the sliding frame.

[0029] Further, the moving assembly further includes:

[0030] A first linear member is arranged between the sliding seat and the first support plate and is used to drive the first support plate to move vertically;

[0031] A second linear member is arranged between the sliding seat and the second support plate and is used to drive the second support plate to move vertically;

[0032] A third linear member is arranged at the sliding frame and is used to drive the third sealing assembly to move vertically.

[0033] Further, a first bearing plate is connected to the bottom end of the sliding frame, and several sliding pins are arranged at the top end of the sliding frame;

[0034] A corresponding sealing assembly is installed on the first mounting block, the first mounting block is installed at the top end of the first bearing plate, several sliding pins pass through the first mounting block, and the output end of the third linear member is connected to the first mounting block.

[0035] Further, two bearing plates are rotatably arranged on the outer side of the test bench, and the two bearing plates are connected to the same bottom plate;

[0036] Push members are arranged on both sides at the top end of the bottom plate and are used to drive the test bench to rotate reciprocally to both sides so as to drive the moving assembly to move.

[0037] Further, the load oil cylinder is connected to the sealing assembly through a solenoid valve;

[0038] Wherein, the sealing assembly includes:

[0039] A second sealing sleeve, one end of which is provided with an external thread and is used to be connected to a corresponding component;

[0040] An inner tube is slidably arranged inside the second sealing sleeve, and a part of the inner tube extends out of the second sealing sleeve;

[0041] A limiting ring is connected to one side of the inner tube;

[0042] An elastic member is sleeved outside the inner tube, and the elastic member is restricted by the limiting ring.

[0043] Furthermore, two support plates are provided at the top of the test bench for temporarily supporting the hydraulic lock body;

[0044] One side of the support plate is connected with a push rod for driving the support plate to move longitudinally.

[0045] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0046] 1. The present invention is provided with two load cylinders instead of a traditional single cylinder. The two cylinders are connected through a connecting pipe so as to adjust the positions of the load cylinders according to the two oil ports at the top of the hydraulic lock body, enabling the test equipment to adapt to hydraulic lock bodies of different specifications. Moreover, the connecting pipe for connecting the load cylinders is in the low-pressure flow area of the hydraulic oil and will not be affected by the high pressure of the hydraulic oil, ensuring the stability of the test equipment;

[0047] 2. The present invention is provided with two load cylinders instead of a traditional single cylinder. The two load cylinders are respectively installed corresponding to the two oil circuits inside the hydraulic lock body, enabling the two oil circuits inside the hydraulic lock body to always be under load during the oil supply and oil return processes, so as to facilitate simulating the life reliability test of the hydraulic lock body under load conditions;

[0048] 3. The load cylinders are connected to the hydraulic lock body by setting a sealing assembly, and the two right-angle pipes are connected by the first sealing sleeve and the sealing assembly at the top of the test bench. The other end of the right-angle pipe is connected with a hydraulic pump for inputting hydraulic oil into the interior of the right-angle pipe and then into the interior of the hydraulic lock body for testing work. This enables the test equipment to use a metal connection structure with the hydraulic lock body under adjustable conditions, preventing damage to the connection structure between the test equipment and the hydraulic lock body during the test process and affecting the stability of the test work. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0050] Figure 1 It is a schematic diagram of the internal structure of the hydraulic lock body involved in the embodiment of the present invention;

[0051] Figure 2 It is a schematic three-dimensional structure diagram of the embodiment of the present invention;

[0052] Figure 3 It is a schematic front view structure diagram of the embodiment of the present invention;

[0053] Figure 4 Structural schematic diagram of the support plate in the embodiment of the present invention;

[0054] Figure 5 Structural schematic diagram of the moving component in the embodiment of the present invention;

[0055] Figure 6 Structural schematic diagram of the adapter in the embodiment of the present invention;

[0056] Figure 7 Structural schematic diagram of the load component in the embodiment of the present invention;

[0057] Figure 8 Structural schematic diagram of the moving component and the load oil cylinder in the embodiment of the present invention;

[0058] Figure 9 Structural schematic diagram of the load oil cylinder and the hydraulic lock body in the embodiment of the present invention;

[0059] Figure 10 Structural schematic diagram of the mating structure of the first sealing sleeve and the adapter in the embodiment of the present invention;

[0060] Figure 11 Structural schematic diagram of the assembly structure of the first sealing sleeve and the second sealing sleeve in the embodiment of the present invention;

[0061] Figure 12 Structural schematic diagram of the sealing component and the first mounting block in the embodiment of the present invention;

[0062] Figure 13 Structural schematic diagram of the explosion of the sealing component in the embodiment of the present invention;

[0063] Figure 14 Structural schematic diagram of the assembly structure of two load oil cylinders in the embodiment of the present invention.

[0064] The reference numerals in the figure respectively represent: 100, hydraulic lock body; 101, end cover; 102, sliding column; 103, plugging member; 104, spring; 200, adapter;

[0065] 1, test bench; 11, through hole; 12, first sealing sleeve; 13, chute; 14, first slide rail; 15, right-angle plate; 16, bearing plate; 17, bottom plate; 18, pushing member; 19, back plate;

[0066] 2, support plate; 21, support table; 22, push rod;

[0067] 3, moving component; 31, sliding seat; 32, first linear member; 33, first support plate; 34, second linear member; 35, second support plate; 351, sliding hole; 36, first mounting block; 37, second slider; 38, second slide rail; 39, sliding frame; 391, first bearing plate; 392, sliding pin;

[0068] 4. Load cylinder; 41. Connecting pipe; 42. Solenoid valve; 43. Roller; 44. Limit block; 45. Sliding sleeve; 46. Connecting rod; 47. First slider;

[0069] 5. Load assembly; 51. Column; 52. Top plate; 53. Load cylinder; 54. Balance rod; 55. Rotating arm;

[0070] 6. Sealing assembly; 61. Second sealing sleeve; 62. Inner pipe; 63. Conical surface; 64. Limit ring; 65. Elastic member;

[0071] 7. Second mounting block; 71. Right-angle pipe; 72. Directional control valve; 73. Hydraulic pump; 74. Return pipe; 75. Third linear member; 76. Second bearing plate. Detailed implementation manners

[0072] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0073] In the specific explanation of the embodiments, the horizontal, vertical and longitudinal directions are described with reference to the Figure 2 directions shown therein. The indication of the directions herein is only for facilitating the explanation of the specific solutions and does not make any substantial limitation.

[0074] The structural schematic diagram of the hydraulic lock body 100 involved in the embodiments of the present application is as shown in Figure 1 The hydraulic lock body 100 is a prior art. The description of the structural principle of the hydraulic lock body 100 herein is for facilitating the understanding of the specific technical solutions of the present application.

[0075] For the convenience of showing the internal mechanism, Figure 1 some cross-hatching lines are not added to the cross-sectional structure diagram of Figure 1 As shown in, the hydraulic lock body 100 includes two oil ports (P oil port and Q oil port) at the bottom and two oil ports (M oil port and N oil port) at the top; end covers 101 are provided at both ends of the hydraulic lock body 100, and a sliding column 102 is slidably arranged in the hydraulic lock body 100; plugging members 103 are connected to the end covers 101 at both sides through springs 104.

[0076] During the conventional test process, the test cylinder is connected to the two oil ports at the top. At this time, if the hydraulic oil enters the hydraulic lock body 100 from the P oil port, the hydraulic oil enters into theFigure 1 At the sliding column 102 and the plugging member 103 on the left side shown, at this time, under the action of the hydraulic oil, both the sliding column 102 and the plugging member 103 move, and the two move away from each other. Then the hydraulic oil passes through the oil circuit and enters the test oil cylinder from the M oil port, and then enters the N oil port from the test oil cylinder;

[0077] Since the hydraulic oil pushes the sliding column 102 to move to the right when entering the left oil circuit, at this time the sliding column 102 pushes the plugging member 103 on the right to move to the right, so that the plugging member 103 on the right no longer plugs the right oil circuit, enabling the hydraulic oil entering the hydraulic lock body 100 from the N oil port to pass through the right oil circuit and finally return oil from the Q oil port.

[0078] The principle of the hydraulic oil entering the hydraulic lock body 100 from the Q oil port for testing is the same as the foregoing principle.

[0079] When directly injecting hydraulic oil from the M oil port or the N oil port, since the plugging member 103 plugs the corresponding oil circuit, the locking of the oil circuit is realized, and there is no oil body flow in the circuit.

[0080] The present invention will be further described below in conjunction with embodiments.

[0081] Please refer to Figures 2 - 14 , the present invention provides a technical solution: a hydraulic lock life reliability test device, including a test bench 1, a support plate 2, a moving assembly 3, a load oil cylinder 4, a load assembly 5 and a sealing assembly 6. A through hole 11 is opened at the top of the test bench 1, and a first sealing sleeve 12 is fixedly arranged inside the through hole 11 at the top of the test bench 1 for connecting an oil port at the bottom of the hydraulic lock body 100; the support plate 2 is arranged on the top of the test bench 1 and is located on both sides of the through hole 11 for temporarily supporting the hydraulic lock body 100; the moving assembly 3 is slidably arranged on the top of the test bench 1 through a first slide rail 14, and the first slide rail 14 is fixedly arranged horizontally on the top of the test bench 1; the load oil cylinder 4 is located on the top of the moving assembly 3, and there are two load oil cylinders. The two load oil cylinders are respectively driven by the moving assembly 3 to be aligned and matched with the two oil ports at the top of the hydraulic lock body 100. The oil outlet of one of the load oil cylinders 4 is communicated with the oil inlet of the other load oil cylinder 4 through a connecting pipe 41; the load assembly 5 is located on the top of the load oil cylinder 4 for providing a test load to the two load oil cylinders 4; the three sealing assemblies 6 involved in the embodiments of the present application are respectively arranged at the bottom of the two load oil cylinders 4 and on one side of the through hole 11, and the sealing assemblies 6 are slidably aligned and matched with the remaining three oil ports on the upper and lower sides of the hydraulic lock body 100 respectively.

[0082] In the embodiments of the present application, the hydraulic lock body is provided with a total of four oil ports. One of the oil ports at the bottom is connected through a first sealing sleeve 12, and the remaining three oil ports are all connected through a sealing assembly 6. The two oil ports at the bottom end are communicated with a hydraulic pump 73 or an external oil tank through the corresponding first sealing sleeve 12 or sealing assembly 6, and the two oil ports at the top end are communicated with the corresponding load cylinders 4 through the sealing assembly 6.

[0083] A right-angle plate 15 is fixedly arranged at the bottom of the test bench 1. A bearing plate 16 is rotatably arranged on the outer side of the right-angle plate 15. A bottom plate 17 is fixedly arranged at the bottom of the bearing plate 16. Pushing members 18 are symmetrically and fixedly arranged at the top of the bottom plate 17. The pushing members 18 are used to drive the test bench 1 to rotate reciprocally to both sides. The bearing plate 16 is located at the middle position on the outer side of the test bench 1. A back plate 19 is fixedly arranged on the outer side of the bottom plate 17 for protecting the load assembly 5 to ensure safety.

[0084] Among them, during the rotation of the test bench 1, the moving assembly 3 drives the two load cylinders 4 to slide on the top of the hydraulic lock body 100 by its own gravity, so that the two sealing assemblies 6 connected to the load cylinders 4 can move accordingly to align with the two oil ports on the top of the hydraulic lock body 100 respectively. And the third sealing assembly 6 slides inside the through hole 11 by its own gravity for automatically aligning and matching with the oil port at the bottom end outside the hydraulic lock body 100.

[0085] The pushing member is a power member with a linear stroke, and can be selected from a linear slide rail, a pneumatic drag bar, an electric push rod, etc. In the embodiments of the present application, a hydraulic push rod with a relatively large driving force is selected.

[0086] The moving assembly 3 includes a sliding seat 31, a first linear member 32, a second linear member 34 and a second slider 37. The sliding seat 31 is slidably arranged on the top of the test bench 1 along a first slide rail 14. The first linear member 32 is fixedly arranged on the top of the sliding seat 31. The top of the telescopic end of the first linear member 32 is fixedly provided with a first support plate 33 for supporting one of the load cylinders 4. The second linear member 34 is fixedly arranged on the top of the sliding seat 31. The top of the telescopic end of the second linear member 34 is fixedly provided with a second support plate 35. A sliding hole 351 is opened inside the second support plate 35. The second slider 37 is slidably arranged inside the sliding hole 351 for supporting the other load cylinder 4.

[0087] The load assembly 5 includes a column 51 and a top plate 52. The column 51 is slidably arranged on the top of the second support plate 35 through a second slide rail 38. The second slide rail 38 is fixedly arranged on one side of the top of the second support plate 35. The column 51 slides along with the two load cylinders 4 and is always located on the symmetry axis of the two load cylinders 4. The top plate 52 is fixedly arranged on the top of the column 51. Load cylinders 53 are fixedly arranged at both ends of the column 51 for placing counterweights as the load of the load cylinder 4.

[0088] A sliding sleeve 45 is slidably arranged along the axial direction on the outside of each load cylinder 4. The sliding sleeve 45 is slidably arranged on the outside of a limiting block 44, and the limiting block 44 is fixedly arranged on the outside of the corresponding load cylinder 4. A connecting rod 46 is rotatably arranged on the outside of each sliding sleeve 45, and the other ends of the connecting rods 46 are rotatably arranged on one side of another load cylinder 4 / solenoid valve 42 correspondingly; the two connecting rods 46 are arranged in a cross shape, and a first slider 47 is rotatably arranged at the intersection of the two connecting rods 46. The first slider 47 is slidably arranged on the outside of the column 51.

[0089] A balance rod 54 is rotatably arranged on the outside of the column 51. Rotating arms 55 are rotatably arranged at both ends of the balance rod 54. The other ends of the rotating arms 55 are obliquely arranged above the balance rod 54 and are located at the bottom of the load cylinder 53 for pushing the load inside the load cylinder 53; among them, the balance rod 54 is in a balanced state under the initial state, and the bottom of the balance rod 54 is tilted by the pushing of the two load cylinders 4. A roller 43 is rotatably arranged at the top of the telescopic end of the load cylinder 4.

[0090] Two sealing assemblies 6 connected to the load cylinder 4 are installed at the bottom of the load cylinder 4 through the solenoid valve 42, and the other sealing assembly 6 is arranged at a sliding frame 39 through a first mounting block 36. One of the hydraulic pumps 73 is connected to one side of the sliding frame 39.

[0091] The sealing assembly 6 includes a second sealing sleeve 61, an inner pipe 62 and an elastic member 65. The second sealing sleeve 61 is threadedly installed at the corresponding component, that is, the second sealing sleeves 61 of the two sealing assemblies 6 connected to the solenoid valve 42 are threadedly connected to the bottom of the solenoid valve 42, and the second sealing sleeve 61 connected to the first mounting block 36 is threadedly installed at the top of the first mounting block 36; a conical surface 63 is arranged on the inner side of the second sealing sleeve 61, and a union joint 200 is arranged in cooperation with the inner side of the conical surface 63. The union joint 200 is detachably installed on four oil ports on the outside of the hydraulic lock body 100; the inner pipe 62 is slidably arranged inside the second sealing sleeve 61, and the top end extends out of the top of the second sealing sleeve 61. A chamfer structure is arranged at the top of the inner pipe 62, and a limiting ring 64 is fixedly arranged on the outside of the inner pipe 62; the elastic member 65 is sleeved on the outside of the inner pipe 62 and is limited by the corresponding limiting ring 64.

[0092] It can be understood that, in order to facilitate the cooperation between the first sealing sleeve 12 and the union joint 200, a conical surface consistent with that inside the second sealing sleeve 61 is also arranged inside the first sealing sleeve 12.

[0093] In the above technical solution, the sliding frame 39 is slidably arranged on the top of the test bench 1 along the chute 13. A first bearing plate 391 is fixedly arranged at the bottom of the sliding frame 39, and the first bearing plate 391 is located below the through hole 11. Slide pins 392 are fixedly arranged on both sides of the sliding frame 39. A first mounting block 36 is slidably arranged on the outer side of the slide pins 392. A third linear member 75 for driving the first mounting block 36 to slide is fixedly arranged at the bottom of the first bearing plate 391. A second bearing plate 76 for mounting the hydraulic pump 73 is fixedly arranged on the outer side of the first mounting block 36. The second bearing plate 76 is vertically slidably arranged on the outer side of the first bearing plate 391.

[0094] In the above technical solution, the first linear member 32, the second linear member 34, and the third linear member 75 are all power members with a linear stroke structure. The above linear members can be selected from linear guides, hydraulic push rods, pneumatic push rods, or electric push rods, etc. The staff can make an adaptive selection according to the actual requirements and installation environment.

[0095] It further includes a second mounting block 7, and the second mounting block 7 is fixedly arranged at the bottom of the first sealing sleeve 12. Right-angle pipes 71 are fixedly arranged at the bottoms of the first mounting block 36 and the second mounting block 7. A reversing valve 72 is fixedly arranged at the other end of each right-angle pipe 71. A hydraulic pump 73 is fixedly arranged at the oil inlet end of each reversing valve 72. A return oil pipe 74 is fixedly arranged at the oil outlet end of each reversing valve 72. The other ends of the hydraulic pump 73 and the return oil pipe 74 are both communicated with the fuel tank.

[0096] A support platform 21 is fixedly arranged on one side of the support plate 2 close to the hydraulic lock body 100. Push rods 22 are arranged on the other side of the support plate 2 away from the hydraulic lock body 100. The push rods 22 are fixedly arranged on the top of the test bench 1 and are used to drive the support plate 2 to move longitudinally.

[0097] Principle and advantages of the hydraulic lock life reliability test device:

[0098] First, according to the load-bearing capacity of the hydraulic lock body 100 to be tested, a certain mass of counterweights is placed inside the load cylinder 53. Then, the hydraulic lock body 100 is installed on the top of the test bench 1, such that the four oil ports of the hydraulic lock body 100 are respectively mated with the first sealing sleeve 12 and three sealing components, so that the hydraulic lock body 100 is connected to the test equipment. During the installation of the hydraulic lock body 100, the second slider 37 inside the sliding hole 351 drives the load cylinder 4 to slide, so as to adjust the distance between the two load cylinders 4. At the same time, the two load cylinders 4 push and pull the two cross-set connecting rods 46 to rotate around the connecting shaft, so that the upper connecting end of the connecting rod 46 drives the sliding sleeve 45 to slide vertically along the limiting block 44. At the same time, the connecting shaft of the first slider 47 drives the first slider 47 to slide horizontally and vertically, so that the first slider 47 drives the column 51 to slide along the second slide rail 38 on the top of the second support plate 35, ensuring that the column 51 is always located on the axis of symmetry of the two load cylinders 4, so that the load cylinder 53 supported by the column 51 is always symmetrically arranged above the load cylinders 4.

[0099] Then start one of the hydraulic pumps 73 to run. (For the convenience of description, it is defaulted that the hydraulic pump 73 at the bottom of the first sealing sleeve 12 is started first) so that the hydraulic pump 73 inputs the hydraulic oil inside the fuel tank into the hydraulic lock body 100 through the first sealing sleeve 12. At this time, the solenoid valve 42 at the bottom of the load cylinder 4 is in an open state, so that the hydraulic oil inside the hydraulic lock body 100 enters the load cylinder 4 through the solenoid valve 42, and the hydraulic oil inside the load cylinder 4 pushes the telescopic end to move upward. Furthermore, the roller 43 at the telescopic end of the load cylinder 4 pushes the bottom of the balance rod 54 to tilt, so that the rotating arm 55 at one end of the balance rod 54 pushes the counterweight inside the load cylinder 53 to move upward. At this time, the piston inside the load cylinder 4 pushes the hydraulic oil at the top through the connecting pipe 41 into the other load cylinder 4. (The installation and principle of the piston inside the load cylinder 4 are both prior arts and will not be elaborated here), so that the hydraulic oil inside the other load cylinder 4 is pushed into the hydraulic lock body 100. The hydraulic oil passing through the hydraulic lock body 100 finally enters the corresponding right-angle pipe 71 through the bottom sealing component 6. At this time, the corresponding reversing valve 72 of the right-angle pipe 71 connects the right-angle pipe 71 with the oil return pipe 74, so that the hydraulic oil realizes oil return.

[0100] By the same principle, when the hydraulic pump 73 outside the second bearing plate 76 is started, the other load cylinder 4 can be coordinated with the load component 5 to conduct the test. Furthermore, by alternately controlling the two reversing valves 72 and the hydraulic pump 73, the life reliability test of the hydraulic lock body 100 under load can be realized.

[0101] It should be noted that the above installation method has the following advantages:

[0102] Advantage 1: By setting two load cylinders 4 instead of a traditional single cylinder, the two cylinders are connected through a connecting pipe 41, so as to adjust the position of the load cylinder 4 according to the two oil ports at the top of the hydraulic lock body 100, enabling the test equipment to adapt to hydraulic lock bodies 100 of different specifications. Moreover, the connecting pipe 41 used to connect the load cylinder 4 is in the low-pressure flow area of the hydraulic oil and will not be affected by the high pressure of the hydraulic oil, ensuring the stability of the test equipment.

[0103] Advantage 2: By setting two load cylinders 4 instead of a traditional single cylinder, the two load cylinders 4 are respectively installed corresponding to the two oil circuits inside the hydraulic lock body 100, enabling the two oil circuits inside the hydraulic lock body 100 to always supply oil and return oil under load, so as to facilitate the life reliability test of the hydraulic lock body 100 under load conditions.

[0104] Advantage 3: By setting the load assembly 5 to provide load for the load cylinder 4, the weight inside the load cylinder 53 in the load assembly 5 can be adjusted according to different specifications of the hydraulic lock body 100. And the balance bar 54 below the load cylinder 53 pushes the counterweight under the jacking action of the load cylinder 4, transferring the load to the telescopic end of the load cylinder 4. At the same time, the center of the balance bar 54 can move together with the load cylinder 4, enabling the load assembly 5 to adapt to the test work of hydraulic lock bodies 100 of different specifications.

[0105] Advantage 4: By setting the sealing assembly 6 to connect the load cylinder 4 with the hydraulic lock body 100, and connecting the two right-angle pipes 71 through the first sealing sleeve 12 at the top of the test bench 1 and the sealing assembly 6. The other end of the right-angle pipe 71 is connected with a hydraulic pump 73, which is used to input hydraulic oil into the inside of the right-angle pipe 71 and then into the inside of the hydraulic lock body 100 for testing work. When the test equipment is adjustable, a metal connection structure is used between the test equipment and the hydraulic lock body 100 to prevent the connection structure between the test equipment and the hydraulic lock body 100 from being damaged during the test and affecting the stability of the test work.

[0106] When the sealing assembly 6 in the hydraulic lock life reliability test device of the present application is installed with the hydraulic lock body 100, first, the adapter 200 is correspondingly installed on the oil port of the hydraulic lock body 100. The shape of the outer side of the end of the adapter 200 matches the tapered surface 63, which belongs to a fixed specification size, and the other end matches the oil ports of different models of the hydraulic lock body 100. The adapter 200 of the corresponding specification can be selected according to the model of the hydraulic lock body 100 for installation. After the adapter 200 is installed, the hydraulic lock body 100 is manually placed between the two support plates 2 and supported by the support platform 21, and one of the adapters 200 at the bottom of the hydraulic lock body 100 is aligned and matched with the first sealing sleeve 12 first. Then, by controlling the lifting and lowering of the two push members 18 on the top of the control base plate 17, the test bench 1 rotates reciprocally around the outer connecting shaft.

[0107] Specifically, the sliding seat 31 is located at the A end of the first slide rail 14 in the initial state (refer to Figure 3 ), and the two load cylinders 4 are respectively located on both sides of the hydraulic lock body 100. Then, the test bench 1 is first rotated to the side away from the A end. At this time, the sliding seat 31 slides along the first slide rail 14 in the direction away from the A end, so that the sliding seat 31 drives the load cylinder 4 on the top of the first support plate 33 to move towards the adapter 200 of the hydraulic lock body 100 close to the A end until the sealing assembly 6 at the bottom of the load cylinder 4 is aligned with the adapter 200. At this time, the sliding seat 31 is unable to slide due to the resistance of the sealing assembly 6 and the adapter 200. Then, the test bench 1 is rotated to the side close to the A end, so that the test bench 1 drives the sealing assembly 6 inside the through hole 11 to approach the other adapter 200 at the bottom of the hydraulic lock body 100 until they are aligned and matched. At this time, since the sliding seat 31 cannot slide, the second slider 37 drives the load cylinder 4 to approach the other load cylinder 4, and at the same time, the load cylinder 4 drives the corresponding sealing assembly 6 to approach and align with the other adapter 200 at the top of the hydraulic lock body 100. Thus, by reciprocally rotating the test bench 1, the sealing assembly 6 is automatically assembled outside the top oil port of the hydraulic lock body 100.

[0108] Among them, during the process of the sealing assembly 6 being aligned and matched with the adapter 200, the inner tube 62 inside the second sealing sleeve 61 contacts the tapered surface outside the adapter 200, and under the extrusion effect, the limiting ring 64 outside the inner tube 62 compresses the elastic member 65. When the inner tube 62 moves to the hole position of the adapter 200, it is automatically inserted into the inside of the adapter 200 under the elastic force of the elastic member 65. At this time, the top of the second sealing sleeve 61 does not contact the adapter 200, preventing interference with the movement and alignment action. After the two sealing assemblies 6 at the top are both aligned with the corresponding adapters 200, the first linear member 32 and the second linear member 34 drive the corresponding sealing assemblies 6 to move towards the adapter 200 again, realizing the sealed connection between the adapter 200 and the sealing assembly 6.

[0109] It should be noted that the above installation method has the following advantages:

[0110] Advantage 1: By detachably arranging the adapter 200 and the hydraulic lock body 100, and making the shape of the adapter 200 match the tapered surface 63, so that after the adapter 200 is installed on the outside of hydraulic lock bodies 100 with different specifications, it has the same specification tapered surface, facilitating the sealing component 6 on the testing device to adapt to the testing work of hydraulic lock bodies 100 with different specifications;

[0111] Advantage 2: By driving the test bench 1 to reciprocally rotate on the top of the base plate 17 through the pusher 18, the test bench 1 first drives one of the load cylinders 4 to automatically align with an oil port at the top of the hydraulic lock body 100, and then drives the other load cylinder 4 and the sealing component 6 inside the through hole 11 to automatically align with the remaining oil ports of the hydraulic lock body 100, so as to correspondingly assemble the oil ports on the outside of the hydraulic lock body 100 on the testing device, preventing the hydraulic lock body 100 from being inconvenient to install due to its large mass and volume, and improving the convenience of use;

[0112] Advantage 3: By arranging the sliding seat 31 to support the two load cylinders 4 and the load component 5, when the test bench 1 drives the first sliding rail 14 to tilt, the sliding seat 31 smoothly slides under the gravity of the load cylinder 4 and the load component 5, and the power generated by this sliding can be used to drive the sealing component 6 to automatically align and cooperate with the adapter 200, and after the inner tube 62 is inserted into the adapter 200, the sealing component 6 and the corresponding adapter 200 are locked through the first linear member 32, the second linear member 34 and the third linear member 75 to ensure the smooth progress of the docking operation;

[0113] Advantage 4: When the test bench 1 tilts for the first time, it can drive one of the load cylinders 4 to automatically align with the adapter 200. When tilting for the second time, the other load cylinder 4 slides along the sliding hole 351 driven by the load component 5. Specifically, the load component 5 slides along the second sliding rail 38 relying on its own gravity, thereby driving the cross - arranged connecting rod 46 to contract, and the connecting rod 46 drives the load cylinder 4 to move closer to the top of the hydraulic lock body 100 to ensure the stability when the two load cylinders 4 move and align on both sides;

[0114] Advantage 5: During the alignment process of the sealing component 6 and the adapter 200, the inner tube 62 located inside the second sealing sleeve 61 is squeezed and slides and contracts by the tapered surface of the adapter 200. After the inner tube 62 is inserted into the adapter 200, the outer tapered side surface of the adapter 200 and the inner tapered surface 63 of the second sealing sleeve 61 cooperate with each other to realize the sealed connection between the adapter 200 and the sealing component 6.

[0115] In practical applications, the sealing method between the sealing component 6 and the adapter 200:

[0116] On the basis of aligning the sealing component 6 with the adapter 200, first drive the support plate 2 away from the hydraulic lock body 100 through the push rod 22 to release the support of the support platform 21 on the hydraulic lock body 100. At this time, the hydraulic lock body 100 is kept stable by the first sealing sleeve 12 at the bottom and the sealing component 6. Then, drive the two load cylinders 4 to press against the top of the hydraulic lock body 100 respectively through the first linear member 32 and the second linear member 34 at the top of the sliding seat 31 to achieve the sealed connection between the top adapter 200 and the sealing component 6. Under the action of pressure, the adapter 200 at the bottom of the hydraulic lock body 100 is hermetically connected to the first sealing sleeve 12. Finally, drive the right-angle pipe 71 to move upward through the third linear member 75, so that the right-angle pipe 71 pushes the first mounting block 36 to slide along the sliding pin 392, and then drives the sealing component 6 at the top of the first mounting block 36 to be pressed against the bottom of the hydraulic lock body 100 for sealed docking with the adapter 200. It should be noted that during the sliding process of the sliding frame 39, it moves relying on the gravity of components such as the hydraulic pump 73 and the third linear member 75.

[0117] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic lock life reliability testing device, comprising a test bench for carrying a hydraulic lock body (100) to be tested, characterized in that: Also includes: Two load cylinders (4) are provided, and both load cylinders (4) are provided at the top of the test bench (1), and one of the load cylinders (4) is capable of sliding relative to the test bench (1); the two load cylinders (4) are respectively connected to two oil ports at the top of the hydraulic lock body (100), and the oil outlet of one load cylinder (4) is connected to the oil inlet of the other load cylinder (4) through a connecting pipe (41); Two hydraulic pumps (73) are provided, the two hydraulic pumps (73) are arranged at the bottom end of the test bench (1), and the two hydraulic pumps (73) are connected to the hydraulic lock body (100) through the reversing valve (72), and the other end of the reversing valve (72) is provided with an external oil tank through an oil return pipe (74) to realize oil supply and oil return of two oil circuits of the hydraulic lock body (100); A load assembly (5) is arranged at the top end of the load cylinder (4) and is used to provide a test load to the two load cylinders (4); Wherein, the load component (5) comprises: A column (51) is arranged on the top of the test bench (1); A top plate (52) is connected to the top of the column (51), and both ends of the top plate (52) are provided with load cylinders (53), and a counterweight serving as a load of the load cylinder (4) is placed in the load cylinder (53); The column (51) is slidably arranged at the top of the test bench (1) in a transverse direction; a sliding sleeve (45) is slidably arranged on one side of the load cylinder (4); a connecting rod (46) is rotatably connected to the outer side of the sliding sleeve (45), and the other end of the connecting rod (46) is rotatably arranged on the outer side of another load cylinder (4); a first sliding block (47) is rotatably arranged at the intersection of the two connecting rods (46), and the first sliding block (47) is slidably arranged on one side of the column (51) in a vertical direction.

2. The hydraulic lock life reliability testing device according to claim 1 is characterized in that: The load component (5) further comprises: A balance rod (54) is arranged at the output ends of the two load cylinders (4), and the balance rod (54) is rotatably arranged on one side of the column (51); The rotating arm (55) is rotatably arranged at the end of the balancing rod (54), and the other end of the rotating arm (55) is arranged toward the load cylinder (53). In the working state, the other end of the rotating arm (55) contacts / is connected with the counterweight in the load cylinder (53).

3. The hydraulic lock life reliability testing device according to claim 1 is characterized in that: A through hole (11) is provided at the top of the test bench (1), a first sealing sleeve (12) is fixed to one side of the through hole (11), and the first sealing sleeve (12) is used to connect to an oil port at the bottom of the hydraulic lock body (100); It also includes a sealing assembly (6) disposed at the bottom ends of the two load oil cylinders (4) and one side of the through hole (11), wherein the three sealing assemblies (6) are all capable of sliding relative to the test bench (1) to align with the remaining three oil ports of the hydraulic lock body (100), respectively.

4. The hydraulic lock life reliability testing device according to claim 3 is characterized in that: It also comprises a moving assembly (3), which is arranged on the top of the test bench (1) in a lateral sliding manner and is used to drive the sealing assembly (6) to move so that the sealing assembly (6) is aligned with the oil port of the hydraulic lock body (100).

5. The hydraulic lock life reliability testing device according to claim 4 is characterized in that: The mobile component (3) comprises: A slide seat (31) is arranged on the top of the test bench (1) in a lateral sliding manner; A first support plate (33) connected to a top end of the slide seat (31) and used to support one of the sealing assemblies (6); A second support plate (35) is arranged on one side of the first support plate (33), and a sliding hole (351) is provided on the inner side of the second support plate (35); A second sliding block (37) slidably disposed at the sliding hole (351) and used to support another sealing assembly (6); The sliding frame (39) is arranged on the top of the test bench (1) in a lateral sliding manner; and the third sealing component (6) is connected to the sliding frame (39).

6. The hydraulic lock life reliability testing device according to claim 5 is characterized in that: The mobile component (3) further comprises: A first straight member (32) is disposed between the slide seat (31) and the first support plate (33) and is used to drive the first support plate (33) to move vertically; A second straight member (34) is disposed between the slide seat (31) and the second support plate (35), and is used to drive the second support plate (35) to move vertically; The third linear member (75) is arranged on the sliding frame (39) and is used to drive the third sealing assembly (6) to move vertically.

7. The hydraulic lock life reliability testing device according to claim 6 is characterized in that: The bottom end of the sliding frame (39) is connected to a first bearing plate (391), and the top end of the sliding frame (39) is provided with a plurality of sliding pins (392); The corresponding sealing assembly (6) is mounted on a first mounting block (36), the first mounting block (36) is mounted on the top end of the first bearing plate (391), a plurality of sliding pins (392) are arranged through the first mounting block (36), and the output end of the third straight member (75) is connected to the first mounting block (36).

8. The hydraulic lock life reliability testing device according to claim 5, characterized in that: Two bearing plates (16) are rotatably arranged on the outer side of the test bench (1), and the two bearing plates (16) are connected to the same bottom plate (17); Pushing members (18) are arranged on both sides of the top end of the bottom plate (17) and are used to drive the test bench (1) to reciprocate to both sides, thereby driving the moving assembly (3) to move.

9. The hydraulic lock life reliability testing device according to claim 3 is characterized in that: The load oil cylinder (4) is connected to the sealing assembly (6) via a solenoid valve (42); Wherein, the sealing component (6) comprises: A second sealing sleeve (61), one end of which is provided with an external thread for connecting with a corresponding component; An inner tube (62) is slidably disposed on the inner side of the second sealing sleeve (61), and a portion of the inner tube (62) extends out of the second sealing sleeve (61); A limiting ring (64) connected to one side of the inner tube (62); The elastic member (65) is sleeved on the outer side of the inner tube (62), and the elastic member (65) is restricted by the limiting ring (64).

10. The hydraulic lock life reliability testing device according to claim 1, characterized in that: Two support plates (2) are provided at the top of the test bench (1) for temporarily supporting the hydraulic lock body (100); A push rod (22) is connected to one side of the support plate (2) and is used to drive the support plate (2) to move longitudinally.

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