Hydraulic lock service life reliability testing device

Abstract

The invention relates to the technical field of hydraulic lock testing, and discloses a hydraulic lock service life reliability testing device which comprises a testing table. The number of the load oil cylinders is two, the two load oil cylinders are arranged at the top end of the test board, and one load oil cylinder can slide relative to the test board; the two load oil cylinders are communicated with two oil ports in the top end of the hydraulic lock body respectively, and an oil outlet of one load oil cylinder is communicated with an oil inlet of the other load oil cylinder through a connecting pipe. The number of the hydraulic pumps is two, the two hydraulic pumps are arranged at the bottom end of the test board and communicate with the hydraulic lock body through reversing valves, and the other ends of the reversing valves are provided with external oil tanks through oil return pipes so that oil supply and oil return of two oil ways of the hydraulic lock body can be achieved. The hydraulic lock service life reliability testing device can effectively solve the problems that in the prior art, in the testing process, an oil pipe of a load oil cylinder is difficult to adapt to hydraulic locks with different hole pitches, and the testing work is not safe and reliable enough.

Description

Technical Field

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

[0002] The hydraulic lock is a hydraulic component that locks the flow of circuit oil to ensure that the cylinder remains stationary under the action of external force. It consists of two hydraulically controlled one-way valves to achieve oil interlocking and prevent the hydraulic cylinder from moving on its own due to load. It is mainly used for static locking of loads and is suitable for equipment such as truck crane outriggers and airport aerial platforms.

[0003] When testing a traditional hydraulic lock, it is necessary to install and connect the hydraulic lock's inlet and outlet interfaces with the load cylinder's inlet and outlet ports, so that the reliability of the hydraulic lock is reflected by the load cylinder. Since the hydraulic lock's inlet and outlet ports are often difficult to align with the load cylinder's inlet and outlet ports, the load cylinder's inlet and outlet ports are usually connected to the hydraulic lock using an oil pipe. If the oil pipe is a metal pipe, the interface of the load cylinder is fixed, making it difficult to adapt to hydraulic locks with different hole spacings. If the oil pipe is a flexible pipe, although it can adapt to the installation and connection of hydraulic locks with different hole spacings, it is easily damaged by external factors (such as wear, aging, high pressure in the pipe, etc.) during repeated testing, resulting in the hydraulic lock's testing work being unsafe and unreliable. Summary of the invention

[0004] In view of the above-mentioned shortcomings 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 pipe of the load cylinder is difficult to adapt to hydraulic locks with different hole spacings during the test and the testing work is not safe and reliable enough.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The hydraulic lock life reliability testing device comprises a test bench for carrying a hydraulic lock body to be tested, and also comprises: There are two load oil cylinders, both of which are arranged at the top of the test bench, and one of which can slide relative to the test bench; the two load oil cylinders are respectively connected to the two oil ports at the top of the hydraulic lock body, and the oil outlet of one load oil cylinder is connected to the oil inlet of the other load oil cylinder through a connecting pipe; There are two hydraulic pumps, which are arranged at the bottom of the test bench and are connected to the hydraulic lock body through a reversing valve. The other end of the reversing valve is equipped with an external oil tank through an oil return pipe to realize the oil supply and return of the two oil circuits of the hydraulic lock body.

[0006] Furthermore, it also includes: A load assembly, disposed at the top of the load cylinder, for providing a test load to the two load cylinders; Wherein, the load component comprises: A column, arranged on the top of the test bench; A top plate is connected to the top of the column, and both ends of the top plate are provided with load cylinders, in which a counterweight serving as a load cylinder load is placed.

[0007] Furthermore, the load component further comprises: A balance bar is arranged at the output ends of the two load cylinders, and the balance bar is rotatably arranged on one side of the column; The rotating arm is rotatably arranged at the end of the balancing rod, and the other end of the rotating arm is arranged toward the load cylinder. In the working state, the other end of the rotating arm is in contact with / connected with the counterweight in the load cylinder.

[0008] Furthermore, the column is arranged on the top of the test bench in a lateral sliding manner; A sliding sleeve is slidably arranged on one side of the load oil cylinder, a connecting rod is rotatably connected to the outer side of the sliding sleeve, and the other end of the connecting rod is rotatably arranged on the outer side of another load oil cylinder; A first sliding block is rotatably arranged at the intersection of the two connecting rods, and the first sliding block is vertically slidably arranged on one side of the column.

[0009] Furthermore, a through hole is opened at the top of the test bench, a first sealing sleeve is fixed to 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; It also includes a sealing assembly, which is arranged at the bottom end of the two load cylinders and one side of the through hole. The three sealing assemblies can slide relative to the test bench to be aligned with the remaining three oil ports of the hydraulic lock body respectively.

[0010] Furthermore, it also includes a moving component, which is slidably arranged on the top of the test bench in a transverse direction and is used to drive the sealing component to move so that the sealing component is aligned with the oil port of the hydraulic lock body.

[0011] Furthermore, the mobile component comprises: A slide seat is arranged on the top of the test bench in a lateral sliding manner; A first support plate, connected to the top end of the slide seat, for supporting one of the sealing assemblies; A second support plate is arranged on one side of the first support plate, and a sliding hole is opened on the inner side of the second support plate; A second sliding block is slidably disposed at the sliding hole and is used to support another sealing assembly; The sliding frame is arranged on the top of the test bench in a lateral sliding manner; and the third sealing component is connected to the sliding frame.

[0012] Furthermore, the mobile component also includes: A first linear member is disposed between the slide seat and the first support plate, and is used to drive the first support plate to move vertically; A second linear member is disposed between the slide seat and the second support plate, and is used to drive the second support plate to move vertically; The third linear member is arranged at the sliding frame and is used for driving the third sealing assembly to move vertically.

[0013] Furthermore, the bottom end of the sliding frame is connected to a first bearing plate, and the top end of the sliding frame is provided with a plurality of sliding pins; The corresponding sealing assembly is installed on the first installation block, the first installation block is installed on the top of the first bearing plate, a plurality of sliding pins are arranged through the first installation block, and the output end of the third straight member is connected to the first installation block.

[0014] Furthermore, 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; Pushing members are arranged on both sides of the top of the bottom plate, which are used to drive the test bench to rotate back and forth to both sides, so as to drive the moving assembly to move.

[0015] Further, the load cylinder is connected to the sealing assembly via a solenoid valve; Wherein, the sealing component comprises: A second sealing sleeve, one end of which is provided with an external thread for connecting with a corresponding component; An inner tube, slidably disposed inside the second sealing sleeve, with a portion of the inner tube extending out of the second sealing sleeve; A limiting ring connected to one side of the inner tube; The elastic member is sleeved on the outer side of the inner tube, and the elastic member is restricted by the limiting ring.

[0016] Furthermore, two support plates are provided at the top of the test bench for temporarily supporting the hydraulic lock body; One side of the support plate is connected with a push rod for driving the support plate to move longitudinally.

[0017] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: 1. The present invention is provided with two load oil cylinders to replace the traditional one oil cylinder, and the two oil cylinders are connected by a connecting pipe, so that the position of the load oil cylinder can be adjusted according to the two oil ports on the top of the hydraulic lock body, so that the test equipment can adapt to hydraulic lock bodies of different specifications, and the connecting pipe used to connect the load oil cylinder is in the low-pressure flow area of ​​the hydraulic oil, and will not be affected by the high pressure of the hydraulic oil, thereby ensuring the stability of the test equipment; 2. The present invention provides two load oil cylinders to replace the traditional oil cylinder. The two load oil cylinders are respectively installed corresponding to the two oil circuits inside the hydraulic lock body, so that the two oil circuits inside the hydraulic lock body can always be loaded during the oil supply and oil return process, so as to simulate the life reliability test of the hydraulic lock body under load conditions; 3. The load cylinder is connected to the hydraulic lock body by setting a sealing assembly, and the two right-angle tubes are connected through the first sealing sleeve and the sealing assembly on the top of the test bench. The other end of the right-angle tube is connected to a hydraulic pump for inputting hydraulic oil into the inside of the right-angle tube and then into the inside of the hydraulic lock body for testing. The test equipment is adjustable and a metal connection structure is used between the test equipment and the hydraulic lock body to prevent damage to the connection structure between the test equipment and the hydraulic lock body during the test, thereby affecting the stability of the test work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the internal structure of the hydraulic lock body in an embodiment of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 3 It is a structural schematic diagram of an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a support plate according to an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a mobile component according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of an adapter according to an embodiment of the present invention; Figure 7 It is a structural schematic diagram of a load assembly according to an embodiment of the present invention; Figure 8 It is a structural schematic diagram of a moving assembly and a load cylinder according to an embodiment of the present invention; Fig. 9 It is a structural schematic diagram of a load oil cylinder and a hydraulic lock body according to an embodiment of the present invention; Fig.10 This is a schematic diagram of the matching structure of the first sealing sleeve and the adapter according to an embodiment of the present invention; Fig.11 This is a schematic diagram of the assembly structure of the first sealing sleeve and the second sealing sleeve according to an embodiment of the present invention; Fig.12 It is a structural schematic diagram of a sealing assembly and a first mounting block according to an embodiment of the present invention; Fig.13 This is a schematic structural diagram of an explosion of a sealing assembly according to an embodiment of the present invention; Fig.14 It is a schematic diagram of the assembly structure of two load cylinders according to an embodiment of the present invention.

[0020] The reference numerals in the figure represent: 100, hydraulic lock body; 101, end cover; 102, sliding column; 103, blocking member; 104, spring; 200, adapter; 1. Test bench; 11. Through hole; 12. First sealing sleeve; 13. Slide groove; 14. First slide rail; 15. Right angle plate; 16. Bearing plate; 17. Bottom plate; 18. Pushing member; 19. Back plate; 2. Support plate; 21. Support platform; 22. Push rod; 3. Moving assembly; 31. Sliding seat; 32. First straight member; 33. First support plate; 34. Second straight member; 35. Second support plate; 351. Sliding hole; 36. First mounting block; 37. Second sliding block; 38. Second slide rail; 39. Sliding frame; 391. First bearing plate; 392. Sliding pin; 4. Load cylinder; 41. Connecting pipe; 42. Solenoid valve; 43. Roller; 44. Limit block; 45. Sliding sleeve; 46. Connecting rod; 47. First sliding block; 5. Load assembly; 51. Column; 52. Top plate; 53. Load cylinder; 54. Balance bar; 55. Rotating arm; 6. Sealing assembly; 61. Second sealing sleeve; 62. Inner tube; 63. Conical surface; 64. Limiting ring; 65. Elastic member; 7. Second mounting block; 71. Right-angle pipe; 72. Reversing valve; 73. Hydraulic pump; 74. Oil return pipe; 75. Third straight member; 76. Second bearing plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0022] In the specific explanation of the embodiment, the horizontal, vertical and vertical directions are based on Figure 2The directions shown in the figure are used for explanation only, and the directions here are only for the convenience of explaining the specific scheme and do not constitute any substantial limitation.

[0023] The structural principle diagram of the hydraulic lock body 100 involved in the embodiment of the present application is as follows Figure 1 As shown, the hydraulic lock body 100 is a prior art, and the description of the structural principle of the hydraulic lock body 100 here is to facilitate the understanding of the specific technical solution of the present application.

[0024] In order to facilitate the display of internal structure, Figure 1 The cross-sectional structure diagram of the part does not have some section lines added. Figure 1 As shown, the hydraulic lock body 100 includes two oil ports at the bottom (P oil port and Q oil port) and two oil ports at the top (M oil port and N oil port); end covers 101 are provided at both ends of the hydraulic lock body 100, and a sliding column 102 is slidably provided inside the hydraulic lock body 100; the end covers 101 on both sides are connected to sealing members 103 through springs 104.

[0025] During the routine test, 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 the hydraulic lock body through the oil circuit in the hydraulic lock body. Figure 1 At the sliding column 102 and the blocking member 103 on the left side shown in the figure, at this time, under the action of the hydraulic oil, the sliding column 102 and the blocking member 103 both move and move away from each other, and 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; Since the hydraulic oil pushes the sliding column 102 to move right when entering the left oil circuit, the sliding column 102 pushes the right blocking piece 103 to move right at this time, so that the right blocking piece 103 no longer blocks the right oil circuit, so that the hydraulic oil entering the hydraulic lock body 100 from the N oil port can pass through the right oil circuit and finally return from the Q oil port.

[0026] The principle of the hydraulic oil entering the hydraulic lock body 100 through the Q oil port for testing is the same as the above principle.

[0027] When the hydraulic oil is directly injected from the M oil port or the N oil port, the corresponding oil circuit is blocked by the blocking member 103, thereby locking the oil circuit and preventing oil from flowing in the circuit.

[0028] The present invention will be further described below in conjunction with the embodiments.

[0029] See also Figure 2-Figure 14The present invention provides a technical solution: a hydraulic lock life reliability test device, comprising a test bench 1, a support plate 2, a moving component 3, a load cylinder 4, a load component 5 and a sealing component 6. A through hole 11 is opened on the top of the test bench 1. A first sealing sleeve 12 is fixedly arranged on the top of the test bench 1 inside the through hole 11. The first sealing sleeve 12 is used to connect 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 component 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 on the test bench 1 in the horizontal direction. Top; the load cylinder 4 is located at the top of the moving component 3, and two load cylinders 4 are provided. The two load cylinders are respectively driven by the moving component 3 to align with the two oil ports on the top of the hydraulic lock body 100, and the oil outlet of one load cylinder 4 is connected with the oil inlet of the other load cylinder 4 through the connecting pipe 41; the load component 5 is located at the top of the load cylinder 4, and is used to provide test loads to the two load cylinders 4; the three sealing components 6 involved in the embodiment of the present application are respectively arranged at the bottom of the two load cylinders 4 and on one side of the through hole 11, and the sealing components 6 are respectively aligned with the remaining three oil ports on the upper and lower sides of the hydraulic lock body 100 by sliding.

[0030] In the embodiment of the present application, the hydraulic lock body is provided with a total of four oil ports, of which the bottom oil port is connected through the first sealing sleeve 12, and the remaining three oil ports are connected through the sealing assembly 6; the two oil ports at the bottom are connected to the hydraulic pump 73 or the external oil tank through the corresponding first sealing sleeve 12 or the sealing assembly 6, and the two oil ports at the top are connected to the corresponding load cylinder 4 through the sealing assembly 6.

[0031] A right-angle plate 15 is fixedly provided at the bottom of the test bench 1, a bearing plate 16 is rotatably provided on the outer side of the right-angle plate 15, a bottom plate 17 is fixedly provided at the bottom of the bearing plate 16, and a pushing member 18 is symmetrically fixedly provided on the top of the bottom plate 17. The pushing member 18 is used to drive the test bench 1 to reciprocate on both sides. The bearing plate 16 is located in the middle position of the outer side of the test bench 1, and a back plate 19 is fixedly provided on the outer side of the bottom plate 17 for protecting the load component 5 to ensure safety.

[0032] Among them, the moving component 3 relies on its own gravity to drive the two load cylinders 4 to slide on the top of the hydraulic lock body 100 during the rotation of the test bench 1, so that the two sealing components 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 component 6 relies on its own gravity to slide on the inner side of the through hole 11, which is used to automatically align the sealing component 6 with the oil port at the bottom end of the outer side of the hydraulic lock body 100.

[0033] The pushing member is a power member with a linear stroke, and may be a linear slide rail, a pneumatic drag rod, an electric push rod, etc. In the embodiment of the present application, a hydraulic push rod with a larger pushing force is selected.

[0034] The moving assembly 3 includes a slide 31, a first straight member 32, a second straight member 34 and a second slider 37. The slide 31 is slidably arranged on the top of the test bench 1 along the first slide rail 14; the first straight member 32 is fixedly arranged on the top of the slide 31, and a first support plate 33 is fixedly arranged on the top of the telescopic end of the first straight member 32, which is used to support one of the load cylinders 4; the second straight member 34 is fixedly arranged on the top of the slide 31, and a second support plate 35 is fixedly arranged on the top of the telescopic end of the second straight member 34, and a sliding hole 351 is opened on the inner side of the second support plate 35; the second slider 37 is slidably arranged on the inner side of the sliding hole 351, which is used to support another load cylinder 4.

[0035] The load assembly 5 includes a column 51 and a top plate 52. The column 51 is slidably set on the top of the second support plate 35 through the second slide rail 38. The second slide rail 38 is fixedly set on one side of the top of the second support plate 35. The column 51 slides with the two load cylinders 4 and is always located at the symmetry axis of the two load cylinders 4; the top plate 52 is fixedly set on the top of the column 51, and load cylinders 53 are fixedly set at both ends of the column 51 for placing counterweights as the load of the load cylinder 4.

[0036] A sliding sleeve 45 is axially slidably provided on the outside of the load cylinder 4, the sliding sleeve 45 is slidably provided on the outside of the limit block 44, the limit block 44 is fixedly provided on the outside of the corresponding load cylinder 4, a connecting rod 46 is rotatably provided on the outside of the sliding sleeve 45, and the other end of the connecting rod 46 is correspondingly rotatably provided on one side of the other load cylinder 4 / solenoid valve 42; the two connecting rods 46 are cross-arranged, and a first slider 47 is rotatably provided at the intersection of the two connecting rods 46, and the first slider 47 is slidably provided on the outside of the column 51.

[0037] A balance bar 54 is rotatably arranged on the outer side of the column 51, and rotating arms 55 are rotatably arranged at both ends of the balance bar 54. The other ends of the rotating arms 55 are tilted above the balance bar 54 and are located at the bottom of the load cylinder 53, so as to push the load inside the load cylinder 53; wherein, the balance bar 54 is in a balanced state in the initial state, and the bottom of the balance bar 54 is tilted due to the push of the two load cylinders 4, and a roller 43 is rotatably arranged on the top of the telescopic end of the load cylinder 4.

[0038] 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 another sealing assembly 6 is arranged on a sliding frame 39 through the first mounting block 36, and a hydraulic pump 73 is connected to one side of the sliding frame 39.

[0039] The sealing assembly 6 includes a second sealing sleeve 61, an inner tube 62 and an elastic member 65. The second sealing sleeve 61 is threadedly installed at the corresponding component, that is, the second sealing sleeve 61 of the two sealing assemblies 6 connected to the solenoid valve 42 is 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 on the top of the first mounting block 36; a conical surface 63 is provided on the inner side of the second sealing sleeve 61, and an adapter 200 is provided on the inner side of the conical surface 63. The adapter 200 can be detachably installed on the four oil ports on the outer side of the hydraulic lock body 100; the inner tube 62 is slidably arranged on the inner side of the second sealing sleeve 61, and the top end extends out of the top of the second sealing sleeve 61, a chamfered structure is provided on the top of the inner tube 62, and a limiting ring 64 is fixedly provided on the outer side of the inner tube 62; the elastic member 65 is sleeved on the outer side of the inner tube 62 and is limited by the corresponding limiting ring 64.

[0040] It is understandable that, in order to facilitate the cooperation between the first sealing sleeve 12 and the adapter 200 , a conical surface consistent with that of the second sealing sleeve 61 is also provided in the first sealing sleeve 12 .

[0041] In the above technical solution, the sliding frame 39 is slidably set along the sliding groove 13 on the top of the test bench 1, and a first bearing plate 391 is fixedly set at the bottom of the sliding frame 39, and the first bearing plate 391 is located below the through hole 11; sliding pins 392 are fixedly set on both sides of the sliding frame 39, and a first mounting block 36 is slidably set on the outer side of the sliding pin 392, and a third straight line member 75 for driving the first mounting block 36 to slide is fixedly set at the bottom of the first bearing plate 391, and a second bearing plate 76 for installing the hydraulic pump 73 is fixedly set on the outer side of the first mounting block 36, and the second bearing plate 76 is vertically slidably set on the outer side of the first bearing plate 391.

[0042] 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 adaptive choices based on actual needs and installation environment.

[0043] It also includes a second mounting block 7, which is fixedly arranged at the bottom of the first sealing sleeve 12; a right-angle tube 71 is fixedly arranged at the bottom of the first mounting block 36 and the second mounting block 7, a reversing valve 72 is fixedly arranged at the other end of the right-angle tube 71, a hydraulic pump 73 is fixedly arranged at the oil inlet end of the reversing valve 72, and an oil return pipe 74 is fixedly arranged at the oil outlet end of the reversing valve 72, and the other ends of the hydraulic pump 73 and the oil return pipe 74 are connected to the oil tank.

[0044] A support platform 21 is fixedly provided on one side of the support plate 2 close to the hydraulic lock body 100 , and a push rod 22 is provided on one side of the support plate 2 away from the hydraulic lock body 100 . The push rods 22 are fixedly provided on the top of the test bench 1 to drive the support plate 2 to move longitudinally.

[0045] Principle and advantages of hydraulic lock life reliability test device: First, according to the load-bearing capacity of the hydraulic lock body 100 to be tested, a counterweight of a certain mass is placed inside the load cylinder 53, and then the hydraulic lock body 100 is installed on the top of the test bench 1, so that the four oil ports of the hydraulic lock body 100 are respectively matched with the first sealing sleeve 12 and the 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 that the distance between the two load cylinders 4 is adjusted. At the same time, the two load cylinders 4 push and pull the two cross-arranged connecting rods 46 to rotate around the connecting axis, so that the upper connecting end of the connecting rod 46 drives the sliding sleeve 45 to slide vertically along the limit block 44, and at the same time, the connecting axis 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 symmetry axis of the two load cylinders 4, so that the load cylinder 53 supported by the column 51 is always symmetrically arranged above the load cylinder 4.

[0046] Then, one of the hydraulic pumps 73 is started (for the convenience of description, the hydraulic pump 73 at the bottom of the first sealing sleeve 12 is started by default) so that the hydraulic pump 73 inputs the hydraulic oil in the oil tank into the interior of 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 circuit state, so that the internal hydraulic oil of the hydraulic lock body 100 enters the interior of the load cylinder 4 through the solenoid valve 42, so that the hydraulic oil in the load cylinder 4 pushes the telescopic end to move upward, and then 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 rotation of one end of the balance rod 54 The boom 55 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 into the other load cylinder 4 through the connecting pipe 41 (the installation and principle of the piston inside the load cylinder 4 are both existing technologies and are not repeated 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 tube 71 through the bottom sealing assembly 6. At this time, the reversing valve 72 corresponding to the right-angle tube 71 connects the right-angle tube 71 with the return oil pipe 74, so that the hydraulic oil can be returned.

[0047] By the same principle, when the hydraulic pump 73 outside the second bearing plate 76 is started, another load cylinder 4 can cooperate with the load component 5 to implement testing, and then by alternately controlling the two reversing valves 72 and the hydraulic pump 73, the hydraulic lock body 100 can be tested for life reliability under load.

[0048] It is worth mentioning that the above installation method has the following advantages: Advantage 1: By setting two load cylinders 4 instead of a traditional cylinder, the two cylinders are connected by a connecting pipe 41, so that the position of the load cylinder 4 can be adjusted according to the two oil ports on the top of the hydraulic lock body 100, so that the test equipment can adapt to hydraulic lock bodies 100 of different specifications, and 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, thereby ensuring the stability of the test equipment.

[0049] Advantage two: by setting two load cylinders 4 instead of one traditional cylinder, the two load cylinders 4 are installed corresponding to the two oil circuits inside the hydraulic lock body 100 respectively, so that the two oil circuits inside the hydraulic lock body 100 can always be operated under load during the oil supply and oil return process, so as to simulate the life reliability test of the hydraulic lock body 100 under load conditions.

[0050] Advantage three, by setting up the load component 5 to provide a load for the load cylinder 4, the load weight inside the load cylinder 53 in the load component 5 can be adjusted according to the hydraulic lock body 100 of different specifications, and the balance rod 54 under the load cylinder 53 pushes the counterweight under the lifting action of the load cylinder 4, and the load can be transferred to the telescopic end of the load cylinder 4. At the same time, the center of the balance rod 54 can move with the load cylinder 4, so that the load component 5 can adapt to the testing work of hydraulic lock bodies 100 of different specifications.

[0051] Advantage four, the load cylinder 4 is connected to the hydraulic lock body 100 by setting a sealing assembly 6, and the two right-angle tubes 71 are connected through the first sealing sleeve 12 and the sealing assembly 6 on the top of the test bench 1, and the other end of the right-angle tube 71 is connected to a hydraulic pump 73, which is used to input the hydraulic oil into the right-angle tube 71, and then input it into the hydraulic lock body 100 for testing, so that the test equipment can be adjusted and 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.

[0052] 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, the adapter 200 is first installed correspondingly to the oil port of the hydraulic lock body 100. The shape of the outer side of the end of the adapter 200 cooperates with the conical surface 63 and belongs to a fixed specification size, while the other end cooperates with the oil port of different models of hydraulic lock bodies 100; the adapter 200 of corresponding specifications can be selected for installation according to the model of the hydraulic lock body 100. 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 adjusted to align with the first sealing sleeve 12; then, the two pushers 18 on the top of the control base plate 17 are raised and lowered, so that the test bench 1 reciprocates around the outer connecting shaft.

[0053] Specifically, the slide 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 slide 31 slides along the first slide rail 14 in the direction away from the A end, so that the slide 31 drives the load cylinder 4 on the top of the first support plate 33 to move toward the adapter 200 close to the A end of the hydraulic lock body 100, until the sealing component 6 at the bottom of the load cylinder 4 and the adapter 200 are aligned with each other, at this time the slide 31 is unable to continue to slide due to the resistance of the sealing component 6 and the adapter 200, and then the test bench 1 is moved closer to the adapter 200 The side near the A end is rotated so that the test bench 1 drives the sealing assembly 6 on the inner side of the through hole 11 to approach another adapter 200 at the bottom of the hydraulic lock body 100 until they are aligned. At this time, since the slide seat 31 cannot slide, the second slide block 37 drives the load cylinder 4 to approach another load cylinder 4, and at the same time, the load cylinder 4 drives the corresponding sealing assembly 6 to approach and align with another adapter 200 at the top of the hydraulic lock body 100, and then the sealing assembly 6 is automatically assembled on the outside of the top oil port of the hydraulic lock body 100 by reciprocating the test bench 1.

[0054] Among them, during the process of the sealing component 6 cooperating and aligning with the adapter 200, the inner tube 62 located on the inner side of the second sealing sleeve 61 contacts with the conical surface on the outer side of the adapter 200, and the limiting ring 64 on the outer side of the inner tube 62 compresses the elastic member 65 under the extrusion action. When the inner tube 62 moves to the hole position of the adapter 200, it is automatically inserted into the interior 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 with the adapter 200, so as to prevent interference with the movement and alignment action. After the two sealing components 6 at the top are aligned with the corresponding adapter 200, the corresponding sealing components 6 are driven by the first straight member 32 and the second straight member 34 to move toward the adapter 200 again, so as to realize the sealed connection between the adapter 200 and the sealing component 6.

[0055] It is worth mentioning that the above installation method has the following advantages: Advantage 1: By setting the adapter 200 and the hydraulic lock body 100 to be detachable, and making the shape of the adapter 200 match the tapered surface 63, the adapter 200 can be installed on the outside of hydraulic lock bodies 100 of different specifications to have tapered surfaces of the same specifications, so that the sealing assembly 6 on the test equipment can adapt to the test work of hydraulic lock bodies 100 of different specifications; Advantage 2: The test bench 1 is driven to reciprocate on the top of the bottom plate 17 by the pusher 18, so that the test bench 1 first drives one of the load cylinders 4 to automatically align with an oil port on the top of the hydraulic lock body 100, and then drives the other load cylinder 4 and the sealing component 6 on the inner side of the through hole 11 to automatically align with the remaining oil ports of the hydraulic lock body 100, so that the oil ports on the outer side of the hydraulic lock body 100 are correspondingly assembled on the test equipment, preventing the hydraulic lock body 100 from being inconvenient to install due to its large mass and volume, thereby improving the convenience of use; Advantage three: by setting the slide 31 to support the two load cylinders 4 and the load assembly 5, when the test bench 1 drives the first slide rail 14 to tilt, the slide 31 keeps sliding smoothly under the gravity of the load cylinder 4 and the load assembly 5, and the power generated by the sliding can be used to drive the sealing assembly 6 to automatically align with the adapter 200, and after the inner tube 62 is inserted into the adapter 200, the sealing assembly 6 is locked with the corresponding adapter 200 through the first straight member 32, the second straight member 34 and the third straight member 75, so as to ensure the smooth docking operation; Advantage 4: When the test bench 1 is tilted for the first time, one of the load cylinders 4 can be automatically aligned with the adapter 200. When the test bench 1 is tilted for the second time, the other load cylinder 4 slides along the slide hole 351 driven by the load assembly 5. Specifically, the load assembly 5 slides along the second slide rail 38 by its own gravity, thereby driving the cross-arranged connecting rods 46 to contract, so that the connecting rods 46 drive the load cylinders 4 to move closer to the top of the hydraulic lock body 100, so as to ensure the stability of the two load cylinders 4 when the two sides move and align. Advantage five: During the alignment of the sealing assembly 6 with the adapter 200, the inner tube 62 located inside the second sealing sleeve 61 is squeezed, slid and contracted by the conical surface of the adapter 200. When the inner tube 62 is inserted into the adapter 200, the conical outer side surface on the outside of the adapter 200 cooperates with the inner conical surface 63 of the second sealing sleeve 61 to achieve a sealed connection between the adapter 200 and the sealing assembly 6.

[0056] In practical applications, the sealing method of the sealing component 6 and the adapter 200 is as follows: On the basis of the alignment of the sealing assembly 6 and the adapter 200, the support plate 2 is first driven away from the hydraulic lock body 100 by 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 and the sealing assembly 6 at the bottom, and then the first straight member 32 and the second straight member 34 at the top of the slide seat 31 respectively drive the two load cylinders 4 to press against the top of the hydraulic lock body 100 to achieve a sealed connection between the top adapter 200 and the sealing assembly 6. Under the action of pressure, the adapter 200 at the bottom of the hydraulic lock body 100 is sealed and connected with the first sealing sleeve 12. Finally, the right-angle tube 71 is driven upward by the third straight member 75, so that the right-angle tube 71 pushes the first mounting block 36 to slide along the sliding pin 392, thereby driving the sealing assembly 6 at the top of the first mounting block 36 to be pressed against the bottom of the hydraulic lock body 100 and sealedly docked with the adapter 200; it should be noted that during the sliding process, the sliding frame 39 relies on the gravity of components such as the hydraulic pump 73 and the third straight member 75 to move.

[0057] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to 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 (1) 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). 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 the two oil circuits of the hydraulic lock body (100).

2. The hydraulic lock life reliability testing device according to claim 1 is characterized in that: Also includes; 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 upright column (51), and load cylinders (53) are provided at both ends of the top plate (52). A counterweight serving as the load of the load cylinder (4) is placed in the load cylinder (53).

3. The hydraulic lock life reliability testing device according to claim 2 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).

4. The hydraulic lock life reliability testing device according to claim 2 is characterized in that: The upright column (51) is arranged on the top of the test bench (1) in a lateral sliding manner; A sliding sleeve (45) is slidably disposed on one side of the load oil cylinder (4), the outer side of the sliding sleeve (45) is rotatably connected to a connecting rod (46), and the other end of the connecting rod (46) is rotatably disposed on the outer side of another load oil cylinder (4); A first sliding block (47) is rotatably disposed at the intersection of the two connecting rods (46), and the first sliding block (47) is vertically slidably disposed on one side of the column (51).

5. 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.

6. The hydraulic lock life reliability testing device according to claim 5 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).

7. The hydraulic lock life reliability testing device according to claim 6 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).

8. The hydraulic lock life reliability testing device according to claim 7 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.

9. The hydraulic lock life reliability testing device according to claim 8, 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).

10. The hydraulic lock life reliability testing device according to claim 7, 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.

11. The hydraulic lock life reliability testing device according to claim 5, 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).

12. 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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