Valve body fixing mechanism for electro-hydraulic servo valve test bed

Abstract

The utility model relates to a valve body fixing mechanism for an electro-hydraulic servo valve test bench, which belongs to the technical field of electro-hydraulic servo valve test benches and comprises a protection bench, a test bench is slidably connected to the front of the protection bench, and a fixing mechanism is arranged on the front of the test bench. The fixing mechanism comprises a mounting plate which is fixedly connected to the top of the test bed. According to the valve body fixing mechanism for the electro-hydraulic servo valve test bed, when an electro-hydraulic servo valve is fixed, a hydraulic rod is started to drive the test bed to move, an auxiliary clamping plate on the outer surface of a limiting rod is used for preliminarily fixing the electro-hydraulic servo valve, so that limiting in the left-right direction is achieved, and then a motor is started to drive a screw to rotate; the movable block moves towards the side away from the auxiliary clamping plate under the condition that the sleeve is arranged, the swing arm is driven to move up and down, then the electro-hydraulic servo valve is fixed in the up-down direction through the clamping plate, the operation time is shortened when the electro-hydraulic servo valve is fixed, and the stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electro-hydraulic servo valve test benches, in particular to a valve body fixing mechanism for an electro-hydraulic servo valve test bench. Background Art

[0002] The electro-hydraulic servo valve is a key component in electro-hydraulic servo control. It is a hydraulic control valve that receives an analog electrical signal and outputs a modulated flow and pressure. Due to its fast dynamic response, high control accuracy, and long service life, it is widely used in electro-hydraulic servo control systems in aviation, aerospace, shipbuilding, metallurgy, and chemical industries. Electro-hydraulic servo valves require inspection and maintenance before use, which requires a test bench for operation.

[0003] According to Chinese patent CN220268094U, an improved valve body fixing device for a test bench is first placed on top of a base plate. Since the base is typically a cubic design, the fixing mechanism can be adjusted accordingly based on the size of the base. By rotating the threaded rod, the two movable blocks can be moved relative to or away from each other within the constraints of the threaded through-hole until they are the same length as the base of the valve. The front and rear clamps are then pulled to the same width as the base of the valve. Under the action of a spring, the clamps are tightened inward to secure valves of varying sizes. This clamping method provides a wide range of fixings and good adaptability. When oil overflows from the valve during testing, it drips through the leak hole into the collection frame. The inclined block better directs the oil into the outlet pipe, where it is ultimately discharged, effectively collecting the oil.

[0004] When the above device is used to fix the electro-hydraulic servo valve, it is necessary to manually twist the threaded rod to drive the movable block to move relative to it, thereby achieving the purpose of fixing the electro-hydraulic servo valve. The splint is connected by a spring and relies on elastic force for loosening and fixing. It has poor stability during use. The manual operation method is not conducive to saving the time required for the fixing operation, so as to improve the work efficiency of subsequent tests. Therefore, a valve body fixing mechanism for an electro-hydraulic servo valve test bench is proposed to solve the above problems. Utility Model Content

[0005] In response to the deficiencies in the prior art, the utility model provides a valve body fixing mechanism for an electro-hydraulic servo valve test bench, which has the advantages of being more convenient, reliable, and more stable when fixing the electro-hydraulic servo valve. It solves the problem of needing to manually twist the threaded rod to drive the moving block to move relative to each other, thereby achieving the purpose of fixing the electro-hydraulic servo valve. The splint adopts a spring connection method, relying on elastic force for loosening and fixing, which has poor stability during use. The manual operation method is not conducive to saving the time required for the fixing operation, thereby improving the work efficiency of subsequent tests.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a valve body fixing mechanism for an electro-hydraulic servo valve test bench, comprising a protective platform, the front face of which is slidably connected to a test bench, and a fixing mechanism provided on the front face of the test bench;

[0007] The fixing mechanism includes a mounting plate, which is fixedly connected to the top of the test bench, an outer surface of the mounting plate is fixedly connected to a motor, one end of the output shaft of the motor is fixedly connected to a screw, an outer surface of the screw is threadedly connected to a moving block, an outer surface of the moving block is fixedly connected to a connecting plate, an outer surface of the mounting plate is fixedly connected to a limiting rod, a right side of the mounting plate is fixedly connected to a fixing column, a front side of the fixing column is hingedly connected to a swing arm, an internal rotation of the swing arm is connected to a connecting rod, a right side of the swing arm is detachably connected to a splint, and an outer surface of the limiting rod is detachably connected to an auxiliary splint.

[0008] Furthermore, a guide block is provided inside the protective platform, and the test platform slides inside the protective platform through the guide block. A hydraulic rod is fixedly connected to the inside of the protective platform, and the telescopic end of the hydraulic rod is fixedly connected to the bottom of the test platform.

[0009] Furthermore, a downflow hole is opened inside the protective platform, a collecting box is fixedly connected to the bottom of the protective platform, and a drainage pipe is fixedly connected to the right side of the collecting box.

[0010] Furthermore, a first bolt is passed through the interior of the mounting plate, the fixing column is fixed to the mounting plate via the first bolt, a rotating column is rotatably connected to the interior of the fixing column, and the swing arm is hinged to the fixing column via the rotating column.

[0011] Furthermore, a sliding hole is provided inside the moving block, and the moving block is slidably connected to the limiting rod through a sliding groove, and the side of the connecting rod away from the swing arm is rotationally connected to the moving block.

[0012] Furthermore, the outer surface of the splint is elastically connected to a pin, and the splint is detachably connected to the swing arm through the pin. The outer surface of the auxiliary splint is provided with arc-shaped teeth, and a second bolt is passed through the interior of the auxiliary splint, and the auxiliary splint is detachably connected to the limit rod through the second bolt.

[0013] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0014] 1. The electro-hydraulic servo valve test bench uses a valve body fixing mechanism. When the electro-hydraulic servo valve is being fixed, the test bench is driven to move by starting the hydraulic rod, and the auxiliary splint on the outer surface of the limit rod is used to preliminarily fix the electro-hydraulic servo valve, thereby achieving the limit in the left and right directions. Then the motor is started to drive the screw to rotate. With the sleeve, the moving block moves to the side away from the auxiliary splint, driving the swing arm to move up and down, thereby allowing the splint to fix the electro-hydraulic servo valve in the up and down directions, thereby reducing the operation time and improving the stability when the electro-hydraulic servo valve is fixed.

[0015] 2. The valve body fixing mechanism of the electro-hydraulic servo valve test bench is designed to be bilaterally symmetrical. When fixing the electro-hydraulic servo valve, it can better and more stably adapt to electro-hydraulic servo valves of different specifications, thereby ensuring that the time spent on the fixing operation is minimized and improving the work efficiency of subsequent tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the main cross-sectional view of the structure of the utility model;

[0017] Figure 2 This is a side view of the structure of the utility model;

[0018] Figure 3 This is a partial view of the structure of the utility model.

[0019] In the figure: 1. Protective platform; 2. Hydraulic rod; 3. Test bench; 4. Mounting plate; 5. Motor; 6. Screw; 7. Moving block; 8. Connecting plate; 9. Limiting rod; 10. Fixed column; 11. Swing arm; 12. Connecting rod; 13. Clamp; 14. Auxiliary clamp; 15. Downflow hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 3 In this embodiment, a valve body fixing mechanism for an electro-hydraulic servo valve test bench includes a protective platform 1, the front of the protective platform 1 is slidably connected to a test bench 3, a guide block is provided inside the protective platform 1, and the test bench 3 slides inside the protective platform 1 through the guide block, and a hydraulic rod 2 is fixedly connected inside the protective platform 1, and the telescopic end of the hydraulic rod 2 is fixedly connected to the bottom of the test bench 3.

[0022] A downflow hole 15 is provided inside the protection platform 1 , a collecting box is fixedly connected to the bottom of the protection platform 1 , and a drainage pipe is fixedly connected to the right side of the collecting box.

[0023] The front of the test bench 3 is provided with a fixing mechanism; the fixing mechanism includes a mounting plate 4, which is fixedly connected to the top of the test bench 3, and the outer surface of the mounting plate 4 is fixedly connected to a motor 5, one end of the output shaft of the motor 5 is fixedly connected to a screw 6, the outer surface of the screw 6 is threadedly connected to a moving block 7, the outer surface of the moving block 7 is fixedly connected to a connecting plate 8, and the outer surface of the mounting plate 4 is fixedly connected to a limit rod 9.

[0024] A fixing column 10 is fixedly connected to the right side of the mounting plate 4, and a swing arm 11 is hinged on the front of the fixing column 10. A first bolt is passed through the inside of the mounting plate 4, and the fixing column 10 is fixed to the mounting plate 4 through the first bolt. The inside of the fixing column 10 is rotatably connected to a rotating column, and the swing arm 11 is hinged to the fixing column 10 through the rotating column.

[0025] The swing arm 11 is internally rotatably connected with a connecting rod 12, a sliding hole is opened inside the moving block 7, the moving block 7 is slidingly connected to the limit rod 9 through a sliding groove, and the connecting rod 12 is rotatably connected to the moving block 7 on the side away from the swing arm 11.

[0026] The right side of the swing arm 12 is detachably connected to a clamping plate 13 , an outer surface of the clamping plate 13 is elastically connected to a latch, and the clamping plate 13 is detachably connected to the swing arm 11 via the latch.

[0027] The outer surface of the limiting rod 9 is detachably connected to an auxiliary splint 14 , the outer surface of the auxiliary splint 14 is provided with arc-shaped teeth, and a second bolt is passed through the interior of the auxiliary splint 14 , and the auxiliary splint 14 is detachably connected to the limiting rod 9 through the second bolt.

[0028] In this embodiment, by setting the test bench 2 to a left-right symmetrical design, when fixing the electro-hydraulic servo valve, it can better and more stably adapt to electro-hydraulic servo valves of different specifications, thereby ensuring that the time spent on the fixing operation is minimized, thereby improving the work efficiency of subsequent tests.

[0029] In this embodiment, the interior of the protective platform 1 adopts an inclined design to ensure that when the electro-hydraulic servo valve overflows oil during the test, it drips into the collection frame through the oil leakage hole. Under the action of the inclined surface, it can be gathered inside the collection box and then processed, further improving the convenience of use.

[0030] The working principle of the above embodiment is:

[0031] The electro-hydraulic servo valve test bench uses a valve body fixing mechanism. When the electro-hydraulic servo valve is being fixed, the test bench 3 is driven to move by starting the hydraulic rod 2, and the electro-hydraulic servo valve is initially fixed by using the auxiliary splint 14 on the outer surface of the limit rod 9, thereby achieving the limit in the left and right directions, and then the motor 5 is started to drive the screw 6 to rotate. The moving block 8 moves to the side away from the auxiliary splint 14 with the sleeve 7, driving the swing arm 11 to move up and down, and then the splint 13 fixes the electro-hydraulic servo valve in the up and down directions, thereby reducing the operation time and improving the stability of the electro-hydraulic servo valve when it is fixed.

[0032] It should be noted that the standard parts used in the application can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt mature bolts, rivets, welding, etc. in the existing technology, and conventional means. Machinery, parts and equipment all adopt conventional models in the existing technology; plus the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve body fixing mechanism for an electro-hydraulic servo valve test bench, comprising a protective platform (1), characterized in that: The front of the protection platform (1) is slidably connected to a test platform (3), and the front of the test platform (3) is provided with a fixing mechanism; The fixing mechanism includes a mounting plate (4), the mounting plate (4) is fixedly connected to the top of the test bench (3), the outer surface of the mounting plate (4) is fixedly connected to a motor (5), one end of the output shaft of the motor (5) is fixedly connected to a screw (6), the outer surface of the screw (6) is threadedly connected to a moving block (7), the outer surface of the moving block (7) is fixedly connected to a connecting plate (8), the outer surface of the mounting plate (4) is fixedly connected to a limiting rod (9), the right side of the mounting plate (4) is fixedly connected to a fixing column (10), the front of the fixing column (10) is hinged with a swing arm (11), the inner part of the swing arm (11) is rotatably connected to a connecting rod (12), the right side of the swing arm (11) is detachably connected to a splint (13), and the outer surface of the limiting rod (9) is detachably connected to an auxiliary splint (14).

2. The valve body fixing mechanism for an electro-hydraulic servo valve test bench according to claim 1, characterized in that: A guide block is provided inside the protective platform (1), and the test platform (3) slides inside the protective platform (1) via the guide block. A hydraulic rod (2) is fixedly connected inside the protective platform (1), and the telescopic end of the hydraulic rod (2) is fixedly connected to the bottom of the test platform (3).

3. The valve body fixing mechanism for an electro-hydraulic servo valve test bench according to claim 1, characterized in that: A downflow hole (15) is provided inside the protection platform (1), a collection box is fixedly connected to the bottom of the protection platform (1), and a drainage pipe is fixedly connected to the right side of the collection box.

4. The valve body fixing mechanism for an electro-hydraulic servo valve test bench according to claim 1, characterized in that: A first bolt is passed through the interior of the mounting plate (4), the fixing column (10) is fixed to the mounting plate (4) via the first bolt, the interior of the fixing column (10) is rotatably connected to a rotating column, and the swing arm (11) is hinged to the fixing column (10) via the rotating column.

5. The valve body fixing mechanism for an electro-hydraulic servo valve test bench according to claim 1, characterized in that: A sliding hole is provided inside the moving block (7), and the moving block (7) is slidingly connected to the limiting rod (9) through a sliding groove. The connecting rod (12) is rotationally connected to the moving block (7) on the side away from the swing arm (11).

6. The valve body fixing mechanism for an electro-hydraulic servo valve test bench according to claim 1, characterized in that: The outer surface of the splint (13) is elastically connected with a latch, and the splint (13) is detachably connected to the swing arm (11) via the latch; the outer surface of the auxiliary splint (14) is provided with arc-shaped teeth, and a second bolt is passed through the interior of the auxiliary splint (14); the auxiliary splint (14) is detachably connected to the limit rod (9) via the second bolt.

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