A quick clamping device and method for hydraulic rudder mode test

Abstract

The application discloses a quick clamping device for hydraulic rudder motor modal testing, and relates to the technical field of rudder motor testing.The quick clamping device comprises a track, a pressing plate seat is detachably installed on the track through bolts, a rudder motor fixing module, a stop fixing module and an oil cylinder fixing module are also detachably installed on the track through the pressing plate seat, a test oil cylinder is further arranged on the oil cylinder fixing module and transmissionally connected with the rudder motor fixing module, a positioning disc is fixedly installed on the rudder motor fixing module, a through hole for a rudder handle column to pass through is further arranged on the positioning disc, a key groove is further arranged on the positioning disc, and an adjustable distance positioning seat is detachably installed on the positioning disc through bolts.In use, the positions of the modules can be adjusted through the track, the pressing plate seat and the adjustable distance groove, special tooling does not need to be reprocessed and customized for different types of rudder motors, the installation stations of the rudder motor fixing module, the stop fixing module and the oil cylinder fixing module can be quickly adjusted, and the modal testing operation of various specifications of hydraulic rudder motors can be adapted.

Description

Technical Field

[0001] This invention relates to the field of servo motor testing technology, and specifically to a quick clamping device and method for modal testing of hydraulic servo motors. Background Technology

[0002] Modal testing of servo motors is an important experimental method for obtaining dynamic characteristics such as natural frequency, damping ratio, and mode shape of hydraulic servo motors. Through modal testing, the dynamic response characteristics of servo motors can be understood, providing key experimental basis for servo motor structure optimization, vibration fault diagnosis, and overall reliability design. It is an indispensable testing procedure in the research and development and mass production testing of hydraulic servo motors.

[0003] Currently, there are many types of hydraulic servo motors. Most existing modal testing clamping devices adopt a dedicated custom tooling structure. One set of tooling can only be used for a single specification of hydraulic servo motor. The entire set of tooling mainly consists of a dedicated base, positioning support, clamping components, and other parts. For each new model of servo motor developed, the corresponding matching clamping tooling needs to be redesigned and manufactured. When carrying out modal testing, the operator needs to hoist or move the servo motor to be tested to the installation position of the corresponding custom tooling. The positioning support of the tooling is used to complete the alignment of the servo motor. Then, the clamping components are used to complete the multi-point locking and fixing. After clamping, the excitation equipment and sensor acquisition equipment are connected. The servo motor is driven by hydraulic action to carry out signal acquisition.

[0004] During testing, the clamping devices mostly use special custom tooling structures. Existing special custom tooling has poor compatibility. Different models of hydraulic servos require the manufacture of dedicated tooling, which is costly. When switching between multiple types of servos for testing, the test tooling needs to be completely disassembled and replaced, which is time-consuming. Furthermore, when performing servo shaft deflection tests, it is difficult to ensure that the rotation axis is in the exact center of the test area. This can easily cause the rotation axis to become skewed, affecting the test results. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a quick clamping device and method for modal testing of hydraulic servo motors. The problem to be solved is that existing modal testing of hydraulic servo motors uses special custom-made tooling, which has poor adaptability. Different models of servo motors require separate tooling, and the tooling disassembly, assembly, replacement and debugging are time-consuming. In addition, the rotating shaft is difficult to align during servo motor shaft deflection testing, and it is easy to cause skew.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a quick clamping device for modal testing of hydraulic servo motors, comprising a rail, on which a pressure plate seat is detachably installed by bolts, and on which a servo motor fixing module, a stop fixing module, and a hydraulic cylinder fixing module are detachably installed by the pressure plate seat respectively, wherein the stop fixing module is located between the servo motor fixing module and the hydraulic cylinder fixing module, and the hydraulic cylinder fixing module is further provided with a test hydraulic cylinder that is drively connected to the servo motor fixing module; A positioning plate is fixedly installed on the servo motor fixing module. The positioning plate also has a through hole for the rudder stick to pass through. The positioning plate has a through shaft hole arranged concentrically with the rudder stick. The positioning plate has keyways arranged in a ring array around the rudder stick. An adjustable positioning seat is also installed on the positioning plate by bolts. The adjustable positioning seat is arranged in a ring array along the rudder stick through the keyways.

[0008] As a preferred embodiment of the quick clamping device for hydraulic servo modal testing described in this invention, the through-shaft hole is arranged in a cross shape on the positioning plate, and the adjustable positioning seat is slidably arranged along the corresponding keyway, and the spacing between the relatively arranged adjustable positioning seats corresponds to the diameter of the servo stick.

[0009] As a preferred embodiment of the quick clamping device for modal testing of hydraulic servo motors according to the present invention, wherein: a first positioning block and a second positioning block are respectively installed on the adjustable positioning seat by bolts, the second positioning block is located on the side of the adjustable positioning seat facing the through shaft hole, the adjustable positioning seat is fixedly installed in the keyway by bolts on the first positioning block, and the end of the adjustable positioning seat facing the through shaft hole is rounded.

[0010] As a preferred embodiment of the quick clamping device for modal testing of hydraulic servo motors according to the present invention, wherein: a fisheye head is rotatably connected to the second positioning block via a bearing, one end of the fisheye head extends outside the adjustable positioning seat, and the second positioning block is detached and installed on the adjustable positioning seat by bolts, and is coaxially arranged with the first positioning block.

[0011] As a preferred embodiment of the quick clamping device for modal testing of hydraulic servo motors according to the present invention, the servo motor fixing module has a stop groove on the side away from the positioning plate, and the stop fixing module is disassembled and installed on the stop groove by bolts.

[0012] As a preferred embodiment of the quick clamping device for modal testing of hydraulic steering gear according to the present invention, wherein: a support column is fixedly installed on the cylinder fixing module, a support hinge seat is fixedly installed at one end of the test cylinder, a rudder hinge seat is fixedly installed on the piston rod of the test cylinder, the test cylinder is hingedly connected to the support column and the rudder column through the support hinge seat and the rudder hinge seat respectively, and the support hinge seat and the rudder hinge seat are also provided with threaded pins that pass through.

[0013] As a preferred embodiment of the quick clamping device for hydraulic servo motor modal testing described in this invention, a protective stop is fixedly installed on the stop fixing module. The protective stop is V-shaped and its opening faces the servo stick column. The protective stop is also provided with a servo stick detection probe for monitoring the deflection of the positioning disk.

[0014] As a preferred embodiment of the quick clamping device for hydraulic servo motor modal testing described in this invention, the servo motor fixing module, the stop fixing module, and the hydraulic cylinder fixing module are arranged sequentially along the length of the track, and each of the servo motor fixing module, the stop fixing module, and the hydraulic cylinder fixing module is provided with lifting lugs for hoisting.

[0015] As a preferred embodiment of the quick clamping device for modal testing of hydraulic servo motors according to the present invention, the track is provided with an adjustment groove along its length direction, the pressure plate seat is provided with a locking surface that fits against the side of the track, the pressure plate seat is also provided with a locking groove that matches the edge of the track below, and each pressure plate seat is provided with a screw hole that matches the adjustment groove. The pressure plate seats are respectively fixedly installed on the corresponding adjustment groove by bolts.

[0016] A method for using a quick clamping device for modal testing of hydraulic servos includes the following steps: Step 1: When the device is needed, first fix the track to the test platform with the help of the pressure plate seat. According to the size of the hydraulic servo motor to be tested and the test requirements, adjust the position of the pressure plate seat on the adjustment groove. After guiding and positioning, tighten the bolts to complete the installation of the servo motor fixing module, the stop fixing module, and the cylinder fixing module. Step two: Pass the shaft of the hydraulic servo motor under test through the through hole of the positioning plate, slide the adjustable positioning seat along the keyway to the appropriate clamping size, and tighten the bolt of the first positioning block so that the fisheye head contacts the outer wall of the servo motor to achieve position compensation. Step 3: Hinge the test cylinder to the support column and the rudder column respectively, insert the threaded pin limiter, adjust the position of the stop fixing module and lock it, and connect the external acquisition system to put the rudder detection probe into the ready state. Step 4: Start the test cylinder to drive the rudder stick to deflect the servo motor under test. The rudder stick detection probe collects the deflection signal. The V-shaped protective stop performs overtravel limit to complete the modal test. Step 5: After the test is completed, remove the threaded pins and all locking bolts, loosen the adjustable positioning seat, remove the servo, adjust the position of the components, and then you can start testing the next servo to be tested.

[0017] In summary, the present invention has at least one of the following beneficial effects: 1. This invention achieves adjustable position of each module through the use of rails, pressure plates, and adjustable slots. It eliminates the need for custom-made tooling for different models of servo motors and enables quick adjustment of the installation positions of the servo motor fixing module, stop fixing module, and cylinder fixing module. It is suitable for modal testing of various specifications of hydraulic servo motors.

[0018] 2. The present invention, through the positioning plate, keyway, adjustable positioning seat and fisheye head adaptive compensation structure, can eliminate the position deviation caused by clamping and ensure the centering of the servo motor rotation axis.

[0019] 3. This invention, through the V-shaped protective stop, the rudder detection probe, and the threaded pin limiting structure at the hinge, can not only collect the rudder deflection angle signal in real time, but also achieve physical protection functions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a frontal view of the present invention; Figure 3 This is a structural diagram showing the assembly of the servo motor fixing module and the stop fixing module of the present invention. Figure 4 This is a structural diagram showing the installation of the hydraulic cylinder fixing module and the test hydraulic cylinder according to the present invention. Figure 5 This is a structural diagram of the servo motor fixing module of the present invention; Figure 6 This is a structural diagram showing the installation of the positioning disk and the adjustable positioning seat according to the present invention. Figure 7 This is a structural diagram of the adjusting positioning seat of the present invention; Figure 8 This is a structural diagram of the pressure plate seat of the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Track; 11. Adjustable pitch groove; 2. Pressure plate seat; 21. Engaging surface; 22. Engaging groove; 3. Servo mounting module; 31. Positioning plate; 311. Through shaft hole; 312. Keyway; 32. Adjustable pitch positioning seat; 321. First positioning block; 322. Second positioning block; 3221. Fisheye head; 33. Steering stick; 34. Stop groove; 4. Stop fixing module; 41. Protective stop; 411. Steering stick detection probe; 5. Hydraulic cylinder fixing module; 51. Support column; 6. Test hydraulic cylinder; 61. Support hinge seat; 62. Steering stick hinge seat; 7. Lifting lug. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This invention discloses a quick clamping device and method for modal testing of hydraulic servo motors. Example

[0025] Reference Figure 1-8 This invention provides a first embodiment of a rapid clamping device and method for modal testing of a hydraulic servo motor. The rapid clamping device includes a track 1, on which a pressure plate seat 2 is detachably mounted via bolts. A servo motor fixing module 3, a stop fixing module 4, and a cylinder fixing module 5 are also detachably mounted on the track 1 via the pressure plate seat 2. The stop fixing module 4 is located between the servo motor fixing module 3 and the cylinder fixing module 5. The cylinder fixing module 5 is also equipped with a test cylinder 6 that is drively connected to the servo motor fixing module 3. A positioning plate 31 is fixedly mounted on the servo motor fixing module 3. The positioning plate 31 has a through hole for the servo stick 33 to pass through, and a through shaft hole 311 arranged concentrically with the servo stick 33. The device is equipped with keyways 312 arranged in a ring around the rudder post 33. An adjustable positioning seat 32 is also installed on the positioning plate 31 by bolts. The adjustable positioning seat 32 is arranged in a ring along the rudder post 33 through the keyways 312. The track 1 can be fixed to the platform by the pressure plate seat 2 as the basic load-bearing body of the entire device. The pressure plate seat 2 locks the position of each module on the track 1. The installation position of the rudder fixing module 3, the stop fixing module 4, and the cylinder fixing module 5 can be adjusted according to the external dimensions of the rudder post 33 of the rudder to be tested. The test cylinder 6 outputs driving force to simulate the actual working load of the rudder. The positioning plate 31 provides pre-positioning for the rudder. The rudder post 33 transmits the driving torque of the cylinder. The through-shaft hole 311 allows the rudder shaft to pass through. The keyway 312 provides sliding guidance for the adjustable positioning seat 32.

[0026] The through-shaft hole 311 is arranged in a cross shape on the positioning plate 31, and the adjustable positioning seat 32 is slidably arranged along the corresponding keyway 312. The spacing between the relatively arranged adjustable positioning seats 32 corresponds to the diameter of the rudder post 33. The cross-shaped through-shaft hole 311 can avoid the swing stroke of the servo shaft in different directions. The adjustable positioning seat 32 can change the positioning clamping range by sliding along the keyway 312 to adapt to rudder posts 33 with different outer diameter specifications, ensuring that the clamping center coincides with the center of the rudder post 33 and avoiding clamping eccentricity.

[0027] The adjustable positioning seat 32 is equipped with a first positioning block 321 and a second positioning block 322, which are respectively installed and removed by bolts. The second positioning block 322 is located on the side of the adjustable positioning seat 32 facing the through shaft hole 311. The adjustable positioning seat 32 is fixedly installed in the keyway 312 by bolts on the first positioning block 321. The end of the adjustable positioning seat 32 facing the through shaft hole 311 is rounded. The first positioning block 321 realizes the locking and positioning between the adjustable positioning seat 32 and the keyway 312. The second positioning block 322 is used to directly contact and clamp the outer contour of the servo. The rounded corner structure can reduce the impact and scratches of the sharp corners on the servo housing during clamping. The position adjustment of the adjustable positioning seat 32 and the angle limitation of the servo stick 33 can be completed by removing and installing bolts.

[0028] The second positioning block 322 is rotatably connected to the fisheye head 3221 via a bearing. One end of the fisheye head 3221 extends to the outside of the adjustable positioning seat 32. The second positioning block 322 is installed on the adjustable positioning seat 32 via bolts and is arranged coaxially with the first positioning block 321. The fisheye head 3221 achieves small-angle adaptive deflection with the help of the bearing, which can compensate for the small position deviation caused by the installation of the servo motor and reduce the test error. The bolt connection facilitates the quick replacement of the fisheye head 3221 after wear. At this time, the adjustable positioning seat 32 with rounded corners can perform this function.

[0029] The servo mounting module 3 has a stop groove 34 on the side away from the positioning plate 31. The stop mounting module 4 is installed on the stop groove 34 by bolts. The stop groove 34 provides an installation reference for the stop mounting module 4. The installation position of the stop mounting module 4 can be adjusted according to the servo test swing stroke. The stop groove 34 allows the stop mounting module 4 and the servo mounting module 3 to form a whole structure, which is convenient for disassembly, assembly and relocation.

[0030] A support column 51 is fixedly installed on the cylinder fixing module 5. A support hinge seat 61 is fixedly installed on one end of the test cylinder 6. A rudder hinge seat 62 is fixedly installed on the piston rod of the test cylinder 6. The test cylinder 6 is hinged to the support column 51 and the rudder column 33 through the support hinge seat 61 and the rudder hinge seat 62 respectively. The support hinge seat 61 and the rudder hinge seat 62 are also provided with threaded pins that pass through. The support column 51 provides installation support for the test cylinder 6. The two hinge structures can adapt to the angle changes when the piston rod of the test cylinder 6 extends and retracts. The threaded pin realizes reliable limit of the hinge position, prevents the hinge part from disengaging, and can realize quick disassembly and assembly of the test cylinder 6 through its threaded nut structure.

[0031] A protective stop 41 is fixedly installed on the stop fixing module 4. The protective stop 41 is V-shaped and the opening faces the rudder post 33. The protective stop 41 is also equipped with a rudder detection probe 411 for monitoring the deflection of the positioning disk 31. The V-shaped protective stop 41 plays a mechanical limiting and protection role to prevent the rudder post 33 from deflecting too far and causing damage to the components. The rudder detection probe 411 collects the deflection angle signal of the positioning disk 31 in real time, converts the physical deflection into an electrical signal and outputs it to the external test acquisition system. This is an existing mature rudder deflection detection technology solution.

[0032] The servo motor fixing module 3, the stop fixing module 4, and the hydraulic cylinder fixing module 5 are arranged sequentially along the length of the track 1. Each of the servo motor fixing module 3, the stop fixing module 4, and the hydraulic cylinder fixing module 5 is equipped with a lifting lug 7 for hoisting. The arrangement along the track 1 facilitates the force transmission and position adjustment between the modules. The lifting lug 7 facilitates the hoisting and transportation of each large mass module, and facilitates the assembly, transportation, maintenance, and replacement of the device.

[0033] The track 1 has an adjustment groove 11 along its length. The pressure plate seat 2 has a locking surface 21 that fits against the side of the track 1. The pressure plate seat 2 also has a locking groove 22 that fits the edge of the track 1. The pressure plate seat 2 has screw holes that fit the adjustment groove 11. The pressure plate seat 2 is fixedly installed on the corresponding adjustment groove 11 by bolts. The adjustment groove 11 provides multiple installation points for the pressure plate seat 2. The locking surface 21 and the locking groove 22 realize the guiding positioning between the pressure plate seat 2 and the track 1, preventing the pressure plate seat 2 from shifting laterally under force. The bolts pass through the screw holes and lock the position of the pressure plate seat 2, realizing stepless adjustment of the module position.

[0034] When using this device for modal testing of hydraulic servos, the track 1 is first fixedly installed on the test platform via the pressure plate seat 2. Based on the external dimensions of the servo stick 33 of the hydraulic servo under test and the test requirements, the installation position of the pressure plate seat 2 is adjusted along the adjustment groove 11 of the track 1. After guiding and positioning through the engagement surface 21 and engagement groove 22 of the pressure plate seat 2, the bolts are tightened. The positioning and installation of the servo fixing module 3, the stop fixing module 4, and the cylinder fixing module 5 are completed in sequence. The shaft of the hydraulic servo under test is passed through the shaft hole 311 of the positioning plate 31. The adjustment positioning seat 32 is slid along the keyway 312 of the positioning plate 31 to move the adjustment positioning seat 32 to the clamping size that matches the servo under test. The bolts of the first positioning block 321 are tightened to lock the adjustment positioning seat 32. The fisheye head 3221 on the second positioning block 322 contacts the outer wall of the servo. The bearings achieve micro-angle adaptive compensation to eliminate the position deviation caused by clamping. One end of the test cylinder 6 is hinged to the support column 51 of the cylinder fixing module 5 via the support hinge seat 61. The piston rod end of the test cylinder 6 is hinged to the rudder column 33 via the rudder hinge seat 62. A threaded pin is inserted to complete the anti-disengagement limit of the hinge part. According to the preset swing stroke of the servo motor, the assembly position of the stop fixing module 4 is adjusted and locked on the stop groove 34 of the servo motor fixing module 3 so that the V-shaped protective stop 41 on the stop fixing module 4 is aligned with the rudder column 33. The external acquisition system is connected so that the rudder detection probe 411 on the protective stop 41 is in the signal acquisition ready state. The test cylinder 6 is activated, and the piston rod of the test cylinder 6 extends and retracts, driving the rudder column 33 to rotate under the constraint of the positioning plate 31 through the hinge structure, thereby realizing the deflection movement of the servo motor under test. During the test, the rudder detection probe 411 continuously collects the deflection angle signal of the positioning plate 31 and transmits it to the external test acquisition system. The V-shaped protective stop 41 performs overtravel mechanical limit on the rudder column 33. After the modal test is completed, the threaded pins and locking bolts of each part are released in sequence, the adjustable positioning seat 32 is loosened, and the hydraulic servo motor under test is removed. Each module can be hoisted and transported through the lifting lug 7. When changing to a different specification of servo motor under test, it is only necessary to repeatedly slide the adjustable positioning seat 32 and adjust the installation position of each module to carry out the next set of modal tests.

[0035] A method for using a quick clamping device for modal testing of hydraulic servos includes the following steps: Step 1: When the device is needed, first fix the track 1 on the test platform with the help of the pressure plate seat 2. According to the size of the hydraulic servo motor to be tested and the test requirements, adjust the position of the pressure plate seat 2 on the adjustment groove 11. After guiding and positioning, tighten the bolts to complete the installation of the servo motor fixing module 3, the stop fixing module 4, and the cylinder fixing module 5. Step 2: Pass the shaft of the hydraulic servo motor under test through the through hole 311 of the positioning plate 31, slide the adjustable positioning seat 32 along the keyway 312 to the appropriate clamping size, and tighten the bolt of the first positioning block 321 so that the fisheye head 3221 contacts the outer wall of the servo motor to achieve position compensation. Step 3: Hinge the test cylinder 6 to the support column 51 and the rudder post 33 respectively, insert the threaded pin limiter, adjust the position of the stop fixing module 4 and lock it, and connect the external acquisition system to make the rudder detection probe 411 enter the ready state. Step 4: Start the test cylinder 6 to drive the rudder stick 33 to deflect the rudder motor under test. The rudder stick detection probe 411 collects the deflection signal. The V-shaped protective stop 41 performs overtravel limit to complete the modal test. Step 5: After the test is completed, remove the threaded pins and all locking bolts, loosen the adjustable positioning seat 32 to remove the servo, adjust the position of the components, and then proceed with the test of the next servo to be tested.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A quick clamping device for modal testing of hydraulic servo motors, characterized in that: Includes a track (1), on which a pressure plate seat (2) is installed by bolts. On the track (1), a servo motor fixing module (3), a stop fixing module (4) and a hydraulic cylinder fixing module (5) are also installed by the pressure plate seat (2). The stop fixing module (4) is located between the servo motor fixing module (3) and the hydraulic cylinder fixing module (5). The hydraulic cylinder fixing module (5) is also provided with a test hydraulic cylinder (6) that is connected to the servo motor fixing module (3) in a transmission. The servo mounting module (3) is fixedly mounted with a positioning plate (31). The positioning plate (31) is also provided with a through hole for the rudder post (33) to pass through. The positioning plate (31) is provided with a through shaft hole (311) arranged concentrically with the rudder post (33). The positioning plate (31) is provided with a keyway (312) arranged in a ring array around the rudder post (33). The positioning plate (31) is also provided with a pitch adjustment positioning seat (32) that is detached and installed by bolts. The pitch adjustment positioning seat (32) is arranged in a ring array along the rudder post (33) through the keyway (312).

2. The quick-clamping device for modal testing of hydraulic steering gear according to claim 1, characterized in that, The through-shaft hole (311) is arranged in a cross shape on the positioning plate (31), and the adjustable positioning seat (32) is slidably arranged along the corresponding keyway (312), and the spacing of the relatively arranged adjustable positioning seats (32) corresponds to the diameter of the rudder post (33).

3. The quick-clamping device for modal testing of hydraulic steering gear according to claim 2, characterized in that, The adjustable positioning seat (32) is respectively installed with a first positioning block (321) and a second positioning block (322) by bolts. The second positioning block (322) is located on the side of the adjustable positioning seat (32) facing the through shaft hole (311). The adjustable positioning seat (32) is fixedly installed in the keyway (312) by bolts on the first positioning block (321). The end of the adjustable positioning seat (32) facing the through shaft hole (311) is rounded.

4. The quick-clamping device for modal testing of hydraulic steering gear according to claim 3, characterized in that, The second positioning block (322) is rotatably connected to a fisheye head (3221) via a bearing. One end of the fisheye head (3221) extends to the outside of the adjustable positioning seat (32). The second positioning block (322) is disassembled and installed on the adjustable positioning seat (32) by bolts and is arranged coaxially with the first positioning block (321).

5. The quick-clamping device for modal testing of hydraulic steering gear according to claim 1, characterized in that, The servo fixing module (3) has a stop groove (34) on the side away from the positioning plate (31), and the stop fixing module (4) is installed on the stop groove (34) by bolts.

6. The quick-clamping device for modal testing of hydraulic steering gear according to claim 1, characterized in that, A support column (51) is fixedly installed on the cylinder fixing module (5). A support hinge seat (61) is fixedly installed at one end of the test cylinder (6). A rudder hinge seat (62) is fixedly installed on the piston rod of the test cylinder (6). The test cylinder (6) is hinged to the support column (51) and the rudder column (33) through the support hinge seat (61) and the rudder hinge seat (62) respectively. The support hinge seat (61) and the rudder hinge seat (62) are also provided with threaded pins that pass through.

7. The quick-clamping device for modal testing of hydraulic steering gear according to claim 5, characterized in that, A protective stop (41) is fixedly installed on the stop fixing module (4). The protective stop (41) is V-shaped and the opening is arranged facing the rudder post (33). The protective stop (41) is also provided with a rudder detection probe (411) for monitoring the deflection of the positioning disk (31).

8. The quick-clamping device for modal testing of hydraulic steering gear according to claim 1, characterized in that, The servo motor fixing module (3), the stop fixing module (4) and the cylinder fixing module (5) are arranged sequentially along the length of the track (1). Each of the servo motor fixing module (3), the stop fixing module (4) and the cylinder fixing module (5) is provided with a lifting lug (7) for hoisting.

9. The quick-clamping device for modal testing of hydraulic steering gear according to claim 8, characterized in that, The track (1) has an adjustment groove (11) along its length. The pressure plate seat (2) has a locking surface (21) that fits against the side of the track (1). The pressure plate seat (2) also has a locking groove (22) that fits the edge of the track (1) below it. The pressure plate seat (2) has screw holes that fit the adjustment groove (11). The pressure plate seat (2) is fixedly installed on the corresponding adjustment groove (11) by bolts.

10. A method of using a quick-clamping device for modal testing of a hydraulic servo motor, wherein the device is applied to the quick-clamping device for modal testing of a hydraulic servo motor as described in claim 1, characterized in that: Includes the following steps: Step 1: When the device is needed, first fix the track (1) on the test platform with the help of the pressure plate seat (2). According to the size of the hydraulic servo motor to be tested and the test requirements, adjust the position of the pressure plate seat (2) on the adjustment groove (11), and after guiding and positioning, tighten the bolts to complete the installation of the servo motor fixing module (3), the stop fixing module (4), and the cylinder fixing module (5). Step 2: Pass the shaft of the hydraulic servo motor under test through the through hole (311) of the positioning plate (31), slide the adjustable positioning seat (32) along the keyway (312) to the appropriate clamping size, and tighten the bolt of the first positioning block (321) so that the fisheye head (3221) contacts the outer wall of the servo motor to achieve position compensation. Step 3: Hinge the test cylinder (6) to the support column (51) and the rudder column (33) respectively, insert the threaded pin limiter, adjust the position of the stop fixing module (4) and lock it, and connect the external acquisition system to make the rudder detection probe (411) enter the ready state. Step 4: Start the test cylinder (6) to drive the rudder column (33) to deflect the rudder motor under test. The rudder detection probe (411) collects the deflection signal. The V-shaped protective stop (41) performs overtravel limit to complete the modal test. Step 5: After the test is completed, remove the threaded pin and each locking bolt, loosen the adjustable positioning seat (32), remove the servo, adjust the position of the component, and then carry out the test of the next servo to be tested.

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