A rudder hydraulic sleeve test platform

Abstract

The present invention relates to the technical field of ship equipment testing, and specifically provides a rudder hydraulic sleeve test platform, the test platform comprising: a bottom mounting plate; a rotating oil cylinder fixedly connected to the bottom mounting plate and a stretching oil cylinder fixedly connected to the rotating oil cylinder, the stretching oil cylinder being connected to the output shaft of the rotating oil cylinder; a dummy shaft fixing part fixedly connected to the output shaft of the stretching oil cylinder, the dummy shaft fixing part being provided with at least three groups of fixing claws uniformly distributed circumferentially around the axis of the output shaft of the stretching oil cylinder, the dummy shaft fixing part being further provided with a claw driving part for driving the three groups of fixing claws to move synchronously in the radial direction; a sleeve fixing part detachably connected to the fixing claw; the present invention fixes the sleeve fixing part in a manner of outward expansion of at least three groups of fixing claws, thereby greatly improving the replacement efficiency of the sleeve fixing part.

Description

Technical Field

[0001] The present invention relates to the technical field of ship equipment testing, in particular to a rudder hydraulic shaft sleeve testing platform. Background Art

[0002] At present, when the rudder hydraulic bushing is subjected to type tests such as functional tests and impact tests, the common method is to place the rudder hydraulic bushing on a tooling dummy shaft, apply axial force through an axial force loading hydraulic tool, or use a dummy shaft to mount a counterweight for testing. For rudder hydraulic bushings of different diameters, different tooling dummy shafts need to be prepared. When testing rudder hydraulic bushings of different sizes, dummy shafts of different sizes need to be replaced. The dummy shaft is generally fixed to the test equipment by bolts. When replacing the dummy shaft, it is necessary to spend time removing the bolts and tightening the bolts, which affects the replacement efficiency. Therefore, the present application proposes a rudder hydraulic bushing test platform. Summary of the Invention

[0003] The object of the present invention is to provide a rudder hydraulic sleeve test platform to solve the problem of low efficiency in replacing dummy shafts when testing hydraulic sleeves of different diameters in current hydraulic sleeve test machines.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A rudder hydraulic sleeve test platform, comprising:

[0006] Bottom mounting plate;

[0007] A rotating oil cylinder fixedly connected to the bottom mounting plate and a stretching oil cylinder fixedly connected to the rotating oil cylinder, wherein the stretching oil cylinder is connected to the output shaft of the rotating oil cylinder;

[0008] A dummy shaft fixing part fixedly connected to the output shaft of the stretching oil cylinder, the stretching oil cylinder drives the dummy shaft fixing part to move axially along the output shaft of the stretching oil cylinder, and the rotating oil cylinder drives the dummy shaft fixing part to rotate circumferentially along the output shaft of the stretching oil cylinder through the stretching oil cylinder, the dummy shaft fixing part is provided with at least three groups of fixed claws evenly distributed circumferentially around the axis of the output shaft of the stretching oil cylinder, and the dummy shaft fixing part is further provided with a claw driving part that drives the three groups of fixed claws to move synchronously in the radial direction;

[0009] A shaft sleeve fixing part is detachably connected to the fixing claw, a clamping hole concentric with the shaft sleeve fixing part is provided at the axis center of the shaft sleeve fixing part, a plurality of limiting slots are provided on the inner wall of the clamping hole, a limiting protrusion is provided on the outer side of the fixing claw, and the limiting protrusion is located in the limiting slot, the shaft sleeve fixing part is used to install the rudder hydraulic shaft sleeve, and there are several shaft sleeve fixing parts, the outer diameters of several of the shaft sleeve fixing parts are different to adapt to rudder hydraulic shaft sleeves of different sizes, and the inner diameters of several of the shaft sleeve fixing parts are the same.

[0010] Furthermore, the claw driving unit includes

[0011] A sliding block is provided with a plurality of parallel inclined grooves, and an inclined sliding block is provided at the position where the fixed claw is connected to the inclined groove, and the inclined sliding block is slidably connected in the inclined groove;

[0012] A guide rod, the guide rod being fixedly connected to the inner side of the dummy shaft fixing portion, the sliding blocks and the guide rod being provided in three groups, the three groups of sliding blocks and guide rods being evenly distributed around the axis of the output shaft of the rotary cylinder in the circumferential direction;

[0013] gear;

[0014] A drive motor is fixedly connected to the inner side of the dummy shaft fixing portion, the gear is fixedly connected to the output shaft of the drive motor, the drive motor is located at the center of the three groups of sliding blocks and the guide rod, and a rack is provided on one side of the sliding block close to the gear, and the rack is engaged with the gear.

[0015] Furthermore, the dummy shaft fixing portion further includes:

[0016] The mounting shell is in the shape of a hollow cylinder. A limiting guide rail for limiting the fixing claw is provided on the mounting shell.

[0017] Furthermore, the mounting shell includes a back plate and an outer cover, the back plate is a disc-shaped structure, the back plate is fixedly connected to the output shaft of the stretching cylinder, the outer cover is a cylindrical structure, the back plate and the outer cover are fixedly connected, and three groups of sliding grooves are provided on the back plate and are evenly distributed along the axis of the mounting shell in the circumferential direction. The sliding grooves are arranged radially, and a limiting guide rail is provided in the sliding groove. Limiting slide grooves are provided on both sides of the fixed claw, and the limiting guide rails are slidably connected in the limiting slide grooves.

[0018] Furthermore, a position detection component is provided in the mounting housing for measuring the radial displacement of the fixing claw.

[0019] Furthermore, the position detection component is a capacitive grid sensor, the moving grid of the position detection component is fixed to the side of the fixed claw, and the fixed grid of the position detection component is fixed to the inner side of the dummy shaft fixing portion.

[0020] Furthermore, the inner side of the fixing claw is arc-shaped.

[0021] Furthermore, the rotating cylinder is a hollow cylinder, the stretching cylinder is a double-head hydraulic cylinder, one end of the output shaft of the stretching cylinder is slidingly connected to the output end of the rotating cylinder, and the end of the output shaft of the stretching cylinder away from the rotating cylinder is fixedly connected to the dummy shaft fixing part.

[0022] Furthermore, a spline groove is provided on the inner wall of the output end of the stretching oil cylinder, a spline is provided on the portion where the output shaft of the stretching oil cylinder is connected to the rotating oil cylinder, and the spline groove and the spline are slidably connected.

[0023] Furthermore, the output shaft of the stretching cylinder is connected to the mounting housing through the connecting flange. The connecting flange includes a flange plate and a power box. The power box is cylindrical with an opening at one end. The flange plate is located at the mouth of the power box.

[0024] In summary, the present invention has the following beneficial effects compared with the prior art:

[0025] The rudder hydraulic test platform disclosed in an embodiment of the present invention fixes the shaft sleeve fixing part by expanding at least three groups of fixing claws outward. When replacing shaft sleeve fixing parts of different sizes, it is only necessary to drive the fixing claws inward through the claw driving part to remove the shaft sleeve fixing part, thereby greatly improving the replacement efficiency of the shaft sleeve fixing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram from the first perspective of the rudder hydraulic sleeve test platform disclosed in an embodiment of the present invention.

[0027] Figure 2 This is a structural schematic diagram of the rudder hydraulic sleeve test platform disclosed in an embodiment of the present invention from a second perspective.

[0028] Figure 3 This is a front view of the rudder hydraulic sleeve test platform disclosed in an embodiment of the present invention.

[0029] Figure 4 for Figure 3 Cross-sectional view of AA in the figure.

[0030] Figure 5 The figure is a schematic structural diagram of a rotary oil cylinder in a rudder hydraulic sleeve test platform disclosed in an embodiment of the present invention.

[0031] Figure 6The figure is a schematic structural diagram of a stretching cylinder in a rudder hydraulic sleeve test platform disclosed in an embodiment of the present invention.

[0032] Figure 7 The figure is a schematic structural diagram of the dummy shaft fixing portion in the rudder hydraulic shaft sleeve test platform disclosed in an embodiment of the present invention.

[0033] Figure 8 The figure is a schematic diagram of the internal structure of the dummy shaft fixing part in the rudder hydraulic shaft sleeve test platform disclosed in an embodiment of the present invention.

[0034] Figure 9 The figure is a schematic structural diagram of a connecting flange in a rudder hydraulic sleeve test platform disclosed in an embodiment of the present invention.

[0035] Reference numerals:

[0036] 100. Bottom mounting plate; 110. First oblique support; 120. Second oblique support; 200. Rotating cylinder; 210. Spline groove; 300. Tensile cylinder; 310. Spline; 400. Bushing fixing portion; 410. Axial limiting groove; 420. Limiting bar; 500. Dummy shaft fixing portion; 510. Fixing claw; 511. Limiting protrusion; 512. Oblique sliding block; 520. Claw driving portion; 521. Sliding block; 522. Oblique groove; 523. Guide rod; 524. Rack; 525. Gear; 526. Driving motor; 530. Mounting housing; 531. Back plate; 532. Outer cover; 533. Sliding groove; 534. Limiting guide rail; 600. Connecting flange; 610. Flange plate; 620. Power box; 630. Reinforcing rib; 700. Position detection assembly. DETAILED DESCRIPTION

[0037] The technical solutions 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 only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] like Figures 1 to 4 As shown, one embodiment of the present invention provides a rudder hydraulic sleeve test platform, the test platform comprising:

[0039] Bottom mounting plate 100;

[0040] A rotating cylinder 200 fixedly connected to the bottom mounting plate 100 and a stretching cylinder 300 fixedly connected to the rotating cylinder 200 , wherein the stretching cylinder 300 is connected to the output shaft of the rotating cylinder 200 ;

[0041] A dummy shaft fixing portion 500 is fixedly connected to the output shaft of the stretching cylinder 300. The stretching cylinder 300 drives the dummy shaft fixing portion 500 to move axially along the output shaft of the stretching cylinder 300. The rotating cylinder 200 drives the dummy shaft fixing portion 500 to rotate circumferentially along the output shaft of the stretching cylinder 300 through the stretching cylinder 300. The dummy shaft fixing portion 500 is provided with at least three groups of fixed claws 510 evenly distributed circumferentially around the axis of the output shaft of the stretching cylinder 300. The dummy shaft fixing portion 500 is further provided with a claw driving portion 520 that drives the three groups of fixed claws 510 to move synchronously in the radial direction.

[0042] The sleeve fixing part 400 is detachably connected to the fixing claw 510, and a clamping hole concentric with the sleeve fixing part 400 is provided at the axis center of the sleeve fixing part 400, and a plurality of limiting grooves are provided on the inner wall of the clamping hole. A limiting protrusion 511 is provided on the outer side of the fixing claw 510, and the limiting protrusion 511 is located in the limiting groove. The sleeve fixing part 400 is used to install the rudder hydraulic sleeve. There are several sleeve fixing parts 400, and the outer diameters of several sleeve fixing parts 400 are different to adapt to rudder hydraulic sleeves of different sizes, and the inner diameters of several sleeve fixing parts 400 are the same.

[0043] In this embodiment, the sleeve fixing part 400 is provided with several, and the outer diameters of the sleeve fixing parts 400 are different to adapt to rudder hydraulic sleeves of different sizes. When the sleeve fixing part 400 is replaced, the fixing claw 510 is driven to move inward by the claw driving part 520, and the sleeve fixing part 400 can be directly removed. After selecting the sleeve fixing part 400 of the corresponding size, the sleeve fixing part 400 is placed on the fixing claw 510, and the fixing claw 510 is driven to move outward by the claw driving part 520, so that the fixing claw 510 supports the sleeve fixing part 400 by expanding outward. At this time, the limiting protrusion 511 is inserted into the limiting slot. When performing a type test, the stretching cylinder 300 provides an axial force by stretching the dummy shaft fixing part 500, and the rotating cylinder 200 provides a rotational force by driving the dummy shaft fixing part 500 to rotate, thereby performing a type test.

[0044] The rudder hydraulic test platform disclosed in the embodiment of the present invention fixes the sleeve fixing part 400 by expanding at least three groups of the fixing claws 510 outward. When replacing the sleeve fixing part of different sizes, it is only necessary to drive the fixing claws 510 inward through the claw driving part 520 to remove the sleeve fixing part 400, thereby greatly improving the replacement efficiency of the sleeve fixing part 400.

[0045] Specifically, in this embodiment, the bottom mounting plate 100 is a flat plate structure, and a first oblique support 110 and a second oblique support 120 are provided on the bottom mounting plate 100. The first oblique support 110 and the second oblique support 120 are both plate-shaped structures. The rotating cylinder 200 and the stretching cylinder 300 are respectively fixedly connected to the first oblique support 110 and the second oblique support 120 by bolts, and the first oblique support 110 and the second oblique support 120 are fixedly connected to the bottom mounting plate 100 by welding.

[0046] As a preferred implementation in this embodiment, Figure 5 and Figure 6 As shown, the rotating cylinder 200 is a hollow cylinder, that is, the output end of the rotating cylinder 200 is cylindrical, and the stretching cylinder 300 is a double-headed hydraulic cylinder; one end of the output shaft of the stretching cylinder 300 is slidably connected to the output end of the rotating cylinder 200, so that the rotating cylinder 200 can drive the output shaft of the stretching cylinder 300 to rotate, and the end of the output shaft of the stretching cylinder 300 away from the rotating cylinder 200 is fixedly connected to the dummy shaft fixing portion 500;

[0047] Specifically, a spline groove 210 is provided on the inner wall of the output end of the stretching oil cylinder 300, and a spline 310 is provided at the portion where the output shaft of the stretching oil cylinder 300 is connected to the rotating oil cylinder 200. The spline groove 210 and the spline 310 cooperate with each other, so that the stretching oil cylinder 300 drives the output shaft of the stretching oil cylinder 300 to rotate through the spline groove 210 and the spline 310, while not affecting the displacement of the output shaft of the stretching oil cylinder 300.

[0048] In some other examples, one end of the output shaft of the stretching cylinder 300 is fixedly connected to a spline shaft by a bolt, the spline 310 is located on the spline shaft, and the spline shaft is slidably connected to the inner side of the output end of the rotating cylinder 200;

[0049] The rotating cylinder 200 and the stretching cylinder 300 are both prior art. For example, the rotating cylinder 200 is a UBFKS125-70° swing cylinder.

[0050] It should be noted that the stretching cylinder 300 can also be a conventional single-head hydraulic cylinder. In this case, the stretching cylinder 300 can be installed as a whole to the output end of the rotating cylinder 200. However, in this case, the rotating cylinder 200 drives the stretching cylinder 300 to rotate as a whole, which can easily cause the hydraulic pipeline to be entangled. Therefore, the stretching cylinder 300 is preferably a double-head hydraulic cylinder, and only the output shaft of the stretching cylinder 300 is connected to the rotating cylinder 200.

[0051] like Figure 7 and Figure 8 As shown, in this embodiment, the fixing claws 510 are provided in three groups, and the dummy shaft fixing portion 500 further includes:

[0052] The mounting shell 530 is a hollow cylindrical shell with a limiting guide rail 534 for limiting the position of the fixing claw 510;

[0053] A claw driving portion 520 fixedly connected to the interior of the fixed claw 510 is used to drive the fixed claw 510 to slide along the radial direction of the fixed claw 510;

[0054] Specifically, the claw driving portion 520 is fixedly connected to the inside of the mounting housing 530. When the sleeve fixing portion 400 is disassembled, the claw driving portion 520 drives the fixing claw 510 to move along the radial axis, so that the sleeve fixing portion 400 can be easily disassembled.

[0055] The mounting housing 530 includes a back plate 531 and an outer cover 532. The back plate 531 is a disc-shaped structure and is fixedly connected to the output shaft of the stretching cylinder 300. The outer cover 532 is a cylindrical structure and is fixedly connected to the back plate 531 and the outer cover 532 by bolts. The back plate 531 is provided with three groups of sliding grooves 533 uniformly distributed along the axis of the mounting housing 530 in the circumferential direction. The sliding grooves 533 are arranged in the radial direction. Limiting guide rails 534 are provided in the sliding grooves 533. Limiting sliding grooves are provided on both sides of the fixing claw 510. The limiting guide rails 534 are slidably connected in the limiting sliding grooves.

[0056] As a preferred embodiment of this embodiment, the claw driving unit 520 includes a sliding block 521, a guide rod 523, a gear 525 and a driving motor 526. The sliding block 521 is provided with a plurality of parallel inclined grooves 522. The position where the fixed claw 510 is connected to the inclined groove 522 is provided with an inclined slider 512. The inclined slider 512 is slidably connected in the inclined groove 522. The guide rod 523 is fixedly connected to the back plate 531 through the shaft seat structure. The sliding block 521 and the guide rod 523 are fixedly connected to the back plate 531 through the shaft seat structure. 3 are provided with three groups, and the three groups of sliding blocks 521 and guide rods 523 are evenly distributed around the axis of the mounting housing 530 in the circumferential direction. The driving motor 526 is fixedly connected to the back plate 531, and the gear 525 is fixedly connected to the output shaft of the driving motor 526. The driving motor 526 is located at the center of the three groups of sliding blocks 521 and guide rods 523. A rack 524 is provided on the side of the sliding block 521 close to the gear 525, and the rack 524 is engaged with the gear 525.

[0057] Specifically, the drive motor 526 and the gear 525 are located on both sides of the back plate 531. The drive motor 526 is a reduction motor. The sliding block 521 and the guide rod 523 are located on the same side as the gear 525. When the drive motor 526 rotates, the drive motor 526 drives the gear 525 to rotate. The gear 525 drives the sliding block 521 to slide on the guide rod 523 through the rack 524. When the sliding block 521 slides, it drives the limiting protrusion 511 to move radially through the inclined groove 522 and the inclined slider 512.

[0058] In this embodiment, the claw driving part 520 can also be other structures, such as the claw driving part 520 is disc-shaped, the claw driving part 520 is provided with a flat thread, the position where the fixed claw 510 contacts the claw driving part 520 is provided with a spiral groove, the claw driving part 520 is driven to rotate by a motor, and the fixed claw 510, the claw driving part 520 and the mounting shell 530 constitute the structure of an electric three-jaw chuck.

[0059] Preferably, Figure 1 As shown, the shaft sleeve fixing portion 400 is cylindrical with openings at both ends. The limiting groove in the shaft sleeve fixing portion 400 is composed of an axial limiting groove 410 and a limiting strip 420. The axial limiting groove 410 is an annular groove arranged on the inner wall. There are multiple axial limiting grooves 410. The limiting strip 420 is a strip block embedded in the inner wall. The limiting strip 420 is arranged axially. The limiting strip 420 passes through multiple axial limiting grooves 410. Two axial limiting grooves 410 and the limiting strip 420 form a limiting groove. The limiting protrusion 511 is located between the two limiting strips 420.

[0060] The output shaft of the stretching oil cylinder 300 is connected to the mounting housing 530 via the connecting flange 600. Figure 9 As shown, the connecting flange 600 includes a flange plate 610 and a power box 620. The power box 620 is cylindrical with an opening at one end. The flange plate 610 is located at the mouth of the power box 620. The reinforcing rib 630 is located on the outside of the power box 620. The reinforcing rib 630 connects the flange plate 610 and the power box 620. The power box 620 is fixedly connected to the output shaft of the stretching cylinder 300 by bolts, and the flange plate 610 is fixedly connected to the mounting shell 530 by bolts.

[0061] As a preferred implementation in this embodiment, a position detection component 700 is further provided in the mounting housing 530 for measuring the radial displacement of the fixing claw 510;

[0062] Preferably, the position detection component 700 is a capacitive grid sensor, the moving grid of the position detection component 700 is fixed to the side of the fixed claw 510, and the fixed grid of the position detection component 700 is fixed to the outer cover 532. When the fixed claw 510 slides, the position detection component 700 can measure the displacement of the fixed claw 510. The inner side of the fixed claw 510 is arc-shaped. The fixed claw 510 can not only prevent the drive motor 526 from being overloaded (when the fixed claw 510 reaches a predetermined position, the drive motor 526 stops), but also measure the outer diameter and inner diameter of the rudder hydraulic sleeve. The method is to first record the position of the fixed claw 510 through a standard block. During measurement, by recording the displacement of the fixed claw 510, the size difference between the rudder hydraulic sleeve and the standard block (that is, the radial displacement of the fixed claw 510) can be measured, thereby obtaining the size of the rudder hydraulic sleeve.

[0063] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The singular forms "a," "the," and "the" used in this invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0064] It should be understood that although the terms "first," "second," "third," etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. Depending on the context, the term "if" as used herein may be interpreted as "when," "when," or "in response to determining."

[0065] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rudder hydraulic sleeve test platform, characterized in that: The test platform includes: bottom mounting plate (100); a rotating oil cylinder (200) fixedly connected to the bottom mounting plate (100) and a stretching oil cylinder (300) fixedly connected to the rotating oil cylinder (200), wherein the stretching oil cylinder (300) is connected to an output shaft of the rotating oil cylinder (200); A dummy shaft fixing part (500) is fixedly connected to the output shaft of the stretching oil cylinder (300), the stretching oil cylinder (300) drives the dummy shaft fixing part (500) to move axially along the output shaft of the stretching oil cylinder (300), and the rotating oil cylinder (200) drives the dummy shaft fixing part (500) to rotate circumferentially along the output shaft of the stretching oil cylinder (300) through the stretching oil cylinder (300). The dummy shaft fixing part (500) is provided with at least three groups of fixed claws (510) uniformly distributed around the axis of the output shaft of the stretching oil cylinder (300) in the circumferential direction, and a claw driving part (520) is further provided in the dummy shaft fixing part (500) for driving the three groups of fixed claws (510) to move synchronously in the radial direction; A shaft sleeve fixing part (400) is detachably connected to the fixing claw (510); a clamping hole concentric with the shaft sleeve fixing part (400) is provided at the axis center of the shaft sleeve fixing part (400); a plurality of limiting slots are provided on the inner wall of the clamping hole; a limiting protrusion (511) is provided on the outer side of the fixing claw (510); the limiting protrusion (511) is located in the limiting slot; the shaft sleeve fixing part (400) is used to install a rudder hydraulic shaft sleeve; a plurality of the shaft sleeve fixing parts (400) are provided; the outer diameters of the plurality of the shaft sleeve fixing parts (400) are different so as to adapt to rudder hydraulic shaft sleeves of different sizes; and the inner diameters of the plurality of the shaft sleeve fixing parts (400) are the same.

2. The rudder hydraulic sleeve test platform according to claim 1, characterized in that: The claw driving unit (520) includes: A sliding block (521), wherein the sliding block (521) is provided with a plurality of parallel distributed inclined grooves (522), an inclined sliding block (512) is provided at the position where the fixed claw (510) is connected to the inclined groove (522), and the inclined sliding block (512) is slidably connected in the inclined groove (522); A guide rod (523), the guide rod (523) is fixedly connected to the inner side of the dummy shaft fixing portion (500), the sliding blocks (521) and the guide rod (523) are each provided in three groups, and the three groups of the sliding blocks (521) and the guide rod (523) are evenly distributed around the axis of the output shaft of the rotary oil cylinder (200) in the circumferential direction; Gear(525); A drive motor (526) is fixedly connected to the inner side of the dummy shaft fixing portion (500), and the gear (525) is fixedly connected to the output shaft of the drive motor (526). The drive motor (526) is located at the center of the three groups of sliding blocks (521) and the guide rod (523). A rack (524) is provided on one side of the sliding block (521) close to the gear (525), and the rack (524) is engaged with the gear (525).

3. The rudder hydraulic sleeve test platform according to claim 2, characterized in that: The dummy shaft fixing portion (500) further comprises: The mounting shell (530) is in the shape of a hollow cylinder. The mounting shell (530) is provided with a limiting guide rail (534) for limiting the position of the fixing claw (510).

4. The rudder hydraulic sleeve test platform according to claim 3, characterized in that: The mounting shell (530) includes a back plate (531) and an outer cover (532). The back plate (531) is a disc-shaped structure and is fixedly connected to the output shaft of the stretching oil cylinder (300). The outer cover (532) is a cylindrical structure. The back plate (531) and the outer cover (532) are fixedly connected. The back plate (531) is provided with three groups of sliding grooves (533) uniformly distributed along the axis of the mounting shell (530) in the circumferential direction. The sliding grooves (533) are arranged in the radial direction. A limiting guide rail (534) is provided in the sliding groove (533). Limiting sliding grooves are provided on both sides of the fixed claw (510). The limiting guide rail (534) is slidably connected in the limiting sliding groove.

5. The rudder hydraulic sleeve test platform according to claim 3, characterized in that: A position detection component is also provided in the mounting housing (530) for measuring the radial displacement of the fixing claw (510).

6. The rudder hydraulic sleeve test platform according to claim 5, characterized in that: The position detection component is a capacitive grid sensor, the movable grid of the position detection component is fixed to the side of the fixed claw (510), and the fixed grid of the position detection component is fixed to the inner side of the dummy shaft fixing portion (500).

7. The rudder hydraulic sleeve test platform according to claim 6, characterized in that: The inner side of the fixing claw (510) is arc-shaped.

8. The rudder hydraulic sleeve test platform according to any one of claims 1 to 7, characterized in that: The rotating oil cylinder (200) is a hollow oil cylinder, and the stretching oil cylinder (300) is a double-head hydraulic cylinder. One end of the output shaft of the stretching oil cylinder (300) is slidably connected to the output end of the rotating oil cylinder (200), and the end of the output shaft of the stretching oil cylinder (300) away from the rotating oil cylinder (200) is fixedly connected to the dummy shaft fixing portion (500).

9. The rudder hydraulic sleeve test platform according to claim 8, characterized in that: A spline groove (210) is provided on the inner wall of the output end of the stretching oil cylinder (300), a spline (310) is provided at the portion where the output shaft of the stretching oil cylinder (300) is connected to the rotating oil cylinder (200), and the spline groove (210) and the spline (310) are slidably connected.

10. The rudder hydraulic bushing test platform according to claim 3, wherein the output shaft of the stretching cylinder (300) is connected to the mounting housing (530) via a connecting flange (600), wherein the connecting flange (600) comprises a flange plate (610) and a power box (620), wherein the power box (620) is cylindrical with an opening at one end, and the flange plate (610) is located at the mouth of the power box (620).

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