Steering engine load test device

Abstract

The invention provides a steering engine load test device, which relates to the technical field of ship steering engines and comprises a mounting device, a self-adaptive load mechanism, a transmission head, a fixing screw I, a clamping groove seat and a clamping groove, the device has the advantages of being reasonable and simple in structure, low in production cost and convenient to install, complex connecting structures do not need to be customized for steering engines of different models, butt joint with the steering engines can be rapidly completed through simple assembly design, the universality and test preparation efficiency of the device are greatly improved, and the equipment investment and maintenance cost are reduced; according to the invention, the self-adaptive adjustment function of the load is realized, the hydraulic oil input flow can be dynamically changed according to the rotation state of the steering engine, so that the load force is accurately matched with the operation process of the steering engine, the problem of sudden load change easily occurring in a traditional rigid load structure is avoided, and the authenticity and reliability of test data are effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship steering engine, and particularly relates to a steering engine load test device. BACKGROUND

[0002] As the core executive component of ship heading control, the stability performance of ship steering engine under complex loads such as wind and wave, water flow impact, directly determines the navigation safety and control precision, so it must be verified for reliability by load test simulating the working condition of real ship before leaving factory. The existing ship steering engine load test device is mainly divided into two types of schemes, hydraulic counter loading and simulated rudder water power loading, the former directly converts the load force into the load of the steering engine hydraulic cylinder, which cannot restore the nonlinear water power characteristics of the rudder blade in the real ship, and the deviation from the actual navigation working condition is significant; the latter is close to the actual situation, but has many defects, such as the theoretical loading point of ship balance rudder and the space interference of rudder rod transmission mechanism, which is forced to move the loading point to the rear of the rudder blade tail edge, which also leads to the simulation accuracy of load normal force and turning moment cannot be considered, and it is difficult to match the load demand of different tonnage ships. At the same time, the traditional device adopts rigid load structure, which cannot adaptively adjust the load size according to the angle change of the ship steering engine during steering, and the load mutation easily occurs in the test, especially in the simulation of emergency steering and other extreme conditions, the distortion problem of test data is prominent. In addition, the existing device is complicated to install, and needs to customize the connection tooling for different ship steering engine models of container ships, bulk carriers and other ships, which has poor universality, and the core component has poor cooperation stability, the hydraulic circuit design is complex and easy to leak oil, which leads to low test efficiency and high equipment maintenance cost. These problems make it difficult for the existing device to meet the high-precision and high-adaptability test requirements of modern ship steering engines, so it is urgent to provide a test device with simple structure, convenient installation and adaptive load adjustment, to accurately simulate the load characteristics of real ship, improve the test accuracy and universality, and reduce the test cost. SUMMARY

[0003] The purpose of the present application is to provide a steering engine load test device to solve the above problems, which solves the problems of low simulation accuracy, non-adaptive load adjustment, poor universality and high test cost of the existing ship steering engine load test device.

[0004] In order to solve the above problems, the application provides a technical scheme: a rudder load test device, comprising a mounting device, an adaptive load mechanism, a transmission head, a fixing screw one, a clamping groove seat and a clamping groove; the clamping groove seat is fixedly connected on the transmission shaft of the rudder through a plurality of fixing screw ones, and a clamping groove is formed in the upper side of the clamping groove seat; the lower side of the mounting device is movably connected with the outside of the clamping groove seat, and the bottom of the mounting device is fixedly connected with the top of the rudder; the bottom of the adaptive load mechanism is fixedly connected with the top of the mounting device; the transmission head is located in the central inside of the mounting device, the top of the transmission head is fixedly connected with the lower side input end of the adaptive load mechanism, and the lower side outside of the transmission head is connected with the inside of the clamping groove.

[0005] Preferably, the mounting device comprises a base, a limiting groove, a fixing screw two, a connecting seat, a fixing screw three, a limiting convex groove and a clamping hole; the clamping hole is arranged in the central inside of the lower side of the base, and the inside of the clamping hole is movably connected with the outside of the clamping groove seat; the base is fixedly connected with the upper surface of the rudder through a plurality of fixing screw two; the limiting groove is arranged in the inside of the upper side of the base; the limiting convex groove is arranged in the lower side of the connecting seat, and the outside of the limiting convex groove is connected with the inside of the limiting groove; the connecting seat is fixedly connected with the adaptive load mechanism; and the upper side of the connecting seat is fixedly connected with the upper side of the base through a plurality of fixing screw three.

[0006] Preferably, the adaptive load mechanism comprises a load mechanism, a communication hole one, a communication hole two, a communication hole three, a communication hole four, a valve core mechanism, a transmission shaft and an outer shell; the communication hole two and the communication hole one are arranged in the front and back inside of the left side of the outer shell; the communication hole four and the communication hole three are arranged in the front and back inside of the right side of the outer shell; and the transmission shaft is movably connected with the central inside of the outer shell; the load mechanism is arranged in the lower side of the outer shell; the four openings of the load mechanism are respectively connected with the lower side of the communication hole two, the communication hole one, the communication hole four and the communication hole three; the central of the load mechanism is connected with the lower side of the transmission shaft; the valve core mechanism is arranged in the upper side of the outer shell; the four openings of the valve core mechanism are respectively connected with the upper side of the communication hole two, the communication hole one, the communication hole four and the communication hole three; and the central of the valve core mechanism is connected with the upper side of the transmission shaft.

[0007] Preferably, the load mechanism comprises an inner cavity one, a partition one, a column, an inner cavity two, a partition two, an open hole one and an open hole two; the inner cavity one is arranged inside the rear side of the outer shell, the inner cavity one is provided with the open hole one on the left and right two front sides, and the open hole one is respectively communicated with the communication hole one and the communication hole three; the inner cavity two is arranged inside the front side of the outer shell, the inner cavity two is provided with the open hole two on the left and right two rear sides, and the open hole two is respectively communicated with the communication hole two and the communication hole four; the column is movably connected outside the central part of the outer shell, the central part of the column is fixedly connected with the lower side outside of the transmission shaft, the rear side of the column is fixedly connected with the partition one, and the partition one is movably connected inside the inner cavity one, and the front side of the column is fixedly connected with the partition two, and the partition two is movably connected inside the inner cavity two.

[0008] Preferably, the inner cavity one and the inner cavity two are both in a fan shape.

[0009] Preferably, the valve core mechanism comprises an output pipe, an input pipe, an inner groove one, an input groove, a three-way pipe one, a three-way pipe two, an inner groove two, a communication groove one, a valve core body, an output hole and a communication groove two; the valve core body is movably connected outside the central part of the upper side of the outer shell, the valve core body is provided with the communication groove two and the communication groove one outside, and the central part of the valve core body is fixedly connected with the upper side outside of the transmission shaft; the inner groove one, the input groove, the inner groove two and the output hole are sequentially arranged on the inner wall of the central part of the outer shell; the three-way pipe one is fixedly connected inside the rear side of the outer shell, and the three openings of the three-way pipe one are respectively communicated with the inner part of the communication hole one, the inner groove one and the communication hole four; the three-way pipe two is fixedly connected inside the front side of the outer shell, and the three openings of the three-way pipe two are respectively communicated with the communication hole three, the inner groove two and the communication hole two; the input pipe is arranged inside the rear side of the outer shell, and the input pipe is communicated with the inner part of the input groove; the output pipe is arranged inside the left rear side of the outer shell, and the output pipe is communicated with the inner part of the output hole.

[0010] Preferably, the inner groove one, the input groove and the inner groove two are all fan-shaped grooves.

[0011] Preferably, the communication groove one and the communication groove two are both fan-shaped grooves.

[0012] The present application has the advantages of reasonable structure, low production cost and convenient installation, without the need for customizing complex connection structures for different types of rudders, and the device can be quickly connected with the rudder through simple assembly design, greatly improving the universality and test preparation efficiency of the device, and reducing the equipment investment and maintenance cost.

[0013] (2) The application realizes the adaptive adjustment function of the load, can dynamically change the hydraulic oil input flow according to the steering gear rotation state, makes the load force accurately match the steering gear operation process, avoids the load mutation problem easily occurred in the traditional rigid load structure, and effectively improves the authenticity and reliability of the test data.

[0014] (3) The application constructs a stable and efficient hydraulic circuit through the synchronous linkage design of the load mechanism and the valve core mechanism, makes the hydraulic oil delivery and return path clear and smooth, ensures the stable application of the load force and the internal pressure balance, and provides a strong guarantee for the smooth operation of the test process.

[0015] (4) The application can accurately simulate the load stress condition in the actual work of the steering gear, through the cooperative action of the load feedback force and the steering gear power, can intuitively judge whether the performance of the steering gear under the load working condition is qualified, and provides accurate and effective judgment basis for the steering gear quality detection.

[0016] (5) The core components of the application cooperate stably, the relative fixation of the overall device is maintained through the limiting structure during the test process, the influence of component shaking on the test precision is avoided, meanwhile, the components can quickly restore the initial state after the test is completed, which is convenient for the subsequent test, and improves the overall test efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the application.

[0018] Figure 2 is a sectional view of Figure 1 .

[0019] Figure 3 is a structural schematic diagram of the mounting device.

[0020] Figure 4 is a sectional view of the adaptive load mechanism.

[0021] Figure 5 is another sectional view of the adaptive load mechanism.

[0022] Figure 6 is a structural schematic diagram of the load mechanism.

[0023] Figure 7 is a structural schematic diagram of the valve core mechanism.

[0024] 1-mounting device; 2-adaptive load mechanism; 3-transmission head; 4-fixed screw one; 5-slot seat; 6-slot; 11-base; 12-limiting groove; 13-fixed screw two; 14-connection seat; 15-fixed screw three; 16-limiting convex groove; 17-card hole; 21-load mechanism; 22-communication hole one; 23-communication hole two; 24-communication hole three; 25-communication hole four; 26-valve core mechanism; 27-transmission shaft; 28-outer shell; 211-inner cavity one; 212-separation block one; 213-cylinder; 214-inner cavity two; 215-separation block two; 216-opening hole one; 217-opening hole two; 261-output pipe; 262-input pipe; 263-inner groove one; 264-input groove; 265-three-way pipe one; 266-three-way pipe two; 267-inner groove two; 268-communication groove one; 269-valve core body; 2610-output hole; 2611-communication groove two. DETAILED DESCRIPTION

[0025] As shown in Figure 1 and Figure 2 , the present detailed description adopts the following technical solution: a rudder load test device, comprising a mounting device 1, an adaptive load mechanism 2, a transmission head 3, a fixed screw one 4, a slot seat 5 and a slot 6; the slot seat 5 is fixedly connected on the transmission shaft of the rudder through a plurality of fixed screw one 4, and a slot 6 is formed in the upper side of the slot seat 5; the lower side of the mounting device 1 is movably connected with the outside of the slot seat 5, and the bottom of the mounting device 1 is fixedly connected on the top of the rudder; the bottom of the adaptive load mechanism 2 is fixedly connected on the top of the mounting device 1; the transmission head 3 is located in the central inside of the mounting device 1, the top of the transmission head 3 is fixedly connected with the lower side input end of the adaptive load mechanism 2, and the lower side outside of the transmission head 3 is connected with the inside of the slot 6.

[0026] As shown in Figure 3 , the mounting device 1 comprises a base 11, a limiting groove 12, a fixed screw two 13, a connection seat 14, a fixed screw three 15, a limiting convex groove 16 and a card hole 17; the lower side central inside of the base 11 is provided with the card hole 17, and the inside of the card hole 17 is movably connected with the outside of the slot seat 5; the base 11 is fixedly connected on the rudder through a plurality of fixed screw two 13 around the base 11, and the upper side inside of the base 11 is provided with the limiting groove 12; the lower side of the connection seat 14 is provided with the limiting convex groove 16, and the outside of the limiting convex groove 16 is connected with the inside of the limiting groove 12; the top of the connection seat 14 is fixedly connected with the adaptive load mechanism 2, and the upper side around of the connection seat 14 is fixedly connected on the upper side around of the base 11 through a plurality of fixed screw three 15.

[0027] As shown in Figure 4 and Figure 5As shown, the adaptive load mechanism 2 includes a load mechanism 21, a first connecting hole 22, a second connecting hole 23, a third connecting hole 24, a fourth connecting hole 25, a valve core mechanism 26, a drive shaft 27, and a housing 28. The housing 28 has a second connecting hole 23 and a first connecting hole 22 located on the front and rear sides of its left center, and a fourth connecting hole 25 and a third connecting hole 24 located on the front and rear sides of its right center. The drive shaft 27 is movably connected to the center of the housing 28. The load mechanism 21 is located within the housing. Inside the lower side of the housing 28, the four openings of the load mechanism 21 are respectively connected to the lower sides of the connecting hole 23, connecting hole 1 22, connecting hole 4 25 and connecting hole 3 24, and the center of the load mechanism 21 is connected to the lower side of the drive shaft 27; the valve core mechanism 26 is located inside the upper side of the housing 28, and the four openings of the valve core mechanism 26 are respectively connected to the upper sides of the connecting hole 23, connecting hole 1 22, connecting hole 4 25 and connecting hole 3 24, and the center of the valve core mechanism 26 is connected to the upper side of the drive shaft 27.

[0028] like Figure 6 As shown, the load mechanism 21 includes an inner cavity 211, a partition 212, a column 213, an inner cavity 214, a partition 215, an opening 216, and an opening 217. The inner cavity 211 is located inside the rear side of the outer shell 28, and openings 216 are provided on both the left and right front sides of the inner cavity 211, respectively, and the openings 216 are connected to the connecting hole 22 and the connecting hole 24. The inner cavity 214 is located inside the front side of the outer shell 28, and openings 216 are provided on both the left and right rear sides of the inner cavity 214. An opening hole 217 is provided, and the opening hole 217 is connected to the connecting hole 23 and the connecting hole 4 25 respectively; the column 213 is externally movably connected to the center interior of the outer shell 28, the center interior of the column 213 is fixedly connected to the lower exterior of the drive shaft 27, a partition block 212 is fixedly connected to the rear side of the column 213, and the partition block 212 is movably connected to the interior cavity 211, and a partition block 215 is fixedly connected to the front side of the column 213, and the partition block 215 is movably connected to the interior cavity 214.

[0029] Both the first inner cavity 211 and the second inner cavity 214 are fan-shaped.

[0030] like Figure 7As shown, the valve core mechanism 26 includes an output pipe 261, an input pipe 262, an inner groove 263, an input groove 264, a three-way pipe 265, a two-way pipe 266, an inner groove 267, a connecting groove 268, a valve core body 269, an output hole 2610, and a connecting groove 2611. The valve core body 269 is externally movably connected to the upper center of the outer casing 28. The valve core body 269 has a connecting groove 2611 and a connecting groove 268 on its exterior. The central interior of the valve core body 269 is fixedly connected to the upper exterior of the drive shaft 27. The inner groove 263, the input groove 264, the inner groove 267, and the output hole 2610 are sequentially formed on the outer casing 28. On the central inner wall; the first three-way pipe 265 is fixedly connected to the interior of the rear side of the outer shell 28, and the three openings of the first three-way pipe 265 are respectively connected to the interior of the first connecting hole 22, the inner groove 263 and the fourth connecting hole 25; the second three-way pipe 266 is fixedly connected to the interior of the front side of the outer shell 28, and the three openings of the second three-way pipe 266 are respectively connected to the third connecting hole 24, the inner groove 267 and the second connecting hole 23; the input pipe 262 is located inside the rear side of the outer shell 28, and the input pipe 262 is connected to the interior of the input groove 264; the output pipe 261 is located inside the left rear side of the outer shell 28, and the output pipe 261 is connected to the interior of the output hole 2610.

[0031] Among them, inner groove 1 263, input groove 264 and inner groove 2 267 are all fan-shaped grooves; connecting groove 1 268 and connecting groove 2 2611 are both fan-shaped grooves.

[0032] The invention is used in the following way: It has a reasonable and simple structure, low production cost, convenient installation, and complete functions. During testing, the servo motor drives its own transmission shaft to rotate, which in turn drives the transmission shaft 27 of the adaptive load mechanism 2 to rotate synchronously via the slot 5 and transmission head 3. Taking clockwise rotation of the transmission shaft 27 as a typical scenario, when the servo motor transmission shaft rotates, the slot 5, fixed to it by the fixing screw 4, rotates accordingly. The slot 6, through its engagement with the transmission head 3, drives the transmission head 3 to rotate synchronously, thereby driving the transmission shaft 27 of the adaptive load mechanism 2 to rotate clockwise. The transmission shaft 27 simultaneously drives the two core components connected vertically: the column 213 fixedly connected to the lower side and the valve core 269 fixedly connected to the upper side, thus realizing the connection between the load mechanism 21 and the valve core mechanism. Synchronous linkage of mechanism 26: When valve core 269 rotates clockwise with transmission shaft 27, the communication area between its external fan-shaped connecting groove 2611 and the input groove 264 on the inner wall of outer shell 28 gradually increases, realizing adaptive adjustment of hydraulic oil input flow. Hydraulic oil from the external hydraulic system enters input groove 264 through input pipe 262, and after being diverted by connecting groove 2611, it enters load mechanism 21 through two paths: First path: Hydraulic oil is diverted through three-way pipe 265, part of which is conveyed downward through connecting hole 22, and the other part is conveyed downward through connecting hole 25. Three-way pipe 265 simultaneously achieves internal connection between connecting hole 22, inner groove 263 and connecting hole 25, ensuring stable oil delivery; Second path: Hydraulic oil is split through the two-way pipe 266. One part is delivered downwards through the connecting hole 24, and the other part is delivered downwards through the connecting hole 23. The three-way pipe 266 enables internal communication between the connecting hole 24, the inner groove 267, and the connecting hole 23. At this time, the connecting groove 268 on the valve core body 269, the inner groove 267 of the outer shell 28, and the output hole 2610 form a through circuit, providing a channel for the return of hydraulic oil. The return oil finally flows back to the external hydraulic system through the output pipe 261. When the column 213 of the load mechanism 21 rotates clockwise with the drive shaft 27, the partition blocks 212 and 215 fixed on its front and rear sides rotate synchronously in the fan-shaped inner cavities 211 and 214, respectively, coordinating with the hydraulic oil delivered by the valve core mechanism 26. Load-bearing capacity: Inner cavity 1 211 receives hydraulic oil from connecting hole 1 22 through opening hole 1 216. The oil pushes partition 1 212 to rotate clockwise, providing auxiliary driving force for column 213 in the clockwise direction; Inner cavity 214 receives hydraulic oil from connecting hole 4 25 through opening hole 217. The oil pushes partition 2 215 to rotate clockwise, further enhancing the clockwise rotation force of column 213, forming a load feedback force coordinated with the servo motor power. At the same time, the rotation of the partition causes the return oil in the inner cavity to be discharged through the corresponding channel: the hydraulic oil on the right side of inner cavity 1 211 enters connecting hole 3 24 through opening hole 1 216, and then enters output pipe 261 through three-way pipe 266, inner groove 267, connecting groove 1 268, and output hole 2610;Hydraulic oil from the left side of inner cavity 214 enters connecting hole 23 through opening hole 217, and then flows into the same return oil path through three-way pipe 266, ensuring internal pressure balance of load mechanism 21. Under the above load, if the servo motor can maintain the preset working angle, it indicates that its load bearing performance meets the requirements; if the servo motor cannot maintain the preset angle, and the speed decreases or the angle deviates, its load performance is deemed unqualified. Throughout the process, the base 11 and connecting seat 14 of mounting device 1 are kept relatively fixed through the cooperation of limiting groove 12 and limiting protrusion 16, ensuring the stable operation of load mechanism 21 and valve core mechanism 26, providing structural support for the accuracy of test results. After the test, the external hydraulic system is first shut off to stop the hydraulic oil supply, and then the servo motor power is turned off. The drive shaft 27 gradually stops rotating, and the valve core body 269 and column 213 return to their initial positions. At this time, the hydraulic oil in each connecting hole, inner cavity and pipe is drained through output pipe 261, and all components of the device return to their initial state, ready for the next test or disassembly and storage.

[0033] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

[0036] The control method of this invention is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this invention is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

Claims

1. A servo motor load testing device, characterized in that: It includes a mounting device (1), an adaptive load mechanism (2), a transmission head (3), a fixing screw (4), a slot seat (5), and a slot (6); The slot seat (5) is fixedly connected to the drive shaft of the servo motor by several fixing screws (4), and a slot (6) is provided in the center of the upper side of the slot seat (5). The mounting device (1) is movably connected to the card slot (5) at the lower center, and the bottom of the mounting device (1) is fixedly connected to the top of the servo motor. The bottom of the adaptive load mechanism (2) is fixedly connected to the top of the mounting device (1); The transmission head (3) is located in the center of the mounting device (1). The top of the transmission head (3) is fixedly connected to the lower input end of the adaptive load mechanism (2). The lower outer side of the transmission head (3) is connected to the inside of the slot (6).

2. The servo motor load testing device according to claim 1, characterized in that: The installation device (1) includes a base (11), a limiting groove (12), a second fixing screw (13), a connecting seat (14), a third fixing screw (15), a limiting protrusion (16), and a locking hole (17). The base (11) has a card hole (17) in the center of the lower side, and the inside of the card hole (17) is movably connected to the outside of the card slot (5). The base (11) is fixedly connected to the servo motor by several fixing screws (13) around its perimeter. The base (11) has a limiting groove (12) in the upper side. The lower side of the connecting seat (14) is provided with a limiting protrusion (16), and the outside of the limiting protrusion (16) is connected to the inside of the limiting groove (12). The top of the connecting seat (14) is fixedly connected with an adaptive load mechanism (2). The upper side of the connecting seat (14) is fixedly connected to the upper side of the base (11) by several fixing screws (15).

3. The servo load testing device according to claim 1, characterized in that: The adaptive load mechanism (2) includes a load mechanism (21), a first connecting hole (22), a second connecting hole (23), a third connecting hole (24), a fourth connecting hole (25), a valve core mechanism (26), a transmission shaft (27), and a housing (28). The outer shell (28) has a connecting hole 2 (23) and a connecting hole 1 (22) respectively in the center front and rear of the left side, and a connecting hole 4 (25) and a connecting hole 3 (24) respectively in the center front and rear of the right side, and a drive shaft (27) is movably connected in the center of the outer shell (28). The load mechanism (21) is located inside the lower side of the outer shell (28). The four openings of the load mechanism (21) are respectively connected to the lower side of the connecting hole 2 (23), connecting hole 1 (22), connecting hole 4 (25) and connecting hole 3 (24). The center of the load mechanism (21) is connected to the lower side of the drive shaft (27). The valve core mechanism (26) is located inside the upper side of the outer shell (28). The four openings of the valve core mechanism (26) are connected to the upper side of the connecting hole 2 (23), connecting hole 1 (22), connecting hole 4 (25) and connecting hole 3 (24), respectively. The center of the valve core mechanism (26) is connected to the upper side of the transmission shaft (27).

4. The servo motor load testing device according to claim 3, characterized in that: The load mechanism (21) includes an inner cavity one (211), a partition one (212), a column (213), an inner cavity two (214), a partition two (215), an opening hole one (216) and an opening hole two (217). The inner cavity 1 (211) is located inside the rear side of the outer shell (28). The inner cavity 1 (211) has opening holes 1 (216) on both the left and right front sides, and the opening holes 1 (216) are connected to the connecting hole 1 (22) and the connecting hole 3 (24) respectively. The inner cavity two (214) is located inside the front side of the outer shell (28). The inner cavity two (214) has two opening holes two (217) on the left and right rear sides, and the opening holes two (217) are connected to the connecting hole two (23) and the connecting hole four (25) respectively. The column (213) is externally movably connected to the center of the outer shell (28). The center of the column (213) is fixedly connected to the lower side of the drive shaft (27). A partition block (212) is fixedly connected to the rear side of the column (213), and the partition block (212) is movably connected to the inner cavity (211). A partition block (215) is fixedly connected to the front side of the column (213), and the partition block (215) is movably connected to the inner cavity (214).

5. The servo motor load testing device according to claim 4, characterized in that: Both the first inner cavity (211) and the second inner cavity (214) are fan-shaped.

6. The servo motor load testing device according to claim 3, characterized in that: The valve core mechanism (26) includes an output pipe (261), an input pipe (262), an inner groove one (263), an input groove (264), a three-way pipe one (265), a three-way pipe two (266), an inner groove two (267), a connecting groove one (268), a valve core body (269), an output hole (2610), and a connecting groove two (2611). The valve core (269) is externally movably connected to the upper center of the outer shell (28). The valve core (269) is provided with a second connecting groove (2611) and a first connecting groove (268) on its outside. The central interior of the valve core (269) is fixedly connected to the upper exterior of the drive shaft (27). The inner groove one (263), input groove (264), inner groove two (267) and output hole (2610) are respectively opened on the central inner wall of the outer shell (28); The first three-way pipe (265) is fixedly connected to the inside of the rear side of the outer shell (28), and the three openings of the first three-way pipe (265) are respectively connected to the inside of the first connecting hole (22), the first inner groove (263) and the fourth connecting hole (25); The three-way pipe two (266) is fixedly connected to the inside of the front side of the outer shell (28), and the three openings of the three-way pipe two (266) are respectively connected to the connecting hole three (24), the inner groove two (267) and the connecting hole two (23); The input pipe (262) is located inside the rear side of the outer casing (28), and the input pipe (262) is connected to the inside of the input slot (264); The output tube (261) is located inside the left rear side of the outer casing (28), and the output tube (261) is connected to the inside of the output hole (2610).

7. The servo load testing device according to claim 6, characterized in that: The inner groove one (263), the input groove (264) and the inner groove two (267) are all sector-shaped grooves.

8. The servo motor load testing device according to claim 6, characterized in that: Both the first connecting slot (268) and the second connecting slot (2611) are sector-shaped slots.

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