A rudder load testing device
By designing the synchronous linkage between the adaptive load mechanism and the valve core mechanism, the servo motor load test device achieves high-precision, low-cost, and highly versatile load adjustment, solving the problems of low simulation accuracy, non-adaptive adjustment, and high cost of existing devices, and improving test efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU MASADA HEAVY INDS
- Filing Date
- 2026-02-11
- Publication Date
- 2026-06-02
AI Technical Summary
Existing ship steering gear load testing equipment suffers from low simulation accuracy, non-adaptive load adjustment, poor versatility, and high testing costs, making it difficult to meet the high-precision and highly adaptable testing requirements of modern ship steering gears.
A servo motor load testing device was designed, including a mounting device, an adaptive load mechanism, a transmission head, fixing screws, and a slot seat. Through the synchronous linkage between the adaptive load mechanism and the valve core mechanism, the adaptive adjustment of the load and the stabilization of the hydraulic circuit are realized, ensuring that the load force is accurately matched with the servo motor operation process.
It improves the authenticity and reliability of test data, reduces equipment investment and maintenance costs, and increases test efficiency and accuracy. It can accurately simulate the load and stress conditions of servo motors in actual operation and provides accurate performance judgment basis.
Smart Images
Figure CN121702782B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of ship steering gear technology, and in particular to a steering gear load testing device. Background Technology
[0002] As the core actuator for ship course control, the stability of the ship's steering gear under complex loads such as wind, waves, and current impacts directly determines navigation safety and control precision. Therefore, its reliability must be verified through load tests simulating real ship conditions before leaving the factory. Existing ship steering gear load testing devices are mainly divided into two types: hydraulic top-loading and simulated rudder blade hydrodynamic loading. The former directly converts the load force into the hydraulic cylinder load of the steering gear, which cannot reproduce the nonlinear hydrodynamic characteristics experienced by the rudder blade in a real ship, resulting in significant deviations from actual navigation conditions. The latter, while closer to reality, has many shortcomings. For example, the theoretical loading point of the ship's balance rudder is prone to spatial interference with the rudder stock transmission mechanism, forcing the loading point to be moved aft to the trailing edge of the rudder blade. This also leads to an inability to simultaneously achieve the simulation accuracy of the load normal force and steering torque, making it difficult to match the load requirements of ships of different tonnages. At the same time, traditional devices mostly use rigid load structures, which cannot adaptively adjust the load according to the angle changes of the ship's steering gear during the turning process. Sudden load changes are prone to occur during the test, especially when simulating extreme conditions such as emergency turns, resulting in significant distortion of test data. Furthermore, existing devices are cumbersome to install, requiring customized connection tooling for different ship steering gear models, such as those for container ships and bulk carriers. This results in extremely poor versatility, insufficient stability of core components, and complex hydraulic circuit designs prone to leaks, leading to low testing efficiency and high equipment maintenance costs. These problems make existing devices unable to meet the high-precision and highly adaptable testing requirements of modern ship steering gears. Therefore, there is an urgent need for a testing device with a simple structure, convenient installation, and the ability to adaptively adjust the load to accurately simulate the load characteristics of real ships, improve testing accuracy and versatility, and reduce testing costs. Summary of the Invention
[0003] The purpose of this invention is to provide a steering gear load testing device to solve the above-mentioned problems, thereby addressing the issues of low simulation accuracy, non-adaptive load adjustment, poor versatility, and high testing costs of existing ship steering gear load testing devices.
[0004] To address the aforementioned problems, this invention provides a technical solution: a servo motor load testing device, comprising a mounting device, an adaptive load mechanism, a transmission head, a fixing screw, a slot seat, and a slot; the slot seat is fixedly connected to the drive shaft of the servo motor by several fixing screws, and a slot is formed in the center of the upper side of the slot seat; the lower center of the mounting device is movably connected to the outside of the slot seat, and the bottom of the mounting device is fixedly connected to the top of the servo motor; the bottom of the adaptive load mechanism is fixedly connected to the top of the mounting device; the transmission head is located in the center of the mounting device, the top of the transmission head is fixedly connected to the lower input end of the adaptive load mechanism, and the lower outside of the transmission head is connected to the inside of the slot.
[0005] Preferably, the mounting device includes a base, a limiting groove, two fixing screws, a connecting seat, three fixing screws, a limiting protrusion, and a locking hole; the lower center of the base has a locking hole, and the inside of the locking hole is movably connected to the outside of the locking seat; the base is fixedly connected to the servo motor around its perimeter by several two fixing screws; the upper side of the base has a limiting groove; the lower side of the connecting seat has a limiting protrusion, and the outside of the limiting protrusion is connected to the inside of the limiting groove; an adaptive load mechanism is fixedly connected to the top of the connecting seat; the upper perimeter of the connecting seat is fixedly connected to the upper perimeter of the base around its perimeter by several three fixing screws.
[0006] Preferably, the adaptive load mechanism includes a load mechanism, a connecting hole one, a connecting hole two, a connecting hole three, a connecting hole four, a valve core mechanism, a drive shaft, and a housing. The housing has connecting holes two and one respectively located inside the center front and rear of the left side, and connecting holes four and three respectively located inside the center front and rear of the right side. The drive shaft is movably connected inside the center of the housing. The load mechanism is located inside the lower side of the housing, with its four openings communicating with the lower sides of connecting holes two, one, four, and three respectively. The center of the load mechanism is connected to the lower side of the drive shaft. The valve core mechanism is located inside the upper side of the housing, with its four openings communicating with the upper sides of connecting holes two, one, four, and three respectively. The center of the valve core mechanism is connected to the upper side of the drive shaft.
[0007] Preferably, the load mechanism includes an inner cavity one, a partition one, a column, an inner cavity two, a partition two, an opening one, and an opening two; the inner cavity one is located inside the rear side of the outer shell, and the inner cavity one has openings one on both the left and right front sides, and the openings one are respectively connected to connecting holes one and three; the inner cavity two is located inside the front side of the outer shell, and the inner cavity two has openings two on both the left and right rear sides, and the openings two are respectively connected to connecting holes two and four; the column is externally movably connected to the center of the outer shell, and the center of the column is fixedly connected to the lower side of the drive shaft; a partition one is fixedly connected to the rear side of the column and movably connected inside the inner cavity one; a partition two is fixedly connected to the front side of the column and movably connected inside the inner cavity two.
[0008] Preferably, both the first inner cavity and the second inner cavity are fan-shaped.
[0009] Preferably, the valve core mechanism includes an output pipe, an input pipe, an inner groove 1, an input groove, a three-way pipe 1, a three-way pipe 2, an inner groove 2, a connecting groove 1, a valve core body, an output hole, and a connecting groove 2. The valve core body is externally movably connected to the inner center of the upper side of the outer casing. The valve core body has connecting groove 2 and connecting groove 1 on its outer side. The inner center of the valve core body is fixedly connected to the outer side of the upper side of the drive shaft. The inner groove 1, the input groove, the inner groove 2, and the output hole are sequentially formed on the inner wall of the inner center of the outer casing. The three-way pipe 1 is fixedly connected to the inner rear side of the outer casing. The three openings of the three-way pipe 1 are respectively connected to the inner interior of connecting hole 1, inner groove 1, and connecting hole 4. The three-way pipe 2 is fixedly connected to the inner front side of the outer casing. The three openings of the three-way pipe 2 are respectively connected to the inner interior of connecting hole 3, inner groove 2, and connecting hole 2. The input pipe is located inside the inner rear side of the outer casing and is connected to the inner interior of the input groove. The output pipe is located inside the inner left rear side of the outer casing and is connected to the inner interior of the output hole.
[0010] Preferably, the inner groove one, the input groove and the inner groove two are all sector-shaped grooves.
[0011] Preferably, both the first connecting groove and the second connecting groove are sector-shaped grooves.
[0012] The beneficial effects of the present invention are: (1) The present invention has the characteristics of reasonable and simple structure, low production cost and convenient installation. There is no need to customize complex connection structure for different models of servo motors. The docking with the servo motor can be completed quickly through simple assembly design, which greatly improves the versatility of the device and the efficiency of test preparation, and reduces equipment investment and maintenance costs.
[0013] (2) The present invention realizes the adaptive adjustment function of the load, which can dynamically change the hydraulic oil input flow according to the rotation state of the servo motor, so that the load force is accurately matched with the operation of the servo motor, avoiding the load change problem that is easy to occur in the traditional rigid load structure, and effectively improving the authenticity and reliability of the test data.
[0014] (3) The present invention constructs a stable and efficient hydraulic circuit through the synchronous linkage design of the load mechanism and the valve core mechanism, making the hydraulic oil delivery and return path clear and smooth, ensuring the stable application of load force and internal pressure balance, and providing a strong guarantee for the smooth operation of the test process.
[0015] (4) This invention can accurately simulate the load force situation of the servo motor in actual operation. Through the synergistic effect of load feedback force and servo motor power, it can intuitively judge whether the performance of the servo motor under load conditions is qualified, providing an accurate and effective judgment basis for servo motor quality inspection.
[0016] (5) The core components of the present invention are stable and the overall device is kept relatively fixed during the test by the limiting structure, which avoids the impact of component shaking on the test accuracy. At the same time, after the test is completed, each component can quickly return to its initial state, which facilitates the subsequent test and improves the overall test efficiency. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the present invention.
[0018] Figure 2 for Figure 1 A sectional view.
[0019] Figure 3 This is a schematic diagram of the installation device.
[0020] Figure 4 A cross-sectional view of the adaptive load mechanism.
[0021] Figure 5 Another cross-sectional view of the adaptive load mechanism.
[0022] Figure 6 This is a schematic diagram of the load mechanism.
[0023] Figure 7 This is a schematic diagram of the valve core mechanism.
[0024] 1- Mounting device; 2- Adaptive load mechanism; 3- Transmission head; 4- Fixing screw one; 5- Slot seat; 6- Slot; 11- Base; 12- Limiting groove; 13- Fixing screw two; 14- Connecting seat; 15- Fixing screw three; 16- Limiting protrusion; 17- Slot hole; 21- Load mechanism; 22- Connecting hole one; 23- Connecting hole two; 24- Connecting hole three; 25- Connecting hole four; 26- Valve core mechanism; 27- Transmission shaft; 28- Outer 211-Inner cavity one; 212-Partition one; 213-Column; 214-Inner cavity two; 215-Partition two; 216-Opening hole one; 217-Opening hole two; 261-Output pipe; 262-Input pipe; 263-Inner groove one; 264-Input groove; 265-Tee pipe one; 266-Tee pipe two; 267-Inner groove two; 268-Connecting groove one; 269-Valve core; 2610-Output hole; 2611-Connecting groove two. Detailed Implementation
[0025] like Figure 1 and Figure 2 As shown, this specific embodiment adopts the following technical solution: a servo motor load testing device, including a mounting device 1, an adaptive load mechanism 2, a transmission head 3, fixing screws 4, a slot seat 5, and a slot 6; the slot seat 5 is fixedly connected to the transmission 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 lower center of the mounting device 1 is movably connected to the outside of the slot seat 5, 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, and the lower outside of the transmission head 3 is connected to the inside of the slot 6.
[0026] like Figure 3 As shown, the mounting 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 lower center of the base 11 has a locking hole 17, and the inside of the locking hole 17 is movably connected to the outside of the locking seat 5. The base 11 is fixedly connected to the servo motor around its perimeter by several second fixing screws 13. The upper side of the base 11 has a limiting groove 12. The lower side of the connecting seat 14 has 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 to an adaptive load mechanism 2. The upper perimeter of the connecting seat 14 is fixedly connected to the upper perimeter of the base 11 by several third fixing screws 15.
[0027] like 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). 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).
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 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 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 one (212) is fixedly connected to the rear side of the column (213), and the partition block one (212) is movably connected to the interior of the inner cavity one (211). A partition block two (215) is fixedly connected to the front side of the column (213), and the partition block two (215) is movably connected to the interior of the inner cavity two (214).
4. The servo motor load testing device according to claim 3, characterized in that: Both the first inner cavity (211) and the second inner cavity (214) are fan-shaped.
5. The servo load testing device according to claim 1, 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).
6. The servo load testing device according to claim 5, characterized in that: The inner groove one (263), the input groove (264) and the inner groove two (267) are all sector-shaped grooves.
7. The servo load testing device according to claim 5, characterized in that: Both the first connecting slot (268) and the second connecting slot (2611) are sector-shaped slots.