Torque limiter

Abstract

The application relates to a torque limiter, belonging to the technical field of mechanical manufacturing. The torque limiter comprises a driving end flange, a driven end flange and a plurality of ejector pin devices. The plurality of ejector pin devices are arranged at intervals along the circumference of the driven end flange and are connected with the driven end flange; and the plurality of ejector pin devices are arranged in pairs symmetrically relative to the central axis of the driven end flange. The ejector pin devices are movably connected with the driving end flange. In normal working conditions, the torque is transmitted by the contact between the force applied by the ejector pin devices and the driving end flange; when the system is overloaded, the overload force overcomes the force applied by the ejector pin devices to make the ejector pin slide or displace to cut off the power, thereby quickly responding to the protection system, and the torque limiter can be automatically reset after the overload is eliminated. In addition, the torque is uniformly distributed due to the symmetric distribution and the movable connection characteristics, the work is stable, and the convenience and the work efficiency of the equipment are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing technology, and in particular to a torque limiter. Background Technology

[0002] A torque limiter is a mechanical power overload protection device, which is usually installed between the drive side and the load side of a power transmission. Once an overload occurs and the transmitted torque exceeds the set value, the torque limiter will disengage or slip, thereby separating the drive and driven sides of the power transmission and preventing the equipment from being damaged by overload.

[0003] Most current torque limiters are designed for small, non-professional passive protection scenarios and have poor torque limiting and adjustment capabilities for high-power and high-torque scenarios. Utility Model Content

[0004] This application provides a torque limiter designed to improve the ability to limit and adjust torque in high-power and high-torque scenarios.

[0005] To achieve the above objectives, according to a first aspect of this application, a torque limiter is provided, comprising:

[0006] The active end flange is configured to connect to the output end of the motor;

[0007] The driven end flange is connected to the driving end flange, and the driven end flange is configured to be connected to the coupling;

[0008] Multiple ejector pin devices are arranged at circumferential intervals along the driven end flange and connected to the driven end flange; the multiple ejector pin devices are arranged symmetrically in pairs relative to the central axis of the driven end flange; the ejector pin devices are movably connected to the driving end flange.

[0009] Optionally, it also includes a transmission connection part, which is connected to the driving end flange and the driven end flange respectively.

[0010] Optionally, the transmission connection includes an intermediate slewing bearing and an adapter plate. The intermediate slewing bearing is installed at the end of the driving flange closest to the motor, and the intermediate slewing bearing is connected to the driven flange through the adapter plate.

[0011] Optionally, the active end flange has a tapered bore;

[0012] The ejector pin device includes:

[0013] The mounting base is partially embedded in the driven end flange and connected to the driven end flange;

[0014] A push rod is inserted into the mounting base and movably connected to the mounting base. A groove is provided at one end of the push rod facing the tapered hole, and the tapered hole and the groove form an accommodating space.

[0015] A steel ball is housed within the accommodating space.

[0016] Optionally, the active end flange includes a flange body and a mounting block connected to each other. The flange body has a mounting groove for accommodating the mounting block, and the tapered hole is formed on the mounting block.

[0017] Optionally, the active end flange further includes a gasket, which is disposed between the bottom of the mounting groove and the mounting block.

[0018] Optionally, the mounting base includes a mounting base body and a protrusion connected together, and the push rod is embedded in the protrusion;

[0019] The top rod includes a connected end and a rod body, the slot is formed on the end, and the end is embedded in the protrusion;

[0020] The ejector pin device also includes a clamping assembly connected to the mounting base body, with a portion of the clamping assembly located between the inner wall of the mounting base body and the rod.

[0021] When torque is transmitted between the active end flange and the driven end flange, the end of the clamping assembly facing the steel ball is pressed against the protrusion and the end.

[0022] Optionally, the clamping assembly includes:

[0023] An elastic component is connected to the mounting base body, and the elastic component is partially sleeved on the outside of the rod and located between the rod and the mounting base body;

[0024] A wedge is disposed on the side of the elastic component near the steel ball and pressed against the protrusion and the end.

[0025] Optionally, the clamping assembly includes a dial connected to one end of the elastic assembly away from the wedge, and a portion of the dial is located outside the mounting base body.

[0026] Optionally, a reserved cavity is provided between the wedge and the mounting base body;

[0027] When the steel ball is lifted, the wedge moves to fill the reserved cavity and presses against the protrusion.

[0028] Optionally, the clamping assembly further includes a pressure plate disposed between the elastic component and the wedge, and the pressure plate is movably connected to the rod.

[0029] Optionally, the pressure plate includes a first surface and a second surface disposed opposite to each other, the first surface being connected to the elastic component and the second surface being connected to the wedge; the side of the second surface away from the mounting base body is retracted towards the first surface.

[0030] The torque limiter of this application embodiment includes a driving end flange, a driven end flange, and a plurality of ejector pin devices. The driving end flange is configured to connect to the output end of a motor. The driven end flange is connected to the driving end flange and is configured to connect to a coupling. The plurality of ejector pin devices are spaced apart circumferentially along the driven end flange and connected to it. The plurality of ejector pin devices are symmetrically arranged in pairs relative to the central axis of the driven end flange. The ejector pin device is movably connected to the active end flange. The active end flange of the torque limiter in this application is securely connected to the motor output shaft by bolts or keys, ensuring efficient and stable power transmission and facilitating equipment maintenance. The driven end flange is connected to the active end flange and is adapted to a coupling, enabling flexible connection of different subsequent transmission components, ensuring balanced force transmission, reducing vibration and noise, and improving equipment reliability and lifespan. Multiple ejector pin devices are symmetrically arranged in pairs along the circumferential distance of the driven end flange and movably connected to the active end flange. Under normal operating conditions, torque transmission is achieved by the force applied by the ejector pin device contacting the active end flange. When the system is overloaded, the overload force overcomes the force applied by the ejector pin device, causing the ejector pin to slide or displace and cut off the power, providing a rapid response protection system. It can also automatically reset after the overload is eliminated. With its symmetrical distribution and movable connection characteristics, it can also achieve uniform torque distribution, ensuring stable operation and significantly improving the ease of use and work efficiency of the equipment.

[0031] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0034] Figure 1 This is a cross-sectional schematic diagram of the torque limiter provided in an exemplary embodiment of this disclosure;

[0035] Figure 2 yes Figure 1 A magnified view of the structure at point A in the middle;

[0036] Figure 3 This is a detailed cross-sectional view of the ejector pin device and the active end flange provided in the exemplary embodiments of this disclosure;

[0037] Figure 4 This is a schematic diagram of the structure of the active end flange near the ejector pin device provided in an exemplary embodiment of this disclosure;

[0038] Figure 5 This is a schematic diagram of the structure of the ejector device provided in an exemplary embodiment of this disclosure.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100 - Active end flange; 110 - Tapered bore; 120 - Flange body; 121 - Mounting groove; 130 - Mounting block; 140 - Gasket;

[0041] 200 - Driven flange;

[0042] 300-Ejector pin device; 310-Mounting base; 311-Mounting base body; 312-Protrusion; 320-Ejector rod; 321-Slot; 322-End; 323-Rod body; 324-Transition surface; 330-Steel ball; 340-Clamping assembly; 341-Elastic assembly; 3411-Elastic part; 3412-Adjusting part; 342-Wedge block; 343-Digital dial; 344-Pressure plate; 3441-First surface; 3442-Second surface; 350-Reserved cavity;

[0043] 400 - Transmission connection part; 410 - Intermediate slewing bearing; 420 - Adapter plate;

[0044] 500 - storage space;

[0045] 600-bolt. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0048] A torque limiter is a mechanical power overload protection device, which is usually installed between the drive side and the load side of a power transmission. Once an overload occurs and the transmitted torque exceeds the set value, the torque limiter will disengage or slip, thereby separating the drive and driven sides of the power transmission and preventing the equipment from being damaged by overload.

[0049] Friction devices and clutches have limited load-bearing capacity, making it impossible to effectively achieve precise overload protection in high-power transmission systems. Long-term operation leads to temperature rise and frictional wear, causing wear on friction components and gradually degrading the performance of the torque limiter. This ultimately affects the accuracy and timeliness of overload protection, and may even damage the transmission system. Traditional torque limiters typically rely on complex friction structures, resulting in poor stability under high loads and complex operating environments, making them prone to protection failure. Therefore, this disclosure proposes a high-torque pin-type torque limiter with a slewing bearing, particularly suitable for high-power, high-torque applications such as wind turbine ground test benches.

[0050] According to the first aspect of this application, please refer to Figure 1This disclosure provides a torque limiter, including a driving flange 100, a driven flange 200, and a plurality of ejector pin devices 300. The driving flange 100 is configured to connect to the output end of a motor. The driven flange 200 is connected to the driving flange 100 and is configured to connect to a coupling. The plurality of ejector pin devices 300 are spaced apart circumferentially along the driven flange 200 and connected to it; the plurality of ejector pin devices 300 are symmetrically arranged in pairs relative to the central axis of the driven flange 200. The ejector pin devices 300 are movably connected to the driving flange 100.

[0051] It should be noted that the active end flange 100 can be firmly connected to the motor output shaft through bolt 600 connection, key connection or other connection methods, so as to reliably transmit the torque output by the motor to the inside of the torque limiter. This reliable connection not only ensures the stability and efficiency of power transmission, avoids slippage and loosening, and ensures the stable operation of the transmission system, but also makes the installation and disassembly of the torque limiter and the motor more convenient, facilitates equipment maintenance and repair, and reduces downtime.

[0052] It should be noted that the driven end flange 200 is connected to the driving end flange 100 and is configured to connect to a coupling. The coupling transmits the torque, processed by the torque limiter, to subsequent transmission components, achieving continuous power transmission. The coupling allows the torque limiter to flexibly adapt to different types and specifications of subsequent transmission components, improving its versatility and applicability.

[0053] It should be noted that the ejector pin device 300 is a crucial component for achieving overload protection. Its symmetrical and spaced arrangement along the circumference of the driven flange 200 ensures even torque distribution, maintains force balance, and improves operational stability. Its movable connection allows for rapid overload response, promptly protecting the transmission system. Dozens of ejector pin devices 300 can be evenly installed around the circumference of the driven flange 200 to ensure stable torque transmission capability of the torque limiter. During normal operation, these ejector pin devices 300 are in close contact with the driving flange 100, collaboratively transmitting torque. When the system is overloaded and the torque exceeds the set limit, the overload force overcomes the force applied by the ejector pin devices 300, causing them to slide or displace relative to the driving flange 100, thus cutting off the power transmission path.

[0054] It should be noted that the ejector pin device 300 is the core component for overload protection. During normal operation, the ejector pin device 300 is in close contact with the driving flange 100, transmitting torque. When the system is overloaded and the torque exceeds the set limit, the overload force overcomes the force applied by the ejector pin device 300, causing it to slide or shift relative to the driving flange 100, thus cutting off the power transmission path. The circumferentially spaced and symmetrical arrangement evenly distributes torque, ensuring force balance and improving operational stability; the movable connection allows for rapid overload response, promptly protecting the transmission system.

[0055] Through the above technical solution, the active end flange 100 of the torque limiter is firmly connected to the motor output shaft by bolts 600 or key connections, ensuring efficient and stable power transmission and facilitating equipment maintenance. The driven end flange 200 is connected to the active end flange 100 and is adapted to a coupling, enabling flexible connection of different subsequent transmission components, ensuring balanced force transmission, reducing vibration and noise, and improving equipment reliability and lifespan. Multiple ejector pin devices 300 are symmetrically arranged in pairs along the circumference of the driven end flange 200 and are movably connected to the active end flange 100. Under normal operating conditions, torque transmission is achieved by the force applied by the ejector pin devices 300 contacting the active end flange 100. When the system is overloaded, the overload force overcomes the force applied by the ejector pin devices 300, causing the ejector pins to slide or displace and cut off the power, providing a rapid response to protect the system. After the overload is eliminated, the system can automatically reset. With its symmetrical distribution and movable connection characteristics, it can also achieve uniform torque distribution, ensuring stable operation and significantly improving the convenience and efficiency of equipment use.

[0056] In some embodiments, please refer to Figure 1 The torque limiter also includes a transmission connection part 400, which is connected to both the driving flange 100 and the driven flange 200. It should be noted that before the ejector pin device 300 is installed onto the driven flange 200, the entire torque limiter structure does not yet possess stable force transmission and load-bearing capacity. At this time, there is a lack of effective support between the driving flange 100 and the driven flange 200, which can easily lead to shaking and misalignment during installation and debugging, affecting installation accuracy and subsequent use. Furthermore, when the power transmission path between the driving flange 100 and the driven flange 200 is cut off, the driving flange 100 and the ejector pin device 300 are in an unstable state. Without support, this could damage equipment components or affect the stability of power transmission during restart. Therefore, this embodiment provides a transmission connection part 400, which can provide reliable support for the driving flange 100 and the driven flange 200 under the above two critical operating conditions, ensuring the relative position between the flanges is stable and avoiding structural damage and installation errors due to lack of support.

[0057] In some embodiments, please refer to Figure 2The transmission connection part 400 includes an intermediate slewing bearing 410 and an adapter plate 420. The intermediate slewing bearing 410 is installed at the end of the driving flange 100 closest to the motor, and the intermediate slewing bearing 410 is connected to the driven flange 200 through the adapter plate 420. It should be noted that the intermediate slewing bearing 410 can provide a flexible and stable slewing support between the driving flange 100 and the driven flange 200. When the driving flange 100 rotates with the motor output shaft, the rolling elements of the intermediate slewing bearing 410 can roll freely in the raceway, reducing the frictional resistance between the flanges, reducing energy loss, and ensuring that the two flanges maintain coaxiality during rotation, avoiding vibration and noise caused by eccentricity. The adapter plate 420 serves as a bridge and fixation mechanism. On one hand, it can be firmly connected to the outer ring of the intermediate slewing bearing 410 through bolts 600 and other connecting parts. On the other hand, it connects to the driven flange 200, evenly transmitting the force of the driving flange 100 to the driven flange 200. Before the installation of the ejector pin device 300, the adapter plate 420 and the intermediate slewing bearing 410 together form a stable support structure to prevent flange swaying from affecting the installation. After the power transmission path is cut off, the adapter plate 420 ensures that the two flanges are relatively fixed, preventing component misalignment. During normal operation, it assists the intermediate slewing bearing 410 in dispersing torque and optimizing force distribution, further improving the stability and reliability of the torque limiter under complex working conditions, and meeting the stringent requirements of high-power and high-torque application scenarios.

[0058] In some embodiments, please refer to Figure 3 The active end flange 100 has a tapered bore 110. The ejector pin device 300 includes a mounting base 310, an ejector rod 320, and a steel ball 330. The mounting base 310 is partially embedded in and connected to the driven end flange 200. This embedded mounting method ensures reliable connection strength between the ejector pin device 300 and the driven end flange 200, providing a stable mounting foundation for the entire ejector pin device 300. The ejector rod 320 passes through the mounting base 310 and is movably connected to the mounting base 310, allowing the ejector rod 320 to move axially within the mounting base 310 to respond to torque changes under different operating conditions. A groove 321 is provided at the end of the ejector rod 320 facing the tapered bore 110, and the tapered bore 110 and the groove 321 form a receiving space 500. The steel ball 330 is received within the receiving space 500.

[0059] It should be noted that under normal operating conditions, the steel ball 330 is tightly fitted into the accommodating space 500 formed by the tapered hole 110 and the slot 321. When the driving flange 100 transmits the torque output from the motor, the steel ball 330 acts as a medium for torque transmission. Through the mutual compression between the steel ball 330 and the tapered hole 110 and the slot 321, the torque is stably transmitted to the push rod 320, and then to the driven flange 200, thus achieving effective power transmission. Due to the special structure of the tapered hole 110, the contact area and pressure distribution between it and the steel ball 330 are relatively uniform, which can effectively avoid local stress concentration and improve the stability and reliability of torque transmission.

[0060] When the system overloads and the transmitted torque exceeds the set value, the excessive torque causes the compressive force on the steel ball 330 to exceed its withstand threshold. Under the action of force, the steel ball 330 overcomes the friction between the mounting base 310 and the push rod 320, as well as the force applied by the ejector pin device 300, and moves relative to the ball within the accommodating space 500. The push rod 320 also moves accordingly, thereby cutting off the power transmission path between the active flange 100 and the driven flange 200, thus providing overload protection. Furthermore, the design of the tapered hole 110 allows the steel ball 330 to trigger the overload protection mechanism more smoothly during movement. Compared to structures with other shapes, its response speed is faster, enabling it to react to overload situations more promptly and effectively preventing equipment damage due to overload. At the same time, the mating structure of the steel ball 330 with the tapered hole 110 and the slot 321 can also buffer the impact force caused by sudden torque changes to a certain extent, further protecting the transmission components of the equipment.

[0061] In some embodiments, please refer to Figure 4 The active end flange 100 includes a flange body 120 and a mounting block 130 connected to each other. The flange body 120 has a mounting groove 121 for accommodating the mounting block 130, and a tapered hole 110 is formed on the mounting block 130. It should be noted that the flange body 120 and the mounting block 130 are mated through the mounting groove 121. The connection between the mounting block 130 and the flange body 120 can be achieved by means of bolts 600, ensuring relative stability during power transmission and preventing loosening that could affect torque transmission. The mounting block 130 is an independent structure, making it easy to manufacture and replace. When the tapered hole 110 wears or is damaged due to long-term use, it is not necessary to replace the entire active end flange 100; only the mounting block 130 needs to be disassembled for repair or replacement, greatly reducing maintenance costs and time.

[0062] From a performance optimization perspective, placing the tapered hole 110 on the mounting block 130 allows for specialized material selection and processing optimization for its critical stress-bearing components. For example, the mounting block 130 can be manufactured from a high-strength, wear-resistant special alloy material, and high-precision machining processes can be used to ensure the dimensional accuracy and surface finish of the tapered hole 110, thereby improving the contact performance between the steel ball 330 and the tapered hole 110, further enhancing the stability and reliability of torque transmission. Simultaneously, this structural design can also optimize the overall weight distribution and mechanical properties of the active end flange 100 to a certain extent, reducing vibrations caused by uneven mass distribution during high-speed rotation, ensuring the smooth operation of the entire torque limiter system, and effectively improving the adaptability and durability of the equipment in high-power, high-torque applications.

[0063] In some embodiments, please refer to Figure 4 The active end flange 100 also includes a gasket 140, which is disposed between the bottom of the mounting groove 121 and the mounting block 130. It should be noted that, for vibration damping, the gasket 140 is typically made of a material with a certain degree of elasticity, such as rubber or silicone. During equipment operation, it can absorb the vibration and impact generated by power transmission in the active end flange 100, reducing the transmission of vibration to other components, lowering the noise of the entire system, and improving the comfort and stability of equipment operation. Furthermore, the gasket 140 can also be used to adjust the gap between the mounting block 130 and the mounting groove 121. By selecting gaskets 140 of different thicknesses, the installation position of the mounting block 130 can be precisely controlled, ensuring that the fit between the tapered hole 110 and the steel ball 330 in the ejector device 300 is optimal, further optimizing torque transmission efficiency, enabling the torque limiter to achieve precise overload protection under different operating conditions, and enhancing the adaptability of the equipment in complex working environments.

[0064] In some embodiments, please refer to Figure 3The mounting base 310 includes a mounting base body 311 and a protrusion 312 connected to each other. The mounting base body 311 is connected to the driven flange 200. The push rod 320 is embedded in the protrusion 312, which makes the positioning of the push rod 320 in the mounting base 310 more accurate, effectively preventing the push rod 320 from shifting or shaking during torque transmission, and ensuring the stability of power transmission. The push rod 320 includes an end 322 and a rod body 323 connected to each other. A groove 321 is formed on the end 322, which is embedded in the protrusion 312. This allows the steel ball 330 to be stably accommodated in the accommodating space 500 formed by the tapered hole 110 of the driving flange 100 and the groove 321 of the push rod 320. During normal torque transmission, the torque is efficiently transmitted to the rod body 323 through the tight fit between the end 322 and the steel ball 330, and then to the driven flange 200. The ejector pin device 300 also includes a clamping assembly 340 connected to the mounting base body 311, with a portion of the clamping assembly 340 located between the inner wall of the mounting base body 311 and the rod body 323. When torque is transmitted between the driving end flange 100 and the driven end flange 200, the end of the clamping assembly 340 facing the steel ball 330 is pressed against the protrusion 312 and the end 322.

[0065] It should be noted that the connection between end 322 and rod 323 has a transition surface 324, which is located near the protrusion 312 on the side of end 322. The presence of the transition surface 324 provides a more reasonable force application point for the clamping assembly 340, helping to enhance the constraint effect of the clamping assembly 340 on the push rod 320. The fact that the end of the clamping assembly 340 facing the steel ball 330 is pressed against the protrusion 312 and end 322 means that the end of the clamping assembly 340 facing the steel ball 330 abuts against the side of the protrusion 312 away from the active end flange 100, and also against the transition surface 324. This allows the clamping assembly 340 to form a stable and uniform pressure on the push rod 320 through the protrusion 312 and the transition surface 324, further reducing the gap between the push rod 320, the steel ball 330, and the active end flange 100, greatly improving the efficiency and reliability of torque transmission. Furthermore, the clamping assembly 340, located between the inner wall of the mounting base body 311 and the rod 323, can constrain and guide the movement of the push rod 320, ensuring that the push rod 320 moves smoothly axially within the mounting base 310. When the system is overloaded, excessive torque will cause the force on the push rod 320 to exceed the pressure applied by the clamping assembly 340 and other resistances. The push rod 320 moves within the mounting base 310, causing the steel ball 330 to disengage from its original position, cutting off the power transmission path and achieving overload protection. The clamping assembly 340 can be pressure-adjusted according to actual working conditions, ensuring a tight connection of components during normal torque transmission and enabling the push rod 320 to act promptly during overload. Combined with the design of the transition surface 324, this further enhances the adaptability and protection accuracy of the torque limiter under different working conditions, ensuring the safe and stable operation of the equipment.

[0066] In some embodiments, please refer to Figure 5 The clamping assembly 340 includes an elastic component 341 and a wedge 342. The elastic component 341 is connected to the mounting base body 311, and part of the elastic component 341 is sleeved on the outside of the rod body 323 and located between the rod body 323 and the mounting base body 311. The wedge 342 is disposed on the side of the elastic component 341 near the steel ball 330 and is pressed against the protrusion 312 and the end 322.

[0067] It should be noted that the elastic component 341 provides an adjustable elastic constraint force to the push rod 320. Under normal torque transmission conditions, the elastic component 341 continuously applies pressure to the wedge block 342 through the elastic force generated by its own deformation, thereby ensuring that the wedge block 342 is tightly pressed against the protrusion 312 and the end 322. This ensures that the push rod 320, the steel ball 330, and the active end flange 100 maintain close contact, reducing gaps and energy loss during power transmission and improving the efficiency and stability of torque transmission. Simultaneously, the elastic component 341, sleeved on the outside of the rod body 323, can buffer and reset minor offsets of the push rod 320. When vibration or torque fluctuations occur during equipment operation, the elastic component 341 can absorb vibration energy, preventing the push rod 320 from displacing due to external interference and ensuring the smooth operation of the torque limiter.

[0068] It should be noted that, under the pressure of the elastic component 341, the wedge 342 can convert the elastic force into a clamping force perpendicular to the surfaces of the protrusion 312 and the end 322. By tightly contacting the side of the protrusion 312 away from the active end flange 100 and the transition surface 324 of the end 322, a stable and uniform pressure distribution is formed, further enhancing the connection stability between the push rod 320 and the mounting base 310. When the system is overloaded, as the torque increases, the force on the push rod 320 gradually exceeds the elastic force applied by the elastic component 341. The push rod 320 overcomes the elastic resistance and pushes the wedge 342 to move, further compressing the elastic component 341. When the push rod 320 moves to a certain extent, the power transmission path is cut off, achieving overload protection. Furthermore, the combined structure of the elastic component 341 and the wedge block 342 allows the pressure of the clamping component 340 to be flexibly adjusted according to the actual working conditions. By replacing the elastic component 341 with different elastic coefficients or adjusting the installation angle of the wedge block 342, the equipment requirements under different power and torque conditions can be met, significantly improving the adaptability and reliability of the torque limiter in complex working environments and effectively protecting the equipment from overload damage.

[0069] In some examples, please refer to Figure 5The elastic component 341 includes an elastic part 3411 and an adjusting part 3412. The elastic part 3411 is sleeved on the outside of the rod 323 and located between the rod 323 and the inner wall of the mounting base body 311. The adjusting part 3412 is pressed against the side of the elastic part 3411 away from the steel ball 330 and is connected to the mounting base body 311. It should be noted that the elastic part 3411 can be a disc spring, which is sleeved between the rod 323 and the inner wall of the mounting base body 311. It generates elastic force through its own deformation to ensure that the wedge block 342 tightly presses against the protrusion 312 and the end 322, thereby achieving stable torque transmission and buffering impact loads. The adjusting part 3412 can be an adjusting nut, which is threadedly connected to the mounting base body 311. By rotating the adjusting nut, the disc spring can be compressed or released to precisely adjust the preload and adapt to different working conditions. This structural design combines compactness and practicality. On the one hand, the compact structure of the disc spring facilitates the miniaturization of the torque limiter; on the other hand, the adjusting nut allows for preload adjustment without disassembling components, simplifying maintenance. Furthermore, the long fatigue life of the disc spring ensures the long-term stable operation of the elastic component 341, reducing preload drift and improving the reliability of the torque limiter.

[0070] In some embodiments, please refer to Figure 5 The clamping assembly 340 includes a dial 343, which is connected to the end of the elastic component 341 opposite to the wedge block 342, and a portion of the dial 343 is exposed outside the mounting base body 311. It should be noted that the dial 343 is typically made of high-strength and wear-resistant metal or engineering plastic, with clear graduations corresponding to different preload values. Operators can visually obtain the current preload status of the elastic component 341 by observing the dial 343. During equipment commissioning, technicians can adjust the preload of the elastic component 341 to a suitable value by adjusting the nut, referring to the graduations on the dial 343, based on actual working conditions. During equipment operation, if the reading on the dial 343 shows abnormal changes, the change in preload can be detected promptly, allowing for assessment of the clamping assembly 340's operating status. This facilitates rapid maintenance, prevents torque limiter failure due to abnormal preload, and effectively improves the safety and reliability of equipment operation.

[0071] In some embodiments, please refer to Figure 5A pre-reserved cavity 350 is provided between the wedge 342 and the mounting body 311. This structural design provides a more reliable guarantee for the overload protection function of the torque limiter. During normal operation, the wedge 342 is tightly pressed against the protrusion 312 and the end 322 under the pressure of the elastic component 341, ensuring stable torque transmission. At this time, the pre-reserved cavity 350 is in an unfilled state. When the system encounters an overload, the steel ball 330 is lifted, and the force on the push rod 320 exceeds the elastic force threshold set by the elastic component 341 and begins to move. Consequently, the end 322 of the push rod 320 will squeeze the wedge 342 and displace it towards the pre-reserved cavity 350. As the push rod 320 continues to advance, the wedge 342 gradually fills the reserved cavity 350. During this process, the wedge 342 disengages from its end 322 and fully engages with the protrusion 312. This positional change not only breaks the stable contact between the steel ball 330 and the tapered hole 110 of the active end flange 100 and the slot 321 of the push rod 320, instantly cutting off the power transmission path, but more importantly, the action of the wedge 342 filling the reserved cavity 350 can quickly relieve the pressure applied by the elastic component 341 to the end 322 of the push rod 320. This allows the push rod 320 to move more smoothly after losing its elastic restraint, further accelerating the steel ball 330's disengagement from its original position and achieving a rapid response to overload. At the same time, the reserved cavity 350 provides guiding and restraining space for the movement of the wedge 342, preventing it from swaying or shifting under force, ensuring stable and reliable overload protection action, and effectively improving the safety protection performance of the torque limiter under complex working conditions.

[0072] In some embodiments, please refer to Figure 5The clamping assembly 340 also includes a pressure plate 344, which is positioned between the elastic component 341 and the wedge 342, and is movably connected to the rod 323. It should be noted that, from a positional perspective, the pressure plate 344 acts as a bridge between the elastic component 341 and the wedge 342. Under normal operating conditions, the elastic force generated by the elastic component 341 does not directly act on the wedge 342, but is first received and distributed through the pressure plate 344. This transitional force transmission method avoids excessive local pressure on the wedge 342, preventing deformation or damage caused by stress concentration, and effectively extending the service life of the wedge 342. The movable connection design between the pressure plate 344 and the rod 323 allows the pressure plate 344 to flexibly adjust its position and angle during torque transmission. This ensures that the elastic force is always evenly applied to the wedge 342 along the axial direction of the rod 323, maintaining tight fit between all components of the ejector device 300 and guaranteeing efficient and stable torque transmission. When the system encounters an overload, the end 322 of the ejector rod 320 presses the wedge 342 towards the pre-reserved cavity 350, with the pressure plate 344 moving synchronously. During this critical process, the pressure plate 344 acts as a buffer, preventing the wedge 342 from experiencing severe impact due to excessive instantaneous force, allowing it to fill the pre-reserved cavity 350 more smoothly and quickly cut off the power transmission path, achieving reliable overload protection. Simultaneously, the presence of the pressure plate 344 enhances the overall structural strength and rigidity of the clamping assembly 340, working in conjunction with the pre-reserved cavity 350 and the mounting base body 311 to provide a stable constraint on the wedge 342, improving its movement controllability. In addition, during equipment maintenance, the pressure plate 344 makes the installation and disassembly of the elastic component 341 and the wedge 342 more convenient. Technicians only need to disassemble the pressure plate 344 to quickly inspect and replace the elastic component 341 and the wedge 342, which greatly improves the efficiency and maintainability of equipment maintenance.

[0073] In some embodiments, please refer to Figure 5The pressure plate 344 includes a first surface 3441 and a second surface 3442 arranged opposite to each other. The first surface 3441 is connected to the elastic component 341, receiving and transmitting the elastic force generated by the elastic component 341. The second surface 3442 is connected to the wedge block 342, effectively applying the elastic force to the wedge block 342 to ensure the stability of torque transmission under normal working conditions. The side of the second surface 3442 away from the mounting base body 311 is retracted towards the first surface 3441. It should be noted that when the system encounters an overload and the wedge block 342 is squeezed to fill the reserved cavity 350, this retracted surface serves as a guide surface for the wedge block 342. Based on the principle of inclined planes, the wedge block 342 can gradually lift the pressure plate 344 along the retracted inclined plane. During this process, the pressure plate 344 is no longer a passive force-bearing component, but works closely with the wedge block 342. Through its own displacement, it cleverly coordinates the force relationship between the elastic component 341, the wedge block 342 and the push rod 320, making the cutting process of the power transmission path smoother and more efficient, and greatly improving the response speed and protection reliability of the torque limiter when dealing with overload.

[0074] This disclosure exemplarily describes the operation of a torque limiter:

[0075] Under normal operating conditions, power is input from the driving flange 100, and the driving flange 100 transmits torque stably to the driven flange 200 through the ejector pin device 300. At this time, the steel ball 330 in the ejector pin device 300 is tightly fitted into the receiving space 500 formed by the tapered hole 110 of the driving flange 100 and the slot 321 of the ejector pin 320, becoming the medium for torque transmission. The clamping assembly 340 plays an important role. The butterfly spring in the elastic assembly 341 is sleeved between the rod body 323 and the inner wall of the mounting base body 311. It generates elastic force through its own deformation. This elastic force is received by the first surface 3441 of the pressure plate 344 and then evenly transmitted to the second surface 3442, which in turn acts on the wedge block 342, so that the wedge block 342 is tightly pressed against the protrusion 312 and the end 322. This ensures that the push rod 320, the steel ball 330 and the active end flange 100 maintain close contact, and stably transmits the torque from the active end flange 100 through the steel ball 330 and the push rod 320 to the driven end flange 200, realizing the effective transmission of power.

[0076] When the system is overloaded and the transmitted torque exceeds the set threshold, the compressive force on the steel ball 330 increases, and the force on the push rod 320 exceeds the elastic force applied by the elastic component 341. The push rod 320 overcomes the elastic resistance and begins to move radially along the driven end flange 200, pushing the wedge block 342 towards the reserved cavity 350. Since the second surface 3442 of the pressure plate 344 is set to contract towards the first surface 3441 from the side away from the mounting body 311, the wedge block 342 can gradually push up the pressure plate 344 along this contracted slope during the movement. The pressure plate 344 moves synchronously with the movement of the wedge block 342, coordinating the force relationship between the elastic component 341, the wedge block 342, and the push rod 320. As the push rod 320 moves further, the wedge 342 gradually fills the reserved cavity 350. At this time, the wedge 342 is no longer pressed on the end 322, but is completely pressed on the protrusion 312. This action completely changes the contact state between the steel ball 330 and the tapered hole 110 of the active end flange 100 and the slot 321 of the push rod 320, and the power transmission path is quickly cut off.

[0077] After the power transmission path is cut off, the intermediate slewing bearing 410 and the transition plate 420 of the transmission connection 400 play a crucial role. The intermediate slewing bearing 410, with its rolling elements' flexible rolling characteristics within the raceway, continuously provides stable slewing support for the driving flange 100. Even if the driving flange 100 loses torque transmission with the driven flange 200, it can maintain its rotational stability, avoiding violent shaking due to inertia or unbalanced forces. The transition plate 420 firmly connects the driving flange 100 and the driven flange 200. After the two flanges lose their torque transmission connection, it still serves as a reliable structural support, ensuring the relative position of the two remains stable and preventing flange misalignment or component damage due to external forces. This provides strong protection for the system stability of the entire torque limiter after overload.

[0078] In some examples, this torque limiter may include a torque limiter body, an automatic reset device, a manual separation device, a torque limiter status monitoring and signaling system, and installation and measurement auxiliary tools. The torque limiter body consists of an active end flange 100, a driven end flange 200, and multiple ejector pin devices 300, providing basic torque transmission and overload protection functions. The automatic reset device works in conjunction with the elastic component 341 in the ejector pin device 300; when the overload is released, the elastic force returns the ejector pin device 300 to its initial position. The manual separation device allows manual operation to separate the ejector pin device 300 from the active end flange 100, used for emergency shutdowns or equipment maintenance under special operating conditions. The status monitoring and signaling system uses sensors installed on the dial 343 or key locations to monitor parameters such as the position of the ejector pin device 300 and changes in the prestress of the elastic component 341 in real time, and outputs an overload alarm signal. The installation and measurement auxiliary tools include measuring instruments for measuring installation dimensions, adjusting shims 140, etc., to ensure the installation accuracy of each component.

[0079] In some examples, the torque limiter torque value is set by adjusting the prestress of the disc springs of dozens of ejector pin devices 300. The adjustment force can be read from the dial 343 on the ejector pin cylinder. When the set torque of the torque limiter varies within a small range (meaning it does not exceed the range that a pair of torque limiters can adjust), it can be achieved by adjusting the prestress of the ejector pins in the circumferential direction. When the set torque needs to vary within a large range (meaning it exceeds the range that a pair of torque limiters can adjust), in addition to adjusting the prestress, the required set torque needs to be obtained by symmetrically reducing the number of ejector pins (e.g., removing ejector pin devices 300 at even-numbered positions at intervals) to ensure that the force distribution remains balanced.

[0080] In some examples, after the driving and driven flanges 200 are installed in place via the intermediate bearing, an installation measurement tool is used to check the distance from the contact surface between the driven flange 200 and the ejector pin device 300 to the bottom of the mounting groove 121 of the driving flange 100. Based on the measured distance, a shim 140 of appropriate thickness is selected from the tool kit to ensure accurate installation clearance. Then, the mounting block 130 and shim 140 are inserted into the mounting groove 121 of the driving flange 100, and the mounting screws are tightened. After installing the mounting block 130, the ejector pin device 300 is inserted into the driven flange 200, and the mounting bolts 600 are tightened. Through precise dimensional fit and installation techniques, the stable operation of the torque limiter is ensured.

[0081] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0082] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0083] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A torque limiter, characterized in that, include: The active end flange (100) is configured to connect to the output end of the motor; Driven flange (200) is connected to driving flange (100), and driven flange (200) is configured to be connected to coupling; Multiple ejector pin devices (300) are arranged circumferentially around the driven end flange (200) and connected to the driven end flange (200); the multiple ejector pin devices (300) are arranged symmetrically in pairs relative to the central axis of the driven end flange (200); the ejector pin devices (300) are movably connected to the driving end flange (100).

2. The torque limiter according to claim 1, characterized in that, It also includes a transmission connection part (400), which is connected to the driving end flange (100) and the driven end flange (200) respectively.

3. The torque limiter according to claim 2, characterized in that, The transmission connection part (400) includes an intermediate rotary bearing (410) and an adapter plate (420). The intermediate rotary bearing (410) is installed at the end of the driving end flange (100) near the motor. The intermediate rotary bearing (410) is connected to the driven end flange (200) through the adapter plate (420).

4. The torque limiter according to claim 2, characterized in that, The active end flange (100) has a tapered bore (110); The ejector pin device (300) includes: The mounting base (310) is partially embedded in the driven end flange (200) and connected to the driven end flange (200); A push rod (320) is inserted into the mounting base (310) and movably connected to the mounting base (310). A slot (321) is provided at one end of the push rod (320) facing the tapered hole (110). The tapered hole (110) and the slot (321) form an accommodating space (500). A steel ball (330) is housed within the accommodating space (500), and the steel ball (330) is capable of lifting the push rod (320).

5. The torque limiter according to claim 4, characterized in that, The active end flange (100) includes a flange body (120) and a mounting block (130) connected to each other. The flange body (120) has a mounting groove (121) for accommodating the mounting block (130), and the tapered hole (110) is formed on the mounting block (130).

6. The torque limiter according to claim 5, characterized in that, The active end flange (100) also includes a gasket (140), which is disposed between the bottom of the mounting groove (121) and the mounting block (130).

7. The torque limiter according to claim 4, characterized in that, The mounting base (310) includes a mounting base body (311) and a protrusion (312) connected to each other, and the push rod (320) is embedded in the protrusion (312); The top rod (320) includes a connected end (322) and a rod body (323), the slot (321) is formed on the end (322), and the end (322) is embedded in the protrusion (312); The ejector device (300) further includes a clamping assembly (340) connected to the mounting base body (311), with a portion of the clamping assembly (340) located between the inner wall of the mounting base body (311) and the rod (323); When torque is transmitted between the active end flange (100) and the driven end flange (200), the end of the clamping assembly (340) facing the steel ball (330) is pressed against the protrusion (312) and the end (322).

8. The torque limiter according to claim 7, characterized in that, The clamping assembly (340) includes: An elastic component (341) is connected to the mounting base body (311). The elastic component (341) is partially sleeved outside the rod (323) and located between the rod (323) and the mounting base body (311). A wedge (342) is disposed on the side of the elastic component (341) near the steel ball (330) and pressed against the protrusion (312) and the end (322).

9. The torque limiter according to claim 8, characterized in that, The clamping assembly (340) includes a dial (343) connected to one end of the elastic assembly (341) away from the wedge (342), and a portion of the dial (343) is located outside the mounting body (311).

10. The torque limiter according to claim 8, characterized in that, There is a reserved cavity (350) between the wedge (342) and the mounting base body (311); When the steel ball (330) is lifted, the wedge (342) moves to fill the reserved cavity (350) and presses against the protrusion (312).

11. The torque limiter according to claim 10, characterized in that, The clamping assembly (340) further includes a pressure plate (344), which is disposed between the elastic assembly (341) and the wedge (342), and the pressure plate (344) is movably connected to the rod (323).

12. The torque limiter according to claim 11, characterized in that, The pressure plate (344) includes a first surface (3441) and a second surface (3442) disposed opposite to each other. The first surface (3441) is connected to the elastic component (341), and the second surface (3442) is connected to the wedge (342). The side of the second surface (3442) away from the mounting base body (311) is retracted towards the first surface (3441).

Images