A torque limiter

Abstract

The utility model discloses a kind of torque limiters, including driving disc, window, sunken platform and positioning hole are equipped with interval thereon, driving disc is connected with flywheel by bolt;Disc spring, it is connected in driving disc, disc spring top portion and driving disc inner top portion abut;Pressurized disc, abut at disc spring bottom portion, pressurized disc outside has multiple protrusions, multiple protrusions are all equipped with tooth, tooth and window are adapted;Boss, between two adjacent protrusions, boss and positioning hole are adapted, to the radial positioning of pressurized disc;Driven disc, it is connected at pressurized disc bottom portion, the top portion of driven disc is equipped with limit plate, the both ends of limit plate have nub, sunken platform and limit plate are movably connected.The torque limiter is installed on flywheel, when torque overload disc spring deformation cannot offset overload torque, using the cooperation of driving disc, pressurized disc, driven disc and disc spring, so that the rotational speed of driving disc, disc spring, pressurized disc and flywheel is consistent, the rotational speed of driven disc is inconsistent with it, to realize the effect of torque limit.

Description

Technical Field

[0001] This utility model belongs to the field of clutch technology, specifically relating to a torque limiter. Background Technology

[0002] During the operation of a vehicle's power transmission system, the engine, as the core power source, typically exhibits periodic torque fluctuations. These fluctuating torques, as they are transmitted to various components of the power transmission system, can cause system vibrations and impacts. This not only generates noticeable noise and inter-component collisions but also directly reduces driving comfort and negatively impacts the driving experience. To effectively mitigate the adverse effects of torque fluctuations, improve driving comfort, and ensure the stable operation of the power transmission system, incorporating torque fluctuation absorption mechanisms into the vehicle's drivetrain has become an essential industry practice.

[0003] However, existing torque fluctuation control solutions still have many defects and shortcomings. Among them, the most common method is to fix the torsional damper directly to the flywheel of the engine crankshaft. This type of structure can only absorb part of the torque fluctuation to suppress vibration by relying on the deformation of the elastic element, but it does not have the function of torque overload limiting. When the torque exceeds the safety threshold, it cannot effectively protect the subsequent components of the transmission system. Under sudden overload conditions, it is very easy to damage key components such as gearbox and drive shaft.

[0004] Another type of solution uses a torque limiter, but it has obvious shortcomings in structural design and assembly process. The main reason is that the flywheel and torque limiter are usually riveted together, and the torque limiter itself has a large number of parts, which not only significantly increases the weight of the assembly, but also increases the assembly difficulty and precision requirements of the riveted integrated structure, ultimately resulting in high production and manufacturing costs and restricting large-scale promotion and application. Utility Model Content

[0005] The purpose of this utility model is to provide a torque limiter. On the one hand, it addresses the technical defects of existing technologies that directly fix the torsional vibration damper to the flywheel of the engine crankshaft. This method can only absorb part of the torque fluctuations and suppress vibration by relying on the deformation of the elastic element, but it does not have a torque overload limiting function. When the torque exceeds the safety threshold, it cannot effectively protect the subsequent components of the transmission system, and under sudden overload conditions, it is very easy to cause damage to key components such as the gearbox and drive shaft. On the other hand, it addresses the technical defects of riveting the flywheel and the torque limiter into one unit. This not only significantly increases the weight of the assembly, but also increases the assembly difficulty and precision requirements of the riveted integrated structure, ultimately resulting in high production and manufacturing costs and restricting large-scale promotion and application.

[0006] The technical solution adopted in this utility model is as follows: A torque limiter, comprising: The drive plate is provided with windows, a countersunk platform and positioning holes at intervals, and the drive plate is connected to the flywheel by bolts; A disc spring is connected to the drive disc, and the top of the disc spring abuts against the top of the drive disc. A pressure plate abuts against the bottom of a disc spring. The outer side of the pressure plate has multiple protrusions, and each of the multiple protrusions is provided with teeth, which are adapted to the window. A boss is provided between two adjacent protrusions, and the boss is adapted to the positioning hole to radially position the pressure plate; The driven plate is connected to the bottom of the pressure plate. The top of the driven plate is provided with a limiting plate. The two ends of the limiting plate have protrusions. The sinking platform is movably connected to the limiting plate.

[0007] Furthermore, the windows and positioning holes are both located at the edge of the drive disk, and multiple windows are arranged circumferentially along the axis of the drive disk, with a positioning hole between two adjacent windows. Multiple protrusions are arranged along the circumference of the pressure plate axis, and a tooth is provided on the same side of each of the multiple protrusions. A boss is provided between two adjacent protrusions. When the pressure plate is installed in the drive plate, the teeth are inserted into the window to circumferentially position the pressure plate and transmit torque, and the boss abuts against the positioning hole to radially position the pressure plate.

[0008] Furthermore, the positioning hole has a rectangular structure and is recessed into the drive disk on the side facing the axis of the drive disk. The protrusion has a trapezoidal structure, with its shorter end abutting against the recess.

[0009] Furthermore, the positioning hole is axially perpendicular to the window.

[0010] Furthermore, the top of the protrusion is flush with the top of the pressure plate, and the bottom of the protrusion is flush with the bottom of the pressure plate.

[0011] Furthermore, the settling platform is disposed on the inner hole of the active disk, and multiple sets are arranged circumferentially along the axial direction of the active disk; Multiple limiting plates are also circumferentially arranged along the axis of the driven disc; When the driven plate is inserted into the bottom of the pressure plate, the top of the limiting plate abuts against the top of the sinking platform.

[0012] Furthermore, both the sinking platform and the limiting plate have bent portions; When the two bent portions abut, the bent portion of the limiting plate is located above the bent portion of the sinking platform, so that the bent portion of the sinking platform is located between the two protrusions.

[0013] Furthermore, the limiting plate is provided with riveting holes; The driven plate is provided with a main vibration damping cover plate on the top, which is located below the limiting plate. The riveting hole is connected to the main vibration damping cover plate by rivets.

[0014] Furthermore, the limiting plates are arranged circumferentially along the driven disc axis, and each limiting plate has a corresponding main vibration damping cover plate at its bottom.

[0015] Furthermore, it also includes a main vibration damper and a pre-vibration damper, which are disposed on the driven disk.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The torque limiter is installed on the flywheel. When the torque overload cannot be offset by the deformation of the disc spring, the torque limiting mechanism formed by the cooperation of the driving disc, pressure plate, driven disc, and disc spring ensures that the rotation speed of the driving disc, disc spring, pressure plate, and flywheel is consistent, while the rotation speed of the driven disc is inconsistent with that of the flying wheel. This achieves the torque limiting effect and provides effective protection for subsequent components of the transmission system. Secondly, the driving disc and flywheel are connected by bolts, which simplifies the assembly difficulty and precision requirements, effectively reduces the production and manufacturing costs, and can be widely promoted and applied. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall structure of a torque limiter provided by this utility model; Figure 2 A schematic diagram of the torque limiter and flywheel assembly provided by this utility model; Figure 3 An exploded view of a torque limiter provided by this utility model; Figure 4 A schematic diagram of the driven disc structure in a torque limiter provided by this utility model; In the diagram: 1. Drive plate; 11. Window; 12. Recessed platform; 2. Disc spring; 3. Pressure plate; 31. Gear; 32. Boss; 4. Driven plate; 41. Main damping cover plate; 42. Main damping; 43. Pre-damping; 5. Limiting plate; 51. Protrusion; 6. Flywheel. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] To address the technical deficiencies mentioned in the background section, the present invention will be further described in detail below with reference to the accompanying drawings: like Figures 1-4 As shown, a torque limiter includes an active disc 1, with a window 11, a countersunk platform 12, and a positioning hole spaced apart on the top of the active disc 1; multiple round holes are provided at the edge of the active disc 1, and the active disc 1 is connected to a flywheel 6 by bolts and the round holes; a disc spring 2 is connected in the active disc 1, and the top of the disc spring 2 abuts against the inner top of the active disc 1; a pressure plate 3 abuts against the bottom of the disc spring 2, and the outer side of the pressure plate 3 has multiple protrusions, each of which is provided with teeth 31, which are adapted to the window 11; a boss 32 is provided between two adjacent protrusions, and the boss 32 is adapted to the positioning hole to radially position the pressure plate 3; The driven plate 4 is connected to the bottom of the pressure plate 3. The top of the driven plate 4 is provided with a limiting plate 5. The two ends of the limiting plate 5 have protrusions 51. The sink plate 12 is movably connected to the limiting plate 5.

[0023] In the above structure, disc spring 2, pressure plate 3, and driven plate 4 are coaxially mounted with driving plate 1 in sequence. When the torque limiter is installed on flywheel 6 and applied, when the torque overload causes disc spring 2 to deform and fail to offset the overload torque, the torque limiting mechanism formed by the cooperation of driving plate 1, pressure plate 3, driven plate 4, and disc spring 2 ensures that the rotational speeds of driving plate 1, disc spring 2, pressure plate 3, and flywheel 6 remain consistent, while the rotational speed of driven plate 4 is inconsistent with it, thereby achieving the effect of torque limiting and effectively protecting subsequent components of the transmission system. Secondly, the connection between driving plate 1 and flywheel 6 via bolts simplifies assembly difficulty and precision requirements, effectively reduces manufacturing costs, and allows for large-scale application.

[0024] Furthermore, windows 11 and positioning holes are both located at the edge of the drive disc 1, and multiple windows 11 are arranged circumferentially along the axis of the drive disc 1. A positioning hole is provided between two adjacent windows 11. Multiple protrusions are arranged circumferentially along the axis of the pressure plate 3. A tooth 31 is provided on the same side of each protrusion. A boss 32 is provided between two adjacent protrusions. When the pressure plate 3 is installed in the drive disc 1, the tooth 31 is inserted into the window 11 to circumferentially position the pressure plate 3 and transmit torque, while the boss 32 abuts against the positioning hole to radially position the pressure plate 3.

[0025] In the above structure, the stability of torque transmission is ensured through dual positioning in both the circumferential and radial directions, avoiding additional vibration or component wear caused by positioning failure. Specifically, in terms of circumferential positioning, multiple windows 11 are arranged along the circumference of the active disk edge 1, and the pressure plate 3 is correspondingly provided with toothed protrusions 31. The precise fit between the teeth 31 and the windows 11 ensures no relative sliding during torque transmission, guaranteeing power transmission efficiency. In terms of radial positioning, the positioning holes between adjacent windows 11 correspond one-to-one with the bosses 32 between adjacent protrusions of the pressure plate 3, limiting the radial displacement of the pressure plate 3 and preventing structural displacement caused by centrifugal force during high-speed operation. Simultaneously, the limiting plate 5 at the top of the driven disk 4 is movably connected to the countersunk platform 12 of the active disk 1, further constraining the axial displacement of the driven disk 4. This ensures that the entire torque limiter maintains a stable fit during torque transmission and fluctuation absorption, improving long-term operational reliability.

[0026] Specifically, such as Figure 3 As shown, the positioning hole has a rectangular structure and is recessed into the drive disk 1 on the side facing the axis of the drive disk 1. The boss 32 has a trapezoidal structure, with its shorter end abutting against the recess. The mating surface of the trapezoidal boss 32 and the recess forms a wedge-shaped constraint, which can resist radial displacement more efficiently than planar contact. Especially when operating at high speed or with torque fluctuations, it can prevent the pressure plate 3 from radially moving due to centrifugal force or impact, thus improving positioning stability.

[0027] In this embodiment, the positioning hole and the window 11 are axially perpendicular, the top of the protrusion is flush with the top of the pressure plate 3, and the bottom of the protrusion is flush with the bottom of the pressure plate 3.

[0028] like Figure 1 and Figure 3 As shown, the sinking platform 12 is located on the inner hole of the driving plate 1, and multiple sinking platforms 1 are arranged circumferentially along the axial direction of the driving plate 1. Multiple limiting plates 5 are also arranged circumferentially along the axial direction of the driven plate 4. When the driven plate 4 is inserted into the bottom of the pressure plate 3, the top of the limiting plate 5 abuts against the top of the sinking platform 12.

[0029] Since both the sinking platform 12 and the limiting plate 5 have bent portions, when the two bent portions abut, the bent portion of the limiting plate 5 is located above the bent portion of the sinking platform 12, so that the bent portion of the sinking platform 12 is located between the two protrusions 51.

[0030] Multiple countersunk platforms 12 are located within the inner hole of the drive disc 1 and are arranged along the axial circumference. Multiple limit plates 5 are correspondingly arranged along the axial circumference of the driven disc 4, forming a multi-point uniform constraint axial positioning system, which improves the reliability of axial limiting. The bent structure has stronger resistance to deformation than the planar contact and can effectively resist the axial impact force generated by torque fluctuation or overload, avoiding axial movement between the driven disc 4 and the pressure plate 3 and the drive disc 1, and reducing component impact and noise. In addition, the layout of the bent part of the countersunk platform 12 between two protrusions 51 forms a nested limiting. The protrusions 51 can form a lateral constraint on the bent part of the countersunk platform 12, further limiting the relative circumferential displacement between the drive disc 1 and the driven disc 4, helping to improve the stability of circumferential force transmission and avoiding slippage during force transmission.

[0031] In this embodiment, as Figure 1 As shown, the limiting plate 5 has riveting holes, and the driven plate 4 has a main vibration damping cover plate 41 on top. The main vibration damping cover plate 41 is located below the limiting plate 5. The riveting holes and the main vibration damping cover plate 41 are connected by rivets. The riveting connection has high reliability and can form a strong rigid connection, avoiding relative loosening between the limiting plate 5 and the main vibration damping cover plate 41 during torque transmission and vibration impact, ensuring the stability of axial positioning and circumferential force transmission. At the same time, the riveting connection technology is mature and easy to operate, and it is suitable for mass production needs.

[0032] like Figure 3 and Figure 4 As shown, the limiting plate 5 is arranged circumferentially along the driven plate 4, and each limiting plate 5 has a corresponding main vibration damping cover plate 41 at its bottom; the driven plate 4 is also provided with main vibration damping 42 and pre-vibration damping 43.

[0033] After the torque limiter is connected to the flywheel 6 with bolts, the engine drives the flywheel 6 to rotate, and the flywheel 6 drives the driving disc 1, disc spring 2, pressure plate 3, driven disc 4 and limit plate 5 to rotate synchronously. During the rotation, since the driven disc 4 is equipped with splines and is connected to the gearbox through the splines, the torque can be transmitted to the gearbox. Furthermore, when the torque is overloaded and the deformation of the disc spring 2 cannot offset the overload torque, the torque limiting mechanism formed by the cooperation of the driving disc 1, pressure plate 3, driven disc 4 and disc spring 2 ensures that the rotation speed of the driving disc 1, disc spring 2, pressure plate 3 and flywheel 6 is consistent, while the rotation speed of the driven disc 4 is different from that of the driving disc 6, thereby achieving the effect of torque limiting and thus providing effective protection for the subsequent components of the transmission system.

[0034] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A torque limiter, characterized in that, include: The drive plate is provided with windows, a countersunk platform and positioning holes at intervals, and the drive plate is connected to the flywheel by bolts; A disc spring is connected to the drive disc, and the top of the disc spring abuts against the top of the drive disc. A pressure plate abuts against the bottom of a disc spring. The outer side of the pressure plate has multiple protrusions, and each of the multiple protrusions is provided with teeth, which are adapted to the window. A boss is provided between two adjacent protrusions, and the boss is adapted to the positioning hole to radially position the pressure plate; The driven plate is connected to the bottom of the pressure plate. The top of the driven plate is provided with a limiting plate. The two ends of the limiting plate have protrusions. The sinking platform is movably connected to the limiting plate.

2. The torque limiter according to claim 1, characterized in that, The windows and positioning holes are both located at the edge of the drive disk, and multiple windows are arranged circumferentially along the axis of the drive disk. A positioning hole is provided between two adjacent windows. Multiple protrusions are arranged along the circumference of the pressure plate axis, and a tooth is provided on the same side of each of the multiple protrusions. A boss is provided between two adjacent protrusions. When the pressure plate is installed in the drive plate, the teeth are inserted into the window to circumferentially position the pressure plate and transmit torque, and the boss abuts against the positioning hole to radially position the pressure plate.

3. A torque limiter according to claim 2, characterized in that, The positioning hole has a rectangular structure and is recessed into the drive disk on the side facing the axis of the drive disk. The protrusion has a trapezoidal structure, with its shorter end abutting against the recess.

4. A torque limiter according to claim 2, characterized in that, The positioning hole is perpendicular to the window in terms of axis.

5. A torque limiter according to claim 2, characterized in that, The top of the protrusion is flush with the top of the pressure plate, and the bottom of the protrusion is flush with the bottom of the pressure plate.

6. A torque limiter according to claim 1, characterized in that, The sinking platform is located on the inner hole of the active disk, and multiple sinking platforms are arranged circumferentially along the axis of the active disk. Multiple limiting plates are also circumferentially arranged along the axis of the driven disc; When the driven plate is inserted into the bottom of the pressure plate, the top of the limiting plate abuts against the top of the sinking platform.

7. A torque limiter according to claim 1, characterized in that, Both the sinking platform and the limiting plate have bent portions; When the two bent portions abut, the bent portion of the limiting plate is located above the bent portion of the sinking platform, so that the bent portion of the sinking platform is located between the two protrusions.

8. A torque limiter according to claim 1, characterized in that, The limiting plate is provided with riveting holes; The driven plate is provided with a main vibration damping cover plate on the top, which is located below the limiting plate. The riveting hole is connected to the main vibration damping cover plate by rivets.

9. A torque limiter according to claim 8, characterized in that, The limiting plates are arranged circumferentially along the driven disc axis, and each limiting plate has a corresponding main vibration damping cover plate at its bottom.

10. A torque limiter according to claim 1, characterized in that, It also includes main vibration damping and pre-vibration damping, which are disposed on the driven disk.

Images