Integrated torque limiter

Abstract

The utility model belongs to the technical field of transmission, and particularly relates to an integrated torque limiter which comprises an inertia ring and an output disc which are coaxially arranged, and a rolling supporting assembly used for limiting radial deviation of the output disc along the inertia ring is arranged between the outer circumferential wall of the output disc and the inner circumferential wall of the inertia ring. When the torque transmitted by the torque limiter exceeds the preset torque, the driven end and the driving end are subjected to sliding friction, that is, the inertia ring and the output disc can relatively slide, and the rolling supporting assembly can limit the output disc in the radial direction, so that the output disc cannot deviate in the radial direction relative to the inertia ring, and the eccentric prevention effect is achieved; meanwhile, rolling friction is formed between the outer peripheral wall of the output disc and the inertia ring through the rolling supporting assembly, and due to the fact that the rolling friction coefficient is far smaller than the sliding friction coefficient, when the output disc slides relative to the inertia ring, the friction force between the outer peripheral wall of the output disc and the inner peripheral wall of the inertia ring is very small; interference between the output disc and the inertia ring can be ignored.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology, and in particular to an integrated torque limiter. Background Technology

[0002] A torque limiter is a mechanical protection device primarily used in mechanical equipment to limit torque transmission and prevent damage from overload. Torque limiters are widely used in new energy hybrid transmissions or range extenders, effectively protecting the drivetrain and generator itself, ensuring safe and stable vehicle operation.

[0003] Especially in friction plate torque limiters, the torque limiter includes an active end, a driven end, and a friction plate assembly. The active end includes an inertia ring and a flexible disc, while the driven end includes an output disc. The active end is connected to the output disc via the friction plate assembly. When the torque limiter is working normally, the active end drives the driven end to rotate together through friction, thereby transmitting torque. When the torque transmitted by the torque limiter exceeds the preset torque, the driven end and the active end slip, that is, relative sliding occurs between the output disc and the inertia ring, thus achieving overload protection.

[0004] If the radial clearance between the inertia ring and the output disc is too small, when the output disc and the inertia ring slide relative to each other, the output disc may move eccentrically and press against the inner circumferential wall of the inertia ring, causing sliding friction between the outer circumferential wall of the output disc and the inner circumferential wall of the inertia ring. This sliding friction will affect the torque accuracy of the torque limiter. Therefore, related technologies design a larger clearance between the outer circumferential wall of the output disc and the inner circumferential wall of the inertia ring to prevent interference between them due to circumferential sliding friction. However, a larger clearance can cause eccentricity when the output disc slides relative to the inertia ring, resulting in abnormal NVH (Noise, Vibration, and Harshness) noises in the vehicle. Utility Model Content

[0005] To improve the eccentricity problem of torque limiters, this invention provides an integrated torque limiter.

[0006] An integrated torque limiter according to an embodiment of the present invention includes a concentrically arranged inertia ring and an output disk. A rolling support assembly for limiting the radial displacement of the output disk along the inertia ring is provided between the outer peripheral wall of the output disk and the inner peripheral wall of the inertia ring.

[0007] In some embodiments, the rolling support includes balls disposed between the output disk and the inertia ring.

[0008] In some embodiments, the rolling support assembly includes at least three rollers arranged in a ring between the output disk and the inertia ring.

[0009] In some embodiments, the rolling support assembly is a bearing, which is sleeved on the outer peripheral wall of the output disk.

[0010] In some embodiments, one end of the inertia ring protrudes inward to form a flange, and the other end of the inertia ring is fixedly connected to a flexible disk. The output disk is disposed between the flange and the flexible disk. A first friction plate is disposed between one side of the output disk and the inertia ring, and a second friction plate, a separation ring, and an elastic element are disposed sequentially between the other side of the output disk and the flexible disk.

[0011] In some embodiments, the bearing is a needle roller bearing without an inner ring, the outer ring of the needle roller bearing without an inner ring is fixedly connected to the inertia ring, and the needle roller ring of the needle roller bearing without an inner ring is disposed on the outer peripheral wall of the output disk.

[0012] The flange has a groove to accommodate one end of the needle roller bearing without an inner ring, and the release ring has a notch to accommodate the other end of the needle roller bearing without an inner ring.

[0013] In some embodiments, a driven end is also included, wherein a damping spring is provided on the output disk.

[0014] In some embodiments, the elastic element is a diaphragm spring.

[0015] In some embodiments, the flexible disk has mounting holes for fixed connection with the engine crankshaft.

[0016] In some embodiments, a driven disc for connecting a drive shaft is provided on the inner ring side of the output disc.

[0017] The integrated torque limiter provided by this utility model, when the torque limiter is working normally, drives the driven end to rotate together through friction, thereby realizing torque transmission. When the torque transmitted by the torque limiter exceeds the preset torque, the driven end and the driven end slip, that is, relative sliding occurs between the output disk and the inertia ring. The rolling support component can limit the output disk radially, so that the output disk cannot deviate radially relative to the inertia ring, thus achieving the effect of anti-eccentricity. At the same time, the rolling support component causes rolling friction between the outer peripheral wall of the output disk and the inertia ring. Since the rolling friction coefficient is much smaller than the sliding friction coefficient, the friction between the outer peripheral wall of the output disk and the inner peripheral wall of the inertia ring is very small when the output disk slides relative to the inertia ring, and the interference between the output disk and the inertia ring can be ignored. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of an integrated torque limiter.

[0019] Figure 2 A schematic cross-sectional view of the integrated torque limiter;

[0020] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is a schematic diagram of the structure of the inertia ring and the separation ring in conjunction.

[0022] In the figure: inertia ring 10; flange 11; groove 12; flexible disk 20; elastic element 21; separation ring 22; notch 23; assembly hole 24; output disk 30; first friction plate 31; second friction plate 32; damping spring 33; rolling support assembly 40; bearing outer ring 41; needle roller 42; driven disk 50; splined hub 51. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They 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, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] like Figure 1 and Figure 2 As shown, this embodiment provides an integrated torque limiter, which includes an active end, a driven end, and a friction assembly.

[0027] The active end of this embodiment includes an inertia ring 10 and a flexible disk 20 arranged coaxially. The inertia ring 10 and the portion of the flexible disk 20 near the outer ring are fixedly connected to achieve synchronous rotation of the flexible disk 20 and the inertia ring 10.

[0028] In this embodiment, the driven end includes an output disk 30, which is positioned between the inertia ring 10 and the flexible disk 20 for transmitting torque. The friction assembly includes a first friction plate 31 and a second friction plate 32, which are respectively positioned on opposite sides of the output disk 30. The first friction plate 31 is positioned between the inertia ring 10 and the output disk 30, while the second friction plate 32 is positioned between the output disk 30 and the flexible disk 20. The friction assembly also includes a separation ring 22 and an elastic element 21 positioned between the second friction plate 32 and the flexible disk 20. The elastic element 21 deforms to generate elastic force. Through the separation ring 22, the elastic element 21 sequentially pushes the second friction plate 32, the output disk 30, and the first friction plate 31 against the inertia ring 10, causing frictional engagement between the driven end and the driving end. By adjusting the elastic force of the elastic element 21, the preset torque of the torque limiter can be adjusted.

[0029] In this embodiment, the torque limiter is positioned between the engine crankshaft and the drive shaft. This torque limiter not only transmits torque but also provides overload protection. The flexible disc 20 has mounting holes 24 through which bolts can be inserted to connect to the engine crankshaft, receiving torque from the engine. The inner ring side of the output disc 30 also features a driven disc 50 with a splined hub 51. A corresponding spline is provided on the drive shaft to pass through the splined hub 50, outputting torque to the drive shaft.

[0030] When the torque limiter is working normally, the driving end and the driven end rotate synchronously under the action of friction so that torque can be transmitted between the inertia ring 10 and the output disk 30. When the torque transmitted by the torque limiter exceeds the preset torque, the output disk 30 slips and rotates relative to the inertia ring 10 so that the torque limiter can play the role of overload protection.

[0031] Due to torque overload, the output disc 30 may experience uneven force during its sliding relative to the inertia ring 10, causing the output disc 30 to shift radially relative to the inertia ring 10. This can lead to an excessive imbalance in the torque limiter and abnormal noise.

[0032] Therefore, the integrated torque limiter of this embodiment also provides a rolling support component 40 between the inertia disk 10 and the output disk 30. Specifically, a rolling support component 40 for limiting the radial displacement of the output disk 30 along the inertia ring 10 is provided between the outer peripheral wall of the output disk 30 and the inner peripheral wall of the inertia ring 10.

[0033] When the torque limiter is working normally, the output disk 30 rotates synchronously with respect to the inertia ring 10. When the torque transmitted by the torque limiter exceeds the preset torque, the output disk 30 and the inertia ring 10 slip at the first friction plate 31 and the second friction plate 32. At this time, the output disk 30 will rotate relative to the inertia ring 10. The rolling support assembly 40 can not only limit the output disk 30 radially to prevent the output disk 30 from shifting radially relative to the inertia ring 10, thus achieving the effect of anti-eccentricity; at the same time, the rolling support assembly 40 causes the outer peripheral wall of the output disk 30 and the inertia ring 10 to form rolling friction through the rolling support assembly. Since the rolling friction coefficient is much smaller than the sliding friction coefficient, when the output disk 30 and the inertia ring 10 slip, the friction between the outer peripheral wall of the output disk 30 and the inner peripheral wall of the inertia ring 10 is very small, and the interference between the output disk 30 and the inertia ring 10 can be ignored.

[0034] In this embodiment, the rolling support assembly 40 is a bearing, which is sleeved on the outer peripheral wall of the output disk 30. In some embodiments, the rolling support assembly 40 may optionally include balls, which are arranged annularly between the inertia ring 10 and the output disk 30. For example, an annular groove is formed on the inner wall of the inertia ring 10, and the balls are placed in the annular groove. The number of balls needs to be set according to actual requirements, and will not be elaborated here.

[0035] In some embodiments, the rolling support assembly 40 may optionally include rollers arranged around the inertia ring 10 and the output disk 30. For example, holes may be made on the inertia ring 10 corresponding to the two ends of the rollers, allowing the two ends of the rollers to rotatably pass through the corresponding holes. The number of rollers is at least three, and the three rollers are evenly distributed around the circumference of the output disk 30, with an included angle of 120° between any two adjacent rollers, to ensure that the output disk 30 slides smoothly relative to the inertia ring 10.

[0036] Of course, the number of rollers can also be set to more, such as 5, 6, 7, 8, etc. This embodiment does not impose a specific limitation. Multiple rollers are evenly distributed around the output disk 30 to provide more stable and balanced support for the output disk 30.

[0037] See details Figure 4 One end of the inertia ring 10 protrudes inward to form a flange 11, and the other end of the inertia ring 10 is fixedly connected to the flexible disk 20. A receiving space is formed between the flange 11 and the flexible disk 20 to facilitate assembly. Specifically, the inertia ring 10 and the flexible disk 20 are preferably connected by bolts. Multiple bolts are arranged circumferentially on the inertia ring 10 and the flexible disk 20 to securely fix the output disk 50 and the flexible disk 20 through multi-point fixing. In some embodiments, the inertia ring 10 and the flexible disk 20 can be connected by conventional methods such as rivets or welding as needed.

[0038] In this embodiment, the first friction plate 31 and the second friction plate 32 are fixedly mounted on the output disk 30, and the first friction plate 31, the output disk 30, and the second friction plate 32 are specifically connected by bolts. In some embodiments, conventional methods such as riveting or welding can also be used to achieve the connection as needed. In this embodiment, the elastic element 21 is preferably a diaphragm spring capable of storing a large elastic force. The elastic element 21 applies pressure to the second friction plate 32, the output disk 30, and the first friction plate 31 in sequence through the separation ring 22, causing the first friction plate 31 to abut against the flange 11.

[0039] See details Figure 3 In this embodiment, the rolling support assembly 40 preferably uses a needle roller bearing without an inner ring. This needle roller bearing without an inner ring includes an outer ring 41 and needle rollers 42. The outer ring 41 is fixedly connected to the inner peripheral wall of the moment ring 10, and the needle rollers 42 are arranged around the outer peripheral side of the first friction plate 31, the output disk 30, and the second friction plate 32. Because the bearing without an inner ring has a simple structure and a small radial thickness, it is easy to assemble between the moment ring 10 and the output disk 30.

[0040] It should be noted that the needle rollers 42 of the needle roller bearing without an inner ring are typically connected to the outer ring of the bearing via a cage (not shown in the figure). Since the structure of the needle roller bearing without an inner ring is existing technology, it will not be described in detail in this embodiment. In some embodiments, the bearing can also be a conventional bearing with an inner ring, in which case the outer ring of the bearing is fixedly abutted against the inner peripheral wall of the moment ring 10, and the inner ring of the bearing is specifically sleeved on the outer peripheral side of the first friction plate 31, the output disk 30, and the second friction plate 32.

[0041] like Figure 4 As shown, in this embodiment, the flange 11 has a groove 12 on the side facing the needle roller bearing without an inner ring, and the separation ring 22 has a notch 23 on the side facing the needle roller bearing without an inner ring. One end of the needle roller bearing without an inner ring extends into the groove 12, and the other end extends into the notch 23, so that the flange 11 and the separation ring 22 can limit the needle roller bearing without an inner ring along the axial direction to ensure that the needle roller bearing without an inner ring is firmly installed.

[0042] The driven end of this embodiment also includes a damping spring 33, which is ringed on the output disk 30 to provide an output function, thereby ensuring that the torque limiter can stably transmit torque. It should be noted that the working principles of the driving end and the driven end in this embodiment are both existing technologies, so the connection structure between the two will not be described in detail in this embodiment.

[0043] When the torque limiter in this embodiment is working normally, the crankshaft of the engine first transmits torque to the flexible disk 20, causing the flexible disk 20 to drive the inertia ring 10, the elastic element 21 and the separation ring 22 to rotate synchronously. The rotating inertia ring 10 and the separation ring 22 then transmit torque to the first friction plate 31, the output disk 30 and the second friction plate 32 between them through friction, so that the output disk 30 rotates synchronously with the inertia ring 10 and the separation ring 22. Finally, the rotating output disk 30 transmits torque to the drive shaft through the driven disk 50.

[0044] When the torque transmitted by the torque limiter exceeds the preset torque, the crankshaft of the engine transmits torque to the flexible disc 20, causing the flexible disc 20 to drive the inertia ring 10, the elastic element 21 and the separation ring 22 to rotate synchronously. The rotating inertia ring 10 slips between itself and the first friction plate 31 and / or between the separation ring 22 and the second friction plate 32 due to insufficient friction, causing relative sliding between the output disc 30 and the inertia ring 10, thereby playing the role of overload protection.

[0045] When the output disk 30 and the inertia ring 10 slip, the rolling support assembly 40 can limit the output disk 30 radially, thereby preventing eccentricity. At the same time, the rolling support assembly 40 causes rolling friction between the outer peripheral wall of the output disk 30 and the inertia ring 10, making the friction between the outer peripheral wall of the output disk 30 and the inner peripheral wall of the inertia ring 10 very small, and the interference between the output disk 30 and the inertia ring 10 negligible.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An integrated torque limiter, comprising a coaxially arranged inertia ring (10) and an output disk (30), characterized in that: A rolling support assembly (40) for limiting the radial displacement of the output disk (30) along the inertia ring (10) is provided between the outer peripheral wall of the output disk (30) and the inner peripheral wall of the inertia ring (10).

2. The integrated torque limiter according to claim 1, characterized in that: The rolling support assembly (40) includes balls disposed between the output disk (30) and the inertia ring (10).

3. The integrated torque limiter according to claim 1, characterized in that: The rolling support assembly (40) includes at least three rollers arranged around the output disk (30) and the inertia ring (10).

4. The integrated torque limiter according to claim 1, characterized in that: The rolling support assembly (40) is a bearing, which is sleeved on the outer peripheral wall of the output disk (30).

5. The integrated torque limiter according to claim 4, characterized in that: One end of the inertia ring (10) protrudes inward to form a flange (11), and the other end of the inertia ring (10) is fixedly connected to the flexible disk (20). The output disk (30) is disposed between the flange (11) and the flexible disk (20). A first friction plate (31) is disposed between one side of the output disk (30) and the inertia ring (10), and a second friction plate (32), a separation ring (22), and an elastic element (21) are disposed sequentially between the other side of the output disk (30) and the flexible disk (20).

6. The integrated torque limiter according to claim 5, characterized in that: The bearing is a needle roller bearing without an inner ring. The outer ring (41) of the needle roller bearing without an inner ring is fixedly connected to the inertia ring (10), and the needle rollers (42) of the needle roller bearing without an inner ring are arranged around the outer peripheral wall of the output disk (30). A groove (12) is provided on the flange (11) to accommodate one end of the needle roller bearing without an inner ring, and a notch (23) is provided on the separation ring (22) to accommodate the other end of the needle roller bearing without an inner ring.

7. The integrated torque limiter according to claim 6, characterized in that: The output disk (30) is provided with a damping spring (33).

8. The integrated torque limiter according to any one of claims 5-7, characterized in that: The elastic element (21) is a diaphragm spring.

9. The integrated torque limiter according to any one of claims 5-7, characterized in that: The flexible disk (20) has an assembly hole (24) for fixed connection with the engine crankshaft.

10. The integrated torque limiter according to any one of claims 5-7, characterized in that: The inner ring side of the output disk (30) is provided with a driven disk (50) for connecting the drive shaft.

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