Torque limiter and vehicle

Abstract

The utility model discloses a torsion limiter and a vehicle, and belongs to the technical field of vehicle torsion damping devices. The torsion limiter comprises a clamping disc, the clamping disc comprises first reinforcing ribs and second reinforcing ribs, the first reinforcing ribs and the second reinforcing ribs are evenly distributed in the circumferential direction of the center line of the clamping disc, the first reinforcing ribs extend in the radial direction of the clamping disc, and the second reinforcing ribs extend in the circumferential direction of the clamping disc. According to the torsion limiting device, the clamping disc is provided with the two groups of reinforcing ribs which extend along the radial direction and the circumferential direction and are uniformly distributed, so that the normal vibration speed of the clamping disc under unit excitation is reduced, and the noise of the torsion limiting device can be reduced under the condition that the excitation of a friction system in the torsion limiting device is not changed; noise generated in the starting process or the idling power generation process of the torque limiter is prevented from being perceived by customers.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle torsion damping devices, in particular to a vehicle and a torque limiter thereof. Background Art

[0002] Torque limiter, also known as torque limiter, torque limiter, safety clutch, is used for overload protection of vehicles and is an important component in automobile clutch. It is mainly composed of elastic elements and damping elements, among which the spring element is used to reduce the torsional stiffness of the first end of the transmission system, thereby reducing a certain order of natural frequency of the torsional system of the transmission system, and then changing the natural vibration mode of the system so that it can avoid the excitation caused by the main harmonic excitation of the engine torque; the damping element is used to effectively dissipate the vibration energy.

[0003] The torque limiter has vibration reduction and torque limiting functions. The vibration reduction function is mainly composed of springs and damping elements, among which the spring is used to reduce the torsional stiffness of the first end of the transmission system so that it can avoid system resonance in the common working range; the damping element is used to effectively dissipate vibration energy. The torque limiting function is composed of a pair of friction plates. When certain faults cause the transmitted torque to exceed the set value (overload), it limits the torque transmission in the form of slipping, thereby protecting the reduction box, and recovers automatically when the overload disappears. During the startup and mileage increase process of the traditional torque limiter, the upper and lower friction pairs of the torque limiter damping plate will have adhesive wear, and the uneven structure on the friction surface will cause normal vibration perpendicular to the friction surface. When the normal vibration speed of the clamping plate exceeds a certain level, the noise generated by the torque limiter will be perceived by the passengers in the car. Utility Model Content

[0004] The technical problem to be solved by the utility model is the problem that the existing torque limiter generates high-frequency howling.

[0005] In view of the above technical problems, the utility model provides the following technical solutions:

[0006] A torque limiter includes a clamping disk, wherein the clamping disk includes a first reinforcing rib and a second reinforcing rib that are evenly arranged circumferentially around a center line thereof, wherein the first reinforcing rib extends radially along the clamping disk, and the second reinforcing rib extends circumferentially along the clamping disk.

[0007] In some embodiments of the present invention, the clamping disk includes a first disk surface and a second disk surface arranged opposite to each other, and the first reinforcing rib and the second reinforcing rib are formed into a rib shape that is convex relative to the first disk surface and concave relative to the second disk surface.

[0008] In some embodiments of the utility model, the first reinforcing rib and the second reinforcing rib are formed by stamping, and an arc-shaped transition is formed between the first reinforcing rib and the adjacent disk surface of the clamping disk, and an arc-shaped transition is formed between the second reinforcing rib and the adjacent disk surface of the clamping disk.

[0009] In some embodiments of the present invention, the first reinforcing rib and the second reinforcing rib are respectively formed as capsule-shaped ribs, and the capsule-shaped ribs include a rectangular segment and semicircular segments located at both ends of the rectangular segment.

[0010] In some embodiments of the present invention, the distance between the center positions of the first reinforcing rib and the second reinforcing rib and the center of the clamping disk is between (1 / 3-1 / 2) of the radius of the clamping disk.

[0011] In some implementation modes of the utility model, the clamping plate is provided with a central hole and four anchor holes evenly arranged around the central hole.

[0012] In some embodiments of the utility model, eight first reinforcing ribs are provided, and the eight first reinforcing ribs are evenly circumferentially surrounding the outside of the center hole; four second reinforcing ribs are provided, and the four second reinforcing ribs are evenly circumferentially surrounding the outside of the center hole.

[0013] In some implementations of the present invention, two first reinforcing ribs and one second reinforcing rib are arranged between two adjacent anchor holes, and the second reinforcing rib is located between the two first reinforcing ribs.

[0014] In some embodiments of the present invention, the torque limiter also includes a first cover body and a second cover body, the clamping plate is fixed on the first cover body, the first cover body, the second cover body and the clamping plate are coaxially arranged and connected to the axle through a disc hub.

[0015] The utility model also provides a vehicle, comprising an engine and the torque limiter connected to the output end of the engine.

[0016] The technical solution of the utility model has the following technical effects compared with the prior art:

[0017] In the torque limiter and vehicle provided by the utility model, two groups of reinforcing ribs extending radially and circumferentially and evenly arranged are arranged on the clamping plate of the torque limiter, so that the normal vibration speed of the clamping plate under unit excitation is reduced. When the excitation of the friction system in the torque limiter remains unchanged, the noise of the torque limiter can be reduced, and the noise generated by the torque limiter during the starting process or idling power generation process is prevented from being perceived by the customer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0019] Figure 1 A structural schematic diagram of a specific implementation of the torque limiter provided by the utility model;

[0020] Figure 2A longitudinal cross-sectional view of a specific implementation of the torque limiter provided by the utility model;

[0021] Figure 3 A structural schematic diagram of a specific implementation of a clamping disk in a torque limiter provided by the utility model;

[0022] Figure 4 This is a comparison diagram of the Y-axis vibration speed of the torque limiter provided by the utility model and three other torque limiters under unit excitation. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 , Figure 2The figure shows a specific embodiment of the torque limiter provided by the utility model, the torque limiter 100 includes a clamping plate 10, the clamping plate 10 includes a first reinforcing rib 11 and a second reinforcing rib 12, the first reinforcing rib 11 extends along the radial direction of the clamping plate 10, and a plurality of the first reinforcing ribs 11 are evenly arranged circumferentially around the center line of the clamping plate 10, the second reinforcing rib 12 extends along the circumferential direction of the clamping plate 10, and a plurality of the second reinforcing ribs 12 are evenly arranged circumferentially around the center line of the clamping plate 10.

[0028] Since the noise level ultimately generated by the torque limiter is positively correlated to the product of the excitation of the friction system in the torque limiter and the normal vibration velocity of the clamping plate, the clamping plate 10 of the torque limiter 100 is provided with two sets of reinforcing ribs extending radially and circumferentially and evenly arranged, so that the normal vibration velocity of the clamping plate 10 under unit excitation is reduced, thereby preventing the noise generated by the torque limiter 100 during the startup process or idling power generation process from being perceived by customers.

[0029] Specifically, Figure 3 As shown, the clamping plate 10 includes a first plate surface 10a and a second plate surface that are relatively arranged. The first reinforcing ribs 11 and the second reinforcing ribs 12 protrude outwardly relative to the first plate surface 10a, and are recessed inwardly relative to the second plate surface. This rib shape can change the natural frequency of the clamping plate 10 without increasing the weight of the clamping plate 10, thereby meeting the design requirements of lightweight vehicles.

[0030] More specifically, the first reinforcing rib 11 and the second reinforcing rib 12 are manufactured by stamping process, which ensures that the thickness of the clamping disc 10 remains unchanged and the weight of the torque limiter 100 remains unchanged. At the same time, the first reinforcing rib 11 and the adjacent surface of the clamping disc 10 have an arc transition, and the second reinforcing rib 12 and the adjacent surface of the clamping disc 10 have an arc transition. Since the arc transition design can disperse the force to the entire curve under pressure, compared with the structure of angle transition, it can increase the strength and durability of the bending part, reduce the risk of cracks in the bending part, and thus increase the service life of the clamping disc 10.

[0031] Specifically, in an optional embodiment, the first reinforcing rib 11 and the second reinforcing rib 12 are respectively formed into capsule-shaped ribs, and the capsule-shaped ribs include a substantially rectangular segment and semicircular segments located at both ends of the rectangular segment. By setting the first reinforcing rib 11 and the second reinforcing rib 12 in a capsule shape, an arc-shaped transition can be achieved between the entire circumference of the first reinforcing rib 11 / the second reinforcing rib 12 and the clamping disk 10.

[0032] Specifically, in an optional embodiment, the distance between the center position of the first reinforcing rib 11 and the second reinforcing rib 12 and the center of the clamping plate 10 is between (1 / 3-1 / 2) of the radius of the clamping plate 10. Figure 3 As shown, the distance L1 between the center of the first reinforcing rib 11 (i.e., the intersection of the center lines of the length direction and the width direction) and the center of the clamping plate 10 is (1 / 3-1 / 2) of the half-value R0 of the clamping plate 10; for example, the radius of the clamping plate 10 is 90mm, and L1 is about 30mm-40mm. Similarly, the distance L2 between the center of the second reinforcing rib 12 (i.e., the intersection of the center lines of the length direction and the width direction) and the center of the clamping plate 10 is (1 / 3-1 / 2) of the half-value R0 of the clamping plate 10.

[0033] Specifically, Figure 3 As shown, the clamping plate 10 is provided with a central hole 13 and four anchor holes 14 evenly arranged around the central hole 13 .

[0034] Specifically, in an optional embodiment, eight first reinforcing ribs 11 and four second reinforcing ribs 12 are provided on the clamping plate 10, and the eight first reinforcing ribs 11 are uniformly arranged around the outer side of the center hole 13 along the circumferential direction and extend radially; the four second reinforcing ribs 12 are uniformly arranged around the outer side of the center hole 13 along the circumferential direction and extend circumferentially.

[0035] Specifically, the radial positions of the first reinforcing ribs 11 and the second reinforcing ribs 12 on the clamping plate 10 are substantially consistent with the radial positions of the anchor holes 14 on the clamping plate 10 , two first reinforcing ribs 11 and one second reinforcing rib 12 are arranged between two adjacent anchor holes 14 , and the second reinforcing rib 12 is located between the two first reinforcing ribs 11 .

[0036] like Figure 2 As shown, the torque limiter 100 includes a shell surrounded by a first cover body 20 and a second cover body 30, the clamping disc 10 is fixed on the first cover body 20, the first cover body 20, the second cover body 30 and the clamping disc 10 are coaxially arranged and connected to the wheel axle of the vehicle through a disc hub 60. The first cover body 20 is provided with a first window, the second cover body 30 is provided with a second window, and the clamping disc 10 is provided with a third window. The first window, the second window and the third window overlap to form an active window 40, and the spring assembly 50 is arranged in the active window 40. When the driving element (not shown in the figure) rotates, the area of ​​the overlapping part of the first window and the second window increases or decreases, thereby changing the size of the active window 40. The spring assembly 50 is arranged in the active window 40. When the active window 40 is reduced, the spring assembly 50 is compressed; when the active window 40 is increased, the spring assembly 50 is released.

[0037] Specifically, the spring assembly 50 includes a first spring seat 51, a second spring seat 52 and a spring body 53. When the driving element rotates, the first spring seat 51 is pushed to the left, while the second spring seat 52 is pressed against the housing and remains stationary, so that the first spring seat 51 and the second spring seat 52 are close to each other, and the spring body 53 is compressed.

[0038] like Figure 4 The torque limiter ( Figure 4 Yellow torque limiter) and torque limiter without reinforcement ribs ( Figure 4 Medium blue torque limiter), torque limiter with only radially extending reinforcing ribs ( Figure 4 The red torque limiter) and the torque limiter with only circumferentially extending reinforcing ribs ( Figure 4 The effect diagram of the Y-axis vibration speed of the torque limiter (purple in the middle) under unit excitation. According to the effect diagram, it can be seen that when the vibration frequency is between 2500Hz-3000Hz (this vibration frequency range is usually the frequency range of the friction system excitation in the torque limiter), the Y-axis vibration speed of the torque limiter of the utility model is the lowest. Since the noise level ultimately generated by the torque limiter is positively correlated to the product of the friction system excitation in the torque limiter and the normal vibration speed of the clamping plate, the noise generated by the torque limiter is ultimately minimized.

[0039] The utility model also discloses a specific implementation of a vehicle, which includes an engine and the torque limiter 100 connected to the output end of the engine.

[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A torque limiter, characterized in that: It comprises a clamping disk, wherein the clamping disk comprises a first reinforcing rib and a second reinforcing rib which are evenly arranged circumferentially around a center line thereof, wherein the first reinforcing rib extends in a radial direction of the clamping disk, and the second reinforcing rib extends in a circumferential direction of the clamping disk.

2. A torque limiter according to claim 1, characterized in that: The clamping disk includes a first disk surface and a second disk surface that are arranged opposite to each other, and the first reinforcing rib and the second reinforcing rib are formed into a rib shape that is convex relative to the first disk surface and concave relative to the second disk surface.

3. A torque limiter according to claim 2, characterized in that: The first reinforcing rib and the second reinforcing rib are formed by stamping, and the first reinforcing rib and the adjacent disk surface of the clamping disk have an arc-shaped transition, and the second reinforcing rib and the adjacent disk surface of the clamping disk have an arc-shaped transition.

4. A torque limiter according to claim 1, characterized in that: The first reinforcing rib and the second reinforcing rib are respectively formed into capsule-shaped ribs, and the capsule-shaped ribs include a rectangular segment and semicircular segments located at both ends of the rectangular segment.

5. A torque limiter according to claim 1, characterized in that: The distance between the center positions of the first reinforcing rib and the second reinforcing rib and the center of the clamping plate is between (1 / 3-1 / 2) of the radius of the clamping plate.

6. A torque limiter according to claim 1, characterized in that: The clamping plate is provided with a central hole and four anchor holes evenly arranged around the central hole.

7. A torque limiter according to claim 6, characterized in that: There are eight first reinforcing ribs, and the eight first reinforcing ribs are evenly arranged around the outside of the center hole along the circumferential direction; there are four second reinforcing ribs, and the four second reinforcing ribs are evenly arranged around the outside of the center hole along the circumferential direction.

8. A torque limiter according to claim 6, characterized in that: Two of the first reinforcing ribs and one of the second reinforcing ribs are arranged between two adjacent anchor holes, and the second reinforcing rib is located between the two first reinforcing ribs.

9. The torque limiter according to claim 1, characterized in that: The torque limiter further comprises a first cover body and a second cover body, the clamping plate is fixed on the first cover body, and the first cover body, the second cover body and the clamping plate are coaxially arranged.

10. A vehicle, characterized in that: It comprises an engine and a torque limiter connected to the output end of the engine, wherein the torque limiter is the torque limiter according to any one of claims 1 to 9.

Images