Torque limiting damper for vehicle engine and vehicle

Abstract

The utility model provides a torsion-limiting shock absorber for a vehicle engine, which comprises a disc hub, a torsion-limiting spring, a torsion-limiting spring, a torsion-limiting spring and a torsion-limiting spring, the disc hub flange is connected with the disc hub, the disc hub flange and the disc hub are concentrically arranged, and a plurality of mounting holes are formed in the circumferential direction of the disc hub flange; the multiple spiral springs are arranged in the mounting holes in a one-to-one correspondence mode, and the spiral springs stretch out and draw back in the circumferential direction of the disc hub flange; the fixing disc is concentrically arranged on one side of the disc hub flange, and a first limiting hole is formed in the position, corresponding to the mounting hole, of the fixing disc; the cover disc is connected with the fixed disc and concentrically arranged on the other side of the disc hub flange, a second limiting hole is formed in the position, corresponding to the mounting hole, of the cover disc, and the multiple spiral springs are clamped between the first limiting hole and the second limiting hole; the mass ring is connected with the fixing disc, and the mass ring and the cover disc are located on the two sides of the fixing disc respectively. According to the torsion-limiting shock absorber for the vehicle engine and the vehicle, the overall axial space and cost of the torsion-limiting shock absorber are reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a torsion damper for a vehicle engine and a vehicle. Background Technology

[0002] Traditional and hybrid passenger vehicle engines generate torsional vibrations. These vibrations, when transmitted to the transmission, can cause abnormal noises or structural damage. When transmitted to the passenger compartment, they significantly impact overall vehicle comfort. Torsional vibration dampers are typically installed on the vehicle's engine to absorb these vibrations.

[0003] During the development of hybrid vehicles, the dedicated transmission for hybrid vehicles integrates multiple structures such as shifting mechanisms, generators, electric motors, and locking mechanisms, which greatly reduces the design space for torsion dampers. Traditional torsion dampers consist of two parts: a primary flywheel assembly and a torsion limiting assembly. These two parts are separate units that need to be disassembled and installed independently. This structure requires each part to be equipped with a housing, which occupies a large amount of space. Utility Model Content

[0004] To at least partially solve the above problems, according to a first aspect of this application, an embodiment of this application provides a torque-limiting damper for a vehicle engine, comprising: a hub for connecting to the crankshaft of the vehicle engine; a hub flange connected to the hub and concentrically disposed therewith, the hub flange having a plurality of mounting holes circumferentially thereon; a plurality of coil springs, each correspondingly disposed within the mounting holes, the coil springs extending and retracting circumferentially along the hub flange, the axial dimension of the mounting holes along the coil springs being less than or equal to the length of the coil springs, and the radial dimension of the mounting holes along the coil springs being greater than the diameter of the coil springs; and a fixed disc concentrically disposed on the hub flange. On one side, a first limiting hole is provided at the position corresponding to the mounting hole on the fixed plate. The dimension of the first limiting hole along the axial direction of the helical spring is the same as that of the mounting hole, and the dimension of the first limiting hole along the radial direction of the helical spring is smaller than the diameter of the helical spring. A cover plate is connected to the fixed plate and is concentrically set on the other side of the hub flange. A second limiting hole is provided at the position corresponding to the mounting hole on the cover plate. The dimensions of the first limiting hole and the second limiting hole are the same. Multiple helical springs are sandwiched between the first limiting hole and the second limiting hole. A mass ring is connected to the fixed plate. The mass ring and the cover plate are located on opposite sides of the fixed plate. The mass ring is used to provide the inertia required to balance the torsional vibration of the engine itself.

[0005] In some embodiments, the distance from the distal end of the mounting hole to the center of the hub flange is greater than the inner diameter of the mass ring.

[0006] In some embodiments, clearance grooves are respectively provided at the positions corresponding to the first limiting hole and the mass ring.

[0007] In some embodiments, the number of helical springs, mounting holes, first limiting holes, and second limiting holes are all 5.

[0008] In some embodiments, the torsion damper further includes two friction plates, with a hub flange sandwiched between the two friction plates and concentrically arranged with the friction plates.

[0009] In some embodiments, the radius of the friction pad is smaller than the distance from the proximal end of the mounting hole to the center of the hub flange.

[0010] In some embodiments, the torsion damper further includes a disc spring disposed between the fixed disc and the disc hub flange.

[0011] In some embodiments, the radius of the disc spring is smaller than the distance from the near end of the mounting hole to the center of the hub flange.

[0012] According to a second aspect of this application, embodiments of this application provide a vehicle equipped with a torsion-limiting damper as provided in any embodiment of the first aspect of this application.

[0013] The embodiments of this application provide a torsion limiting damper for a vehicle engine and a vehicle. The fixed disc, cover disc, and mass ring form a primary flywheel assembly, and the disc hub, disc hub flange, and fixed disc form a torsion limiting assembly. The primary flywheel assembly integrates the housing function. The torsion limiting assembly and the primary flywheel assembly share the fixed disc as the housing, reducing the overall axial space of the torsion limiting damper and providing freedom for the arrangement of the gearbox. At the same time, the cost is reduced by eliminating the single-sided housing. For the OEM, the assembly process of the primary mass and torsion limiting damper is eliminated during the assembly process, reducing labor costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0015] Figure 1 This is an exploded view of the torsional damper provided in an embodiment of this application.

[0016] The attached figures are labeled as follows:

[0017] 10 disc hub; 20 disc hub flange; 21 mounting hole; 30 helical spring; 40 fixed plate; 41 first limiting hole; 50 cover plate; 51 second limiting hole; 60 mass ring; 61 clearance groove; 70 friction plate; 80 disc spring.

[0018] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0019] The preferred embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection claimed in this application.

[0020] The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0021] To at least partially address the aforementioned problems, according to a first aspect of this application, embodiments of this application provide a torsional damper (also known as a torsional shock absorber) for a vehicle engine. For example... Figure 1 As shown, the torsion damper includes a hub 10, a hub flange 20, multiple coil springs 30, a fixed plate 40, a cover plate 50, and a mass ring 60. The hub 10 is used to connect to the crankshaft of a vehicle engine; the hub flange 20 is connected to the hub 10 and is concentrically arranged with it, and multiple mounting holes 21 are provided circumferentially on the hub flange 20; multiple coil springs 30 are respectively and correspondingly arranged in the mounting holes 21, and the coil springs 30 extend and retract circumferentially along the hub flange 20. The axial dimension of the mounting hole 21 along the coil spring 30 is less than or equal to the length of the coil spring 30, and the radial dimension of the mounting hole 21 along the coil spring 30 is greater than the diameter of the coil spring 30; the fixed plate 40 is concentrically arranged on one side of the hub flange 20, and a first limiting hole 41 is provided on the fixed plate 40 at a position corresponding to the mounting hole 21. 1. The axial dimension of the helical spring 30 is the same as that of the mounting hole 21. The radial dimension of the first limiting hole 41 along the helical spring 30 is smaller than the diameter of the helical spring 30. The cover plate 50 is connected to the fixed plate 40 and is concentrically arranged on the other side of the hub flange 20. The cover plate 50 has a second limiting hole 51 at the position corresponding to the mounting hole 21. The first limiting hole 41 and the second limiting hole 51 have the same dimensions. Multiple helical springs 30 are sandwiched between the first limiting hole 41 and the second limiting hole 51. The mass ring 60 is connected to the fixed plate 40. The mass ring 60 and the cover plate 50 are located on both sides of the fixed plate 40. The mass ring 60 is used to provide the inertia required to balance the torsional vibration of the engine itself.

[0022] In this embodiment, the torsion damper can be mounted on the engine crankshaft via the hub 10 to transmit the vibration generated by the crankshaft to the torsion damper. The hub 10 and the crankshaft can be connected, for example, by a key connection. The hub flange 20 is connected to the hub 10 and can rotate under the drive of the hub 10. When the hub flange 20 rotates, the fixed plate 40, the cover plate 50, and the mass ring 60 are delayed in rotation due to inertia, thereby causing the mounting hole 21 to be misaligned with the first limiting hole 41 and the second limiting hole 51. The coil spring 30 in the mounting hole 21 is compressed, thereby absorbing the vibration. When the helical spring 30 is located in the mounting hole 21, both ends of the helical spring 30 can simultaneously abut against the same side of the mounting hole 21, the first limiting hole 41, and the second limiting hole 51. Simultaneously, in the radial direction of the helical spring 30, the first limiting hole 41 and the second limiting hole 51 can limit the radial movement of the helical spring 30, ensuring that the helical spring 30 does not wobble, thus restricting the relative movement of the helical spring 30 around the crankshaft. The fixed plate 40, the cover plate 50, and the mass ring 60 can be connected by rivets.

[0023] The embodiments of this application provide a torsion limiting damper for a vehicle engine and a vehicle. The fixed plate 40, cover plate 50 and mass ring 60 form a primary flywheel assembly, and the disc hub 10, disc hub flange 20 and fixed plate 40 form a torsion limiting assembly. The primary flywheel assembly integrates the housing function. The torsion limiting assembly and the primary flywheel assembly share the fixed plate 40 as the housing, which reduces the overall axial space of the torsion limiting damper and provides freedom for the arrangement of the gearbox. At the same time, the cost is reduced because a single-sided housing is eliminated. For the OEM, the assembly process of the primary mass and torsion limiting damper is eliminated during the assembly process, reducing labor costs.

[0024] In some embodiments, the distance from the distal end of the mounting hole 21 to the center of the hub flange 20 is greater than the inner diameter of the mass ring 60. In this embodiment, this arrangement allows the mounting hole 21 to be farther from the center of the hub flange 20, thereby enabling the mounting hole 21 to be located on a longer circumference of the hub flange 20. This results in a larger diameter distribution of the mounting hole 21, allowing it to have a longer length to accommodate a longer single helical spring 30, thus reducing overall stiffness and improving vibration damping.

[0025] In some embodiments, clearance grooves 61 are respectively provided at positions corresponding to the first limiting hole 41 on the mass ring 60. In this embodiment, this arrangement allows for a smaller axial distance between the mass ring 60 and the fixed disk 40, thereby facilitating a further reduction in the axial dimension of the torsion damper.

[0026] In some embodiments, the number of helical springs 30, mounting holes 21, first limiting holes 41, and second limiting holes 51 are all 5. Traditional torsion dampers use 4 helical springs 30, which have a small spring length, high overall structural stiffness, and poor damping effect. In contrast, this embodiment uses 5 helical springs 30, which have a large distribution diameter, a large length of each individual helical spring 30, low overall stiffness, and good damping effect.

[0027] In some embodiments, the torsion limiting damper further includes two friction plates 70, with a hub flange 20 sandwiched between the two friction plates 70 and concentrically arranged with them. In this embodiment, the opening at the center of the hub flange 20 can be sandwiched between the two friction plates 70, the two friction plates 70 can be sandwiched between the pressure plates of the torsion limiter, and the hub 10 can also be located between the two friction plates 70. The two friction plates 70 can be riveted together and pressed together, so that pressure is generated at the contact points between the friction plates 70 and other parts. When the friction plates 70 move relative to other parts, friction is generated. This friction is the maximum torque transmitted by the flywheel. If this friction exceeds, the system will slide relative to each other, protecting the downstream mechanism from overload damage.

[0028] In some embodiments, the radius of the friction plate 70 is smaller than the distance from the proximal end of the mounting hole 21 to the center of the hub flange 20. In conventional torsion dampers, the friction plate 70 is located outside the coil spring 30, resulting in an increased diameter of the friction plate 70 and increased cost. However, in this embodiment, the friction plate 70 of the torsion damper is moved to the inside of the circle containing the multiple coil springs 30, resulting in a moderate overall diameter and reduced cost.

[0029] In some embodiments, the torsion damper further includes a disc spring 80 disposed between the fixed disc 40 and the hub flange 20. When the primary flywheel assembly and the torsion damping assembly move relative to each other, the disc spring 80 generates a small frictional force, which serves as the basic damping. In some embodiments, the radius of the disc spring 80 is smaller than the distance from the proximal end of the mounting hole 21 to the center of the hub flange 20. In conventional torsion dampers, the disc spring 80 has a small diameter, complex structure, and occupies a large amount of space. In this embodiment, the disc spring 80 of the torsion damper is moved inside the circle containing multiple helical springs 30, reducing the axial space occupied and further reducing the axial dimension of the torsion damper.

[0030] According to a second aspect of this application, embodiments of this application provide a vehicle equipped with a torsion-limiting damper as provided in any embodiment of the first aspect of this application.

[0031] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0032] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A torque-limiting damper for a vehicle engine, characterized in that, include: A crankshaft hub is used to connect to the crankshaft of a vehicle's engine. A hub flange is connected to the hub and is concentrically arranged with the hub. The hub flange has multiple mounting holes in its circumference. Multiple helical springs are respectively and correspondingly disposed in the mounting holes. The helical springs extend and retract along the circumference of the hub flange. The dimension of the mounting hole along the axial direction of the helical spring is less than or equal to the length of the helical spring. The dimension of the mounting hole along the radial direction of the helical spring is greater than the diameter of the helical spring. A fixed plate is concentrically disposed on one side of the hub flange. A first limiting hole is provided on the fixed plate at the position corresponding to the mounting hole. The dimension of the first limiting hole along the axial direction of the helical spring is the same as that of the mounting hole. The dimension of the first limiting hole along the radial direction of the helical spring is smaller than the diameter of the helical spring. A cover plate is connected to the fixed plate and is concentrically arranged on the other side of the hub flange. A second limiting hole is opened at the position corresponding to the mounting hole on the cover plate. The first limiting hole and the second limiting hole are the same size. A plurality of helical springs are sandwiched between the first limiting hole and the second limiting hole. A mass ring is connected to the fixed disk, and the mass ring and the cover disk are located on opposite sides of the fixed disk. The mass ring is used to provide the inertia required to balance the torsional vibration of the engine itself.

2. The torsional damper according to claim 1, characterized in that, The distance from the far end of the mounting hole to the center of the hub flange is greater than the inner diameter of the mass ring.

3. The torsional damper according to claim 2, characterized in that, The mass ring and the position corresponding to the first limiting hole are respectively provided with clearance grooves.

4. The torsional damper according to claim 2, characterized in that, The number of the helical spring, the mounting hole, the first limiting hole, and the second limiting hole are all 5.

5. The torsional damper according to claim 1, characterized in that, It also includes two friction plates, with the hub flange sandwiched between the two friction plates and concentrically arranged with them.

6. The torsional damper according to claim 5, characterized in that, The radius of the friction plate is smaller than the distance from the near end of the mounting hole to the center of the hub flange.

7. The torsional damper according to claim 5, characterized in that, It also includes a disc spring, which is disposed between the fixed plate and the disc hub flange.

8. The torsional damper according to claim 7, characterized in that, The radius of the disc spring is smaller than the distance from the near end of the mounting hole to the center of the hub flange.

9. A vehicle, characterized in that, The vehicle is equipped with a torsion damper as described in any one of claims 1-8.

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