Damping device

Abstract

The utility model relates to a kind of damping devices.The damping device includes first rotating component, second rotating component and damping spring, first rotating component and second rotating component can rotate relative to each other around common central axis, annular cavity that accommodates damping spring is formed between first rotating component and second rotating component, first rotating component includes annular radial section, radial section and second rotating component jointly define the side wall of the axial side of cavity, second rotating component includes axial through hole, the damping device further includes annular sealing cover, the radial outer circumferential section of sealing cover abuts the side surface of radial section facing away from cavity, the radial inner circumferential section of sealing cover is on the radial inside of through hole Abuts the side surface of second rotating component facing away from cavity, so that sealing cover extends over through hole in radial, sealing cover is fixed to one of radial section and second rotating component.The damping device of the utility model has improved structure.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology. Specifically, this utility model relates to a vibration damping device. Background Technology

[0002] Vibration damping devices are installed in the transmission system of motor vehicles, typically located between the engine and the transmission, to absorb and buffer torque vibrations. Common disc dampers usually consist of a flywheel, a flange, and several damping springs. The flywheel and flange can rotate relative to each other and transmit torque through the damping springs. The damping springs are compressed during torque transmission, thus buffering torque vibrations through elastic deformation. For example, in dampers using arc springs, the springs are installed in an annular cavity defined by the flywheel and flange to facilitate lubrication. However, the flywheel of the damper is usually fixed to the engine crankshaft by bolts or rivets. To facilitate the installation of these fasteners, through holes are usually pre-drilled in the flange. These holes can allow external water or contaminants to enter the cavity, degrading the lubricant and reducing its lubrication effect. Utility Model Content

[0003] Therefore, the technical problem that this utility model needs to solve is to provide an improved vibration damping device.

[0004] The above-mentioned technical problems are solved by a vibration damping device according to the present invention. The vibration damping device includes a first rotating component, a second rotating component, and a damping spring. The first and second rotating components are rotatable relative to each other about a common central axis. The damping spring is circumferentially mounted between the first and second rotating components to transmit torque between them. An annular cavity for accommodating the damping spring is formed between the first and second rotating components. The first rotating component includes an annular radial section, which, together with the second rotating component, defines a sidewall on one axial side of the cavity. The radial section is offset radially outward relative to the second rotating component. The second rotating component includes an axially penetrating through-hole through which the cavity communicates with the external space. The vibration damping device also includes an annular sealing cap. The outer radial peripheral section of the sealing cap abuts against the side surface of the radial section facing away from the cavity, and the inner radial peripheral section of the sealing cap abuts against the side surface of the second rotating component facing away from the cavity on the radially inner side of the through-hole, such that the sealing cap extends radially across the through-hole and the contact gap between the radial section and the second rotating component. The sealing cap is fixed to one of the radial section and the second rotating component. The sealing cap can block the contact gaps and through holes, thereby improving the sealing of the cavity and ensuring the lubrication effect in the cavity.

[0005] According to a preferred embodiment of the present invention, the sealing cap can be elastically installed into the vibration damping device in a pre-elastic deformation manner, such that the sealing cap is pressed against the other of the radial section and the second rotating component through elastic deformation. This ensures close contact between the sealing cap and the friction contact area, improving the sealing effect.

[0006] According to another preferred embodiment of the present invention, the sealing cap can be formed as a diaphragm spring. This allows for elastic contact to be achieved through a simple structure.

[0007] According to another preferred embodiment of the present invention, one of the radial section and the second rotating component may include one or more fixing protrusions protruding axially away from the cavity, and the sealing cover may include one or more fixing holes extending axially, with each fixing protrusion passing through a corresponding fixing hole axially to fix the sealing cover to one of the radial section and the second rotating component. This facilitates the installation of the sealing cover.

[0008] According to another preferred embodiment of the present invention, the one or more fixing protrusions can be formed as stamped structures. This allows the fixing protrusions to be formed using a simple process.

[0009] According to another preferred embodiment of the present invention, one of the radial section and the second rotating component may include a plurality of fixing protrusions spaced apart circumferentially, and the sealing cover may include a plurality of fixing holes spaced apart circumferentially accordingly. This allows the sealing cover to be stably fixed.

[0010] According to another preferred embodiment of the present invention, the sealing cap can be radially extended neither outward beyond the first rotating component nor inward beyond the second rotating component. This avoids increasing the radial dimension of the vibration damping device.

[0011] According to another preferred embodiment of the present invention, the sealing cap can directly abut against or indirectly abut against the other of the radial section and the second rotating component via a friction pad. A seal can be achieved regardless of whether the sealing cap is in direct contact with the friction surface.

[0012] According to another preferred embodiment of the present invention, the vibration damping device may further include a fixing member for fixing the first rotating component to the input shaft, the fixing member being radially aligned with the through hole. The through hole facilitates the installation of the fixing member.

[0013] According to another preferred embodiment of the present invention, the sealing cap can be fixed to the radial section. This places the fixing area of ​​the sealing cap radially outside the friction contact area, thereby reducing the area of ​​the friction area and increasing the area of ​​the fixing area. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings. In the drawings, the same reference numerals represent elements with the same function. Wherein:

[0015] Figure 1 A longitudinal sectional view of a vibration damping device according to an exemplary embodiment of the present invention is shown. Detailed Implementation

[0016] The following describes specific embodiments of the vibration damping device according to the present invention in conjunction with the accompanying drawings. The detailed description and drawings below are provided to exemplify the principles of the present invention. The present invention is not limited to the described preferred embodiments, and the scope of protection of the present invention is defined by the claims.

[0017] According to an embodiment of the present invention, a vibration damping device is provided. This vibration damping device can be installed in the transmission system of a motor vehicle, for example, arranged between the engine and the transmission, to buffer torque vibrations in the transmission system.

[0018] Figure 1 A schematic diagram of an exemplary embodiment of the vibration damping device according to the present invention is shown. The vibration damping device is generally disc-shaped. Figure 1 This is a longitudinal sectional view through its central axis. For example... Figure 1 As shown, the vibration damping device includes a first rotating component 10, a second rotating component 20, and one or more damping springs 30. The first rotating component 10 and the second rotating component 20 are arranged coaxially with each other and are capable of rotating relative to each other about a common central axis. Each damping spring 30 is mounted between the first rotating component 10 and the second rotating component 20 in a circumferential direction about the central axis. Preferably, the vibration damping device can be provided with a plurality of damping springs 30 spaced apart circumferentially, particularly evenly spaced. Each damping spring 30 can be formed as an identical helical spring, particularly an arc spring. The two ends of each damping spring 30 abut against the two rotating components respectively, so that when the two rotating components rotate relative to each other or there is a tendency for relative rotation, torque can be transmitted through the damping springs 30, and torque vibration is buffered by elastically compressing the damping springs 30.

[0019] In the transmission system of a motor vehicle, the first rotating component 10 is typically fixedly connected to the input shaft (e.g., the crankshaft of an engine) at the front end, serving as an input / output terminal of a damping device. The first rotating component 10 can, for example, be formed as a flywheel with a large moment of inertia, thereby using rotational inertia to buffer torque vibrations from the engine. Figure 1As shown, the first rotating component 10 includes a main body section 11, an axial section 12, and a radial section 13. The main body section 11 is an annular circular plate-like structure extending generally radially around the central axis of the damping device. It can be fixed to the input shaft at the front end (e.g., the crankshaft of an engine) by one or more fasteners 40, so that the entire first rotating component 10 can rotate synchronously with the input shaft. The fasteners 40 can be various common fasteners such as bolts or rivets. The axial section 12 extends generally in an axial direction away from the input end from the radially outer periphery of the main body section 11, thus forming a generally cylindrical structure. The radial section 13 extends generally in a radially inward direction from the axial end of the axial section 12 away from the main body section 11, thus forming a generally annular circular plate-like structure. The radial extension length of the radial section 13 is less than that of the main body section 11, such that the radially inner periphery of the radial section 13 is offset outward relative to the radially inner periphery of the main body section 11. The axial section 12 and the radial section 13 together form the flange structure of the first rotating member 10 and provide a cavity that opens radially inward. Each damping spring 30 is housed within this cavity. The surfaces of the first rotating member 10 that contact the damping springs 30 can provide radial and axial limiting effects on the damping springs.

[0020] The second rotating component 20 can be fixedly connected to the input shaft at the rear end as another input / output end of the vibration damping device. For example... Figure 1 As shown, the second rotating component 20 is formed as a generally annular circular plate-shaped component with a hub, which can be torsionally connected to, for example, the input shaft of a transmission through the central hub. To meet different performance requirements, the plate-shaped portion (flange plate) of the second rotating component 20 can be formed separately from the hub and then fixed together by welding or fasteners, or it can be formed integrally; the present invention does not limit this. Figure 1As shown, the second rotating component 20 and the main body section 11 of the first rotating component 10 are arranged axially spaced apart. The hub and radially inner peripheral section of the second rotating component 20 are located radially inside the radial section 13 of the first rotating component 10, thus being radially offset from the radial section 13. However, the radially outer peripheral section of the second rotating component 20 extends into the space between the main body section 11 and the radial section 13 to abut against the damping spring 30. Overall, the radial section 13 is offset radially outward relative to the second rotating component 20. The side surfaces of the second rotating component 20 and the radial section 13 facing the main body section 11 abut against each other directly or indirectly. Preferably, a friction pad 60 can be provided between the second rotating component 20 and the radial section 13 to achieve indirect frictional contact. Thus, the first rotating component 10 and the second rotating component 20 together define an annular cavity for accommodating the damping spring 30. The axial section 12 defines the radial outer wall of the cavity, the radial section 13 and the second rotating member 20 together define the side wall of one axial side of the cavity, and the main body section 11 defines the side wall of the other axial side of the cavity.

[0021] Because the damping spring 30 rubs against the first rotating component 10 during movement and elastic deformation, a lubricant is filled in the cavity to lubricate both the damping spring 30 and the first rotating component 10. Theoretically, it is desirable for the cavity to remain as closed as possible to prevent lubricant leakage or contamination from external impurities such as water. However, in practice, to connect the entire damping device to the front input shaft (e.g., the crankshaft of an engine), one or more axially penetrating through holes 21 need to be formed on the second rotating component 20. When multiple through holes 21 exist, they are circumferentially spaced around the central axis of the damping device. These through holes 21 are radially aligned with the mounting position of the fastener 40, allowing the fastener 40 to be mounted to the first rotating component 10 and the input shaft via the through holes 21. However, this allows the cavity to communicate with the external space via the through holes 21, thus creating a risk of lubricant leakage and contamination.

[0022] Therefore, the vibration damping device also includes a sealing cap 50 for shielding the through-hole 21. The sealing cap 50 is formed as a generally annular circular plate-shaped component, which is fixed to one of the radial section 13 and the second rotating component 20 and in frictional contact with the other. Specifically, the radially outer peripheral section of the sealing cap 50 abuts against the side surface of the radial section 13 of the first rotating component 10 facing away from the cavity, and the radially inner peripheral section of the sealing cap 50 abuts against the side surface of the second rotating component 20 facing away from the cavity in the region radially inside the through-hole 21, such that the sealing cap 50 extends radially across the through-hole 21 and the contact gap between the radial section 13 and the second rotating component 20. This shields the contact gap between the radial section 13 and the second rotating component 20, as well as the through-hole 21, from the outside of the cavity by the sealing cap 50. This reduces the risk of lubricant leakage or contamination by external impurities in the cavity. However, the sealing cap 50 preferably does not extend outward beyond the first rotating member 10 or inward beyond the second rotating member 20 in the radial direction, thereby avoiding increasing the radial dimension of the entire vibration damping device.

[0023] In a preferred embodiment, such as Figure 1 As shown, the sealing cap 50 can be fixed to the radial segment 13 and make frictional contact with the second rotating component 20. The advantages of this arrangement are twofold: firstly, the frictional contact surface area is offset radially inward, resulting in a smaller contact surface area and less additional frictional force and torque; secondly, the area for fixing the sealing cap 50 is offset radially outward, resulting in a larger fixing area and facilitating the formation of a fixing structure. However, in an alternative embodiment, the sealing cap 50 can also be fixed to the second rotating component 20 and make frictional contact with the radial segment 13.

[0024] In a preferred embodiment, such as Figure 1 As shown, the sealing cap 50 can be elastic, for example, made of an elastic metallic material. The elastic sealing cap 50 is installed in the vibration damping device in a pre-elastic deformation manner, such that the sealing cap 50 is pressed against the surface it frictionally contacts (i.e., the other of the aforementioned radial section 13 and the second rotating member 20) through elastic deformation. This ensures stable contact between the sealing cap 50 and the friction contact surface. For example, in Figure 1 In the illustrated embodiment, the sealing cap 50 is pressed against the side surface of the second rotating member 20 facing away from the cavity by elastic deformation. Particularly preferably, the sealing cap 50 can be formed as a diaphragm spring, thereby having suitable elastic deformation capability.

[0025] The sealing cap 50 can directly abut against its friction contact surface, or indirectly abut against its friction contact surface via an additional friction pad. For example, in Figure 1 In the embodiment shown, the sealing cap 50 directly abuts against the side surface of the second rotating component 20.

[0026] The sealing cap 50 is preferably secured in a simple manner. Specifically, the components in the radial section 13 and the second rotating member 20 for securing the sealing cap 50 may include one or more retaining protrusions projecting axially away from the cavity, for example, in Figure 1 In the illustrated embodiment, the radial segment 13 includes one or more retaining protrusions 14 projecting axially away from the cavity. Correspondingly, the sealing cap 50 may include one or more retaining holes extending axially through it, with each retaining protrusion 14 passing axially through a corresponding retaining hole, thereby securing the sealing cap 50 to a corresponding one of the radial segment 13 and the second rotating component 20 by an interference fit. The retaining protrusions on the radial segment 13 or the second rotating component 20 may be formed as stamped structures. Preferably, the components in the radial segment 13 and the second rotating component 20 for securing the sealing cap 50 may include a plurality of such retaining protrusions spaced apart circumferentially, particularly uniformly, while the sealing cap 50 includes a plurality of retaining holes spaced apart circumferentially, particularly uniformly, in a corresponding manner. This ensures stable installation of the sealing cap 50.

[0027] The vibration damping device of this invention improves the sealing of the cavity where the vibration damping spring is installed by adding a sealing cover, thereby ensuring the lubrication effect of the spring and improving the service life of the vibration damping device. Furthermore, this vibration damping device has a simple structure, is easy to assemble, and has good cost-effectiveness.

[0028] While possible embodiments have been described exemplarily in the foregoing description, it should be understood that numerous variations of the embodiments exist through combinations of all known and readily conceived technical features and implementation methods. Furthermore, it should be understood that the exemplary embodiments are merely examples and do not in any way limit the scope, application, or construction of this invention. The foregoing description is more intended to provide those skilled in the art with technical guidance for transforming at least one exemplary embodiment, wherein various changes, particularly regarding the function and structure of the components, can be made without departing from the scope of the claims.

[0029] Appendix Label Table

[0030] 10 First rotating component

[0031] 11 Main body section

[0032] 12 Axial Sections

[0033] 13 Radial Section

[0034] 14 Fixed protrusions

[0035] 20 Second rotating component

[0036] 21 Through Hole

[0037] 30 damping springs

[0038] 40 Fasteners

[0039] 50 Sealing Cap

[0040] 60 friction pad

Claims

1. A vibration damping device comprising a first rotating component (10), a second rotating component (20), and a damping spring (30), the first rotating component (10) and the second rotating component (20) being rotatable relative to each other about a common central axis, the damping spring (30) being circumferentially mounted between the first rotating component (10) and the second rotating component (20) to transmit torque between them, an annular cavity accommodating the damping spring (30) being formed between the first rotating component (10) and the second rotating component (20), the first rotating component (10) comprising an annular radial segment (13) that, together with the second rotating component (20), defines a sidewall on one axial side of the cavity, the radial segment (13) being radially offset outward relative to the second rotating component (20), the second rotating component (20) comprising an axially penetrating through hole (21) through which the cavity communicates with an external space, characterized in that, The vibration damping device further includes an annular sealing cap (50), the outer radial portion of which abuts against the side surface of the radial portion (13) facing away from the cavity, and the inner radial portion of which abuts against the side surface of the second rotating component (20) facing away from the cavity on the radially inner side of the through hole (21), such that the sealing cap (50) extends radially across the through hole (21) and the contact gap between the radial portion (13) and the second rotating component (20), and the sealing cap (50) is fixed to one of the radial portion (13) and the second rotating component (20).

2. The vibration damping device according to claim 1, characterized in that, The sealing cap (50) is elastic and is installed in the vibration damping device in a pre-elastic deformation manner, such that the sealing cap (50) is pressed against the other of the radial section (13) and the second rotating component (20) by elastic deformation.

3. The vibration damping device according to claim 2, characterized in that, The sealing cap (50) is formed as a diaphragm spring.

4. The vibration damping device according to claim 2, characterized in that, One of the radial section (13) and the second rotating component (20) includes one or more fixing protrusions (14) projecting axially away from the cavity, and the sealing cap (50) includes one or more fixing holes extending axially, each fixing protrusion (14) passing through a corresponding fixing hole axially to secure the sealing cap (50) to one of the radial section (13) and the second rotating component (20).

5. The vibration damping device according to claim 4, characterized in that, The one or more fixed protrusions (14) are respectively formed as stamped structures.

6. The vibration damping device according to claim 4, characterized in that, One of the radial section (13) and the second rotating component (20) includes a plurality of fixed protrusions (14) spaced apart circumferentially, and the sealing cap (50) includes a plurality of fixed holes spaced apart circumferentially accordingly.

7. The vibration damping device according to claim 2, characterized in that, The sealing cap (50) does not extend outward in the radial direction beyond the first rotating component (10) and does not extend inward beyond the second rotating component (20).

8. The vibration damping device according to claim 2, characterized in that, The sealing cap (50) directly abuts or indirectly abuts the other of the radial section (13) and the second rotating component (20) via a friction pad.

9. The vibration damping device according to claim 1, characterized in that, The vibration damping device further includes a fixing member (40) for fixing the first rotating component (10) to the input shaft, the fixing member (40) being radially aligned with the through hole (21).

10. The vibration damping device according to any one of claims 1 to 9, characterized in that, The sealing cap (50) is fixed to the radial section (13).

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