CN116336135A

CN116336135A - Vibration damping module and power transmission system

Info

Publication number: CN116336135A
Application number: CN202111578429.5A
Authority: CN
Inventors: 包顺程; 何连宝; 范意中; 叶鉴申
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2023-06-27

Abstract

The invention relates to a vibration reduction module and a power transmission system. The vibration damping module comprises a vibration damper and a torque limiter, the torque limiter (200) is used for transmitting torque which does not exceed a preset torque between a power component and the vibration damper (100), and the vibration damper (100) is used for reducing torsional vibration, wherein the vibration damper (100) comprises a first side plate (101) and a second side plate (102) which are fixed together, a damping spring and at least one flange which is positioned between the two side plates and rotates with the two side plates around a common rotation axis; the first side plate (101) is arranged on a side of the damper (100) close to the power member and a center accommodating portion (101A) is provided radially inside the first side plate (101), and an outer diameter of the center accommodating portion (101A) is larger than an outer diameter of a portion of a fixing member (500) for fixing a flywheel to the power member on the side of the damper (100) with respect to a rotation axis of the damper (100).

Description

Vibration damping module and power transmission system

Technical Field

The present invention relates to power transmission for vehicles, and in particular to a vibration reduction module and a power transmission system.

Background

The engine has a large fluctuation in the rotational speed after starting up to before the rotational speed of the engine stabilizes, resulting in unstable torque transmitted from the engine to the transmission; in addition, after the rotational speed of the engine stabilizes, there is still a degree of torsional vibration superimposed. The phenomenon of torsional vibration is particularly remarkable in a hybrid system because there are at least two power machines in the hybrid system of an automobile, and a large torque shock is easily generated in the hybrid system during switching, coupling, and decoupling of different power sources.

Accordingly, a vibration damping device is typically provided between the power source and the transmission to reduce torsional vibrations from the power source.

In view of the possibility that the transmission or the engine may be damaged when the torque is excessively large, the vibration damping device may be provided with a torque limiting function to prevent excessive torque from being transmitted to the transmission while absorbing torsional vibration.

However, the conventional vibration damping device with the torque limiting function is large in size and high in cost, and cannot meet the requirement of the situation that the installation space is severe.

Disclosure of Invention

The invention aims to provide a vibration reduction module which is small in size and low in cost. Another object of the present invention is to provide a power transmission system including the vibration damping module, which has advantages equally applicable to the power transmission system of the present invention.

An aspect of the present invention provides a vibration damping module, which includes a vibration damper and a torque limiter,

the torque limiter is used for transmitting torque which does not exceed a preset torque between a power component and the shock absorber, the shock absorber is used for reducing torsional vibration and comprises a first side plate and a second side plate which are fixed together, a shock absorption spring and at least one flange which is positioned between the two side plates and rotates with the two side plates around a common rotation axis;

the first side plate is disposed on a side of the damper close to the power member and is provided with a center receiving portion radially inward of the first side plate, and an outer diameter of the center receiving portion is larger than an outer diameter of a portion of a fixing piece for fixing the flywheel to the power member on the damper side with respect to a rotation axis of the damper.

The center receiving portion of the first side plate is configured to penetrate a center hole of the first side plate in an axial direction of the vibration damping module.

The fixing member is configured as a screw or a bolt, and a head of the screw or the bolt faces the damper, the head of the screw or the bolt being at least partially accommodated in the center accommodating portion of the first side plate.

The radially inner end of the first side plate is further provided with a bending portion which is bent toward the power member, and the bending portion is located radially outside the center accommodating portion.

The bent portion overlaps at least a portion of the fixing member located on the damper side in the axial direction.

The torque limiter comprises two friction plates, a diaphragm spring and a connecting plate fixed to the flywheel, wherein the fixing piece is used for fixing the flywheel to the power component, the torque limiter further comprises a supporting plate which is positioned between the first side plate and the second side plate and is connected with the first side plate and the second side plate in a torsion-resistant way, the diaphragm spring is arranged between the first side plate and the supporting plate in a precompressed way, and the two friction plates are respectively arranged between the supporting plate and the connecting plate and between the connecting plate and the second side plate.

The flywheel includes a first flywheel portion and a second flywheel portion fixed together, the first flywheel portion being constructed in a sheet shape and fixed to a power member via the fixing member, and the connection plate being fixed to the second flywheel portion.

The at least one flange is one flange, two flanges or three flanges.

The damper comprises a first flange and a second flange, damping spring windows corresponding to the spring windows of the first side plate and the second side plate are arranged on the first flange and the second flange, the damping springs are accommodated in the spring windows and the damping spring windows, the first flange or the second flange can be connected with the first side plate and the second side plate in a torsion-resistant mode through pins optionally, and the first flange and the second flange are connected with the output hub in a torsion-resistant mode.

The first side plate is arranged on a side of the damper close to the engine and provided with a center receiving portion, and a projection of a fixing member for fixing the torque limiter to the engine along an axial direction of the damper module falls into the center receiving portion.

According to an embodiment of the invention, the first flange and the second flange are arranged identical to each other and with their identical end faces facing each other.

According to an embodiment of the present invention, the damper coil spring is accommodated in the window portion of both the first flange and the second flange, and the first side plate and the second side plate are provided with stopper portions for preventing the damper coil spring from being separated from the window portion in the axial direction of the damper module.

According to an embodiment of the present invention, a pair of claws extending into the vibration damping coil spring are provided at the window portions of the first flange and the second flange, respectively.

According to an embodiment of the invention, the first side plate and the second side plate transfer torque to the first flange via round head rivets.

According to an embodiment of the invention, the fixing member is configured as a screw, and a head of the screw is at least partially accommodated in the center accommodating portion of the first side plate.

Another aspect of the invention provides a power transmission system, comprising an engine and a transmission,

wherein, the liquid crystal display device comprises a liquid crystal display device,

further comprising a vibration reduction module disposed between the engine and the transmission of any of the preceding claims.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, like numbering represents like elements, in which:

fig. 1 schematically illustrates a power transmission system according to an embodiment of the invention.

Fig. 2 schematically illustrates an exploded view of a power transmission system according to an embodiment of the invention.

Detailed Description

Specific embodiments of a vibration damping module and a power transmission system according to the present invention will be described below with reference to the accompanying drawings. The following detailed description and the accompanying drawings are provided to illustrate the principles of the invention and are not limited to the preferred embodiments described, but may be used alone or in any combination, the scope of which is defined by the claims.

Furthermore, spatially relative terms (such as "upper," "lower," "left," and "right," etc.) are used to describe relative positions of an element illustrated in the figures with respect to another element. Thus, spatially relative terms may be applied to directions other than those illustrated in the drawings when used. It will be apparent that, although all of these spatially related terms refer to the directions shown in the drawings for ease of description, those skilled in the art will appreciate that directions other than those shown in the drawings may be used.

Fig. 1 schematically illustrates a power transmission system according to an embodiment of the invention. A power transmission system according to an embodiment of the invention is described below with reference to fig. 1.

The power transmission system 10 of the embodiment of the invention includes an engine and a transmission, both of which are not shown in fig. 1 as a whole, and only part of the components thereof, namely, a crankshaft 300 of the engine and an output hub 400 that is connected in torsion with an input shaft of the transmission, are shown in fig. 1.

As shown in fig. 1, in the power transmission system 10 according to the present invention, a vibration damping module including a vibration damper 100 and a torque limiter 200 between the engine and the transmission is included in addition to the engine on the left side and the transmission on the right side, and therefore, the vibration damping module of the present invention has a torsion vibration damping function and a torque limiting function, which will be described in detail below. In the power transmission system 10 according to the embodiment of the invention shown in fig. 1, the engine located on the left side of fig. 1 outputs torque via the crankshaft 300, which is transmitted to the vibration damping module and then to the transmission via the output hub 400, which is in torsional connection with the input shaft of the transmission.

Fig. 2 schematically illustrates an exploded view of a power transmission system according to an embodiment of the invention. A vibration damping module in a power transmission system according to an embodiment of the present invention is described in detail below with reference to fig. 1 and 2.

As shown in fig. 1 and 2, in the vibration damping module according to the present invention, the vibration damper 100 includes a first side plate 101, a second side plate 102, a first flange 103, a second flange 104, which are rotated about a common rotation axis, and further includes a vibration damping coil spring 105. The above-described components of shock absorber 100 are described in detail below.

As shown in fig. 1, the first side plate 101 and the second side plate 102 are fixed together, for example, via rivets, and both together serve as torque input ends of the damper 10.

The first flange 103 and the second flange 104 are located between the first side plate 101 and the second side plate 102, and one end of the damper coil spring 105 is connected to the first flange 103 and the other end is connected to the second flange 104. Specifically, both the first flange 103 and the second flange 104 are provided with window portions, that is, a window portion 103A and a window portion 104A, in which

window portions

103A and 104A of the two flanges are aligned with each other, the damper coil spring 105 is accommodated, and one end thereof is connected to the window portion 103A of the first flange 103 and the other end thereof is connected to the window portion 104A of the second flange 104. It can be understood that the vibration damping coil spring 105 is positioned in the window portion with its axial both ends abutting against the window portions of the first flange 103 and the second flange 104, respectively, in the circumferential direction thereof. In addition, in order to prevent the damper coil spring 105 from moving in the radial direction of the flange, a claw 1031 protruding into one end of the damper coil spring 105 is provided at the window portion 103A of the first flange 103, a claw 1041 protruding into the other end of the damper coil spring 105 is provided at the window portion 104A of the second flange 104, and the pair of

claws

1031, 1041 can restrict the damper coil spring 105 from moving in the radial direction thereof with respect to both the first flange 103 and the second flange 104, so that the damper coil spring 105 is kept in a centered state. Furthermore, the first side plate 101 and the second side plate 102 are provided with stoppers for preventing the damper coil spring 105 from being separated from the window portion in the axial direction of the damper module, the structures of these two stoppers are substantially the same and are shown in fig. 1 and 2, and it can be clearly seen from fig. 2 that the stopper 102A is in the form of a window arch.

In the damper 100, torque can be transmitted from the output hub 400 to the first side plate 101 and the second side plate 102, the damper coil spring 105, the first flange 103 or the second flange 104, and the output hub 400 in this order, but the torque may be reversely transmitted from the output hub 400 to the first side plate and the second side plate via the paths described above.

As shown in fig. 1 and 2, in the vibration damping module according to the present invention, the torque limiter 200 includes two

friction plates

201A and 201B, a diaphragm spring 203, and a connection plate 204. The connection plate 204 is connected to the flywheel 202 for receiving or outputting torque from the flywheel 202. A fastener 500 (e.g., a rivet) is used to secure the flywheel 202 to the crankshaft 300 of the engine for rotation with the crankshaft 300 to receive torque from the engine.

The above-described components of the torque limiter 200 are described in detail below.

The diaphragm spring 203 is provided between the first side plate 101 and the support plate 106 of the damper 100 (the support plate is fixed with the first side plate 101, the second side plate 102, for example, via rivets), one friction plate 201A is provided to be connected with the support plate 106, the other friction plate 201B is provided to be connected with the second side plate 102, and the two

friction plates

201A, 201B are provided on both sides of the connection plate 204. For example, recesses are provided on one side end surfaces of both the

friction plates

201A and 201B, and projections are provided on the support plate 106 and the second side plate 102 to be respectively fitted with the recesses of the friction plates, so as to ensure that the

friction plates

201A and 106, and the friction plates 201B and the second side plate 102 are respectively connected together without relative movement.

The support plate 106, the

friction plates

201A and 201B, the connection plate 204, and the second side plate 102 are pressed by the diaphragm spring 203.

When the crankshaft 300 of the engine rotates, the crankshaft 300 will drive the flywheel 202 to rotate therewith. The diaphragm spring 203 compresses the support plate 106, the

friction plates

201A and 201B, the connection plate 204, and the second side plate 102 such that when there is relative rotation or a tendency for relative rotation between the support plate 106 and the second side plate 102 and the connection plate 204 at the

friction plates

201A, 201B, a friction force is generated on the contact surface between the

friction plates

201A, 201B and the connection plate 204, thereby transmitting torque to the support plate 106 and the second side plate 102, and thus to the first side plate 101, by the friction force. As previously described, the first side plate 101 and the second side plate 102 serve as torque input terminals of the damper 100, introducing torque into the damper 100.

If the torque transmitted from the crankshaft 300 to the flywheel 202 is excessive, the excessive torque exceeds the maximum torque provided by the maximum friction force generated between the

friction plates

201A, 201B and the connecting plate 204 due to the pressing force of the diaphragm springs 203 acting on the

friction plates

201A, 201B and the connecting plate 204, and at this time, slip will occur between the

friction plates

201A, 201B and the connecting plate 204, and only the maximum torque is transmitted; therefore, the torque limiter 200 transmits torque within a predetermined range to the first side plate 101 and the second side plate 102, and excessive torque cannot be transmitted to the damper 100 due to slip between the connecting plate 204 and the

friction plates

201A, 201B. The maximum torque can be adjusted by adjusting the pressing force of the diaphragm spring 203 and/or the friction coefficients of the

friction plates

201A, 201B.

Optionally, a diaphragm spring and friction pad may also be provided around the output hub 400 to further absorb torsional vibrations, which will not be described in detail herein, and may be provided in a known manner. Next, the output hub 400 serves as an output end of the damper 100, outputting torque to an input shaft of the transmission, and the output hub 400 and the input shaft of the transmission may be connected in a rotationally fixed manner by, for example, splines.

In the vibration damping module of the present invention, as shown in fig. 1, the first side plate 101 is disposed on the side of the vibration damper 100 close to the engine (i.e., the left side of the vibration damper 100 in fig. 1) and provided with the center housing 101A, and the projection of the fixing member 500 for fixing the flywheel 202 to the crankshaft 300 of the engine in the axial direction of the vibration damping module falls into the center housing 101A. It can be appreciated that in the vibration damping module of the present invention, the central receiving portion 101A of the first side plate 101 is sized larger so as to reserve a sufficient installation space/receiving space for the fixing member 500 to avoid interference with the positioning of the fixing member 500 in the axial direction of the vibration damping module, which is advantageous in reducing the axial dimension of the vibration damping module so as to ensure that the vibration damping module has a smaller volume, and the vibration damping module of the present invention employs a coil spring as a vibration damping spring while ensuring a smaller volume, thus reducing costs.

Specifically, in the radial direction, the radially inner end of the first side plate 101 is located radially outward of the mount 500; that is, the outer diameter of the center accommodating portion 101A of the first side plate 101 is larger than the outermost radius of the portion of the mount 500 on the damper side, specifically, the largest radius of the head portion of the mount 500 with respect to the damper rotation axis.

Further, the radially inner end of the first side plate 101 at least partially overlaps the fixing member 500 in the axial direction, and by such an axially overlapping arrangement, the axial space of the damper 100 can be shortened, so that the axial dimension of the damper module can be reduced.

Further, the radially inner end portion of the first side plate 101 is configured with a bent portion, as shown in fig. 1, for improving the structural strength and rigidity of the radially inner end of the first side plate 101. The bent portion extends to be bent toward the flywheel, and the axial space on the radially inner side of the damper coil spring 105 can be fully utilized, so that the structural strength and rigidity of the first side plate 101 can be ensured even with a reduced axial installation space.

According to an embodiment of the present invention, the fixing member is configured as a screw or a bolt, and a head of the screw or the bolt is at least partially accommodated in the center accommodating portion of the first side plate; and a center receiving portion of the first side plate is configured to penetrate a center hole of the first side plate in an axial direction of the vibration damping module. This contributes to a further reduction in the size of the damping module in the axial direction, so that the damping module has a smaller volume.

According to an embodiment of the present invention, as shown in fig. 1, the flywheel 202 includes a first flywheel portion 202A and a second flywheel portion 202B fixed together, the first flywheel portion 202A is constructed in a sheet shape and fixed to a crankshaft 300 of the engine via a fixing member 500, and the connection plate 204 is connected to the second flywheel portion 202B. For example, the first flywheel portion 202A of the flywheel 202 is formed from sheet metal and the second flywheel portion 202B of the flywheel 202 is a cast piece, with the web 204 and the second flywheel portion 202B being secured together via rivets. It can be appreciated that the laminar first flywheel portion 202A facilitates further reducing the size of the damper module in the axial direction, thereby allowing the damper module to have a smaller volume.

According to the embodiment of the present invention, as shown in fig. 2, the first flange 103 and the second flange 104 are disposed to be identical to each other and the identical end faces thereof are opposite to each other, i.e., the right end face of the first flange 103 and the left end face of the second flange 104 are identical to each other and are disposed to be opposite to each other in fig. 2, which is advantageous in reducing the design and manufacturing costs of the vibration damping module. Of course, this is merely an example, and the dual flange structure in the shock absorber of the present invention is not limited to the specific form depicted in fig. 1 and 2.

Although in the above-described embodiment, the shock absorber 100 is provided to have two flanges, alternatively, the shock absorber 100 may have only one flange or three flanges.

As described above, although the exemplary embodiments of the present invention have been described in the specification with reference to the accompanying drawings, the present invention is not limited to the above-described specific embodiments, and the scope of the present invention should be defined by the claims and their equivalents.

Claims

1. A vibration damping module includes a vibration damper (100) and a torque limiter (200),

the torque limiter (200) is used for transmitting torque not exceeding a predetermined torque between a power component and the shock absorber (100), and the shock absorber (100) is used for reducing torsional vibration,

it is characterized in that the method comprises the steps of,

the damper (100) comprises a first side plate (101) and a second side plate (102) fixed together, a damper spring and at least one flange located between the two side plates and rotating therewith about a common rotation axis;

the first side plate (101) is arranged on a side of the damper (100) close to the power member and a center accommodating portion (101A) is provided radially inside the first side plate (101), and an outer diameter of the center accommodating portion (101A) is larger than an outer diameter of a portion of a fixing member (500) for fixing a flywheel to the power member on the side of the damper (100) with respect to a rotation axis of the damper (100).

2. The vibration damping module according to claim 1, wherein the center receptacle (101A) of the first side plate (101) is configured to penetrate a center hole of the first side plate in an axial direction of the vibration damping module.

3. The vibration damping module according to claim 2, wherein the fixing element (500) is configured as a screw or a bolt, and the head of the screw or bolt faces the vibration damper, the head of the screw or bolt being at least partially accommodated in the central accommodation (101A) of the first side plate (101).

4. The vibration damping module according to claim 1, wherein the radially inner end of the first side plate (101) is further provided with a curved portion which is curved towards the power member, the curved portion being located radially outside the central receiving portion (101A).

5. The vibration damping module according to claim 4, wherein the bent portion overlaps at least a part of a portion of the fixing member (500) located at a side of the vibration damper (100) in an axial direction.

6. The vibration damping module according to any one of claims 1 to 5, wherein the torque limiter (200) comprises two friction plates (201A, 201B), a diaphragm spring (203) and a connecting plate (204) fixed to the flywheel (202),

the fixture (500) is used to secure the flywheel (202) to the power component and,

the torque limiter (200) further comprises a support plate (106) located between the first side plate (101) and the second side plate (102) and connected with the first side plate and the second side plate in a torsion-resistant manner, the diaphragm spring (203) is arranged between the first side plate (101) and the support plate (106) in a precompressed manner, and the two friction plates (201A, 201B) are respectively arranged between the support plate (106) and the connecting plate (204) and between the connecting plate (204) and the second side plate (102).

7. The vibration reduction module according to claim 6, wherein the flywheel (202) comprises a first flywheel portion (202A) and a second flywheel portion (202B) fixed together, the first flywheel (202A) portion being constructed in a sheet-like shape and being fixed to a power component via the fixing member (500), and the connection plate (204) being fixed to the second flywheel (202B) portion.

8. The vibration damping module according to claim 1, wherein the at least one flange is one flange, two flanges or three flanges.

9. Damping module according to claim 1 or 8, wherein the damper (100) comprises a first flange (103) and a second flange (104), the first flange (103) and the second flange (104) being provided with damping spring windows corresponding to the spring windows of the first side plate and the second side plate, the damping springs being accommodated in the spring windows and the damping spring windows, the first flange or the second flange being rotatably connected to the first side plate and the second side plate, optionally by means of pins, the first flange and the second flange being connected to the output hub (400) in a torsion-proof manner.

10. A power transmission system (10) includes an engine and a transmission,

it is characterized in that the method comprises the steps of,

a vibration damping module according to any one of claims 1 to 9 disposed between the engine and the transmission.