CN216842893U

CN216842893U - Double-mass flywheel with overload protection function and vehicle

Info

Publication number: CN216842893U
Application number: CN202121415707.0U
Authority: CN
Inventors: 刘增岗
Original assignee: Changzhou Shujia Machinery Co ltd
Current assignee: Changzhou Shujia Machinery Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-06-28
Anticipated expiration: 2031-06-24

Abstract

A dual mass flywheel with overload protection function comprises a first mass and a second mass; the first mass comprises a flywheel provided with an axial boss and a gear ring; the second mass comprises a mandrel with a radial boss and a flange; the first mass and the second mass transmit torque through the elastic unit; the elastic unit comprises a first scroll spring and a second scroll spring; the first scroll spring and the second scroll spring are connected with the first mass and the second mass; the elastic unit also comprises an inner pad, an outer pad and an elastic piece; the inner pad and the outer pad are provided with first ends and second ends of a first scroll spring and a second scroll spring; the elastic member is disposed between the laps of the spiral spring.

Description

Double-mass flywheel with overload protection function and vehicle

Technical Field

The utility model relates to a spare part of vehicle and use vehicle of this spare part, in particular to double mass flywheel and vehicle with overload protection function.

Background

A Dual Mass Flywheel (DMF) is a mechanical structure applied in an automobile power transmission system for isolating torsional vibration of an engine crankshaft. Under the condition that all parameters of the dual-mass flywheel are determined, the frequency of first-order torsional vibration resonance of the engine can be adjusted to be lower than the idle speed of the engine, and vibration, noise and instability caused in the whole working rotating speed range are avoided. And the effects of saving oil, reducing consumption and improving the reliability of the power transmission system of the automobile can be achieved.

The inventor provides the technical scheme in chinese patent No. 202110015123.2 to achieve the above function, but under special limit conditions, the power transmission system may be overloaded seriously, so that the reliability of the vehicle is reduced.

In view of this, the utility model provides a dual mass flywheel with overload protection function overcomes under the extreme overload operating mode and the overlength service condition, dual mass flywheel low in reliability's shortcoming.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dual mass flywheel with overload protection function can guarantee the normal work of dual mass flywheel under the extreme overload operating mode and under the overlength service condition.

In order to achieve the above object of the present invention, the present invention discloses a dual mass flywheel with overload protection function, comprising a first mass and a second mass; the first mass comprises a gear ring and a flywheel provided with an axial boss; the second mass comprises a flange and a mandrel provided with a radial boss; the axial bosses of the flywheel and the radial bosses of the mandrel are arranged in a staggered manner, and torque is transmitted between the first mass and the second mass through the elastic unit; the elastic unit comprises a first scroll spring and a second scroll spring, one end of the first scroll spring and one end of the second scroll spring are connected with the first mass at the same time, and the other end of the first scroll spring and the other end of the second scroll spring are connected with the second mass at the same time.

Still further, the elastic unit further includes an inner pad and an outer pad disposed at the first and second ends of the first and second spiral springs, respectively.

Further, the inner and outer pads radially restrain the first and second scroll springs.

Still further, the elastic unit further includes elastic members uniformly arranged between the laps of the first and second scroll springs.

Furthermore, a relative rotation angle space is reserved between the axial boss and the radial boss.

Further, the first and second scroll springs are disposed coaxially with the first and second masses.

Further, the first and second scroll springs may be wound in the same or opposite directions.

The utility model discloses still disclose a vehicle, its characterized in that, this vehicle include power transmission system, and this power transmission system includes the above dual mass flywheel.

The utility model provides a dual mass flywheel can reduce the produced NVH of engine crankshaft, starter motor and gearbox transmission axle effectively to also can make dual mass flywheel normally work under overload operating condition.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

FIG. 1 is a cross-sectional view of a dual mass flywheel in accordance with a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of a dual mass flywheel in accordance with a preferred embodiment of the present invention;

FIG. 3 is an exploded view of a dual mass flywheel in accordance with a preferred embodiment of the present invention;

FIG. 4 is a cross-sectional view of a preferred embodiment of the flywheel of the present invention;

FIG. 5 is a cross-sectional view of a mandrel in accordance with a preferred embodiment of the present invention;

fig. 6 is a graph showing the stiffness curve and the overload protection diagram of the dual mass flywheel of the present invention.

In the figure:

01-flywheel; 02-mandrel; 03-end cap; 04-large bearing;

05-first volute spiral spring; 05 a-second scroll spring;

06-first elastic pad; 06 a-second elastic pad;

07-first gasket; 07 a-second gasket;

08-first inside pad; 08 a-second inner pad;

09-first outer pad; 09 a-second outboard pad;

10-thrust ring; 11-screw; 12-inner pin; 13-outer pin;

14-small bearing; 15-gear ring;

101-axial boss; 102-flywheel groove;

201-radial boss; 202-mandrel recess;

501-outer hanging feet; 502-inner hanger.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for purposes of illustration only and do not denote a single embodiment. The terms "outer" and "outboard" as used herein generally refer to a location away from the axis of the drive shaft, and "inner" and "inboard" generally refer to a location near the axis of the drive shaft. "axial" refers to the direction in which the drive shaft axis extends, and "radial" refers to the direction perpendicular to the drive shaft axis.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present invention, the terms "first" and "second" do not denote any particular quantity or order, but are merely used to distinguish names. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

An object of the utility model is to provide a dual mass flywheel solves current dual mass flywheel under the extreme overload operating mode and under the overlength service condition, guarantees dual mass flywheel's normal work.

In order to realize the aim of the utility model, the utility model provides a double-mass flywheel with overload protection function, which comprises a first mass and a second mass which are coaxially arranged; the first mass comprises a flywheel and a gear ring, and the right end face of the flywheel is provided with an axial boss; the second mass comprises a mandrel and a flange, and a radial boss is arranged on the outer surface of the mandrel; the axial bosses of the flywheel and the radial bosses of the mandrel are arranged in a staggered manner and have a certain angle space; the first mass and the second mass transmit torque through an elastic unit, the elastic unit comprises a first scroll spring, a second scroll spring, an inner side pad, an outer side pad and an elastic piece, the first scroll spring and the second scroll spring are coaxially arranged with the first mass and the second mass, the first ends of the first scroll spring and the second scroll spring are combined with the second mass, and the second ends of the first scroll spring and the second scroll spring are combined with the first mass; the inner pad and the outer pad radially limit the first and second volute springs; the elastic member is disposed between the laps of the first and second spiral springs.

The present invention will be described in detail below with reference to the drawings and examples, and typical examples and illustrations will be given for the sake of understanding in the course of description, but the examples and illustrations are not the only way in which the present invention can be implemented.

Fig. 1 is a view of a dual mass flywheel according to a first preferred embodiment of the present invention. As shown in fig. 1, the dual mass flywheel includes a first mass (including the flywheel 01, the ring gear 15, the inner race of the large bearing 04, and the outer race of the small bearing 14) and a second mass (including the spindle 02, the screw 11, the inner pin 12, the outer pin 13, and the outer race of the large bearing 04). The first mass is coaxially connected with the crankshaft of the engine, and in view of the utility model discloses in the equal coaxial coupling of a plurality of parts, for the sake of simple explanation, will refer to the axis of dual mass flywheel with the axis of the crankshaft of engine. First quality and second quality are connected through first spiral spring 05 between, and the one end and the first quality of first spiral spring 05 combine, and the other end and the second quality combine, absorb vibration through elastic deformation. In this embodiment, the utility model has been described in chinese patent No. 202110015123.2, and the utility model is not repeated.

In a preferred version, as shown in fig. 1, the flywheel 01 includes at least one axial boss 101 and the spindle 02 includes at least one radial boss 201. The axial bosses 101 of the flywheel 01 and the radial bosses 201 of the mandrel 02 are arranged in a staggered manner, and have a certain angle space alpha. Therefore, under the extreme overload working condition and the overlong service condition, even under the condition that the volute spiral spring fails, the dual-mass flywheel can normally transmit torque, and the reliability of the dual-mass flywheel is ensured.

Fig. 2 is an overall view of a dual mass flywheel in accordance with a preferred embodiment of the present invention.

Fig. 3 is an exploded view and a schematic diagram of a torque transmission path of a dual mass flywheel according to a preferred embodiment of the present invention. The following describes an embodiment of the present invention in detail with reference to fig. 1, 2 and 3. As shown in fig. 3, when the engine is started, the gear ring 15 transmits torque to the flywheel 01, then the flywheel groove 102 transmits the torque to the inner hanging leg 502 of the spring, and then to the outer hanging leg 501, the outer hanging leg 502 transmits to the mandrel groove 202, and the mandrel 02 transmits the torque to the end cover 03.

Under the overload working condition, when the deformation angle of the first spiral spring 05 reaches alpha, the axial boss 101 of the flywheel 01 is contacted with the radial boss 201 of the mandrel 02 to form a new torque transmission path, so that the transmission torque passing through the first spiral spring 05 is not increased, and the effect of protecting the first spiral spring 05 is achieved.

In fig. 3, in addition to a first elastic system consisting of a first spiral spring 05, a first elastic pad 06, a first gasket 07, a first inner pad 08 and a first outer pad 09, there is a set of second elastic system connected in parallel with the first elastic system, consisting of a second spiral spring 05a, a second elastic pad 06a, a second gasket 07a, a second inner pad 08a and a second outer pad 09 a. The first elastic system and the second elastic system work in parallel, and the reliability of the dual-mass flywheel is improved. The first spiral spring 05 and the second spiral spring 05a are wound in the same direction or in opposite directions, so that the performance balance of the dual-mass flywheel during loading and unloading is improved.

Fig. 4 is a view of the flywheel of the preferred embodiment of the present invention, wherein the recess 102 is engaged with the inner leg 502 of the first spiral spring 05.

Fig. 5 is a view of the mandrel of the preferred embodiment of the present invention, wherein the groove 202 is engaged with the inner leg 501 of the first spiral spring 05.

Fig. 6 is a graph of stiffness curve and overload protection position of the dual mass flywheel of the preferred embodiment of the present invention. The stiffness graph is a variable stiffness curve, and the greater the torque, the greater the stiffness. When the load is lower, the rigidity is small, the deformation is large, and the wave energy can be absorbed; when the load is higher, the rigidity is large, the deformation is small, and the damping device is suitable for high-frequency damping. It follows that the dual mass flywheel is particularly suitable for high power vehicles. Under the overload working condition, when the deformation angle of the spring 05 reaches alpha, the axial boss 101 of the flywheel 01 is in contact with the radial boss of the mandrel 02 to form a torque transmission path connected with the spring in parallel, so that the effect of protecting the spring is achieved, and the reliability of the dual-mass flywheel is improved.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. A dual mass flywheel with overload protection function is characterized by comprising a first mass and a second mass; the first mass comprises a gear ring and a flywheel provided with an axial boss; the second mass comprises a flange and a mandrel provided with a radial boss; the axial bosses of the flywheel and the radial bosses of the mandrel are arranged in a staggered manner, and torque is transmitted between the first mass and the second mass through the elastic unit; the elastic unit comprises a first scroll spring and a second scroll spring, one end of the first scroll spring and one end of the second scroll spring are connected with the first mass at the same time, and the other end of the first scroll spring and the other end of the second scroll spring are connected with the second mass at the same time.

2. A twin mass flywheel as defined in claim 1 in which said resilient unit further comprises inner and outer pads disposed at first and second ends of the first and second scroll springs, respectively.

3. A twin mass flywheel as defined in claim 2 in which said inboard and outboard pads radially confine the first and second wrap springs.

4. A twin mass flywheel as defined in claim 1 in which said resilient unit further comprises resilient members disposed evenly between the wraps of the first and second spiral springs.

5. A twin mass flywheel as defined in claim 1 in which there is angular space for relative rotation between the axial and radial bosses.

6. A twin mass flywheel as defined in claim 1 in which said first and second wrap springs are disposed coaxially with the first and second masses.

7. A twin mass flywheel as defined in claim 1 in which the first and second scroll springs are wound in the same or opposite directions.

8. A vehicle comprising a driveline comprising a dual mass flywheel as claimed in any one of claims 1 to 7.