CN114483878A - Electric motor coach and torsion damping device thereof - Google Patents
Electric motor coach and torsion damping device thereof Download PDFInfo
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- CN114483878A CN114483878A CN202011254734.4A CN202011254734A CN114483878A CN 114483878 A CN114483878 A CN 114483878A CN 202011254734 A CN202011254734 A CN 202011254734A CN 114483878 A CN114483878 A CN 114483878A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/123—Wound springs
- F16F15/1232—Wound springs characterised by the spring mounting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/123—Wound springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/123—Wound springs
- F16F15/12353—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to an electric motor coach and a torsion damping device thereof. The torsion vibration damper comprises an outer rotating disc and an inner rotating disc, wherein the outer rotating disc comprises two coaxially and fixedly connected disc bodies, an outer disc connecting flange is arranged on at least one disc body, the inner rotating disc is clamped between the two disc bodies, spring windows with opposite positions are circumferentially arranged on the inner rotating disc and the outer rotating disc at intervals, a vibration damping spring is clamped in the spring windows, a connecting shaft extending out of the outer rotating disc is integrally arranged on the inner rotating disc, the connecting shaft is detachably and fixedly connected with an inner disc connecting flange, one of the inner disc connecting flange and the outer disc connecting flange is used for being connected with a power input flange, and the other one of the inner disc connecting flange and the outer disc connecting flange is used for being connected with a power output flange. The connecting structure between the inner rotating disc and the inner disc connecting flange can avoid the spline connection from generating larger impact on the torsion damping device and the power output flange, is beneficial to prolonging the service life of a power transmission system where the torsion damping device is positioned, and improves the driving comfort level of the electric motor coach.
Description
Technical Field
The invention relates to an electric motor coach and a torsion damping device thereof.
Background
At present, a scheme that a driving motor is connected with a speed reducer is generally adopted by a power transmission system of an electric motor coach. In order to avoid the large impact on the speed reducer caused by the steep increase of the output torque of the motor, a torsion damping device is arranged between the output shaft of the motor and the input shaft of the speed reducer.
The utility model discloses a torsional damper is disclosed in the utility model patent document with grant bulletin number CN203880009U, this torsional damper includes the driven disk of a coaxial interval arrangement and is located two driving discs between the driven disk, the axle center position department fixedly connected with of two driven disks is used for the spline hub of being connected with first transmission shaft, the edge protrusion of driving disc is two driven disc peripheries, in order to form the annular flange who is connected with the second transmission shaft, the top is equipped with one-level damping spring and the second grade damping spring that is used for preventing driving disc and driven disc relative rotation and mutual interval arrangement between driving disc and the driven disc, the energy of accumulating on through one-level damping spring and the second grade damping spring alleviates two transmission shafts vibration and impact at power transmission in-process, in order to reduce the fluctuation of the last power of reduction gear.
In the structure, the transmission shaft is used as a power input part or a power output part of the torsional vibration damper, one of the transmission shaft is arranged in the circumferential direction and connected with the torsional vibration damper through a flange, the other transmission shaft is arranged in the central position and connected with the torsional vibration damper through spline transmission, certain gaps are always formed in the spline connection position due to the consideration of processing precision, frequent starting and stopping are needed for an electric bus, particularly a pure electric bus, frequent impact can be generated in the starting and stopping process, and even if the vibration damping of the torsional vibration damper exists, the power input part or the power output part and the torsional vibration damper in the spline connection position can generate larger impact, so that the service life of a power transmission system is shortened, and the driving comfort of the bus is reduced.
Disclosure of Invention
The invention aims to provide a torsion damping device, which aims to solve the technical problem that the torsion damping device and a power input part or a power output part generate large impact because the torsion damping device adopts spline connection in the prior art; correspondingly, the invention also provides an electric motor coach to solve the technical problem that the torsional vibration damper in the prior art is connected by a spline to generate large impact, so that the driving comfort of the coach is reduced.
In order to achieve the purpose, the technical scheme of the torsion damping device is as follows: the torsional vibration damping device includes: the outer rotating disc comprises a first disc body and a second disc body which are coaxially and fixedly connected, and an outer disc connecting flange is arranged on the first disc body and/or the second disc body; the inner rotating disc and the outer rotating disc are coaxially arranged and clamped between the first disc body and the second disc body, and spring windows which are opposite in position in the axial direction are arranged at intervals in the circumferential direction of the inner rotating disc and the outer rotating disc; the damping spring is clamped in the spring window; the internal rotating disc comprises a disc body and a connecting shaft which is integrally arranged on the disc body and extends out of the external rotating disc, an internal disc connecting flange is detachably and fixedly connected to one end, far away from the disc body, of the connecting shaft, one of the internal disc connecting flange and the external disc connecting flange is used for being in transmission connection with the power input flange, and the other one of the internal disc connecting flange and the external disc connecting flange is used for being in transmission connection with the power output flange.
The invention has the beneficial effects that: the inner rotating disc is clamped between the two disc bodies of the outer rotating disc, the inner rotating disc is provided with a connecting shaft extending out of the outer rotating disc, an inner disc connecting flange is detachably and fixedly connected onto the connecting shaft, the inner disc connecting flange and the outer disc connecting flange arranged on the outer rotating disc are respectively connected with a power input flange and a power output flange of the torsion vibration damper, the power input flange or the power output flange can be prevented from being greatly impacted due to the adoption of spline connection, the service life of a power transmission system where the torsion vibration damper is located is prolonged, and the stability in the power transmission process is improved.
Furthermore, the inner disc connecting flange is sleeved on the connecting shaft, the connecting shaft is a stepped shaft which is in stop fit with the inner disc connecting flange in the circumferential direction, the stepped shaft is provided with a stepped surface which is in stop fit with the inner disc connecting flange, and a compression nut which compresses the inner disc connecting flange on the stepped surface is arranged at the end part of the stepped shaft. The detachable connection structure of the inner disc connecting flange and the inner rotating disc is simple and convenient to arrange.
Further, through the key-type connection in order to realize the cooperation of splining in week between step shaft and the inner disc flange, step shaft and inner disc flange's hookup location department all is equipped with the keyway of extending the arrangement along step shaft axis direction. The stepped shaft and the inner disk connecting flange are connected through a key, so that the impact of torque in the transmission process between the stepped shaft and the inner disk connecting flange can be better avoided, and the stability of torque transmission can be improved.
Further, damping fins are arranged between the first disc body and the inner rotating disc and between the second disc body and the inner rotating disc. The damping sheet can play a role in damping vibration attenuation in the power transmission process of the outer rotating disc and the inner rotating disc, so that the vibration amplitude in the torsion vibration attenuation device is attenuated, and the vibration impact in the torsion vibration attenuation device is further reduced.
Furthermore, a damping sheet spring window opposite to the vibration reduction spring in the axial direction is arranged on the damping sheet. The structure of the damping sheet with the damping sheet spring window can make the damping sheet relatively large in size, so that the contact area between the damping sheet and the corresponding outer rotating disc and between the damping sheet and the corresponding inner transmission can be increased, and the impact in the dynamic torsion vibration damping device is greatly attenuated.
In order to achieve the purpose, the technical scheme of the electric motor coach is as follows: [ electric ] motor coach, including motor, reduction gear and connect the torsional vibration damper between motor and reduction gear, still include the power input flange that is driven by the motor and with the power take off flange that the reduction gear transmission is connected, torsional vibration damper includes: the outer rotating disc comprises a first disc body and a second disc body which are coaxially and fixedly connected, and an outer disc connecting flange is arranged on the first disc body and/or the second disc body; the inner rotating disc and the outer rotating disc are coaxially arranged and clamped between the first disc body and the second disc body, and spring windows which are opposite in position in the axial direction are arranged at intervals in the circumferential direction of the inner rotating disc and the outer rotating disc; the damping spring is clamped in the spring window; the internal rotating disc comprises a disc body and a connecting shaft which is integrally arranged on the disc body and extends out of the external rotating disc, an internal disc connecting flange is detachably and fixedly connected to one end, far away from the disc body, of the connecting shaft, one of the internal disc connecting flange and the external disc connecting flange is used for being connected with a power input flange, and the other one of the internal disc connecting flange and the external disc connecting flange is used for being connected with a power output flange.
The beneficial effects of the invention are: in the torsion damping device of the electric motor coach, the inner rotating disc is clamped between the two disc bodies of the outer rotating disc, the inner rotating disc is provided with the connecting shaft extending out of the outer rotating disc, the connecting shaft is detachably and fixedly connected with the inner disc connecting flange, and the inner disc connecting flange and the outer disc connecting flange arranged on the outer rotating disc are respectively connected with the power input flange and the power output flange of the torsion damping device, so that the torsion damping device, the power input flange or the power output flange can be prevented from being greatly impacted by adopting spline connection, the service life of a power transmission system where the torsion damping device is arranged can be prolonged, the stability in the power transmission process can be improved, and the driving comfort of the electric motor coach can be improved.
Furthermore, the inner disc connecting flange is sleeved on the connecting shaft, the connecting shaft is a stepped shaft which is in stop fit with the inner disc connecting flange in the circumferential direction, the stepped shaft is provided with a stepped surface which is in stop fit with the inner disc connecting flange, and a compression nut which compresses the inner disc connecting flange on the stepped surface is arranged at the end part of the stepped shaft. The detachable connection structure of the inner disc connecting flange and the inner rotating disc is simple and convenient to arrange.
Further, through the key-type connection in order to realize the cooperation of splining in week between step shaft and the inner disc flange, step shaft and inner disc flange's hookup location department all is equipped with the keyway of extending the arrangement along step shaft axis direction. The stepped shaft and the inner disk connecting flange are connected through a key, so that the impact of torque in the transmission process between the stepped shaft and the inner disk connecting flange can be better avoided, and the stability of torque transmission can be improved.
Further, damping fins are arranged between the first disc body and the inner rotating disc and between the second disc body and the inner rotating disc. The damping sheet can play a role in damping vibration attenuation in the power transmission process of the outer rotating disc and the inner rotating disc, so that the vibration amplitude in the torsion vibration attenuation device is attenuated, and the vibration impact in the torsion vibration attenuation device is further reduced.
Furthermore, a damping sheet spring window opposite to the vibration reduction spring in the axial direction is arranged on the damping sheet. The structure of the damping sheet with the damping sheet spring window can make the damping sheet relatively large in size, so that the contact area between the damping sheet and the corresponding outer rotating disc and between the damping sheet and the corresponding inner transmission can be increased, and the impact in the dynamic torsion vibration damping device is greatly attenuated.
Drawings
Fig. 1 is a schematic structural view of a torsional vibration damper apparatus according to embodiment 1 of the present invention;
FIG. 2 is an assembled exploded view of the torsional vibration damper arrangement of FIG. 1;
FIG. 3 is a schematic structural diagram of the first tray of FIG. 1;
FIG. 4 is a structural diagram of the second tray of FIG. 1;
FIG. 5 is a schematic view of the inner rotatable disk of FIG. 1;
FIG. 6 is a schematic structural view of the inner disk connecting flange of FIG. 1;
FIG. 7 is a simplified schematic structural diagram of a powertrain system of embodiment 1 of the electric motor coach provided by the invention;
in the figure, 1-torsion damping device, 2-inner rotating disc, 3-first disc, 4-second disc, 5-through hole, 6-outer disc connecting flange, 7-first stage spring window, 8-second stage spring window, 9-first stage damping spring, 10-second stage damping spring, 11-window edge, 12-damping sheet, 13-damping sheet spring window, 14-connecting shaft, 15-inner disc connecting flange, 16-large diameter section, 17-middle diameter section, 18-small diameter section, 19-step surface, 20-compression nut, 21-gasket, 22-flat key, 23-key groove, 24-motor, 25-speed reducer and 26-transmission shaft.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Specific embodiments of the torsional vibration damping arrangement of the invention:
the torsion damping device in embodiment 1 is used for being disposed in an electric motor coach and between an electric motor and a speed reducer to reduce vibration shock during power transmission between the electric motor and the speed reducer.
As shown in fig. 1 and fig. 2, the torsional vibration damper includes an inner rotating disc 2 and an outer rotating disc, the outer rotating disc includes a first disc body 3 and a second disc body 4 coaxially arranged, through holes 5 are provided on the first disc body 3 and the second disc body 4, so as to realize the fixed connection of the two disc bodies through rivets, an outer disc connecting flange 6 is integrally provided on the first disc body 3, the outer disc connecting flange 6 is used for being fixedly connected with a power output flange of a motor, so as to realize the power input of the torsional vibration damper, the power output flange of the motor forms a power input flange of the torsional vibration damper, and the power input flange is used as a power input member of the torsional vibration damper.
As shown in fig. 2, the inner rotating disc 2 is located at a middle position between the first disc body 3 and the second disc body 4, and a notch for avoiding a rivet is provided at an edge position of the inner rotating disc 2, so as to achieve coaxial arrangement of the inner rotating disc 2 and the outer rotating disc.
In this embodiment, as shown in fig. 3, fig. 4 and fig. 5, spring windows arranged at intervals along the circumferential direction are respectively disposed on the two disc bodies of the outer rotating disc and the inner rotating disc 2, the spring windows on the first disc body 3, the second disc body 4 and the inner rotating disc 2 are correspondingly arranged in the axial direction of the inner rotating disc 2, and the sizes of the spring windows on the first disc body 3, the second disc body 4 and the inner rotating disc 2 corresponding to each other in the axial direction are the same. The spring windows of the inner rotating disc 2 are internally provided with damping springs in a clamped mode, each spring window comprises a second-stage spring window 8 with a large size and a first-stage spring window 7 with a small size, each damping spring comprises a first-stage damping spring 9 and a second-stage damping spring 10, the first-stage damping springs 9 are arranged in the first-stage spring windows 7 of the inner rotating disc 2 in a clamped mode, and the second-stage damping springs 10 are arranged in the second-stage spring windows 8 of the inner rotating disc 2 in a clamped mode. Window blocking edges 11 used for limiting the damping springs to be separated from the spring windows of the inner rotating disc 2 are arranged on the two sides of the spring windows of the first disc body 3 and the second disc body 4 corresponding to the axes of the damping springs.
In this embodiment, as shown in fig. 2, the stiffness of the first-stage damping spring 9 is smaller than that of the second-stage damping spring 10, the first-stage damping spring 9 is compressed in the first-stage spring window 7 of the inner rotary disk 2 in the axial direction thereof, and a gap is left between the second-stage damping spring 10 and the second-stage spring window 8 of the inner rotary disk 2 in the axial direction thereof, so as to ensure that the outer rotary disk can rotate relative to the inner rotary disk 2 by a corresponding angle in the circumferential direction. The arrangement of the first-stage damping spring 9 and the second-stage damping spring 10 can ensure torque transmission between the outer rotating disc and the inner rotating disc 2, reduce torque vibration impact and improve stability in the torque transmission process.
In this embodiment, as shown in fig. 2, damping fins 12 are installed between the first disk body 3 and the inner rotating disk 2 and between the second disk body 4 and the inner rotating disk 2, the damping fins 12 are circular, and the damping fins 12 are coaxially arranged with the inner rotating disk 2, and the damping fins 12 can play a role in damping vibration in a process that the outer rotating disk drives the inner rotating disk 2 to rotate, so as to attenuate the vibration amplitude in the torsion reduction apparatus and further reduce the vibration impact in the torsion reduction apparatus.
Further, as shown in fig. 2, the outer edge of the damping fin 12 is provided with a notch to avoid the rivet on the outer rotating disc, and the area of the damping fin 12 can be maximized, so that the contact area and the friction force between the damping fin 12 and the inner rotating disc 2 and between the damping fin 12 and the outer rotating disc can be increased in the process that the outer rotating disc drives the inner rotating disc 2 to rotate, and the impact in the dynamic torque damping process can be greatly attenuated. The damping fin 12 is provided with a damping fin spring window 13 corresponding to the position of the damping spring in the axial direction of the damping fin 12, and the size of the damping fin spring window 13 is larger than that of the corresponding spring window on the inner rotating disc 2 so as to avoid the damping spring arranged in the spring window of the inner rotating disc 2.
In this embodiment, as shown in fig. 1 and 5, the inner rotating disc 2 is provided with a connecting shaft 14 extending toward the second disc body 4 at an axial center position thereof, the connecting shaft 14 penetrates through the second disc body 4, and an inner disc connecting flange 15 is detachably and fixedly connected to the connecting shaft 14, the inner disc connecting flange 15 is used for being fixedly connected to an end flange of a transmission shaft connected to a speed reducer, so as to implement power output of the torsional vibration damper, and the end flange forms a power output flange of the torsional vibration damper and serves as a power output member of the torsional vibration damper.
In this embodiment, as shown in fig. 1 and 5, the connecting shaft 14 is a stepped shaft, the stepped shaft has a large diameter section 16, a medium diameter section 17 and a small diameter section 18, a stepped surface 19 is provided between the large diameter section 16 and the medium diameter section 17, the small diameter section 18 of the stepped shaft has an external thread, the small diameter section 18 is provided with a gasket 21 and a compression nut 20 for compressing the inner disc connecting flange 15 on the stepped surface 19, and the compression nut 20 can prevent the inner disc connecting flange 15 from coming off from the connecting shaft 14 in the axial direction.
As shown in fig. 2, the connecting shaft 14 is in rotation-stopping fit with the inner disk connecting flange 15 through key connection in the circumferential direction, key slots 23 extending along the axial direction of the stepped shaft are respectively arranged on the intermediate diameter section 17 and the inner disk connecting flange 15, flat keys 22 are arranged in the key slots 23, and the flat keys 22 are in interference fit with the key slots 23 so as to avoid impact or collision generated in the process that the inner rotating disk 2 drives the inner disk connecting flange 15 to rotate. The key connection has simple structure, and can better avoid the impact of the torque in the transmission process between the stepped shaft and the inner disk connecting flange 15 so as to improve the stability of torque transmission.
In this embodiment, the outer rotating disc is fixedly connected with the power input flange through the outer disc connecting flange 6, the connecting shaft 14 integrally extends out of the inner rotating disc 2, and the inner disc connecting flange 15 detachably fixed on the connecting shaft 14 is used for fixedly connecting the inner rotating disc with the power output flange.
it differs from example 1 in that: and a semi-circular key or a wedge key or a tangential key is arranged in the key groove of the middle-diameter section so as to realize key connection of the connecting shaft and the inner disc connecting flange, and further realize the rotation stopping matching of the connecting shaft and the inner disc connecting flange in the circumferential direction. The structure of the key connection can better avoid the impact of the torque in the transmission process between the connecting shaft and the inner disk connecting flange, and further improve the stability of torque transmission.
it differs from example 1 in that: the connecting shaft is a stepped shaft, the stepped shaft comprises a large-diameter section, a middle-diameter section and a small-diameter section, the section of the middle-diameter section is triangular, quadrangular or pentagonal and the like, the shape of a central hole of an inner disc connecting flange is the same as that of the section of the middle-diameter section, the inner disc connecting flange is sleeved on the middle-diameter section and is in interference fit with the middle-diameter section so as to realize the rotation-stopping fit of the inner disc connecting flange and the connecting shaft in the circumferential direction, the thickness of the inner disc connecting flange is larger than that of the middle-diameter section, the small-diameter section is provided with external threads, the small-diameter section is also provided with a gasket and a gland nut which tightly press the inner disc connecting flange on a step surface, the gland nut can prevent the inner disc connecting flange from coming off from the connecting shaft in the axial direction, the connecting structure can also realize the detachable fixed connection of the connecting shaft and the connecting shaft, and can better avoid the torsion damping device and the power output flange from generating larger impact to influence on the service life of the torsion damping device and the transmission shaft in the power transmission process, the service life of a power transmission system where the torsion vibration damper is located is prolonged, the stability in the power transmission process is improved, and the driving comfort level of the electric motor coach is further improved.
Example 4 of the torsional vibration damper of the present invention:
it differs from example 1 in that: the inner disc connecting flange is connected with the detachable fixed connection of the shaft end of the connecting shaft through the bolt, and the connecting structure can also avoid generating large impact on the power output flange and the torsion vibration damper in the power transmission process, so that the driving comfort level of the electric passenger car is improved.
Example 5 of the torsional vibration damper of the present invention:
it differs from example 1 in that: damping fins are not arranged between the first disc body and the inner rotating disc and between the second disc body and the inner rotating disc, and only damping springs arranged in spring windows on the inner rotating disc are used for reducing vibration impact in the torque transmission process of the outer rotating disc and the inner rotating disc and improving the stability in the torque transmission process; or damping fins are arranged between the first disc body and the inner rotating disc and between the second disc body and the inner rotating disc, and the outer diameter of each damping fin is smaller than that of each damping fin, so that the damping fins are completely separated from the springs on the inner rotating disc, and the stability of the torque transmission process in the power transmission system is further improved through the damping fins.
Example 6 of the torsional vibration damper of the present invention:
it differs from example 1 in that: the inner disc connecting flange is used for being fixedly connected with the power output flange of the motor, the outer disc connecting flange is used for being fixedly connected with the end flange of the transmission shaft, vibration and impact in a power transmission system can be reduced by the connecting mode, the service life of the power input flange and the torque vibration damper can be prolonged, and the driving comfort degree of the electric motor coach is improved.
Example 7 of the torsional vibration damper of the present invention:
it differs from example 1 in that: an outer disc connecting flange connected with the second disc body is integrally arranged on the second disc body of the outer rotating disc and is used for being fixedly connected with a power output flange of the motor so as to realize power input of the torsion vibration damping device; or the first tray body and the second tray body are respectively provided with an outer tray connecting flange connected with the corresponding tray body, and the two outer tray connecting flanges are fixedly connected with the power output flange of the motor.
it differs from example 1 in that: the torsion damping device can also be used between other power output parts and power receiving parts for transmitting torque, and realizes stable and smooth transmission of power by damping impact and vibration in the torque transmission process.
The specific embodiment of the electric motor coach of the invention comprises the following steps:
as shown in fig. 7, in embodiment 1, the electric motor coach includes a frame and a power transmission system fixed on the frame, and the power transmission system includes an electric motor 24 and a speed reducer 25 in transmission connection with the electric motor 24 through a transmission shaft 26.
As shown in fig. 7, the torsional vibration damper apparatus 1 is connected in transmission between the electric motor 24 and the reduction gear 25 in order to reduce vibration shock during power transmission between the electric motor 24 and the reduction gear 25 and reduce power fluctuation in the reduction gear 25. Specifically, a motor power output flange is connected to the motor 24, the torsional vibration damper 1 is fixedly connected to the motor power output flange to realize power input of the torsional vibration damper 1, the motor power output flange is used as a power input flange of the torsional vibration damper, i.e., a power input member, the transmission shaft 26 is provided with an end flange, the torsional vibration damper 1 is fixedly connected to the end flange of the transmission shaft to realize power output of the torsional vibration damper, and the end flange of the transmission shaft is used as a power output flange of the torsional vibration damper, i.e., a power output member, to realize fixed connection with the torsional vibration damper.
In this embodiment, the structure of the torsional vibration damper apparatus 1 is the same as that of the torsional vibration damper apparatus in embodiment 1 of the torsional vibration damper apparatus described above, and details thereof are omitted.
In other embodiments, the structure of the torsion damping device of the electric motor coach is the same as that of the torsion damping device in embodiments 2 to 8 of the above-described torsion damping device, and the details are not repeated here.
Claims (10)
1. A torsional vibration damping device comprising:
the outer rotating disc comprises a first disc body and a second disc body which are coaxially and fixedly connected, and an outer disc connecting flange is arranged on the first disc body and/or the second disc body;
the inner rotating disc and the outer rotating disc are coaxially arranged and clamped between the first disc body and the second disc body, and spring windows which are opposite in position in the axial direction are arranged at intervals in the circumferential direction of the inner rotating disc and the outer rotating disc;
the damping spring is clamped in the spring window;
the internal rotating disc comprises a disc body and a connecting shaft which is integrally arranged on the disc body and extends out of the external rotating disc, an internal disc connecting flange is detachably and fixedly connected to one end, far away from the disc body, of the connecting shaft, one of the internal disc connecting flange and the external disc connecting flange is used for being connected with a power input flange, and the other one of the internal disc connecting flange and the external disc connecting flange is used for being connected with a power output flange.
2. The torsional vibration damper of claim 1, wherein the inner disk connecting flange is fitted over the connecting shaft, and the connecting shaft is a stepped shaft which is fit in rotation with the inner disk connecting flange in the circumferential direction, the stepped shaft having a stepped surface which is fit in a stopper manner with the inner disk connecting flange, and an end of the stepped shaft is provided with a pressing nut which presses the inner disk connecting flange against the stepped surface.
3. The torsional vibration damper of claim 2, wherein the stepped shaft and the inner disk connecting flange are connected by a key to realize a rotation-stopping fit in the circumferential direction, and a key groove extending along the axial direction of the stepped shaft is formed at each connecting position of the stepped shaft and the inner disk connecting flange.
4. The torsional vibration damping device according to any of claims 1 to 3, wherein damping fins are provided between the first disk body and the inner rotatable disk and between the second disk body and the inner rotatable disk.
5. The torsional vibration damper of claim 4, wherein the damper blade is provided with a damper blade spring window axially opposed to the damper spring.
6. The utility model provides an electric motor coach, includes motor, reduction gear and connects the torsional vibration damper between motor and reduction gear, still includes the power input flange that is driven by the motor and the power take off flange who is connected with the reduction gear transmission, its characterized in that, torsional vibration damper includes:
the outer rotating disc comprises a first disc body and a second disc body which are coaxially and fixedly connected, and an outer disc connecting flange is arranged on the first disc body and/or the second disc body;
the inner rotating disc and the outer rotating disc are coaxially arranged and clamped between the first disc body and the second disc body, and spring windows which are opposite in position in the axial direction are arranged at intervals in the circumferential direction of the inner rotating disc and the outer rotating disc;
the damping spring is clamped in the spring window;
the internal rotating disc comprises a disc body and a connecting shaft which is integrally arranged on the disc body and extends out of the external rotating disc, an internal disc connecting flange is detachably and fixedly connected to one end, far away from the disc body, of the connecting shaft, one of the internal disc connecting flange and the external disc connecting flange is used for being connected with a power input flange, and the other one of the internal disc connecting flange and the external disc connecting flange is used for being connected with a power output flange.
7. The electric motor coach as claimed in claim 6, wherein the inner disc connecting flange is fitted over the connecting shaft, and the connecting shaft is a stepped shaft which is fit in rotation with the inner disc connecting flange in a circumferential direction, the stepped shaft having a stepped surface which is fit in a stopper manner with the inner disc connecting flange, and a pressing nut which presses the inner disc connecting flange against the stepped surface is provided at an end of the stepped shaft.
8. The electric motor coach as claimed in claim 7, wherein the stepped shaft and the inner disk connecting flange are connected through a key to achieve rotation stopping fit in the circumferential direction, and key grooves extending along the axial direction of the stepped shaft are formed in the positions where the stepped shaft and the inner disk connecting flange are connected.
9. The electric motor coach as claimed in any one of claims 6 to 8, wherein damping fins are provided between the first tray body and the inner rotating tray and between the second tray body and the inner rotating tray.
10. The electric motor coach as claimed in claim 9, wherein the damper blade is provided with a damper blade spring window which is axially opposed to the damper spring.
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| CN202011254734.4A CN114483878B (en) | 2020-11-11 | 2020-11-11 | Electric motor coach and torsion damping device thereof |
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| CN202011254734.4A CN114483878B (en) | 2020-11-11 | 2020-11-11 | Electric motor coach and torsion damping device thereof |
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| CN114483878A true CN114483878A (en) | 2022-05-13 |
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| CN114483878B (en) | 2023-08-01 |
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Address after: No. 6, Yutong Road, Guancheng Hui District, Zhengzhou, Henan 450061 Applicant after: Yutong Bus Co.,Ltd. Address before: No.1, Shibali Heyu Road, Guancheng Hui District, Zhengzhou City, Henan Province Applicant before: ZHENGZHOU YUTONG BUS Co.,Ltd. |
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