CN114483878B - Electric motor coach and torsion damping device thereof - Google Patents
Electric motor coach and torsion damping device thereof Download PDFInfo
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- CN114483878B CN114483878B CN202011254734.4A CN202011254734A CN114483878B CN 114483878 B CN114483878 B CN 114483878B CN 202011254734 A CN202011254734 A CN 202011254734A CN 114483878 B CN114483878 B CN 114483878B
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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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- Engineering & Computer Science (AREA)
- 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 utility model relates to an electric motor coach and a torsion damping device thereof. The torsional vibration damper comprises an outer rotating disc and an inner rotating disc, wherein the outer rotating disc comprises two disc bodies which are fixedly connected coaxially, 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 arranged at intervals in the circumferential direction of the inner rotating disc and the outer rotating disc, vibration damping springs are clamped in the spring windows, a connecting shaft extending out of the outer rotating disc is integrally arranged on the inner rotating disc, an inner disc connecting flange is detachably and fixedly connected to the connecting shaft, one of the inner disc connecting flange and the outer disc connecting flange is connected with a power input flange, and the other one of the inner disc connecting flange and the outer disc connecting flange is connected with a power output flange. The connection structure between the inner rotating disc and the inner disc connecting flange can avoid larger impact on the torsion damping device and the power output flange due to spline connection, thereby being beneficial to prolonging the service life of a power transmission system where the torsion damping device is positioned and improving the driving comfort level of the electric motor coach.
Description
Technical Field
The utility model 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 commonly adopted in a power transmission system of an electric motor coach. In order to avoid the large impact of the steep increase of the motor output torque on the speed reducer, a torsional vibration damper is arranged between the motor output shaft and the input shaft of the speed reducer.
The utility model patent document with the publication number of CN203880009U discloses a torsional vibration damper, which comprises a driven disc and a driving disc, wherein the driven discs are coaxially arranged at intervals, the driving disc is positioned between the two driven discs, spline hubs used for being connected with a first transmission shaft are fixedly connected at the axle center positions of the two driven discs, the edges of the driving disc protrude out of the peripheries of the two driven discs to form an annular flange connected with a second transmission shaft, a primary vibration damping spring and a secondary vibration damping spring which are used for preventing the driving disc and the driven disc from rotating relatively and are arranged at intervals are arranged between the driving disc and the driven disc in a propping mode, and vibration and impact of the two transmission shafts in the power transmission process are relieved through energy accumulated on the primary vibration damping spring and the secondary vibration damping spring, so that fluctuation of power on the speed reducer is reduced.
In the structure, the transmission shaft is used as a power input part or a power output part of the torsional damper, one of the transmission shafts is connected with the torsional damper in the circumferential direction through a flange, the other transmission shaft is connected with the torsional damper in the center position through spline transmission, certain gaps are often formed at spline connection positions, and for electric buses, particularly pure electric buses, frequent start and stop are required, frequent impact can be generated in the start and stop process, even if vibration reduction of the torsional damper exists, the power input part or the power output part at the spline connection positions and the torsional damper can generate larger impact, so that the service life of a power transmission system is shortened, and the driving comfort of the buses is reduced.
Disclosure of Invention
The utility model aims to provide a torsional vibration damper to solve the technical problem that the torsional vibration damper and a power input piece or a power output piece generate larger impact due to the fact that the torsional vibration damper is connected through a spline in the prior art; the utility model also provides an electric motor coach, which solves the technical problem that the prior torsion damping device adopts spline connection to generate larger impact, thereby reducing the driving comfort of the coach.
In order to achieve the above purpose, the technical scheme of the torsional vibration damper of the utility model is as follows: the 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 axial position are arranged on the inner rotating disc and the outer rotating disc at intervals in the circumferential direction; the damping spring is clamped in the spring window; the inner rotating disc comprises a disc body and a connecting shaft which is integrally arranged on the disc body and extends out of the outer rotating disc, one end of the connecting shaft, far away from the disc body, 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 in transmission connection with the power input flange, and the other end of the inner disc connecting flange and the outer disc connecting flange is used for being in transmission connection with the power output flange.
The beneficial effects of the utility model are as follows: 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, 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 torsional vibration damper, and the torque vibration damper, the power input flange or the power output flange can be prevented from being impacted greatly by spline connection, so that the service life of a power transmission system where the torsional vibration damper is positioned is prolonged, and the stability in the power transmission process is improved.
Further, 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 step surface which is in stop fit with the inner disc connecting flange, and the end part of the stepped shaft is provided with a compression nut which compresses the inner disc connecting flange on the step surface. The detachable connection structure of the inner disc connecting flange and the inner disc is simple and convenient to arrange.
Further, the stepped shaft is connected with the inner disc connecting flange through a key to realize rotation stopping fit in the circumferential direction, and key grooves extending and arranged along the axial direction of the stepped shaft are formed in the connecting positions of the stepped shaft and the inner disc connecting flange. The stepped shaft and the inner disc connecting flange are connected through keys, so that the impact of torque in the transmission process between the stepped shaft and the inner disc connecting flange can be well avoided, and the stability of torque transmission can be improved.
Further, damping sheets 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 fin can play a damping vibration attenuation role in the power transmission process of the outer rotating disc and the inner rotating disc, so that the vibration amplitude in the torsional vibration damper is attenuated, and the vibration impact in the torsional vibration damper is further reduced.
Further, the damping fin is provided with a damping fin spring window which is opposite to the damping spring in the axial direction. The damping fin is provided with the damping fin spring window, so that the size of the damping fin is relatively large, the contact area between the damping fin and the corresponding outer rotating disc and the inner transmission can be increased, and the impact in the dynamic torsion damping device is greatly damped.
In order to achieve the above purpose, the technical scheme of the electric motor coach is as follows: the utility model provides an [ electric ] motor coach, includes motor, reduction gear and connects the torsion damping device between motor and reduction gear, still includes the power input flange that is driven by the motor and is connected with the transmission of reduction gear power output flange, torsion 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 axial position are arranged on the inner rotating disc and the outer rotating disc at intervals in the circumferential direction; the damping spring is clamped in the spring window; the inner rotating disc comprises a disc body and a connecting shaft which is integrally arranged on the disc body and extends out of the outer rotating disc, one end of the connecting shaft, far away from the disc body, 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 end of the inner disc connecting flange and the outer disc connecting flange is used for being connected with a power output flange.
The beneficial effects of the utility model are as follows: in the torsion vibration damper 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, the inner disc connecting flange is connected with the outer disc connecting flange arranged on the outer rotating disc respectively to realize the connection with the power input flange and the power output flange of the torsion vibration damper, so that the torsion vibration damper, the power input flange or the power output flange can be prevented from generating larger impact by adopting spline connection, the service life of a power transmission system where the torsion vibration damper is positioned is prolonged, the stability in the power transmission process is improved, and the driving comfort of the electric motor coach is improved.
Further, 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 step surface which is in stop fit with the inner disc connecting flange, and the end part of the stepped shaft is provided with a compression nut which compresses the inner disc connecting flange on the step surface. The detachable connection structure of the inner disc connecting flange and the inner disc is simple and convenient to arrange.
Further, the stepped shaft is connected with the inner disc connecting flange through a key to realize rotation stopping fit in the circumferential direction, and key grooves extending and arranged along the axial direction of the stepped shaft are formed in the connecting positions of the stepped shaft and the inner disc connecting flange. The stepped shaft and the inner disc connecting flange are connected through keys, so that the impact of torque in the transmission process between the stepped shaft and the inner disc connecting flange can be well avoided, and the stability of torque transmission can be improved.
Further, damping sheets 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 fin can play a damping vibration attenuation role in the power transmission process of the outer rotating disc and the inner rotating disc, so that the vibration amplitude in the torsional vibration damper is attenuated, and the vibration impact in the torsional vibration damper is further reduced.
Further, the damping fin is provided with a damping fin spring window which is opposite to the damping spring in the axial direction. The damping fin is provided with the damping fin spring window, so that the size of the damping fin is relatively large, the contact area between the damping fin and the corresponding outer rotating disc and the inner transmission can be increased, and the impact in the dynamic torsion damping device is greatly damped.
Drawings
FIG. 1 is a schematic view of a torsional vibration damper of embodiment 1;
FIG. 2 is a schematic view of an assembled and disassembled structure of the torsional vibration damper arrangement of FIG. 1;
FIG. 3 is a schematic view of the first tray of FIG. 1;
FIG. 4 is a schematic diagram of the structure of the second tray in FIG. 1;
FIG. 5 is a schematic view of the structure of the rotating disk of FIG. 1;
FIG. 6 is a schematic view of the inner disc connection flange of FIG. 1;
fig. 7 is a simplified schematic structural diagram of a power transmission system in embodiment 1 of an electric motor coach provided by the utility model;
in the figure, the 1-torsional vibration damper, the 2-inner rotating disc, the 3-first disc, the 4-second disc, the 5-through hole, the 6-outer disc connecting flange, the 7-primary spring window, the 8-secondary spring window, the 9-primary vibration damper, the 10-secondary vibration damper, the 11-window blocking edge, the 12-damping sheet, the 13-damping sheet spring window, the 14-connecting shaft, the 15-inner disc connecting flange, the 16-large diameter section, the 17-middle diameter section, the 18-small diameter section, the 19-step surface, the 20-compression nut, the 21-gasket, the 22-flat key, the 23-key slot, the 24-motor, the 25-speed reducer and the 26-transmission shaft.
Detailed Description
Embodiments of the present utility model will be further described with reference to the accompanying drawings.
Specific embodiments of the torsional vibration damper of the present utility model:
the torsional vibration damper of embodiment 1 is used to be provided 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 2, the torsional vibration damper includes an inner rotating disc 2 and an outer rotating disc, the outer rotating disc includes a first disc 3 and a second disc 4 coaxially arranged, through holes 5 are formed in the first disc 3 and the second disc 4, so that the two discs are fixedly connected through rivets, an outer disc connecting flange 6 is integrally formed in the first disc 3, and the outer disc connecting flange 6 is fixedly connected with a motor power output flange to realize power input of the torsional vibration damper, and the motor power output flange forms a power input flange of the torsional vibration damper and serves as a power input piece of the torsional vibration damper.
As shown in fig. 2, the inner rotary disc 2 is located at the middle position of the first disc body 3 and the second disc body 4, and a notch for avoiding rivets is formed in the edge position of the inner rotary disc 2 so as to realize coaxial arrangement of the inner rotary disc 2 and the outer rotary disc.
In this embodiment, as shown in fig. 3, 4 and 5, spring windows arranged at intervals along the circumferential direction are respectively arranged on 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 which correspond in the axial direction are the same. The spring windows of the inner rotating disc 2 are internally provided with damping springs, each damping spring comprises a secondary spring window 8 with a larger size and a primary spring window 7 with a smaller size, each damping spring comprises a primary damping spring 9 and a secondary damping spring 10, each primary damping spring 9 is arranged in the primary spring window 7 of the corresponding inner rotating disc 2 in a clamped mode, and each secondary damping spring 10 is arranged in the secondary spring window 8 of the corresponding inner rotating disc 2 in a clamped mode. Window blocking edges 11 for limiting the damping springs from falling out of the spring windows of the inner rotating disc 2 are arranged on two sides of the spring windows of the first disc body 3 and the second disc body 4, which correspond to the axes of the damping springs.
In this embodiment, as shown in fig. 2, the stiffness of the primary damping spring 9 is smaller than that of the secondary damping spring 10, the primary damping spring 9 is pressed in the primary spring window 7 of the inner rotary disk 2 in the axial direction thereof, and the secondary damping spring 10 leaves a gap between in the axial direction thereof and in the secondary spring window 8 of the inner rotary disk 2 to ensure that the outer rotary disk can rotate relative to the inner rotary disk 2 in the circumferential direction by a corresponding angle. The arrangement of the primary damping springs 9 and the secondary damping springs 10 can ensure the torque transmission between the outer rotating disc and the inner rotating disc 2, reduce the torque vibration impact and improve the stability in the torque transmission process.
In this embodiment, as shown in fig. 2, damping sheets 12 are installed between the first disc body 3 and the inner rotating disc 2 and between the second disc body 4 and the inner rotating disc 2, the damping sheets 12 are circular, and the damping sheets 12 and the inner rotating disc 2 are coaxially arranged, and the damping sheets 12 can play a damping and vibration reducing role in the process that the outer rotating disc drives the inner rotating disc 2 to rotate, so that the damping of vibration amplitude in the torsion reduction device is realized, and the vibration impact in the torsion reduction device is further reduced.
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, so that the area of the damping fin 12 can be maximized, the contact area and 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 of driving the inner rotating disc 2 to rotate by the outer rotating disc, and the impact in the process of damping power torque 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 towards the second disc body 4 at the axial center position, the connecting shaft 14 penetrates out of the second disc body 4, an inner disc connecting flange 15 is detachably and fixedly connected to the connecting shaft 14, and the inner disc connecting flange 15 is used for being fixedly connected with an end flange of a transmission shaft connected with a speed reducer so as to realize 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 piece 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 middle diameter section 17 and a small diameter section 18, a step surface 19 is provided between the large diameter section 16 and the middle diameter section 17, the small diameter section 18 of the stepped shaft has an external thread, a washer 21 and a compression nut 20 for compressing the inner disc connecting flange 15 on the step surface 19 are provided on the small diameter section 18, and the compression nut 20 can prevent the inner disc connecting flange 15 from being separated from the connecting shaft 14 in the axial direction.
As shown in fig. 2, the connecting shaft 14 and the inner disc connecting flange 15 are in a rotationally fixed fit through key connection in the circumferential direction, key grooves 23 extending and arranged along the axial direction of the stepped shaft are formed in the intermediate diameter section 17 and the inner disc connecting flange 15, flat keys 22 are arranged in the key grooves 23, and the flat keys 22 are in interference fit with the key grooves 23, so that impact or collision of the inner rotating disc 2 in the process of driving the inner disc connecting flange 15 to rotate is avoided. The key connection has a simple structure, and can better avoid the impact of torque in the transmission process between the stepped shaft and the inner disc 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 inner rotating disc 2 integrally extends out to form a connecting shaft 14, and the inner rotating disc connecting flange 15 detachably fixed on the connecting shaft 14 is fixedly connected with the power output flange, so that the connection structure can better avoid affecting the service lives of the torsional vibration damper and the transmission shaft due to larger impact generated on the torsional vibration damper and the power output flange, and is beneficial to improving the service life of a power transmission system where the torsional vibration damper is located, improving the stability in the power transmission process, and further improving the driving comfort of an electric motor coach where the torsional vibration damper is located.
Embodiment 2 of the torsional vibration damper of the present utility model:
it differs from example 1 in that: a semicircular key, a wedge key or a tangential key is arranged in the key groove of the intermediate diameter section so as to realize the key connection of the connecting shaft and the inner disc connecting flange, and further realize the rotation-stopping fit of the connecting shaft and the inner disc connecting flange in the circumferential direction. The key connection structure can well avoid the impact of torque in the transmission process between the connecting shaft and the inner disc connecting flange, and further improve the stability of torque transmission.
Embodiment 3 of the torsional vibration damper of the present utility model:
it differs from example 1 in that: the connecting shaft is the step shaft, the step shaft includes big footpath section, pitch diameter section and path section, the cross-section of pitch diameter section is triangle-shaped or quadrangle or pentagon etc. the centre bore shape of interior dish flange is the same with the cross-section of pitch diameter section, interior dish flange suit is on the pitch diameter section, and with pitch diameter section interference fit, in order to realize interior dish flange and connecting shaft in the ascending rotation-stopping cooperation of circumference, interior dish flange's thickness is greater than the thickness of pitch diameter section, path section has the external screw thread, still be equipped with gasket and gland nut with interior dish flange compress tightly on the step face on the path section, gland nut can avoid interior dish flange to deviate from the connecting shaft along axial direction, above-mentioned connection structure also can realize the detachable fixed connection of connecting shaft and interior dish flange, can better avoid producing great impact to torsion damper and power take off the flange in the power transmission process and influence torsion damper and the life-span of transmission shaft, help improving the life-span of torsion damper and power transmission system that torsion damper is located, and then improve the comfort level of electric passenger car.
Embodiment 4 of the torsional vibration damper of the present utility model:
it differs from example 1 in that: the inner disc connecting flange is detachably and fixedly connected with the shaft end of the connecting shaft through bolts, and the connecting structure can also avoid large impact on the power output flange and the torsion damping device in the power transmission process, so that the driving comfort level of the electric motor coach is improved.
Embodiment 5 of the torsional vibration damper of the present utility model:
it differs from example 1 in that: damping sheets 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 the damping springs arranged in the 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, so that the stability in the torque transmission process is improved; or damping sheets 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 the damping sheets is smaller, so that the damping sheets are completely kept away from 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 sheets.
Embodiment 6 of the torsional vibration damper of the present utility model:
it differs from example 1 in that: the inner disc connecting flange is fixedly connected with the motor power output flange, the outer disc connecting flange is fixedly connected with the end flange of the transmission shaft, the connection mode can reduce vibration and impact in a power transmission system, the service lives of the power input flange and the torque vibration reduction device can be prolonged, and the driving comfort level of the electric motor coach is improved.
Embodiment 7 of the torsional vibration damper of the present utility model:
it differs from example 1 in that: an outer disc connecting flange connected with the second disc body of the outer rotating disc is integrally arranged on the second disc body of the outer rotating disc and is used for being fixedly connected with a motor power output flange so as to realize power input of the torsional vibration damper; or the first disc body and the second disc body are respectively provided with an outer disc connecting flange connected with the corresponding disc body, and the two outer disc connecting flanges are respectively used for being fixedly connected with the motor power output flange.
Embodiment 8 of the torsional vibration damper of the present utility model:
it differs from example 1 in that: the torsional vibration damping device can be further used between other power output parts and power receiving parts for transmitting torque, and the stable and smooth power transmission is realized by damping impact and vibration in the torque transmission process.
The specific embodiment of the electric bus comprises the following steps:
as shown in fig. 7, in embodiment 1, the electric motor coach includes a vehicle frame and a power transmission system fixed to the vehicle frame, the power transmission system including an electric motor 24 and a speed reducer 25 drivingly connected to the electric motor 24 through a drive shaft 26.
As shown in fig. 7, in order to reduce vibration shock during power transmission between the motor 24 and the decelerator 25 and reduce power fluctuation on the decelerator 25, a torsional vibration damper device 1 is drivingly connected between the motor 24 and the decelerator 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, so as to realize power input of the torsional vibration damper 1, the motor power output flange is used as a power input flange, namely a power input piece, of the torsional vibration damper, 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, so as to realize power output of the torsional vibration damper, and the end flange of the transmission shaft is used as a power output flange, namely a power output piece, of the torsional vibration damper, so as to realize fixed connection with the torsional vibration damper.
In this embodiment, the structure of the torsional vibration damper 1 is the same as that of the torsional vibration damper in the embodiment 1 of the torsional vibration damper, and the details are not repeated here.
In other embodiments, the structure of the torsion damping device of the electric bus is the same as that of the torsion damping device in the above-mentioned embodiments 2 to 8, and will not be repeated here.
Claims (8)
1. A torsional vibration damper, 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 axial position are arranged on the inner rotating disc and the outer rotating disc at intervals in the circumferential direction;
the damping spring is clamped in the spring window;
the inner rotating disc comprises a disc body and a connecting shaft which is integrally arranged on the disc body and extends out of the outer rotating disc, one end of the connecting shaft, far away from the disc body, 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 end of the inner disc connecting flange and the outer disc connecting flange is used for being connected with a power output flange;
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 step surface which is in stop fit with the inner disc connecting flange, and the end part of the stepped shaft is provided with a compression nut which compresses the inner disc connecting flange on the step surface.
2. The torsional vibration damper of claim 1, wherein the stepped shaft is connected with the inner disc connecting flange by a key to realize a rotation-stopping fit in the circumferential direction, and key grooves extending along the axial direction of the stepped shaft are arranged at the connecting positions of the stepped shaft and the inner disc connecting flange.
3. A torsional vibration damper according to claim 1 or 2, characterized in that damping discs are provided between the first disc and the inner rotary disc and between the second disc and the inner rotary disc.
4. A torsional vibration damper arrangement according to claim 3, characterized in that the damper is provided with damper spring windows which are axially opposite to the damper springs.
5. The utility model provides a [ electric ] motor coach, includes motor, reduction gear and connects the torsion damping device between motor and reduction gear, still includes the power input flange that is driven by the motor and is connected with the transmission of reduction gear power output flange, its characterized in that, torsion 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 axial position are arranged on the inner rotating disc and the outer rotating disc at intervals in the circumferential direction;
the damping spring is clamped in the spring window;
the inner rotating disc comprises a disc body and a connecting shaft which is integrally arranged on the disc body and extends out of the outer rotating disc, one end of the connecting shaft, far away from the disc body, 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 end of the inner disc connecting flange and the outer disc connecting flange is used for being connected with a power output flange;
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 step surface which is in stop fit with the inner disc connecting flange, and the end part of the stepped shaft is provided with a compression nut which compresses the inner disc connecting flange on the step surface.
6. The electric motor car of claim 5, wherein the stepped shaft is connected with the inner disc connecting flange through a key to realize rotation-stopping fit in the circumferential direction, and key grooves extending along the axial direction of the stepped shaft are arranged at the connecting positions of the stepped shaft and the inner disc connecting flange.
7. The electric motor car of claim 5 or 6, wherein damping fins are provided between the first disc and the inner rotating disc and between the second disc and the inner rotating disc.
8. The electric motor car of claim 7, wherein the damper is provided with a damper spring window axially opposite 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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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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