A speed-increasing torsional damper for a range-extended electric vehicle and a range-extended electric vehicle

Abstract

The application relates to a speed-increasing torsional damper for a range-extended electric vehicle and the range-extended electric vehicle, and belongs to the technical field of automobiles. The speed-increasing torsional damper comprises a planetary gear mechanism, a torsional damping mechanism and a first limiting frame. The planetary gear mechanism comprises an outer gear ring, and a plurality of first limiting frames are fixed to the outer periphery of the outer gear ring. The torsional damping mechanism comprises a driven disc and a damping spring located in the driven disc and the first limiting frame. The damping spring is used for buffering the impact force between the driven disc and the outer gear ring. Therefore, the speed-increasing torsional damper is integrated with the speed increaser, the speed-increasing torsional damper has both the torsional damping effect and the speed-increasing effect, the engine and the generator can be matched in the high-efficiency zone in the minimum space, the efficiency of the range-extended system is improved, and the speed-increasing torsional damper has the advantages of high integration degree, small occupied space, light weight, simple manufacturing process and the like.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobiles, in particular to a speed-increasing torsional damper for a range-extended electric vehicle and the range-extended electric vehicle. BACKGROUND

[0002] With the increasing global energy shortage and environmental pollution, the automobile, one of the main terminals of energy consumption and one of the main sources of harmful gas emission, has become the focus of energy saving and emission reduction, and the hybrid electric vehicle has emerged as the times require under this background. The hybrid electric vehicle is to realize the reduction of fuel consumption and emission by improving the operation efficiency of the power system.

[0003] Since the Toyota Prius was launched in 1997, the hybrid electric vehicle technology has shown diversified and rapid development. In order to gradually develop and transition to pure electric direction, in addition to the technical improvement of the conventional hybrid electric vehicle, domestic and foreign automobile manufacturers have successively launched plug-in hybrid electric vehicles and range-extended electric vehicles. Among them, the power drive system of the range-extended electric vehicle includes an engine, a power battery, two electric machines, one of which is used as a driving electric machine to independently drive the automobile to run, and the other electric machine is used as a generator driven by the engine to charge the battery or supply power to the driving electric machine.

[0004] In the related art, the development of the range extender system of the electric vehicle inevitably involves the selection and matching of the generator and the engine. Generally, because the DC generator can realize the superior performance of speed and torque control and four-mode operation, most of the DC generators are adopted, and the high efficiency interval of the DC generator is generally about 5000rpm-10000rpm. The high efficiency interval of the engine is about 1250rpm-4000rpm. In this way, when the traditional torsional damper is adopted, the range extender cannot guarantee that the engine and the generator work in the high efficiency interval at the same time.

[0005] A range extender system of a range-extended electric vehicle and the range-extended electric vehicle with the patent number CN203344753U, the range extender system of the range-extended electric vehicle includes an engine and a generator, and further includes: a planetary gear mechanism composed of a ring gear, a sun gear, a planet carrier and a planet gear; a torsional damper having one end connected to a crankshaft of the engine and the other end connected to the ring gear of the planetary gear mechanism; wherein the planet carrier of the planetary gear mechanism is fixedly connected to a fixed part of the generator, the sun gear is connected to a generator rotor of the generator, and the planetary gear mechanism transmits the engine power from the torsional damper to the generator rotor. The planetary gear mechanism is adopted as a speed change device between the engine and the generator, the co-axial of the engine and the generator and the speed-increasing power transmission are realized, the efficiency of the generator is improved, and the generator efficiency is obviously improved especially when the automobile is running at low speed.

[0006] However, since the torsional damper has no speed increasing effect, a separate speed increaser needs to be added, which causes problems such as large occupied space, complex transmission mechanism design, high cost and the like, and therefore a speed increasing torsional damper is reasonably designed, which integrates the torsional damper and the speed increaser, has the advantages of high integration, small occupied space, light weight, simple manufacturing process and the like, and has important significance. SUMMARY

[0007] Embodiments of the present application provide a speed increasing torsional damper for a range extended electric vehicle and a range extended electric vehicle, to solve the problem of large occupied space, complex transmission mechanism design, high cost and the like caused by the need to add a separate speed increaser in the range extender system of the electric vehicle in the related art.

[0008] The first aspect of the embodiments of the present application provides a speed increasing torsional damper for a range extended electric vehicle, comprising:

[0009] The planetary gear mechanism comprises an outer gear ring, and a plurality of first limiting frames are fixed to the outer periphery of the outer gear ring;

[0010] The torsional damping mechanism comprises a driven disc and a damping spring located in the driven disc and the first limiting frame, and the damping spring is used to buffer the impact force between the driven disc and the outer gear ring.

[0011] In some embodiments, a synchronization device is further included, and when the torque difference between the driven disc and the outer gear ring reaches a set threshold, the synchronization device synchronizes the rotation of the driven disc and the outer gear ring.

[0012] In some embodiments, the synchronization device comprises an arc-shaped hole provided on the driven disc and a pawl fixed to the outer gear ring and extending into the arc-shaped hole.

[0013] In some embodiments, a mounting ring fixed to the outer gear ring is further included, and a plurality of the pawls are integrally provided on the mounting ring.

[0014] In some embodiments, the synchronization device is a limiting block fixed to the driven disc and extending between two adjacent first limiting frames.

[0015] In some embodiments, the driven disc comprises a first inner ring located at the outer periphery of the outer gear ring, the outer periphery of the inner ring is provided with a plurality of second limiting frames accommodating the damping springs, and a plurality of connecting plates for opening the arc-shaped hole are provided.

[0016] In some embodiments, a limiting disc is further included, the limiting disc comprises a second inner ring located at the outer periphery of the outer gear ring, the outer periphery of the second inner ring is provided with a plurality of third limiting frames accommodating the damping springs, and the first inner ring and the second inner ring are separately arranged on the two sides of the first limiting frame.

[0017] In some embodiments, the first housing and the second housing are further wrapped around the planetary gear mechanism and the torsional vibration damper mechanism, the driven disc further comprises a flange plate connected to the plurality of connecting plates, and the first housing, the flange plate and the second housing are fixedly connected by bolts.

[0018] The planetary gear mechanism further comprises a planet carrier, and the second housing is provided with a clearance hole for exposing the planet carrier.

[0019] In some embodiments, the planetary gear mechanism further comprises a sun gear, the sun gear is provided with a spline shaft connected to the rotor of the engine, and an end of the spline shaft is provided with an oil injection channel for injecting oil into the interior of the planetary gear mechanism.

[0020] The second aspect of the embodiments of the present application provides a range-extended electric vehicle, comprising:

[0021] The range-extended electric vehicle speed increasing torsional vibration damper according to any one of the above embodiments.

[0022] The technical scheme provided by the present application has the following beneficial effects:

[0023] The embodiments of the present application provide a range-extended electric vehicle speed increasing torsional vibration damper and a range-extended electric vehicle. Due to the planetary gear mechanism, it comprises an outer gear ring, and a plurality of first limiting frames are fixedly arranged on the outer periphery of the outer gear ring; the torsional vibration damper mechanism comprises a driven disc and a damping spring located in the driven disc and the first limiting frame, and the damping spring is used for buffering the impact force between the driven disc and the outer gear ring. Therefore, the torsional vibration damper and the speed increaser are integrated, so that the engine and the generator in the high efficiency area can be matched in the minimum space, the efficiency of the range-extended system is improved, and the range-extended electric vehicle has the advantages of high integration, small occupied space, light weight, simple manufacturing process and the like. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Fig. 1 The structure schematic diagram of the embodiments of the present application;

[0026] Fig. 2 The structure schematic diagram of the driven disc of the embodiments of the present application;

[0027] Fig. 3 The connection schematic diagram of the outer gear ring and the mounting ring of the embodiments of the present application;

[0028] Fig. 4 A structural schematic diagram of a sun gear of an embodiment of the present application is shown in FIG. 1.

[0029] Fig. 5 A structural schematic diagram of a planet carrier of an embodiment of the present application is shown in FIG. 2.

[0030] Fig. 6 A connection schematic diagram of a driven disc and a pawl of an embodiment of the present application is shown in FIG. 3.

[0031] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0032] 1, outer gear ring; 2, driven disc; 3, first limiting frame; 4, shock-absorbing spring; 5, arc-shaped hole; 6, pawl; 7, mounting ring; 8, first inner ring; 9, second limiting frame; 10, connecting plate; 11, limiting disc; 12, second inner ring; 13, third limiting frame; 14, first housing; 15, second housing; 16, flange plate; 17, planet carrier; 18, clearance hole; 19, sun gear; 20, spline shaft; 21, oil injection channel; 22, planet gear; 23, positioning shaft; 24, gear shaft; 25, fixed shaft; 26, gear. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, any other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0034] The embodiments of the present application provide a speed-increasing torsional damper for a range-extended electric vehicle and a range-extended electric vehicle, which can solve the problems of large space occupation, complex transmission mechanism design, and high cost caused by the need to increase a separate speed increaser in the range-extended electric vehicle system in the related art.

[0035] Referring to FIG. 1, Figs. 1 to 6 The first aspect of the embodiments of the present application provides a speed-increasing torsional damper for a range-extended electric vehicle, which includes:

[0036] The planet gear mechanism includes an outer gear ring 1, and a plurality of first limiting frames 3 are fixed to the outer periphery of the outer gear ring 1.

[0037] The torsional damping mechanism includes a driven disc 2 and a shock-absorbing spring 4 located in the driven disc 2 and the first limiting frame 3, and the shock-absorbing spring 4 is used to buffer the impact force between the driven disc 2 and the outer gear ring 1.

[0038] The planetary gear mechanism of the speed-increasing and torsional vibration damper for the extended-range electric vehicle comprises an outer gear ring 1, a plurality of first limiting frames 3 fixed on the outer periphery of the outer gear ring 1; a torsional vibration damping mechanism comprising a driven disc 2 and a damping spring 4 located in the driven disc 2 and the first limiting frame 3, the damping spring 4 being used for buffering the impact force between the driven disc 2 and the outer gear ring 1.

[0039] In specific use, the planetary gear mechanism further comprises a planetary gear 22 engaged with the inner side of the outer gear ring 1, a sun gear 19 engaged with the planetary gear 22, and a planet carrier 17 limiting the rotation of the planetary gear 22 around the sun gear 19. The sun gear 19 is connected to the rotor of the generator, the planet carrier 17 is connected to the fixed part of the generator, and the driven disc 2 is connected to the flywheel of the engine.

[0040] Operation process description:

[0041] When the generator drives the engine to start the engine:

[0042] 1. The generator transmits power to the sun gear 19;

[0043] 2. The sun gear 19 transmits power to the planetary gear 22 through engagement. At this time, the planet carrier 17 is connected to the fixed part of the generator, so that the planetary gear 22 only revolves but does not revolve.

[0044] 3. The planetary gear 22 transmits power to the outer gear ring 1 through engagement. When the torque of the outer gear ring 1 is greater than the compression force of the damping spring 4, the damping spring 4 is deformed under pressure, thereby storing the rotational inertia in the transmission process to reduce the impact load;

[0045] 4. The power is transmitted to the driven disc 2 through the damping spring 4, and the driven disc 2 transmits the power to the engine.

[0046] After the engine is ignited, when the engine drives the generator to generate electricity:

[0047] 1. The engine transmits power to the driven disc 2 through the flywheel. When the torque of the driven disc 2 is greater than the compression force of the damping spring 4, the damping spring 4 is deformed under pressure, thereby storing the rotational inertia in the transmission process to reduce the impact load;

[0048] 2. The power is transmitted to the outer gear ring 1 through the damping spring 4;

[0049] 3. The outer gear ring 1 transmits power to the planetary gear 22 through engagement;

[0050] 4. The planetary gear 22 transmits power to the sun gear 19 through engagement, and the sun gear 19 drives the generator to rotate and generate electricity.

[0051] It should be noted that when the generator drives the engine to generate electricity, the speed is increased, and the problem of matching the engine and the engine in the high efficiency interval is solved.

[0052] The speed increasing ratio is i=Z3 / Z1.

[0053] Wherein, the number of teeth of the outer ring gear 1 is Z1, and the number of teeth of the sun gear 19 is Z3. The number of teeth of the outer ring gear 1 Z1 is greater than the number of teeth of the sun gear 19 Z3, i is less than 1, and the speed is increased.

[0054] It should be noted that the speed and torque at the engine and motor end can be changed by changing the speed ratio of the sun gear 19 and the planet wheel 22, so that the engine and the generator are kept in the high efficiency interval; according to the actual use condition, the damping spring 4 with appropriate stiffness is selected to store the rotational inertia in the transmission process, so as to reduce the impact load and improve the service life.

[0055] In some optional embodiments: referring to Figs. 1 to 6 The application embodiment provides a speed increasing and torsional vibration damper for a range-extended electric vehicle, and the speed increasing and torsional vibration damper for the range-extended electric vehicle further comprises a synchronous device, when the torque difference between the driven disc 2 and the outer ring gear 1 reaches a set threshold value, the synchronous device synchronizes the rotation of the driven disc 2 and the outer ring gear 1.

[0056] The synchronous device comprises an arc-shaped hole 5 arranged on the driven disc 2 and a pawl 6 fixed on the outer ring gear 1 and extending into the arc-shaped hole 5.

[0057] The speed increasing and torsional vibration damper for the range-extended electric vehicle further comprises a synchronous device, when the torque difference between the driven disc 2 and the outer ring gear 1 reaches a set threshold value, the synchronous device synchronizes the rotation of the driven disc 2 and the outer ring gear 1; the synchronous device comprises an arc-shaped hole 5 arranged on the driven disc 2 and a pawl 6 fixed on the outer ring gear 1 and extending into the arc-shaped hole 5, and the pawl 6 is located at the middle position of the arc-shaped hole 5.

[0058] In specific use, when the torque difference between the driven disc 2 and the outer ring gear 1 reaches the set threshold value in the running process, the pawl 6 fixed on the outer ring gear 1 and extending into the arc-shaped hole 5 slides to the limit position in the arc-shaped hole 5 on the driven disc 2, the pawl 6 forms a rigid connection with the driven disc 2, and the power is transmitted to the driven disc 2. The driven disc 2 and the outer ring gear 1 are synchronized to rotate, and the damping spring 4 is prevented from being compressed to the limit.

[0059] It should be noted that the set threshold value can be 40 to 60 N, so that when the torque of the driven disc 2 exceeds the compression force of the damping spring 4, the damping spring 4 deforms to store the rotational inertia in the transmission process, so as to reduce the impact load, and at the same time, the torque difference between the driven disc 2 and the outer ring gear 1 reaches the set threshold value, at this time, the driven disc 2 and the outer ring gear 1 are rigidly connected through the pawl 6 abutting at the limit position of the arc-shaped hole 5, and the rotation speed is synchronized.

[0060] In some optional embodiments, referring to Figs. 1 to 6 As shown in the figure, the embodiment of the application provides a speed-increasing torsional damper for a range-extended electric vehicle, which further comprises a mounting ring 7 fixed on the outer ring gear 1, and a plurality of clamping claws 6 are integrally arranged on the mounting ring 7.

[0061] The speed-increasing torsional damper for a range-extended electric vehicle of the embodiment of the application further comprises a mounting ring 7 fixed on the outer ring gear 1, and a plurality of clamping claws 6 are integrally arranged on the mounting ring 7.

[0062] In specific use, the mounting ring 7 with the clamping claws 6 can be conveniently sleeved on the outer periphery of the outer ring gear 1 for installation, and can be fixedly connected through welding or bolts, etc., and when the clamping claws 6 are worn, the mounting ring 7 can be replaced as a whole, so that the specifications of the parts are standardized, and the maintenance cost is reduced.

[0063] In some optional embodiments, referring to Figs. 1 to 6 As shown in the figure, the embodiment of the application provides a speed-increasing torsional damper for a range-extended electric vehicle, and the synchronization device of the speed-increasing torsional damper for a range-extended electric vehicle is a limiting block fixed on the driven disc 2 and extending to between the adjacent two first limiting frames 3.

[0064] The synchronization device of the speed-increasing torsional damper for a range-extended electric vehicle of the embodiment of the application is a limiting block (not shown in the figure) fixed on the driven disc 2 and extending to between the adjacent two first limiting frames 3.

[0065] In specific use, when the torque difference between the driven disc 2 and the outer ring gear 1 reaches the set threshold value during operation, the limiting block fixed on the driven disc 2 abuts against the first limiting frame 3 of the driven disc 2, the limiting block and the driven disc 2 form a rigid connection, and the power is transmitted to the driven disc 2. The driven disc 2 and the outer ring gear 1 are synchronously rotated, and at the same time, the shock-absorbing spring 4 is prevented from being compressed to the limit.

[0066] In some optional embodiments, referring to Figs. 1 to 6 As shown in the figure, the embodiment of the application provides a speed-increasing torsional damper for a range-extended electric vehicle, and the driven disc 2 of the speed-increasing torsional damper for a range-extended electric vehicle comprises a first inner ring 8 located at the outer periphery of the outer ring gear 1, the outer periphery of the inner ring is provided with a plurality of second limiting frames 9 accommodating the shock-absorbing spring 4, and a plurality of connecting plates 10 for opening the arc-shaped hole 5.

[0067] The driven disc 2 of the speed-increasing torsional damper for a range-extended electric vehicle of the embodiment of the application comprises a first inner ring 8 located at the outer periphery of the outer ring gear 1, the outer periphery of the inner ring is provided with a plurality of second limiting frames 9 accommodating the shock-absorbing spring 4, and a plurality of connecting plates 10 for opening the arc-shaped hole 5.

[0068] In specific use, the first inner ring 8 can be arranged on the outer periphery of the outer ring gear 1, so as to reduce the axial length of the assembled whole device, improve the utilization rate of the whole space, and improve the integration.

[0069] It should be noted that the number of the connecting plates 10 and the second limiting frames 9 is equal, and the connecting plates 10 and the second limiting frames 9 are arranged at equal distances in a ring shape and are staggered.

[0070] In some optional embodiments, referring to Figs. 1 to 6 As shown in the figure, the embodiment of the application provides a speed-increasing torsional vibration damper for a range-extended electric vehicle, and the speed-increasing torsional vibration damper for the range-extended electric vehicle further comprises a limiting disc 11, the limiting disc 11 comprises a second inner ring 12 located on the outer periphery of the outer ring gear 1, the outer periphery of the second inner ring 12 is provided with a plurality of third limiting frames 13 accommodating the shock-absorbing springs 4, and the first inner ring 8 and the second inner ring 12 are arranged on two sides of the first limiting frame 3.

[0071] The speed-increasing torsional vibration damper for the range-extended electric vehicle further comprises a limiting disc 11, the limiting disc 11 comprises a second inner ring 12 located on the outer periphery of the outer ring gear 1, the outer periphery of the second inner ring 12 is provided with a plurality of third limiting frames 13 accommodating the shock-absorbing springs 4, and the first inner ring 8 and the second inner ring 12 are arranged on two sides of the first limiting frame 3.

[0072] In specific use, the shock-absorbing springs 4 are installed in the first limiting frame 3 on the outer ring gear 1 and are exposed on two sides of the first limiting frame 3, the first inner ring 8 is installed on the outer periphery of the outer ring gear 1, the second limiting frame 9 on the first inner ring 8 is sleeved on the shock-absorbing spring 4, the second inner ring 12 is installed on the other side of the first limiting frame 3, and the third limiting frame 13 on the second inner ring 12 is also sleeved on the shock-absorbing spring 4, so as to avoid the shock-absorbing spring 4 from being separated from the first limiting frame 3.

[0073] It should be noted that the number and structure of the second limiting frame 9 and the third limiting frame 13 are the same, the second limiting frame 9 is composed of two vertical blocks connected to the outer periphery of the second inner ring 12 and an arc-shaped plate connected between the two vertical blocks, the two vertical blocks are used for abutting against two ends of the shock-absorbing spring 4, and the arc-shaped plate is used for abutting against the outer peripheral surface of the shock-absorbing spring 4, the second limiting frame 9 and the third limiting frame 13 are matched, and then the shock-absorbing spring 4 is avoided from being separated from the first limiting frame 3.

[0074] In some optional embodiments, referring to Figs. 1 to 6 As shown in the figure, the embodiment of the application provides a speed-increasing torsional vibration damper for a range-extended electric vehicle, and the speed-increasing torsional vibration damper for the range-extended electric vehicle further comprises a first housing 14 and a second housing 15 wrapping the planetary gear mechanism and the torsional vibration damper mechanism, the driven disc 2 further comprises a flange disc 16 connecting a plurality of connecting plates 10, and the first housing 14, the flange disc 16 and the second housing 15 are fixedly connected through bolts.

[0075] The planetary gear mechanism further comprises a planet carrier 17, and the second shell 15 is provided with a clearance hole 18 for exposing the planet carrier 17.

[0076] The range-extended electric vehicle speed-increasing torsional damper further comprises a first shell 14 and a second shell 15 for wrapping the planetary gear mechanism and the torsional damper mechanism, the driven disc 2 further comprises a flange disc 16 connected with the plurality of connecting plates 10, and the first shell 14, the flange disc 16 and the second shell 15 are fixedly connected by bolts; the planetary gear mechanism further comprises a planet carrier 17, and the second shell 15 is provided with a clearance hole 18 for exposing the planet carrier 17.

[0077] In specific use, the first shell 14, the flange disc 16 and the second shell 15 are fixedly connected by bolts, and the bolts extend to the generator flywheel, so that the three can be fixedly installed with the generator flywheel, and the planetary gear mechanism and the torsional damper mechanism are wrapped inside for protection; the clearance hole 18 provided on the second shell 15 can pass through the planet carrier 17, so that the planet carrier 17 can be conveniently connected with the fixed part of the generator.

[0078] It should be noted that the head of the planet carrier 17 can be provided with a rectangular protruding structure matched with a rectangular groove of the motor front shell to fix the planet carrier 17 so that the planet carrier 17 does not rotate; the first shell 14 is connected with the driven disc 2 and the second shell 15 by six bolts and is fixed to the engine flywheel.

[0079] In some optional embodiments, referring to Figs. 1 to 6 It should be noted that the head of the planet carrier 17 can be provided with a rectangular protruding structure matched with a rectangular groove of the motor front shell to fix the planet carrier 17 so that the planet carrier 17 does not rotate; the first shell 14 is connected with the driven disc 2 and the second shell 15 by six bolts and is fixed to the engine flywheel.

[0080] The planetary gear mechanism of the range-extended electric vehicle speed-increasing torsional damper further comprises a sun gear 19, the sun gear 19 is provided with a spline shaft 20 connected with a rotor of an engine, and the end of the spline shaft 20 is provided with an oil injection oil channel 21 for injecting oil into the planetary gear mechanism.

[0081] In specific use, oil can be injected into the planetary gear mechanism through the oil injection oil channel 21 for lubrication, and an oil injection plug can be installed on the oil injection oil channel 21 when no oil is injected.

[0082] It should be noted that the sun gear 19 includes a positioning shaft 23, a needle bearing sleeved outside the positioning shaft 23, and a gear shaft 24 of the splined shaft 20, the gear shaft 24 is provided with a mounting hole for mounting the positioning shaft 23 and the needle bearing at an end away from the splined shaft 20, the positioning shaft 23 is provided with a bearing retainer, and the first shell 14 is provided with an inner recess hole for positioning the sun gear 19.

[0083] The planetary gear 22 includes a fixed shaft 25 fixed with the planet carrier 17, the fixed shaft 25 is connected with a gear 26 through a needle bearing at an outer periphery of the fixed shaft 25, and the gear 26 is provided with bearing retainers at both sides.

[0084] The planet carrier 17 is integrated with the three fixed shafts 25. The planet carrier 17 is provided with a rectangular structure flange at a head portion, cooperates with a rectangular recess of a front shell of the motor, and fixes the planet carrier 17 so that the planet carrier 17 does not rotate. The planet carrier 17 is provided with an inner recess hole for mounting the sun gear 19, and is sealed with an oil seal between the planet carrier 17 and the sun gear 19 shaft. The planet carrier 17 and the second shell 15 are also sealed with an oil seal.

[0085] Referring to Figs. 1 to 6 The second aspect of the embodiment of the present application provides a range-extended electric vehicle, which comprises:

[0086] The range-extended electric vehicle uses the speed-increasing and torsional vibration damper for a range-extended electric vehicle according to any one of the above embodiments.

[0087] The range-extended electric vehicle uses the speed-increasing and torsional vibration damper for a range-extended electric vehicle according to any one of the above embodiments.

[0088] Operation process description:

[0089] When the generator drives the engine to start the engine:

[0090] 1. The generator transmits power to the sun gear 19;

[0091] 2. The sun gear 19 meshes with the planetary gear 22 to transmit power to the planetary gear 22. At this time, the planet carrier 17 is connected to the fixed part of the generator, so that the planetary gear 22 only revolves but does not rotate.

[0092] 3. The planetary gear 22 meshes with the outer gear ring 1 to transmit power to the outer gear ring 1. The torque of the outer gear ring 1 exceeds the compression force of the damping spring 4, the first limiting frame 3 on the outer gear ring 1 extrudes the damping spring 4 in the second limiting frame 9, the damping spring 4 is deformed under pressure, and further stores the rotational inertia in the transmission process to reduce the impact load;

[0093] 4. The pawl 6 on the outer gear ring 1 slides in the arc-shaped hole 5 on the driven disc 2 to the limit position, the pawl 6 forms a rigid connection with the driven disc 2 to transmit power to the driven disc 2;

[0094] 5、The driven disc 2 transmits power to the engine through the first housing 14.

[0095] After the engine is ignited, the engine drives the generator to generate electricity:

[0096] 1、The engine transmits power to the first housing 14 through the flywheel, and the first housing 14 transmits power to the driven disc 2. The torque of the driven disc 2 exceeds the compression force of the damping spring 4, the second limiting frame 9 on the driven disc 2 extrudes the damping spring 4 in the first limiting frame 3, the damping spring 4 is deformed under pressure, and further stores the rotational inertia in the transmission process to reduce the impact load;

[0097] 2、The pawl 6 on the outer ring gear 1 slides to the limit position in the arc-shaped hole 5 on the driven disc 2, and the pawl 6 forms a rigid connection with the driven disc 2, and the driven disc 2 transmits power to the outer ring gear 1;

[0098] 3、The outer ring gear 1 meshes with the planetary gear 22 to transmit power to the planetary gear 22;

[0099] 4、The planetary gear 22 meshes with the sun gear 19 to transmit power to the sun gear 19;

[0100] 5、The sun gear 19 transmits power to the generator.

[0101] Compared with the traditional torsional damper, the embodiment of the application has a speed increasing effect, and improves the efficiency of the range extending system by about 2% to 4%; compared with the transmission torsional damper connected with the speed increaser, the structure is compact, which is beneficial to the vehicle layout, and the cost of parts is relatively low.

[0102] In the description of the present application, it should be pointed out that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0103] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0104] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. A speed-increasing torsional vibration damper for an extended-range electric vehicle, characterized in that: include: A planetary gear mechanism comprising an outer gear ring (1), wherein a plurality of first limiting frames (3) are fixed to the outer periphery of the outer gear ring (1); A torsional vibration damping mechanism comprising a driven disc (2) and a damping spring (4) located within the driven disc (2) and a first limiting frame (3), wherein the damping spring (4) is used to buffer the impact force between the driven disc (2) and the outer gear ring (1); It also includes a synchronization device, which causes the driven disc (2) and the outer gear ring (1) to rotate synchronously when the torque difference between the driven disc (2) and the outer gear ring (1) reaches a set threshold value; The synchronization device comprises an arc-shaped hole (5) provided on the driven disc (2) and a claw (6) fixed on the outer gear ring (1) and extending into the arc-shaped hole (5); The driven disc (2) comprises a first inner ring (8) located on the outer periphery of the outer gear ring (1), and the outer periphery of the inner ring is provided with a plurality of second limit frames (9) for accommodating the shock-absorbing springs (4), and a plurality of connecting plates (10) for opening the arc-shaped holes (5); The invention also includes a limiting plate (11), wherein the limiting plate (11) includes a second inner ring (12) located on the outer periphery of the outer gear ring (1), and a plurality of third limiting frames (13) for accommodating shock-absorbing springs (4) are provided on the outer periphery of the second inner ring (12), and the first inner ring (8) and the second inner ring (12) are respectively arranged on both sides of the first limiting frame (3).

2. The speed-increasing torsional vibration damper for an extended-range electric vehicle according to claim 1, characterized in that: It also includes a mounting ring (7) fixed on the outer gear ring (1), and a plurality of the clamping claws (6) are integrally provided on the mounting ring (7).

3. The speed-increasing torsional vibration damper for an extended-range electric vehicle according to claim 1, characterized in that: The synchronization device is a limit block fixed on the driven disk (2) and extending between two adjacent first limit frames (3).

4. The speed-increasing torsional vibration damper for an extended-range electric vehicle according to claim 1, characterized in that: It also includes a first housing (14) and a second housing (15) that enclose the planetary gear mechanism and the torsional vibration damping mechanism, the driven disc (2) also includes a flange (16) connected to the plurality of connecting plates (10), and the first housing (14), the flange (16) and the second housing (15) are fixedly connected by bolts; The planetary gear mechanism further comprises a planet carrier (17), and the second housing (15) is provided with a clearance hole (18) for exposing the planet carrier (17).

5. The speed-increasing torsional vibration damper for an extended-range electric vehicle according to claim 1, characterized in that: The planetary gear mechanism further comprises a sun gear (19), a spline shaft (20) connected to an engine rotor is provided on the sun gear (19), and an oil injection channel (21) for injecting oil into the interior of the planetary gear mechanism is provided at the end of the spline shaft (20).

6. An extended-range electric vehicle, characterized in that: include: The speed-increasing torsional vibration damper for a range-extended electric vehicle according to any one of claims 1 to 5.

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