CN211731023U - Central drive formula electric drive system assembly - Google Patents
Central drive formula electric drive system assembly Download PDFInfo
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- CN211731023U CN211731023U CN201922488415.9U CN201922488415U CN211731023U CN 211731023 U CN211731023 U CN 211731023U CN 201922488415 U CN201922488415 U CN 201922488415U CN 211731023 U CN211731023 U CN 211731023U
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Abstract
The utility model discloses a central drive formula electric drive system assembly, including rotating output unit and wearing to establish the transmission shaft on rotating output unit install driving system and speed change system on the transmission shaft, driving system and speed change system are located the both sides of rotating output unit respectively, driving system passes through the transmission shaft and transmits power for speed change system, rotates output unit by the speed change system drive again, output power. Technical scheme more than adopting, through the central drive formula structure of brand-new design, has had the advantage of in-wheel motor and side hanging structure concurrently, has compensatied the not enough of in-wheel motor and side hanging structure, is particularly useful for the two wheeler, not only can guarantee well to rotate the equilibrium of output member, has high mechanical efficiency moreover, less calorific capacity, better heat-sinking capability and lighter weight.
Description
Technical Field
The utility model relates to an electric drive system technical field, concretely relates to central drive formula electric drive system assembly.
Background
With the increasing strictness of environmental regulations, new energy vehicles represented by pure electric powered automobiles, two-wheeled vehicles and three-wheeled vehicles have become a great trend to replace traditional fuel vehicles. The existing two-wheeled electric vehicle generally adopts a hub motor and a motor side-hanging structure.
The wheel hub motor is directly driven by the low-speed direct current motor, so that the efficiency is relatively low, the heat productivity is large, the original balance of the wheel structure is broken due to the large size and heavy weight of the motor, and the control performance and the safety are influenced to a certain extent.
The side-hung type structure places the motor and the speed change system (gearbox or reducer) on the same side of the driving wheel, and although a high-speed motor can be adopted to improve the mechanical efficiency, the weight of the speed change mechanism and the motor is heavier, so that the balance of the wheel is poor, and the influence on the two-wheeled vehicle is more obvious.
Therefore, a new electric drive system is urgently needed to be designed, and the advantages of the hub motor and the motor side-hanging structure can be achieved, so that the defects of the hub motor and the motor side-hanging structure are overcome.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a central drive formula electric drive system assembly.
The technical scheme is as follows:
the utility model provides a central drive formula electric drive system assembly, includes and rotates output member and wears to establish the transmission shaft on rotating output member, its main points lie in: the transmission shaft is provided with a power system and a speed change system, the power system and the speed change system are respectively positioned at two sides of the rotating output part, the power system transmits power to the speed change system through the transmission shaft, and the speed change system drives the rotating output part to rotate to output power.
Adopt the central drive formula structure of brand-new design, driving system and speed change system set up in the both sides of rotating output part relatively symmetrically, not only can guarantee well to rotate output part's equilibrium, overcome traditional side-hung structure and lead to the not good problem of equilibrium, are particularly useful for the two wheeler, can adopt high-speed motor moreover, have higher mechanical efficiency for traditional in-wheel motor, less calorific capacity, better heat-sinking capability and lighter weight.
Preferably, the method comprises the following steps: the power system comprises a motor which is sleeved on the transmission shaft and used for driving the transmission shaft to rotate and a power system box body which is wrapped outside the motor, wherein the motor and the power system box body are fixed on the transmission shaft through a power system locking part;
the speed change system comprises a speed change mechanism for speed change transmission between the transmission shaft and the rotation output part and a speed change system box body wrapped outside the speed change mechanism, wherein the speed change mechanism and the speed change system box body are fixed on the transmission shaft through a speed change system locking part.
By adopting the structure, the power system and the speed change system are respectively independent structures, so that not only can the modular design be respectively carried out, but also the installation and the maintenance are easy to be respectively carried out, and the rotary output component is convenient to disassemble and assemble.
Preferably, the method comprises the following steps: the power system box body comprises a power box base for accommodating the motor and a power box cover capable of covering the power box base, and the speed change system box body comprises a speed change box base for accommodating the speed change mechanism and a speed change box cover covering the speed change box base;
after the power box base and the motor are sequentially arranged on the transmission shaft, locking is firstly carried out through a power system locking part, then the power box cover is covered on the power box base, and then the first end cover of the transmission shaft is covered on the power box cover;
after the gearbox base, the speed change mechanism and the gearbox cover are sequentially arranged on the transmission shaft, the transmission shaft is firstly locked through the speed change system locking part, and then the second end cover of the transmission shaft is covered on the gearbox cover.
By adopting the structure, the structure is simple, reliable and easy to disassemble and assemble.
Preferably, the method comprises the following steps: the power system locking component and the speed change system locking component are half-moon keys, and half-moon key installation grooves corresponding to the half-moon keys are formed in the transmission shaft. By adopting the structure, the structure is simple and reliable, and the cost is low.
Preferably, the method comprises the following steps: the power box is characterized by further comprising a bottom fork, and two main pipes of the bottom fork are fixedly connected with the power box base and the gearbox base respectively. By adopting the structure, the whole structure is stable and reliable, and the influence on the motor and the speed change mechanism is avoided as much as possible.
Preferably, the method comprises the following steps: the speed change mechanism comprises a first-stage driving gear fixedly sleeved on the transmission shaft, a speed reduction intermediate shaft parallel to the transmission shaft, a first-stage driven gear fixedly sleeved on the speed reduction intermediate shaft, a hub driving sleeve movably sleeved on the transmission shaft and a second-stage driven gear fixedly sleeved on the hub driving sleeve, wherein the first-stage driving gear is meshed with the first-stage driven gear, a second-stage driving gear meshed with the second-stage driven gear is arranged on the speed reduction intermediate shaft, and the hub driving sleeve can drive the rotation output part to synchronously rotate. With the above configuration, the reduction gear can be stably and reliably performed.
Preferably, the method comprises the following steps: and a thrust ball bearing is arranged between the hub driving sleeve and the primary driving gear. By adopting the structure, the reliability of the installation of the hub driving sleeve and the primary driving gear is ensured.
Preferably, the method comprises the following steps: the hub driving sleeve is provided with a primary step surface and a secondary step surface, the protrusion height of the primary step surface is higher than that of the secondary step surface, the rotary output part is sleeved on the primary step surface and is in spline fit with the primary step surface, and the secondary driven gear is sleeved on the secondary step surface and is in spline fit with the secondary step surface. By adopting the structure, the assembly is easy, and the reliability is high.
Preferably, the method comprises the following steps: the motor shaft of the motor is of a hollow shaft sleeve structure, and the motor shaft is sleeved on the transmission shaft and is in spline fit with the transmission shaft. By adopting the structure, the coaxiality of the motor shaft and the transmission shaft is ensured, larger torque can be borne, and the structure is stable and reliable.
Preferably, the method comprises the following steps: the transmission shaft is provided with an encoder, and the encoder is positioned between the first end cover of the transmission shaft and the box cover of the power box. By adopting the structure, the rotating speeds of the motor and the transmission shaft can be converted into signal forms for feedback.
Compared with the prior art, the beneficial effects of the utility model are that:
the central drive type electric drive system assembly adopting the technical scheme has the advantages of novel structure, ingenious design and easiness in realization, has the advantages of both the hub motor and the side-hung structure through the newly designed central drive type structure, overcomes the defects of the hub motor and the side-hung structure, is particularly suitable for two-wheel vehicles, can well ensure the balance of a rotation output part, and has extremely high mechanical efficiency, smaller heat productivity, better heat dissipation capacity and lighter weight.
Drawings
FIG. 1 is a cross-sectional view of a center-driven electric drive system assembly;
FIG. 2 is a schematic diagram of the matching relationship between the motor, the transmission shaft and the speed change mechanism;
FIG. 3 is a schematic diagram of a central drive electric drive system assembly;
FIG. 4 is a schematic structural view of a composite wheel;
FIG. 5 is a cross-sectional view of the composite wheel;
FIG. 6 is a schematic view of a hub bracket from one of its views;
FIG. 7 is a schematic view of another perspective of the hub bracket;
FIG. 8 is a schematic view of the hub from one of the views;
fig. 9 is a schematic view of another perspective of the hub.
Detailed Description
The present invention will be further described with reference to the following examples and accompanying drawings.
As shown in fig. 1 and fig. 3, a central driving type electric driving system assembly mainly includes a rotation output member 1 and a transmission shaft 2 penetrating through the rotation output member 1, a power system and a speed change system are mounted on the transmission shaft 2, the power system and the speed change system are respectively located at two sides of the rotation output member 1, the power system transmits power to the speed change system through the transmission shaft 2, and the speed change system drives the rotation output member 1 to output power.
Through the central drive formula structure of brand-new design, had the advantage of in-wheel motor and side-hung structure concurrently, compensatied in-wheel motor and the not enough of side-hung structure, be particularly useful for the two wheeler, not only can guarantee well the equilibrium of rotation output part, have high mechanical efficiency moreover, less calorific capacity, better heat-sinking capability and lighter weight.
In this embodiment, the rotation output member 1 is a combined wheel. Referring to fig. 4 and 5, a combined wheel for a central drive type electric drive system assembly includes a hub bracket 1a, a hub 1b and a tire 1c, which are coaxially arranged from inside to outside. The speed change system drives the hub bracket 1a to drive the combined wheel to rotate. The hub 1b is a hollow structure, and the hub 1b is detachably mounted on the hub bracket 1 a. The tire 1c is sleeved on the hub 1 b.
Referring to fig. 4-9, the outer ring of the hub bracket 1a has a hub mounting ring 1a1, the inner ring of the hub 1b has a hub mounting ring 1b1 corresponding to the hub mounting ring 1a1, and the hub mounting ring 1b1 can be detachably fixed on the hub mounting ring 1a1 by a plurality of bolts 1 d. A power system and a speed change system of a central drive type electric drive system assembly are respectively arranged at two sides of a hub bracket 1a, when a tire 1c needs to be replaced or repaired, a hub 1b and the tire 1c can be taken down together only by taking down all bolts 1d (without dismounting the power system and the speed change system), and the method is completely the same as the traditional method, so that quick tire replacement can be realized, and the convenience of maintenance of the central drive type electric drive system assembly is improved.
Referring to fig. 6 and 7, the hub bracket 1a further includes a power input disc 1a2 coaxially disposed in the hub mounting ring 1a1, and the hub mounting ring 1a1 and the power input disc 1a2 are connected by a plurality of bracket connecting ribs 1a3, so that the hub bracket has high structural strength, is stable and reliable, has light weight, and can achieve the purpose of reducing weight.
The power input disc 1a2 has a drive shaft hole 1a21 at the center thereof, and the hole wall of the drive shaft hole 1a21 has a spline structure, so that power transmission can be performed stably and reliably.
A concave cavity 1a22 is formed at one side of the power input disc 1a2, a power input shaft sleeve 1a23 is arranged at the center position of the concave cavity 1a22, and the shaft hole of the power input shaft sleeve 1a23 is the driving shaft hole 1a 21. The power input sleeve 1a23 is substantially hidden in the cavity 1a22, improving the overall appearance.
The cavity 1a22 is provided with a plurality of reinforcing ribs 1a24, the reinforcing ribs 1a24 are distributed around the power input shaft sleeve 1a23 along the circumferential direction, and two ends of each reinforcing rib 1a24 are respectively connected with the cavity wall of the cavity 1a22 and the outer wall of the power input shaft sleeve 1a23, so that the structural strength of the power input disc 1a2 and the power input shaft sleeve 1a23 can be greatly improved. A circular ring-shaped flange 1a25 is formed on the surface of one side of the power input disc 1a2 opposite to the concave cavity 1a22 in a protruding mode, and a plurality of reinforcing lugs 1a26 are arranged on the outer peripheral surface of the flange 1a25, so that the structural strength of the flange 1a25 can be guaranteed.
Referring to fig. 8 and 9, the wheel hub 1b further includes a tire mounting ring 1b2 coaxially disposed outside the wheel hub mounting ring 1b1, and the tire mounting ring 1b2 and the wheel hub mounting ring 1b1 are connected by a plurality of wheel hub connecting ribs 1b3, so that the wheel hub has high structural strength, is stable and reliable, has light weight, and can achieve the purpose of reducing weight. In addition, the surface of one side of the hub connecting rib 1b3 is provided with a weight reduction groove 1b31, so that the weight reduction function is realized on the premise of ensuring the structural strength. The side surface of wheel hub installing ring 1b1 installation wheel hub installing ring 1a1 has the heavy platform of installation 1b11 that suits with wheel hub installing ring 1a1, and the heavy platform of installation 1b11 can enough fix a position wheel hub installing ring 1a1, improves assembly efficiency, can improve the reliability that wheel hub support 1a and wheel hub 1b are connected again.
Further, in order to improve the reliability of the hub bracket 1a and the hub 1b, the hub bracket 1a and the hub 1b are integrally formed.
Referring to fig. 1 and 2, the power system includes a motor 3 sleeved on a transmission shaft 2 and used for driving the transmission shaft 2 to rotate, and a power system box 4 wrapped outside the motor 3, wherein the motor 3 and the power system box 4 are fixed on the transmission shaft 2 through a power system locking part 6. The transmission system includes a transmission mechanism for transmitting a transmission between the transmission shaft 2 and the composite wheel, and a transmission housing 5 enclosed outside the transmission mechanism, the transmission mechanism and the transmission housing 5 being fixed to the transmission shaft 2 by a transmission locking member 7. It should be noted that the size of the power system case 4 and the transmission system case 5 is smaller than the size of the inner ring of the hub mounting ring 1b1, so that the hub bracket 1a and the hub 1b can be detached leftwards and rightwards, the flexibility is high, and the transmission system case is suitable for different situations.
Referring to fig. 1, the power system case 4 includes a power box base 4a for accommodating the motor 3 and a power box cover 4b capable of covering the power box base 4a, and the transmission system case 5 includes a transmission case base 5a for accommodating the transmission mechanism and a transmission case cover 5b covering the transmission case base 5 a. After the power box base 4a and the motor 3 are sequentially arranged on the transmission shaft 2, the power box base and the motor are firstly locked through the power system locking part 6, then the power box cover 4b is covered on the power box base 4a, and then the first end cover 4c of the transmission shaft is covered on the power box cover 4 b. The gearbox base 5a, the speed change mechanism and the gearbox cover 5b are sequentially arranged on the transmission shaft 2, and then are locked by the speed change system locking part 7, and then the second end cover 5c of the transmission shaft is covered on the gearbox cover 5 b.
Referring to fig. 1 and 2, the power system locking component 6 and the transmission system locking component 7 are half-moon keys, and the transmission shaft 2 is provided with half-moon key mounting grooves corresponding to the half-moon keys.
Referring to fig. 1 and 3, a central-drive electric drive system assembly further includes a bottom fork 8, and two main pipes of the bottom fork 8 are fixedly connected to the power box base 4a and the transmission case base 5a, respectively. When the tire 1c needs to be replaced, the chain stay 8 is separated from the other components.
Referring to fig. 2, the speed change mechanism includes a first-stage driving gear 9 fixedly sleeved on the transmission shaft 2, a deceleration intermediate shaft 11 parallel to the transmission shaft 2, a first-stage driven gear 10 fixedly sleeved on the deceleration intermediate shaft 11, a hub driving sleeve 13 movably sleeved on the transmission shaft 2, and a second-stage driven gear 12 fixedly sleeved on the hub driving sleeve 13, the first-stage driving gear 9 is engaged with the first-stage driven gear 10, the deceleration intermediate shaft 11 is provided with a second-stage driving tooth 11a engaged with the second-stage driven gear 12, the hub driving sleeve 13 can drive the combined wheel to synchronously rotate, and a thrust ball bearing 14 is arranged between the hub driving sleeve 13 and the first-stage driving gear 9.
The motor 3 drives the transmission shaft 2 to rotate, the transmission shaft 2 drives the first-stage driving gear 9 to rotate, the first-stage driving gear 9 drives the first-stage driven gear 10 to rotate, the first-stage driven gear 10 drives the speed reduction intermediate shaft 11 to rotate, the second-stage driving gear 11a drives the second-stage driven gear 12 to rotate, and the second-stage driven gear 12 drives the hub driving sleeve 13 to rotate.
Referring to fig. 2, the hub driving sleeve 13 has a first-stage step surface 13a and a second-stage step surface 13b, the protrusion height of the first-stage step surface 13a is higher than that of the second-stage step surface 13b, the combined wheel is sleeved on the first-stage step surface 13a and is in spline fit with the first-stage step surface 13a, and the second-stage driven gear 12 is sleeved on the second-stage step surface 13b and is in spline fit with the second-stage step surface 13 b.
And a motor shaft 3a of the motor 3 is of a hollow sleeve structure, and the motor shaft 3a is sleeved on the transmission shaft 2 and is in spline fit with the transmission shaft 2. The rotor of the motor 3 drives the motor shaft 3a to rotate, and the motor shaft 3a drives the transmission shaft 2 to rotate synchronously with the transmission shaft.
Referring to fig. 1 and 2, an encoder 17 is mounted on the transmission shaft 2, and the encoder 17 is located between the first end cover 4c of the transmission shaft and the cover 4b of the power box and can convert the rotation speeds of the motor 3 and the transmission shaft 2 into a signal form for feedback.
Referring to fig. 1, a power box oil seal 15 is arranged between the hub driving sleeve 13 and the power system box 4, and a transmission oil seal 16 is arranged between the hub driving sleeve 13 and the transmission system box 5, so as to ensure the sealing performance of the power system box 4 and the transmission system box 5 and prevent engine oil leakage.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.
Claims (10)
1. The utility model provides a central drive formula electric drive system assembly, includes rotation output part (1) and wears to establish transmission shaft (2) on rotation output part (1), its characterized in that: a power system and a speed change system are arranged on the transmission shaft (2), the power system and the speed change system are respectively positioned on two sides of the rotary output component (1), the power system transmits power to the speed change system through the transmission shaft (2), and the speed change system drives the rotary output component (1) to rotate to output power.
2. A center-driven electric drive system assembly as set forth in claim 1, wherein: the power system comprises a motor (3) which is sleeved on the transmission shaft (2) and used for driving the transmission shaft (2) to rotate and a power system box body (4) which is wrapped outside the motor (3), wherein the motor (3) and the power system box body (4) are fixed on the transmission shaft (2) through a power system locking part (6);
the speed change system comprises a speed change mechanism for speed change transmission between the transmission shaft (2) and the rotation output component (1) and a speed change system box body (5) wrapped outside the speed change mechanism, wherein the speed change mechanism and the speed change system box body (5) are fixed on the transmission shaft (2) through a speed change system locking component (7).
3. A center-driven electric drive system assembly as set forth in claim 2, wherein: the power system box body (4) comprises a power box base (4a) for accommodating the motor (3) and a power box cover (4b) capable of being covered on the power box base (4a), and the speed change system box body (5) comprises a gearbox base (5a) for accommodating the speed change mechanism and a gearbox cover (5b) covered on the gearbox base (5 a);
the power box base (4a) and the motor (3) are sequentially arranged on the transmission shaft (2), and then are locked through the power system locking part (6), then the power box cover (4b) is covered on the power box base (4a), and then the first end cover (4c) of the transmission shaft is covered on the power box cover (4 b);
the gearbox base (5a), the speed change mechanism and the gearbox cover (5b) are sequentially arranged on the transmission shaft (2), and then are locked through the speed change system locking part (7), and then the transmission shaft second end cover (5c) is covered on the gearbox cover (5 b).
4. A center-driven electric drive system assembly as set forth in claim 3, wherein: the power system locking component (6) and the speed change system locking component (7) are half-moon keys, and half-moon key installation grooves corresponding to the corresponding half-moon keys are formed in the transmission shaft (2).
5. A center-driven electric drive system assembly as set forth in claim 3, wherein: the power box is characterized by further comprising a bottom fork (8), and two main pipes of the bottom fork (8) are fixedly connected with the power box base (4a) and the gearbox base (5a) respectively.
6. A center-driven electric drive system assembly as set forth in claim 2, wherein: the speed change mechanism comprises a first-stage driving gear (9) fixedly sleeved on the transmission shaft (2), a speed reduction intermediate shaft (11) parallel to the transmission shaft (2), a first-stage driven gear (10) fixedly sleeved on the speed reduction intermediate shaft (11), a hub driving sleeve (13) movably sleeved on the transmission shaft (2) and a second-stage driven gear (12) fixedly sleeved on the hub driving sleeve (13), wherein the first-stage driving gear (9) is meshed with the first-stage driven gear (10), a second-stage driving gear (11a) meshed with the second-stage driven gear (12) is arranged on the speed reduction intermediate shaft (11), and the hub driving sleeve (13) can drive the rotation output part (1) to synchronously rotate.
7. A center-driven electric drive system assembly as set forth in claim 6, wherein: and a thrust ball bearing (14) is arranged between the hub driving sleeve (13) and the primary driving gear (9).
8. A center-driven electric drive system assembly as set forth in claim 6, wherein: hub driving sleeve (13) is gone up and is had one-level step face (13a) and second grade step face (13b), the protrusion of one-level step face (13a) highly is higher than second grade step face (13b), rotate output member (1) suit on one-level step face (13a) to with one-level step face (13a) spline fit, second grade driven gear (12) suit is on second grade step face (13b) to with second grade step face (13b) spline fit.
9. A center-driven electric drive system assembly as set forth in claim 2, wherein: a motor shaft (3a) of the motor (3) is of a hollow sleeve structure, and the motor shaft (3a) is sleeved on the transmission shaft (2) and is in spline fit with the transmission shaft (2).
10. A center-driven electric drive system assembly as set forth in claim 3, wherein: an encoder (17) is installed on the transmission shaft (2), and the encoder (17) is located between the first end cover (4c) of the transmission shaft and the power box cover (4 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922488415.9U CN211731023U (en) | 2019-12-31 | 2019-12-31 | Central drive formula electric drive system assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922488415.9U CN211731023U (en) | 2019-12-31 | 2019-12-31 | Central drive formula electric drive system assembly |
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| CN211731023U true CN211731023U (en) | 2020-10-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110949119A (en) * | 2019-12-31 | 2020-04-03 | 西南大学 | Central-drive electric drive system assembly |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110949119A (en) * | 2019-12-31 | 2020-04-03 | 西南大学 | Central-drive electric drive system assembly |
| WO2021135826A1 (en) * | 2019-12-31 | 2021-07-08 | 西南大学 | Central drive type electric drive system assembly |
| CN110949119B (en) * | 2019-12-31 | 2023-12-22 | 西南大学 | Central driving type electric driving system assembly |
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