CN118074421A - Driving motor - Google Patents
Driving motor Download PDFInfo
- Publication number
- CN118074421A CN118074421A CN202410222712.1A CN202410222712A CN118074421A CN 118074421 A CN118074421 A CN 118074421A CN 202410222712 A CN202410222712 A CN 202410222712A CN 118074421 A CN118074421 A CN 118074421A
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- Prior art keywords
- cycloid
- outer hub
- central shaft
- clutch
- speed reducing
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- 230000007246 mechanism Effects 0.000 claims abstract description 111
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 230000009467 reduction Effects 0.000 claims abstract description 35
- 238000000926 separation method Methods 0.000 claims description 7
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Retarders (AREA)
Abstract
The invention relates to a driving motor, which comprises a central shaft, a rotor assembly, a planetary transmission mechanism, a cycloid speed reducing mechanism, a clutch mechanism and an outer hub, wherein the central shaft is connected with the rotor assembly; the outer hub is connected with the cycloid speed reducing mechanism through a clutch mechanism; when the rotor assembly rotates, the planetary transmission mechanism is driven to rotate, so that the planetary transmission mechanism drives the cycloid speed reducing mechanism to rotate, and the outer hub is driven to rotate positively relative to the central shaft; the motor adopts the two-stage speed reduction of the planetary transmission mechanism and the cycloid speed reduction mechanism, meanwhile, the rotor assembly is firstly adopted to reach the planetary transmission mechanism and then reach the speed reduction mode of the cycloid speed reduction mechanism, the speed reduction mechanism is stable, the stability of the transmission of the planetary transmission mechanism can be ensured, the stable swing of the cycloid speed reduction mechanism can also be ensured, the virtual position rotation is prevented, the abrasion is reduced, the two-stage speed reduction ensures that the torque of the driving motor is large, the supporting capacity and the bearing capacity are strong, the two-stage speed reduction structure is compact, the whole size of the motor is small, and the motor is suitable for the frames of most bicycles.
Description
[ Field of technology ]
The invention relates to the field of motors, in particular to a driving motor.
[ Background Art ]
In a power assisted bicycle, a motor is typically provided to power a user.
For this reason, the utility model of publication number CN220015875U discloses a clutch, a hub motor and a vehicle, which relate to the clutch field. The technical scheme is characterized by comprising a clutch inner ring, a clutch outer ring and a plurality of clutch rollers arranged between the clutch inner ring and the clutch outer ring, wherein a rolling bearing structure is further arranged between the clutch inner ring and the clutch outer ring. According to the utility model, the rolling bearing structure is arranged between the clutch inner ring and the clutch outer ring, the resistance is reduced by utilizing rolling friction, and the matching precision and stability of the clutch inner ring and the clutch outer ring are improved.
The above patent has the following problems: the motor is driven by a multi-section gear or a planetary gear. The electric machine has the advantages of larger volume, low rotation efficiency, small reduction ratio, poor supporting capacity and bearing capacity, small motor torque, large motor integral weight, unsuitable installation size and many limitations on frame design.
The prior art therefore does not meet our needs.
[ Invention ]
In order to solve the problems, the invention provides a driving motor with large torque.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a driving motor includes
A central shaft which is hollow;
A rotor assembly disposed on the central shaft;
The planetary transmission mechanism is connected with the rotor assembly;
the cycloid speed reducing mechanism is connected with the planetary transmission mechanism;
The clutch mechanism is connected with the cycloid speed reducing mechanism;
The outer hub is rotatably arranged on the central shaft;
The outer hub is connected with the cycloid speed reducing mechanism through a clutch mechanism; when the rotor assembly rotates, the planetary transmission mechanism is driven to rotate, so that the planetary transmission mechanism drives the cycloid speed reducing mechanism to rotate, and at the moment, the outer hub is linked with the cycloid speed reducing mechanism through the clutch mechanism, so that the cycloid speed reducing mechanism drives the outer hub to rotate positively relative to the central shaft; when the outer hub rotates reversely relative to the central shaft, the clutch mechanism is separated to enable the outer hub to be separated from the cycloid speed reducing mechanism, and the outer hub rotates relative to the cycloid speed reducing mechanism.
As a preferred embodiment, further defined as: the planetary transmission mechanism comprises a sun gear fixedly connected with the rotor circumference of the rotor assembly and at least two planetary gears which are arranged around the sun gear in a surrounding mode, and the sun gear is clamped between the planetary gears.
As a preferred embodiment, further defined as: the rotor assembly further comprises a stator, the rotor rotates relative to the stator, the rotor comprises a magnetizer and a magnet arranged in the magnetizer, and a magnetic groove for placing the magnet is formed in the magnetizer.
As a preferred embodiment, further defined as: the two adjacent magnetic grooves are arranged in a V shape, and the two ends of the length direction of the magnetic grooves are respectively provided with a separation groove communicated with the magnetic grooves.
As a preferred embodiment, further defined as: the cycloid speed reducing mechanism comprises a first cycloid wheel, a second cycloid wheel, an eccentric wheel which is arranged on the planet wheel and used for driving the first cycloid wheel and the second cycloid wheel to swing, and a shaft sleeve sleeved on the first cycloid wheel and the second cycloid wheel, and the shaft sleeve is connected with the outer hub through a clutch mechanism; when the sun gear drives the planet gears to rotate, the first cycloid gear and the second cycloid gear swing to drive the shaft sleeve and the outer hub to rotate.
As a preferred embodiment, further defined as: the cycloid speed reducing mechanism further comprises a first shell used for fixing the planet gears and a second shell fixed on the first shell, wherein a chute is arranged on the second shell, and a locking column used for being clamped with the central shaft is arranged in the chute.
As a preferred embodiment, further defined as: the clutch mechanism comprises a first helical gear arranged on the shaft sleeve and a clutch post arranged between the first helical gear and the outer hub; when the shaft sleeve rotates forwards, the clutch post is linked with the first helical gear so that the first helical gear drives the outer hub to rotate forwards through the clutch post; when the outer hub rotates reversely relative to the central shaft, the clutch post moves on the first helical gear so as to disconnect the outer hub from the cycloidal speed reducing mechanism.
As a preferred embodiment, further defined as: the outer hub comprises a hub main body and an end cover covered on the hub main body, and the clutch column is connected with the end cover.
As a preferred embodiment, further defined as: the tower foundation is arranged at one end of the central shaft, and the tower foundation is connected with the outer hub through the connecting shell.
As a preferred embodiment, further defined as: the upper end of the connecting shell is provided with a second helical tooth, and a third helical tooth matched with the second helical tooth is arranged in the tower foundation.
The beneficial effects of the invention are as follows: the motor adopts a two-stage speed reduction mode of the planetary transmission mechanism and the cycloid speed reduction mechanism, meanwhile, the rotor assembly is adopted to the planetary transmission mechanism and then to the cycloid speed reduction mechanism, the speed reduction mechanism is stable, the stability of the transmission of the planetary transmission mechanism can be ensured, the cycloid speed reduction mechanism can also be ensured to swing stably, virtual rotation is prevented, abrasion is reduced, the two-stage speed reduction ensures that the torque of the driving motor is large, the supporting capacity and the bearing capacity are strong, meanwhile, the central shaft adopts a hollow design, the weight of the motor is reduced, the two-stage speed reduction structure is compact, the whole volume of the motor is small, the installation size is met, and the motor frame of most bicycles can be suitable.
[ Description of the drawings ]
FIG. 1 is one of the structural schematic diagrams of the present invention;
FIG. 2 is a second schematic diagram of the structure of the present invention;
FIG. 3 is a transverse cross-sectional view of the present invention;
FIG. 4 is an enlarged schematic view of A in FIG. 3;
FIG. 5 is an exploded view of the present invention;
FIG. 6 is an exploded view of the planetary transmission, cycloidal reduction mechanism and clutch mechanism;
FIG. 7 is a longitudinal cross-sectional view of the present invention;
FIG. 8 is a schematic structural view of a planet;
FIG. 9 is a schematic structural view of a sleeve;
fig. 10 is a schematic structural view of the second housing;
FIG. 11 is a top view;
Fig. 12 is a schematic structural view of the connection housing.
[ Detailed description ] of the invention
The invention is described in further detail below with reference to the attached drawings and detailed description:
as shown in fig. 1 to 12, a driving motor includes
A central shaft 1 which is hollow;
a rotor assembly 100 disposed on the central shaft 1;
a planetary transmission mechanism 200 connected to the rotor assembly 100;
a cycloid reduction mechanism 300 connected to the planetary gear mechanism 200;
A clutch mechanism 400 connected to the cycloid reduction mechanism 300;
An outer hub 2 rotatably provided on the central shaft 1;
The outer hub 2 is connected with the cycloidal reduction mechanism 300 through a clutch mechanism 400; when the rotor assembly 100 rotates, the planetary transmission mechanism 200 is driven to rotate, so that the planetary transmission mechanism 200 drives the cycloid speed reducing mechanism 300 to rotate, and at the moment, the outer hub 2 is linked with the cycloid speed reducing mechanism 300 through the clutch mechanism 400, so that the cycloid speed reducing mechanism 300 drives the outer hub 2 to rotate positively relative to the central shaft 1; when the outer hub 2 rotates reversely relative to the central shaft 1, the clutch mechanism 400 is separated so that the outer hub 2 is separated from the cycloid speed reducing mechanism 300, and the outer hub 2 rotates relative to the cycloid speed reducing mechanism 300. The motor adopts the two-stage speed reduction of the planetary transmission mechanism 200 and the cycloid speed reduction mechanism 300, meanwhile, the rotor assembly 100 is adopted to the planetary transmission mechanism 200 and then to the cycloid speed reduction mechanism 300, the speed reduction mechanism is stable, the stability of the transmission of the planetary transmission mechanism 200 can be ensured, the stable swing of the cycloid speed reduction mechanism 300 can also be ensured, the virtual rotation is prevented, the abrasion is reduced, the two-stage speed reduction ensures that the torque of the driving motor is large, the supporting capacity and the bearing capacity are strong, meanwhile, the central shaft 1 adopts a hollow design, the weight of the motor is reduced, the two-stage speed reduction structure is compact, the whole volume of the motor is small, the installation size is met, and the frame of most bicycles can be fit.
Furthermore, the rated torque of the motor is 45Nm, the weight is 1.1kg, the width of the outer hub 2 is 72mm, the width of the whole machine is 142mm, compared with the weight of 1.3kg or 1.7kg of the motor in the prior art, the weight is greatly reduced, and meanwhile, the torque is increased, the size is reduced, so that the motor is suitable for the use of frames of most bicycles.
As shown in fig. 1 to 6 and 8, in the present embodiment, the planetary transmission mechanism 200 includes a sun gear 3 fixedly connected to the rotor 10 of the rotor assembly 100 in the circumferential direction, and at least two planetary gears 4 circumferentially disposed around the sun gear 3, and the sun gear 3 is sandwiched between the planetary gears 4. Firstly, the rotor 10 drives the sun wheel 3 to rotate, so that the sun wheel 3 drives the planet wheels 4 and the planet wheels 4 drive the cycloid speed reducing mechanism 300, meanwhile, the sun wheel 3 is clamped between the planet wheels 4, the sun wheel 3 is always meshed with the planet wheels 4 under the clamping of at least two planet wheels 4, the transmission between the sun wheel 3 and the planet wheels 4 is stable, the occurrence of the transmission failure and the like between the two-stage speed reducing mechanisms of the planetary transmission mechanism 200 and the cycloid speed reducing mechanism 300 caused by the swinging of the cycloid speed reducing mechanism 300 can be effectively reduced, meanwhile, the abrasion of parts between the sun wheel 3 and the planet wheels 4 can be reduced, the virtual position rotation is prevented, the torque of a driving motor is large due to the two-stage speed reduction, and the supporting capacity and the bearing capacity are strong.
As shown in fig. 1 to 6 and 11, in the present embodiment, the rotor assembly 100 further includes a stator 11, the rotor 10 rotates relative to the stator 11, the rotor 10 includes a magnetizer 101 and a magnet 102 disposed in the magnetizer 101, and a magnetic slot 1011 for placing the magnet 102 is disposed on the magnetizer 101. The two adjacent magnetic grooves 1011 are arranged in a V shape, and the two ends of the magnetic groove 1011 in the length direction are respectively provided with a separation groove 1012 communicated with the magnetic groove 1011. Due to the structure and size limitation of the separation groove 1012, the magnetic flux passing through the separation groove 1012 is limited, the separation groove 1012 can reach a magnetic saturation state to generate a magnetic blockage phenomenon, and the magnetic field is separated, so that the rest magnetic force lines can not pass through the separation groove 1012 and can only reach an air gap through part of the transmission path of the magnetic rib 216 and be transmitted to the stator 11, thereby realizing electromagnetic induction. Therefore, by providing the above-described barrier 1012, most of the magnetic force lines can be ensured to pass through the transmission path, and the magnetic flux leakage can be reduced.
As shown in fig. 1 to 6 and 9 to 10, in the present embodiment, the cycloid reduction mechanism 300 includes a first cycloid gear 51, a second cycloid gear 52, an eccentric gear 53 disposed on the planet gear 4 for driving the first cycloid gear 51 and the second cycloid gear 52 to swing, and a sleeve 54 sleeved on the first cycloid gear 51 and the second cycloid gear 52, wherein the sleeve 54 is connected with the outer hub 2 through a clutch mechanism 400; when the sun gear 3 drives the planetary gear 4 to rotate, the first cycloid gear 51 and the second cycloid gear 52 swing to drive the shaft sleeve 54 and the outer hub 2 to rotate. Further, the first cycloid gear 51 and the second cycloid gear 52 are provided with external teeth, the inner wall of the sleeve 54 is provided with internal teeth meshed with the external teeth of the first cycloid gear 51 and the second cycloid gear 52, when the stator 11 is electrified, the rotor 10 drives the planet wheel 4 to rotate through the sun gear 3, and the first cycloid gear 51 and the second cycloid gear 52 are meshed with the internal teeth arranged at intervals in the circumferential direction on the sleeve 54 through respective external teeth to form an internal meshing speed reducing structure with a tooth difference of one tooth. When the sun gear 3 drives the planet gears 4 to rotate for one circle, the movement of the first cycloid gears 51 and the second cycloid gears 52 becomes planar movement with revolution and rotation due to the characteristics of the first cycloid gears 51 and the second cycloid gears 52 and the limitation of the inner teeth thereof. During the forward rotation of the planet wheel 4, the eccentric wheel 53 on the planet wheel 4 also rotates forward for one revolution, the first cycloid wheel 51 and the second cycloid wheel 52 rotate through one tooth in opposite directions, so that the speed is reduced, and the driving force is finally transmitted to the outer hub 2 through the shaft sleeve 54.
As shown in fig. 1 to 6 and 9 to 10, in the present embodiment, the cycloid reduction mechanism 300 further includes a first housing 55 for fixing the planetary gears 4 and a second housing 56 fixed to the first housing 55, the second housing 56 is provided with a chute 561, and a locking post 57 for locking with the central shaft 1 is provided in the chute 561. The matching of the chute 561 and the locking post 57 forms a clutch structure between the planetary transmission mechanism 200 and the cycloid speed reducing mechanism 300 and the central shaft 1, the planetary transmission mechanism 200 and the cycloid speed reducing mechanism 300 are firmly meshed with the central shaft 1, the axle center structure is simplified, and the production and manufacturing difficulty is reduced. Further, the chute 561 is inclined from outside to inside in the axial direction of the central shaft 1.
As shown in fig. 1 to 7 and 9 to 10, in the present embodiment, the clutch mechanism 400 includes a first helical gear 61 provided on the sleeve 54 and a clutch post 62 provided between the first helical gear 61 and the outer hub 2; when the shaft sleeve 54 rotates in the forward direction, the clutch post 62 is linked with the first helical gear 61 so that the first helical gear 61 drives the outer hub 2 to rotate in the forward direction through the clutch post 62; when the outer hub 2 rotates in the opposite direction with respect to the central shaft 1, the clutch post 62 moves on the first helical gear 61 to disconnect the outer hub 2 from the cycloidal reduction mechanism 300. The outer hub 2 is isolated from the rotor assembly 100, the planetary transmission mechanism 200 and the cycloid reduction mechanism 300, and in the non-energized operation state of the rotor assembly 100, the outer hub 2 is completely disengaged, thereby avoiding the generation of a resistance moment which hinders the movement of the outer hub 2 due to the electromagnetic induction phenomenon, and having no additional resistance when riding the electric bicycle, as the riding feeling of a common bicycle. And the use experience of the user is improved.
As shown in fig. 1 to 6 and 12, in the present embodiment, the outer hub 2 includes a hub main body 21 and an end cover 22 covering the hub main body 21, and the clutch post 62 is connected to the end cover 22. The tower comprises a central shaft 1, a tower base 9 and a connecting shell 91, wherein the tower base 9 is arranged at one end of the central shaft 1, and the tower base 9 is connected with the outer hub 2 through the connecting shell 91. The upper end of the connection shell 91 is provided with a second helical gear 911, and a third helical gear adapted to the second helical gear 911 is arranged in the tower foundation 9. When the foot pedal is used for driving, the tower foundation 9 is driven by the chain clockwise, and at the moment, the tower foundation 9 transmits power to the outer hub 2 through the connecting shell 91 so as to drive the wheels; because of the arrangement of the clutch mechanism 400, the tower foundation 9 drives the wheels, and power is not transmitted to the rotor assembly 100, the planetary transmission mechanism 200 and the cycloid reduction mechanism 300, namely, when the pedals are independently driven, the rotor assembly 100 is not driven to rotate, so that the generation of a resistance moment for preventing the outer hub 2 from moving due to the electromagnetic induction phenomenon is avoided.
Claims (10)
1. A drive motor, characterized by: comprising
A central shaft (1) which is hollow;
a rotor assembly (100) disposed on the central shaft (1);
a planetary transmission mechanism (200) connected to the rotor assembly (100);
A cycloid reduction mechanism (300) connected with the planetary transmission mechanism (200);
a clutch mechanism (400) connected with the cycloid speed reducing mechanism (300);
the outer hub (2) is rotatably arranged on the central shaft (1);
The outer hub (2) is connected with the cycloid speed reducing mechanism (300) through a clutch mechanism (400); when the rotor assembly (100) rotates, the planetary transmission mechanism (200) is driven to rotate, so that the planetary transmission mechanism (200) drives the cycloid speed reducing mechanism (300) to rotate, and at the moment, the outer hub (2) is linked with the cycloid speed reducing mechanism (300) through the clutch mechanism (400), so that the cycloid speed reducing mechanism (300) drives the outer hub (2) to rotate positively relative to the central shaft (1); when the outer hub (2) rotates reversely relative to the central shaft (1), the clutch mechanism (400) is separated so that the outer hub (2) is separated from the cycloid speed reducing mechanism (300), and the outer hub (2) rotates relative to the cycloid speed reducing mechanism (300).
2. The drive motor of claim 1, wherein: the planetary transmission mechanism (200) comprises a sun wheel (3) fixedly connected with the rotor (10) of the rotor assembly (100) in the circumferential direction and at least two planetary gears (4) which are arranged around the sun wheel (3), and the sun wheel (3) is clamped between the planetary gears (4).
3. The drive motor according to claim 2, wherein: the rotor assembly (100) further comprises a stator (11), the rotor (10) rotates relative to the stator (11), the rotor (10) comprises a magnetizer (101) and a magnet (102) arranged in the magnetizer (101), and a magnetic groove (1011) for placing the magnet (102) is formed in the magnetizer (101).
4. A drive motor as claimed in claim 3, characterized in that: the two adjacent magnetic grooves (1011) are arranged in a V shape, and the two ends of the magnetic grooves (1011) in the length direction are also respectively provided with a separation groove (1012) communicated with the magnetic grooves (1011).
5. The drive motor according to claim 2, wherein: the cycloid speed reducing mechanism (300) comprises a first cycloid wheel (51), a second cycloid wheel (52), an eccentric wheel (53) which is arranged on the planet wheel (4) and used for driving the first cycloid wheel (51) and the second cycloid wheel (52) to swing, and a shaft sleeve (54) which is sleeved on the first cycloid wheel (51) and the second cycloid wheel (52), wherein the shaft sleeve (54) is connected with the outer hub (2) through a clutch mechanism (400); when the sun gear (3) drives the planet gears (4) to rotate, the first cycloid gear (51) and the second cycloid gear (52) swing to drive the shaft sleeve (54) and the outer hub (2) to rotate.
6. The drive motor of claim 5, wherein: the cycloid speed reducing mechanism (300) further comprises a first shell (55) used for fixing the planet gears (4) and a second shell (56) fixed on the first shell (55), the second shell (56) is provided with a chute (561), and a locking column (57) used for being clamped with the central shaft (1) is arranged in the chute (561).
7. The drive motor of claim 6, wherein: the clutch mechanism (400) comprises a first helical tooth (61) arranged on the shaft sleeve (54) and a clutch post (62) arranged between the first helical tooth (61) and the outer hub (2); when the shaft sleeve (54) rotates positively, the clutch post (62) is linked with the first helical gear (61) so that the first helical gear (61) drives the outer hub (2) to rotate positively through the clutch post (62); when the outer hub (2) rotates reversely relative to the central shaft (1), the clutch post (62) moves on the first helical tooth (61) to disconnect the outer hub (2) from the cycloidal reduction mechanism (300).
8. The drive motor of claim 7, wherein: the outer hub (2) comprises a hub main body (21) and an upper end cover (22) covered on the hub main body (21), and the clutch post (62) is connected with the end cover (22).
9. A drive motor according to any one of claims 1-8, characterized in that: the novel tower comprises a central shaft (1), and is characterized by further comprising a tower base (9), wherein the tower base (9) is arranged at one end of the central shaft (1), and the tower base (9) is connected with an outer hub (2) through a connecting shell (91).
10. The drive motor of claim 9, wherein: the upper end of the connecting shell (91) is provided with a second helical tooth (911), and a third helical tooth matched with the second helical tooth (911) is arranged in the tower foundation (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410222712.1A CN118074421A (en) | 2024-02-28 | 2024-02-28 | Driving motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410222712.1A CN118074421A (en) | 2024-02-28 | 2024-02-28 | Driving motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118074421A true CN118074421A (en) | 2024-05-24 |
Family
ID=91107166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410222712.1A Pending CN118074421A (en) | 2024-02-28 | 2024-02-28 | Driving motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118074421A (en) |
-
2024
- 2024-02-28 CN CN202410222712.1A patent/CN118074421A/en active Pending
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