CN218888317U - Cam type overrunning clutch, motor and moped using motor - Google Patents
Cam type overrunning clutch, motor and moped using motor Download PDFInfo
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- CN218888317U CN218888317U CN202320151190.1U CN202320151190U CN218888317U CN 218888317 U CN218888317 U CN 218888317U CN 202320151190 U CN202320151190 U CN 202320151190U CN 218888317 U CN218888317 U CN 218888317U
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- gear ring
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- outer gear
- cam
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Abstract
The utility model relates to a cam-type freewheel clutch and motor and use vehicle using motor's vehicle using motor, cam-type freewheel clutch includes: the outer gear ring is arranged on the inner wall of the motor hub, a plurality of cam one-way track grooves and a plurality of clamp spring grooves are formed in the inner wall of the outer gear ring, and a plurality of power output bosses are arranged on the outer wall of the outer gear ring; the power output boss is used for limiting and adapting to a motor hub during assembly, the inner gear ring is coaxially arranged with the outer gear ring, the roller is movably arranged between the outer gear ring and the inner gear ring and falls into the cam one-way track groove, the cover plate is pressed between the roller and the end cover, the clamp spring is limited on one side of the outer gear ring and the inner gear ring, which is far away from the end cover, and the outer gear ring, the inner gear ring and the motor hub are arranged in a clearance mode. When the motor of the utility model operates, the outer gear ring is pushed to realize power output; when the motor does not work and slides freely, the outer gear ring rotates freely along with the hub, and is not influenced by partial resistance of the motor. The riding comfort is improved.
Description
Technical Field
The utility model belongs to the technical field of vehicle using motor clutch technique and specifically relates to a cam type freewheel clutch and motor and use vehicle using motor's vehicle using motor.
Background
Along with the popularization of the moped, the attention on a power system of the moped is higher and higher, and particularly, a motor part is particularly important as a power source of a whole vehicle.
At present, a motor of a power-assisted bicycle is generally divided into two states of a state with an overrunning clutch and a state without the overrunning clutch, and the motor without the overrunning clutch is influenced by torque fluctuation and can influence riding sense.
When the power-assisted bicycle slides, the motor does not work, the sliding distance is shortened, and the power-assisted bicycle can continue to run only by the intervention of other kinetic energy.
SUMMERY OF THE UTILITY MODEL
The applicant aims at the defects in the prior art and provides a cam type overrunning clutch with a reasonable structure, a motor and a moped using the motor, wherein the overrunning clutch is arranged in the motor, the influence of the cogging torque of the motor is avoided during sliding, the motor is changed from direct output of an inner gear ring to output of the inner gear ring through the cam type overrunning clutch during running, and the structure is stable; thereby prolonging the sliding distance of the moped.
The utility model discloses the technical scheme who adopts as follows:
a cam type overrunning clutch is installed in a motor hub, and the motor hub and an end cover of the motor hub are used as installation bases; the cam type overrunning clutch comprises:
the outer gear ring is arranged on the inner wall of the hub of the motor, a plurality of cam one-way track grooves and a plurality of clamp spring grooves are formed in the inner wall of the outer gear ring, and a plurality of power output bosses are arranged on the outer wall of the outer gear ring; the power output boss is used for limiting and adapting to the motor hub during assembly,
the inner gear ring is coaxially arranged with the outer gear ring,
the roller is movably arranged between the outer gear ring and the inner gear ring and falls in the cam one-way track groove,
a cover plate which is pressed between the roller and the end cover,
the clamp spring is limited at one side of the outer gear ring and the inner gear ring, which is far away from the end cover,
and the outer gear ring, the inner gear ring and the motor hub are arranged in a clearance manner.
As a further improvement of the above technical solution:
the opening part of the motor hub close to the end cover is concave inwards to form a step surface, and the outer circle surface of the outer gear ring is arranged in a protruding mode and is embedded into the step surface of the motor hub.
And one side of the end cover facing the outer gear ring is extended and formed with a limiting flanging, and the limiting flanging is pressed on the end surface of the outer gear ring.
The outer circle surface of the cover plate is attached to the inner wall of the limiting flanging, and two end faces of the cover plate are respectively contacted with the inner wall of the end cover and the end face of the roller.
One side of the end cover facing the motor hub is formed into a stepped surface which is concave step by step, and the mouth part of the motor hub is matched with the mouth part of the end cover to form a limiting cavity; the outer gear ring is formed with a power output boss falling in the limit cavity.
The end face of one side of the outer gear ring facing the end cover is connected with one stepped face of the end cover, and the cover plate is connected with the other stepped face of the end cover.
The outer circle surface of the end cover, the outer circle surface of the outer gear ring and the outer circle surface of the motor hub are arranged in a coplanar manner; and a bearing flanging is formed on one side of the end cover facing the outer gear ring, the outer gear ring falls on the bearing flanging, and the bearing flanging is connected with the cover plate.
The rollers are rollers or balls.
A motor comprises the cam type overrunning clutch, and a planetary gear of the motor is meshed with the tooth surface of an inner gear ring.
A moped using a motor comprises the motor.
The utility model has the advantages as follows:
the utility model has compact and reasonable structure, according to the characteristics of the motor, when the motor runs, the motor needs to output power to the wheel hub, at the moment, the cam type overrunning clutch inside the motor drives the power to the roller through the inner gear ring, and the roller is in contact fit with the outer gear ring track to push the outer gear ring to realize power output;
when the motor of the power-assisted bicycle does not work and slides freely, the roller and the outer gear ring only contact without extrusion and do not work, and the outer gear ring rotates freely along with the hub, so that the power-assisted bicycle can still slide clockwise by means of inertia and is not influenced by partial resistance of a motor. Namely: the influence of motor tooth space torque is avoided, the sliding distance is increased, and the riding comfort is improved.
The utility model discloses in, there is the clearance outer ring gear between ring gear and motor wheel hub, is in the floating condition, when guaranteeing to travel the function normal, and ring gear, motor wheel hub between need not accurate assembly, simplified assembly process, reduced motor running noise.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an enlarged view of a portion a of fig. 1 to show a structure of the cam type overrunning clutch.
Fig. 3 is an axial view of the cam-type overrunning clutch of fig. 1.
Fig. 4 is an exploded view of the cam-type overrunning clutch according to the present invention.
Fig. 5 is a schematic overall structure diagram of another embodiment of the present invention.
Fig. 6 is an enlarged view of a portion B of fig. 5 to show a structure of a cam type overrunning clutch according to another embodiment.
Fig. 7 is a schematic overall structure diagram of another embodiment of the present invention.
Fig. 8 is an enlarged view of a portion C of fig. 7 to show the structure of the cam type overrunning clutch according to the third embodiment.
Wherein: 1. a motor hub; 2. an end cap; 3. an outer ring gear; 4. an inner gear ring; 5. a roller; 6. a cover plate; 7. a clamp spring;
201. limiting and flanging; 202. supporting the flanging;
301. a cam one-way track groove; 302. a clamp spring slot; 303. a power output boss; 303. and a power output boss.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 8, the cam type overrunning clutch of the present embodiment is installed in a motor hub 1, and the motor hub 1 and an end cover 2 of the motor hub 1 are used as an installation base; the cam type overrunning clutch comprises:
the outer gear ring 3 is arranged on the inner wall of the motor hub 1, a plurality of cam one-way track grooves 301 and a plurality of clamp spring grooves 302 are formed in the inner wall of the outer gear ring 3, and a plurality of power output bosses 303 are arranged on the outer wall of the outer gear ring 3; the power output boss 303 is used for spacing and matching with the motor hub 1 during assembly,
an inner gear ring 4 arranged coaxially with the outer gear ring 3,
the roller 5 is movably arranged between the outer gear ring 3 and the inner gear ring 4 and falls in the cam one-way track groove 301,
a cover plate 6 which is pressed between the roller 5 and the end cover 2,
the clamp spring 7 is limited at one side of the outer gear ring 3 and the inner gear ring 4 which are far away from the end cover 2,
the outer gear ring 3, the inner gear ring 4 and the motor hub 1 are arranged in a clearance mode.
The opening part of the motor hub 1 close to the end cover 2 is recessed inwards to form a step surface, and the outer circular surface of the outer gear ring 3 is arranged in a protruding mode and is embedded into the step surface of the motor hub 1.
The side of the end cover 2 facing the external gear ring 3 is extended and formed with a limit flange 201, and the limit flange 201 is pressed on the end face of the external gear ring 3.
The outer circle surface of the cover plate 6 is attached to the inner wall of the limiting flange 201, and two end faces of the cover plate 6 are respectively contacted with the inner wall of the end cover 2 and the end face of the roller 5.
One side of the end cover 2 facing the motor hub 1 is formed into a step-by-step inwards concave step surface, and the mouth part of the motor hub 1 is matched with the mouth part of the end cover 2 to form a limiting cavity; the outer gear ring 3 is formed with a power output boss 303 which falls in the limit cavity.
The end face of one side of the outer gear ring 3 facing the end cover 2 is connected with one stepped face of the end cover 2, and the cover plate 6 is connected with the other stepped face of the end cover 2.
The outer circle surface of the end cover 2, the outer circle surface of the outer gear ring 3 and the outer circle surface of the motor hub 1 are arranged in a coplanar manner; the side of the end cover 2 facing the outer gear ring 3 is formed with a support flange 202, the outer gear ring 3 falls on the support flange 202, and the support flange 202 is connected with the cover plate 6.
The rollers 5 are rollers or balls.
The motor of the embodiment comprises the cam type overrunning clutch, and a planetary gear of the motor is meshed with the tooth surface of the inner gear ring 4.
The moped using the motor of the embodiment includes the motor as described above.
The utility model discloses a concrete structure and theory of operation as follows:
the first embodiment is as follows:
the embodiment discloses a cam type overrunning clutch which is installed in a motor hub 1 and comprises an outer gear ring 3, an inner gear ring 4, a roller 5, a cover plate 6 and a clamp spring, wherein the cover plate 6 and the clamp spring are pressed at two ends of the outer gear ring 3, the inner gear ring 4 and the roller 5.
The rollers 5 may be rollers or balls, and roll in the cam one-way track grooves 301 of the outer ring gear 3. Besides the cam one-way track groove 301, a clamp spring groove 302 is further formed in the inner wall of the outer gear ring 3, and the clamp spring groove 302 is used for limiting a clamp spring.
Six power output bosses 303 are arranged on the outer circle surface of the outer gear ring 3 in an annular array mode, the power output bosses 303 are matched with rib plate grooves in the inner wall of the motor hub 1, and the power output bosses 303 are embedded into the grooves during assembly.
The outer circle surface of the inner gear ring 4 is a roller 5 contact surface, and the outer ring of the inner gear ring 4 is a step surface.
When the outer gear ring 3 and the inner gear ring 4 are assembled, sixteen rollers 5 are installed in the cam guide track grooves, the cover plate 6 is fixed at the axial positions of the inner gear ring 4 and the outer gear ring 3, and the rollers 5 are fixed and limited by the step surface of the inner gear ring 4, the outer gear ring 3 and the end cover 2. At this time, the roller 5 is in contact with and engaged with the cam one-way track groove 301 and the step surface of the ring gear 4.
When the planetary gear in the motor starts to rotate, the inner gear ring 4 is driven to rotate clockwise, and the inner gear ring 4 drives the roller 5 to rotate clockwise; because the cam one-way track groove 301 is an arc-shaped groove with an angle and a space smaller than the diameter of the roller 5, when the roller 5 contacts the arc-shaped surface of the cam one-way track groove 301, because the one-way track groove does not have enough space to allow the roller 5 to freely rotate, the roller 5 and the cam one-way track groove 301 form an extrusion and meshing state, so that force is applied to the outer gear ring 3 to push the outer gear ring 3 to rotate; the power output boss 303 on the external gear ring 3 pushes the motor hub 1 to rotate.
When the motor stops outputting, the inner gear ring 4 stops rotating, the rim drives the outer gear ring 3 to rotate inertially through the power output boss 303, and the roller 5 in the cam one-way track groove 301 is in a free state. At this time, the inner gear ring 4 does not rotate, and the outer gear ring 3 slides normally.
Example two:
the difference from the first embodiment is that, in the first embodiment, the inside of the end cover 2 is a stepped surface, there are two steps, the mouth portion of the motor hub 1 and the mouth portion of the end cover 2 cooperate to form a cavity for limiting the outer gear ring 3, and the power output boss 303 on the outer gear ring 3 falls in the cavity.
The outer gear ring 3 and the cover plate 6 are respectively connected with two stepped surfaces inside the end cover 2.
Example three:
the difference between the first embodiment and the second embodiment is that in the present embodiment, the end cap 2 is formed with a support flange 202, and the whole end cap 2 tends to be a plane; after the assembly is completed, the outer ring of the end cover 2, the outer ring of the outer gear ring 3 and the outer circle surface of the motor hub 1 are coplanar to form a cylindrical surface. The outer gear ring 3 is limited by the bearing flange 202.
As an alternative to the above embodiment, in an embodiment of the present invention, the number of the rollers 5 may be 3-30, and the rollers 5 are required to be arranged in a circular array; the number of cam one-way track grooves 301 is equal to the number of rollers 5.
In one embodiment of the utility model, the power output boss 303 takes 2-20 values.
As an alternative to the assembly between the external toothing 3 and the motor hub 1, the external toothing 3 can also be assembled by screwing to the motor housing. The motor housing refers to an assembly of the motor end cover 2 and the motor hub 1.
In the assembly mode, the outer gear ring 3 in the first embodiment and the second embodiment always keeps a gap between the inner gear ring 4 and the motor hub 1, so that the outer gear ring 3 is in a floating state, the driving function is ensured to be normal, meanwhile, the outer gear ring is not required to be accurately assembled with the inner gear ring 4 and the motor hub 1, and the assembly process is simplified; meanwhile, the integral noise of the motor is greatly reduced;
in the second embodiment, the outer gear ring 3 and the motor hub 1 are fixedly assembled, and the relative position of the outer gear ring 3 is unchanged, so that the end cover 2 and the motor hub 1 are kept in a coaxial state.
The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.
Claims (10)
1. A cam-type overrunning clutch, comprising: the motor hub (1) is arranged in the motor hub (1), and the motor hub (1) and an end cover (2) of the motor hub (1) are used as an installation foundation; the cam type overrunning clutch comprises:
the outer gear ring (3) is mounted on the inner wall of the motor hub (1), a plurality of cam one-way track grooves (301) and clamp spring grooves (302) are formed in the inner wall of the outer gear ring (3), and a plurality of power output bosses (303) are formed in the outer wall of the outer gear ring (3); the power output boss (303) is used for limiting and adapting to the motor hub (1) during assembly,
an inner gear ring (4) which is coaxially arranged with the outer gear ring (3),
the roller (5) is movably arranged between the outer gear ring (3) and the inner gear ring (4) and falls into the cam one-way track groove (301),
a cover plate (6) which is pressed between the roller (5) and the end cover (2),
the clamp spring (7) is limited at one side of the outer gear ring (3) and the inner gear ring (4) which is far away from the end cover (2),
and gaps are arranged among the outer gear ring (3), the inner gear ring (4) and the motor hub (1).
2. The cam overrunning clutch according to claim 1, wherein: the opening part of the motor hub (1) close to the end cover (2) is concave inwards to form a step surface, and the outer circle surface of the outer gear ring (3) is convexly arranged and embedded into the step surface of the motor hub (1).
3. The cam overrunning clutch according to claim 2, wherein: one side of the end cover (2) facing the outer gear ring (3) is extended and formed with a limiting flanging (201), and the limiting flanging (201) is pressed on the end face of the outer gear ring (3).
4. The cam overrunning clutch according to claim 3, wherein: the outer circle surface of the cover plate (6) is attached to the inner wall of the limiting flanging (201), and two end faces of the cover plate (6) are respectively contacted with the inner wall of the end cover (2) and the end face of the roller (5).
5. The cam overrunning clutch according to claim 1, wherein: one side, facing the motor hub (1), of the end cover (2) is formed into a step-by-step inwards concave stepped surface, and the mouth part of the motor hub (1) is matched with the mouth part of the end cover (2) to form a limiting cavity; a power output boss (303) falling into the limiting cavity is formed on the outer gear ring (3).
6. The cam overrunning clutch according to claim 5, wherein: the end face of one side of the outer gear ring (3) facing the end cover (2) is connected with one stepped surface of the end cover (2), and the cover plate (6) is connected with the other stepped surface of the end cover (2).
7. The cam overrunning clutch according to claim 1, wherein: the outer circle surface of the end cover (2), the outer circle surface of the outer gear ring (3) and the outer circle surface of the motor hub (1) are arranged in a coplanar manner; one side of the end cover (2) facing the outer gear ring (3) is formed with a bearing flange (202), the outer gear ring (3) falls on the bearing flange (202), and the bearing flange (202) is connected with the cover plate (6).
8. The cam overrunning clutch according to claim 1, wherein: the rollers (5) adopt rollers or balls.
9. An electric machine, characterized in that it comprises a cam-type overrunning clutch according to claim 1, the planetary gears of which are in engagement with the tooth flanks of the inner ring gear (4).
10. A power-assisted vehicle using a motor, characterized by comprising the motor according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320151190.1U CN218888317U (en) | 2023-01-29 | 2023-01-29 | Cam type overrunning clutch, motor and moped using motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320151190.1U CN218888317U (en) | 2023-01-29 | 2023-01-29 | Cam type overrunning clutch, motor and moped using motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218888317U true CN218888317U (en) | 2023-04-18 |
Family
ID=85978391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320151190.1U Active CN218888317U (en) | 2023-01-29 | 2023-01-29 | Cam type overrunning clutch, motor and moped using motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218888317U (en) |
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2023
- 2023-01-29 CN CN202320151190.1U patent/CN218888317U/en active Active
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