CN214823908U - Middle-mounted motor transmission mechanism, electric moped driving system and electric moped - Google Patents
Middle-mounted motor transmission mechanism, electric moped driving system and electric moped Download PDFInfo
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- CN214823908U CN214823908U CN202121088383.4U CN202121088383U CN214823908U CN 214823908 U CN214823908 U CN 214823908U CN 202121088383 U CN202121088383 U CN 202121088383U CN 214823908 U CN214823908 U CN 214823908U
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Abstract
The utility model relates to an electric bicycle technical field especially relates to an in put motor drive mechanism, electric bicycle actuating system and electric bicycle. The middle motor transmission mechanism comprises a middle shaft, an input gear, an output gear, a clutch and a middle shaft support bearing, wherein the input gear is used for being meshed with an output gear of the speed reducer, and the output gear is used for transmitting power to the chain wheel; the clutch is sleeved on the middle shaft and is in transmission connection with the middle shaft; the output gear is sleeved on the clutch and is in transmission connection with the clutch; the stepped matching surfaces of the middle shaft support bearing and the middle shaft are respectively positioned at two ends of the output gear and used for limiting the output gear; the input gear is fixed on the middle shaft, and the output gear is limited by the aid of the stepped matching surface on the middle shaft and the middle shaft supporting bearing, so that the input gear and the output gear can be positioned without increasing the size of the middle shaft, accuracy in positioning is guaranteed, and transmission noise is reduced.
Description
Technical Field
The utility model relates to an electric bicycle technical field especially relates to an in put motor drive mechanism, electric bicycle actuating system and electric bicycle.
Background
The electric moped can realize two driving modes of manpower driving and electric power-assisted driving, and can provide corresponding electric power-assisted support according to different proportions according to the force of treading the pedal by a rider. The electric power assistance of the electric power-assisted vehicle generally comprises two forms, one is that the electric power assistance is realized by utilizing a hub motor, the hub motor is that a motor is integrated and arranged in a drum barrel, and the motor converts electric energy into mechanical energy after being electrified so as to drive wheels to rotate; the other type is that the electric power assistance is realized by using a middle-arranged motor, the middle-arranged motor needs to transmit the power output by the motor to an output shaft of the electric power-assisted vehicle through a transmission mechanism, then the power is transmitted to the chain wheel through the output shaft, and finally the power of the chain wheel is transmitted to the wheels through a chain, so that the rotation of the wheels is realized.
As shown in fig. 1, the conventional middle motor transmission mechanism includes a middle shaft 1 ', an input gear 2', an output gear 3 'and a clutch 4', wherein the input gear 2 'is in transmission connection with the middle shaft 1' through the clutch 4 ', the output gear 3' is integrally formed with the middle shaft 1 ', the input gear 100' of the speed reducer is in transmission fit with the output end of the middle motor, and transmits the power of the middle motor to the input gear 2 'through the output gear (not shown) of the speed reducer, so as to drive the middle shaft 1' to rotate and drive the output gear 3 'to rotate through the clutch 4', and finally output the power to a chain wheel, thereby realizing the electric drive of the electric power-assisted vehicle. The input gear 2 'generates radial force, tangential force and axial force during the process of transmitting power (torque and rotation speed), wherein the radial force and circumferential tangential force are mainly supported and received by the cylindrical matching surfaces of the clutch' 4 and the middle shaft 1 ', the axial force is mainly received by the stepped matching surface of the middle shaft 1', the forces are transmitted to the shaft section of the output gear 3 ', and the radial force, tangential force and axial force existing in the shaft section of the output gear 3' are received by the bearings arranged at the two ends of the shaft section.
The design mode of the transmission mechanism of the centrally-mounted motor has the following problems: 1) when the clutch 4 'is a wedge type clutch, the clutch 4' has no centering function, the centering of the input gear 2 'is mainly performed by the cylindrical matching surface of the middle shaft 1', and the cylindrical matching surface of the middle shaft 1 'is easily abraded due to the relative motion of the input gear 2' and the middle shaft 1 ', so that the problems of inaccurate positioning, high vibration noise and the like of the input gear 2' are further caused. 2) When the clutch 4 'is an integrated clutch, the size of the integrated clutch is far larger than that of a wedge clutch under the condition of transmitting the same torque, and the size of the integrated clutch is possibly larger than that of the wedge clutch, and if the clutch 4' is prevented from interfering with the input gear 100 'of the speed reducer, the length of the middle shaft 1' needs to be increased, so that the size of the whole mechanism is larger, and the requirement of an installation space cannot be met.
Therefore, a mid-motor transmission mechanism is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide an in put motor drive mechanism can realize the location to drive gear under the condition that does not increase the whole size of mechanism, guarantees that drive gear location is accurate, reduces the transmission noise.
A second object of the present invention is to provide a driving system for electric bicycle, which comprises a motor driving mechanism with a small size and a small noise.
A third object of the present invention is to provide an electric bicycle, which has the advantages of compact structure, small size of the whole device, and low noise in power transmission, by using the driving system of the electric bicycle.
In order to realize the purpose, the following technical scheme is provided:
in a first aspect, a mid-motor transmission mechanism is provided, including:
the middle shaft is provided with a step matching surface;
the input gear is coaxially and fixedly connected with the middle shaft and is used for being meshed with the output gear of the speed reducer;
the clutch is sleeved on the middle shaft and is in transmission connection with the middle shaft;
the output gear is sleeved on the clutch and is in transmission connection with the clutch, and the output gear is used for transmitting power to the chain wheel;
and the middle shaft support bearing and the step matching surface are respectively positioned at two ends of the output gear and used for limiting the output gear.
As an alternative to the mid-motor transmission mechanism, the mid-motor transmission mechanism further includes a spacer provided between the mid-shaft support bearing and the output gear.
As an alternative of the middle-placed motor transmission mechanism, the middle-placed motor transmission mechanism further comprises a first limiting bearing, and the first limiting bearing is arranged at each of two ends of the clutch.
As an alternative to the centrally-mounted motor drive, the first limit bearing is located between the output gear and the central shaft.
As an alternative of the middle-placed motor transmission mechanism, the middle-placed motor transmission mechanism further comprises a clamp spring, and the clamp spring is arranged between the first limiting bearing close to the step matching surface and the clutch.
As an alternative of the middle-mounted motor transmission mechanism, a limiting groove is formed in the inner wall of the output gear, and the clamp spring is accommodated in the limiting groove.
As an alternative of the middle-mounted motor transmission mechanism, the input gear and the middle shaft are of an integrally formed structure.
As an alternative of the middle-placed motor transmission mechanism, the input gear and the step matching surface are arranged at intervals, and the intervals are used for accommodating the input gear of the speed reducer.
In a second aspect, a driving system of an electric moped is provided, which comprises a mid-motor, a speed reducer and the mid-motor transmission mechanism.
In a third aspect, an electric bicycle is provided, which comprises the driving system of the electric bicycle.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a middle motor transmission mechanism, which comprises a middle shaft, an input gear, an output gear, a clutch and a middle shaft support bearing, wherein the input gear is engaged with the output gear of a speed reducer, and the output gear is used for transmitting power to a chain wheel; the middle shaft is provided with a step matching surface; the input gear is coaxially and fixedly connected with the middle shaft; the clutch is sleeved on the middle shaft and is in transmission connection with the middle shaft; the output gear is sleeved on the clutch and is in transmission connection with the clutch; the middle shaft support bearing and the step matching surface are respectively positioned at two ends of the output gear and used for limiting the output gear. The middle motor transmission mechanism fixes the input gear on the middle shaft, the output gear is in transmission connection with the middle shaft through the clutch, and the output gear is limited by the stepped matching surface on the middle shaft and the middle shaft supporting bearing, so that the input gear and the output gear can be positioned under the condition of not increasing the size of the middle shaft, the positioning accuracy is ensured, and the transmission noise is reduced.
The utility model provides an electric bicycle actuating system through putting motor drive mechanism in using the above-mentioned, compact structure, whole quick-witted size are little, power transmission noise is little.
The utility model provides an electric bicycle has compact structure, whole quick-witted size is little, power transmission noise advantage such as little through using above-mentioned electric bicycle actuating system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a mid-motor transmission mechanism in the prior art;
fig. 2 is a schematic structural diagram of a mid-motor transmission mechanism provided in an embodiment of the present invention;
fig. 3 is a cross-sectional view of a mid-motor transmission mechanism provided in an embodiment of the present invention;
fig. 4 is an exploded schematic view of a middle motor transmission mechanism provided in the embodiment of the present invention.
Reference numerals:
100-reducer input gear; 200-reducer output gear;
1-medial axis; 11-stepped mating surfaces;
2-an input gear;
3-an output gear;
4-a clutch;
5-a central shaft support bearing;
6-a first limit bearing;
7-a clamp spring;
8-a gasket;
9-second limit bearing.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is further described below by referring to the drawings and the detailed description.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; the connection can be mechanical connection or other connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The embodiment provides an electric moped driving system which comprises a middle-arranged motor, a speed reducer and a middle-arranged motor transmission mechanism. The speed reducer comprises a speed reducer input gear 100 and a speed reducer output gear 200, the speed reducer input gear 100 is in transmission connection with the output end of the middle-placed motor, the speed reducer output gear 200 is used for transmitting power to the middle-placed motor transmission mechanism, and then the middle-placed motor transmission mechanism transmits the power to the chain wheel, so that electric driving of the electric moped is achieved.
As shown in fig. 2-4, the centrally-mounted motor transmission mechanism provided in this embodiment includes a central shaft 1, an input gear 2, an output gear 3, a clutch 4 and a central shaft support bearing 5, wherein the input gear 2 is used for meshing with a reducer output gear 200, and the output gear 3 is used for transmitting power to a chain wheel; the middle shaft 1 is provided with a step matching surface 11; the input gear 2 is coaxially and fixedly connected with the middle shaft 1; the clutch 4 is sleeved on the middle shaft 1 and is in transmission connection with the middle shaft 1; the output gear 3 is sleeved on the clutch 4 and is in transmission connection with the clutch 4; the middle shaft support bearing 5 and the step matching surface 11 are respectively positioned at two ends of the output gear 3 and used for limiting the output gear 3. The middle motor transmission mechanism fixes the input gear 2 on the middle shaft 1, the output gear 3 is in transmission connection with the middle shaft 1 through the clutch 4, and the output gear 3 is limited by the step matching surface 11 on the middle shaft 1 and the middle shaft support bearing 5, so that the input gear 2 and the output gear 3 can be positioned under the condition that the size of the middle shaft 1 is not increased, the positioning accuracy is ensured, and the transmission noise is reduced.
In normal operation, the input gear 2 receives power input from the output gear 200 of the speed reducer, the input gear 2 rotates and drives the clutch 4 to operate, the clutch 4 further drives the output gear 3 to rotate, and the output gear 3 outputs power to the toothed disc through a gear matched with the output gear 3. In the process of transmitting power by the output gear 3, axial force can be generated and can be born by the step matching surface 11 and the middle shaft support bearing 5 so as to limit the output gear 3, ensure accurate positioning and reduce power transmission noise.
Preferably, the input gear 2 is spaced from the stepped mating surface 11, and the spacing is used for accommodating the input gear 100 of the speed reducer, so that the layout space of the middle shaft 1 is fully utilized, and the size of the whole machine is reduced.
Illustratively, the clutch 4 may be a sprag type clutch, and the clutch 4 is a one-way clutch.
Preferably, the middle motor transmission mechanism further comprises a first limit bearing 6 and a second limit bearing 9, wherein the first limit bearing 6 and the second limit bearing 9 are respectively arranged at two ends of the clutch 4 and used for axially limiting the clutch 4. In the power transmission process of the output gear 3, radial force and tangential force can be generated, wherein the radial force and the tangential force are mainly born by the first limit bearing 6 and the second limit bearing 9, the clutch 4 is not required to bear, and the problem that the wedge block of the clutch 4 is stressed and inclined inconsistently to cause the eccentric center shaft 1 matched with the wedge block to be eccentric, so that the clutch 4 cannot work smoothly or cannot work is avoided. In addition, the axial force generated by the output gear 3 can be transmitted to the input gear 2 through the stepped matching surface 11 without being borne by the first limiting bearing 6 and the second limiting bearing 9, so that the working stress of the first limiting bearing 6 and the second limiting bearing 9 is reduced, and the service life of the input gear is prolonged.
Preferably, the first limit bearing 6 and the second limit bearing 9 are both located between the output gear 3 and the central shaft 1. Namely, the first limit bearing 6 and the second limit bearing 9 are positioned inside the output gear 3 and outside the middle shaft 1, and bearings with smaller outer diameters can be selected to meet the space layout requirement.
In this embodiment, the output gear 3 is provided with a stepped hole therein, and the diameter of the shaft section provided with the first limit bearing 6 and the clutch 4 is larger than that of the shaft section provided with the second limit bearing 9, so that the design can limit the clutch 4 and ensure the structural strength of the output gear 3 under the condition of reducing the diameter of the output gear 3.
For example, the first limit bearing 6 and the second limit bearing 9 may be different types of bearings, and may also be different types of bearings. In this embodiment, the first limit bearing 6 located near the step matching surface 11 is a ball bearing, and the other second limit bearing 9 is a needle bearing.
Optionally, in order to limit the axial direction of the clutch 4, the middle-placed motor transmission mechanism further comprises a clamp spring 7, and the clamp spring 7 is arranged between the first limit bearing 6 close to the step matching surface 11 and the clutch 4.
Optionally, a limiting groove is formed in the inner wall of the output gear 3, and the clamp spring 7 is accommodated in the limiting groove, so that the relative position of the clutch 4 and the output gear 3 is unchanged, and the power transmission effect is guaranteed.
Preferably, the middle motor transmission mechanism further comprises a gasket 8, and the gasket 8 is arranged between the middle shaft support bearing 5 and the output gear 3. Through set up gasket 8 between axis support bearing 5 and output gear 3, can carry out axial spacing to second spacing bearing 9 and output gear 3, improve transmission stationarity. In addition, the abrasion of the centering shaft supporting bearing 5 can be reduced, and the service life of parts can be prolonged.
Optionally, the input gear 2 and the middle shaft 1 are of an integrally formed structure, so that coaxial transmission of the input gear 2 and the middle shaft 1 can be ensured, accurate positioning of the input gear 2 can be ensured, and a transmission effect is ensured.
The embodiment also provides an electric moped, which comprises the electric moped driving system, and the electric moped has the advantages of compact structure and smaller size by applying the electric moped driving system.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A mid-motor transmission mechanism is characterized by comprising:
the middle shaft (1) is provided with a step matching surface (11);
the input gear (2) is coaxially and fixedly connected with the middle shaft (1), and the input gear (2) is used for being meshed with an output gear (200) of the speed reducer;
the clutch (4) is sleeved on the middle shaft (1) and is in transmission connection with the middle shaft (1);
the output gear (3) is sleeved on the clutch (4) and is in transmission connection with the clutch (4), and the output gear (3) is used for transmitting power to the chain wheel;
and the middle shaft support bearing (5) and the step matching surface (11) are respectively positioned at two ends of the output gear (3) and used for limiting the output gear (3).
2. The centrally-mounted motor drive according to claim 1, characterized in that it further comprises a spacer (8), said spacer (8) being arranged between the central shaft support bearing (5) and the output gear (3).
3. The centrally-mounted motor transmission mechanism according to claim 1, further comprising a first limit bearing (6) and a second limit bearing (9), wherein the first limit bearing (6) and the second limit bearing (9) are respectively arranged at two ends of the clutch (4).
4. The centrally-mounted motor drive according to claim 3, characterized in that the first limit bearing (6) and the second limit bearing (9) are both located between the output gear (3) and the central shaft (1).
5. The centrally-mounted motor drive according to claim 3, characterized in that it further comprises a circlip (7), said circlip (7) being arranged between the first limit bearing (6) and the clutch (4).
6. The transmission mechanism of the mid-motor according to claim 5, wherein a limiting groove is formed on the inner wall of the output gear (3), and the clamp spring (7) is accommodated in the limiting groove.
7. The centrally-mounted motor drive mechanism according to any one of claims 1 to 6, characterized in that the input gear (2) and the middle shaft (1) are of an integrally formed structure.
8. The centrally-mounted motor drive according to claim 7, characterized in that the input gear (2) is spaced from the stepped mating surface (11), the spacing being adapted to receive a reducer input gear (100).
9. An electric bicycle driving system, characterized in that, comprises a built-in motor, a speed reducer and the built-in motor transmission mechanism of any one of claims 1 to 8.
10. An electrically assisted vehicle, characterized by comprising the drive system of an electrically assisted vehicle according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121088383.4U CN214823908U (en) | 2021-05-20 | 2021-05-20 | Middle-mounted motor transmission mechanism, electric moped driving system and electric moped |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121088383.4U CN214823908U (en) | 2021-05-20 | 2021-05-20 | Middle-mounted motor transmission mechanism, electric moped driving system and electric moped |
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| Publication Number | Publication Date |
|---|---|
| CN214823908U true CN214823908U (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121088383.4U Active CN214823908U (en) | 2021-05-20 | 2021-05-20 | Middle-mounted motor transmission mechanism, electric moped driving system and electric moped |
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| CN (1) | CN214823908U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022241935A1 (en) * | 2021-05-20 | 2022-11-24 | 广东高标电子科技有限公司 | Mid-drive motor transmission mechanism, electric-assist bicycle driving system, and electric-assist bicycle |
-
2021
- 2021-05-20 CN CN202121088383.4U patent/CN214823908U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022241935A1 (en) * | 2021-05-20 | 2022-11-24 | 广东高标电子科技有限公司 | Mid-drive motor transmission mechanism, electric-assist bicycle driving system, and electric-assist bicycle |
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