CN210859704U - Reduction gear assembly and passenger car for wheel hub motor - Google Patents
Reduction gear assembly and passenger car for wheel hub motor Download PDFInfo
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- CN210859704U CN210859704U CN201921190478.XU CN201921190478U CN210859704U CN 210859704 U CN210859704 U CN 210859704U CN 201921190478 U CN201921190478 U CN 201921190478U CN 210859704 U CN210859704 U CN 210859704U
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Abstract
The utility model relates to an automobile parts technical field discloses a reduction gear assembly and passenger car for hub motor. The hub motor speed reducer assembly comprises an input shaft and an output shaft which are arranged in parallel at intervals; the device also comprises a primary speed reducing mechanism and a secondary speed reducing mechanism; the first-stage speed reducing mechanism comprises a straight gear and a sun gear rotationally arranged on the output shaft, the sun gear is a duplicate gear and comprises a first gear and a second gear, the first gear is meshed with the straight gear, and the second gear is arranged on one side of the first gear, which is far away from the hub bearing; the secondary speed reducing mechanism comprises a planetary gear and a gear ring which are rotatably arranged on a planetary gear shaft, the planetary gear is simultaneously meshed with the second gear and the gear ring, and the planetary gear shaft is connected with the output shaft. The passenger car comprises the speed reducer assembly for the hub motor. By adopting the two-stage speed reducing mechanism, the speed ratio variation range is larger, and the input shaft and the output shaft are arranged in parallel at intervals, so that the axial size is smaller, and the structure is simpler.
Description
Technical Field
The utility model relates to an automobile parts technical field especially relates to a reduction gear assembly and passenger car for hub motor.
Background
The wheel hub motor, also called built-in wheel motor, is installed inside the wheel rim and outside the wheel hub, and its most important feature is that the power, transmission and braking devices are integrated into the wheel hub, so that the mechanical part of the vehicle is greatly simplified. In the transmission, a speed reducer is one of the most important components.
Because the hub motor assembly integrates the power system in a limited hub space, the high integration with the hub motor can be better realized by the smaller size of the speed reducer. However, the conventional speed reducer usually occupies a larger axial space, so that the available space of other parts is reduced, and the performance of the whole hub motor is weakened; meanwhile, the problems of small speed ratio change, complex structure and the like exist.
SUMMERY OF THE UTILITY MODEL
Based on above, an object of the utility model is to provide a reduction gear assembly and passenger car for wheel hub motor, the velocity ratio changes bigger, and axial dimension is littleer, and the structure is simpler.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a reduction gear assembly for wheel hub motor, includes input shaft and the output shaft of being connected with the inner circle of wheel hub bearing, still includes:
the shell is connected with the outer ring of the hub bearing, and the input shaft and the output shaft are arranged in parallel at intervals;
the first-stage speed reducing mechanism is arranged in the shell and comprises a straight gear arranged on the input shaft and a sun gear rotationally arranged on the output shaft, the sun gear is a duplicate gear and comprises a first gear and a second gear, the first gear is meshed with the straight gear, and the second gear is arranged on one side of the first gear, which is far away from the hub bearing;
and the secondary speed reducing mechanism is arranged in the shell and comprises a planetary gear rotatably arranged on a planetary gear shaft and a gear ring arranged on the shell, the planetary gear is simultaneously meshed with the second gear and the gear ring, and the planetary gear shaft is connected with the output shaft.
As a preferable aspect of the reducer assembly for a hub motor, one end of the input shaft extends out of the housing from one side of the housing, and one end of the output shaft extends out of the housing from the other side of the housing.
As a preferred scheme of the reducer assembly for the hub motor, the shell comprises a front shell and a rear shell which are mutually buckled and connected, the input end of the input shaft extends out of the front shell, the output end of the output shaft extends out of the rear shell, and the rear shell is connected with an outer ring of the hub bearing.
As a preferable scheme of the reducer assembly for the hub motor, the planet gear shaft is connected with the output shaft through a rolling pin.
In a preferred embodiment of the reducer assembly for a hub motor, the plurality of planetary gears are provided, and the plurality of planetary gears are provided at equal intervals in the circumferential direction of the sun gear.
As a preferred scheme of the reducer assembly for the hub motor, an oil guide disc is arranged at one end, far away from the hub bearing, of the output shaft, an oil channel communicated with the oil guide disc is arranged in the shell, and lubricating oil can enter the shell from the oil channel.
In a preferred embodiment of the reducer assembly for a hub motor, the output shaft is rotatably connected to the housing through a first bearing, and the oil guide disc is in communication with the first bearing.
As a preferred scheme of the reducer assembly for the hub motor, the sun gear is rotatably connected with the output shaft through a second bearing, the output shaft is provided with a first oil guide channel and a first oil guide hole which are communicated with each other, one end, far away from the first oil guide hole, of the first oil guide channel is communicated with the oil guide disc, and one end, far away from the first oil guide channel, of the first oil guide hole is communicated with the second bearing.
As a preferred scheme of the reducer assembly for the hub motor, the planetary gear is rotationally connected with the planetary gear shaft through a third bearing, the planetary gear shaft is provided with a second oil guide channel and a second oil guide hole which are communicated with each other, one end, away from the second oil guide hole, of the second oil guide channel is communicated with the first oil guide channel, and one end, away from the second oil guide channel, of the second oil guide hole is communicated with the third bearing.
The passenger car comprises a hub motor and a speed reducer assembly for the hub motor, wherein the speed reducer assembly comprises the hub motor, and an input shaft is connected with a motor shaft of the hub motor.
The utility model has the advantages that: the speed reduction function of the speed reducer assembly for the hub motor is realized by arranging the primary speed reduction mechanism and the secondary speed reduction mechanism; the speed ratio variation range of the speed reducer assembly for the hub motor is larger by setting the primary speed reducing mechanism as a straight gear speed reducing mechanism and setting the secondary speed reducing mechanism as a planetary gear speed reducing mechanism; the axial size of the reducer assembly for the hub motor is further simplified by arranging the input shaft and the output shaft in parallel at intervals instead of coaxially; through setting up the sun gear into the duplicate wheel, link one-level reduction gears and second reduction gears, realize power transmission, specifically, the second gear setting of duplicate wheel is in the one side that wheel hub bearing was kept away from to first gear, and second reduction gears is located one side that wheel hub bearing was kept away from to one-level reduction gears promptly, and the axial dimension that sets up like this and enables wheel hub motor reducer assembly is littleer, make full use of space, and the structure is simpler.
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 view of a reducer assembly for a hub motor according to an embodiment of the present invention;
fig. 2 is a lubricating oil flow diagram of a reducer assembly for a wheel hub motor according to an embodiment of the present invention.
In the figure:
1-an input shaft;
2-a hub bearing;
3-an output shaft; 31-a first oil guide channel; 32-a first oil guide hole;
4-a shell; 41-front case; 42-a rear housing;
51-a spur gear;
6-sun gear; 61-a first gear; 62-a second gear;
71-planet gear shafts; 711-second oil conducting channel; 712-a second oil guide hole; 72-a planetary gear; 73-a gear ring; 74-roll pin; 75-antifriction shims;
8-an oil guiding disc;
91-a first bearing; 92-a second bearing; 93-a third bearing; 94-thrust bearing.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 2, the present embodiment provides a reducer assembly for a hub motor, which is used for a passenger vehicle. The reducer assembly for the hub motor comprises an input shaft 1 and an output shaft 3 connected with an inner ring of a hub bearing 2, wherein the input shaft 1 and the output shaft 3 are arranged in parallel at intervals, so that the reducer assembly for the hub motor has a smaller size in the axial direction, and high integration with the hub motor is realized; this reduction gear assembly for wheel hub motor still includes the casing 4 of being connected with the outer lane of wheel hub bearing 2 and sets up one-level reduction gears and the second grade reduction gears in casing 4, and casing 4 is provided with and does benefit to dustproof and pleasing to the eye, and one-level reduction gears and second grade reduction gears realize the speed reduction function of reduction gear assembly for wheel hub motor.
Specifically, the primary speed reducing mechanism comprises a straight gear 51 arranged on the input shaft 1 and a sun gear 6 rotationally arranged on the output shaft 3, the sun gear 6 is a duplicate gear, the position limitation is realized on the output shaft 3 through a thrust bearing 94, the primary speed reducing mechanism comprises a first gear 61 and a second gear 62, the first gear 61 is meshed with the straight gear 51, and the second gear 62 is arranged on one side of the first gear 61, which is far away from the hub bearing 2; the two-stage speed reduction mechanism comprises a planetary gear 72 rotatably arranged on a planetary gear shaft 71 and a gear ring 73 arranged on the shell 4, wherein the planetary gear 72 is simultaneously meshed with the second gear 62 and the gear ring 73, and the planetary gear shaft 71 is connected with the output shaft 3; the output shaft 3 is connected with the inner ring of the hub bearing 2.
The one-level reduction gears set up to spur gear 51 and reduce speed, the second grade reduction gears set up to planetary gear 72 and reduce speed, make the speed ratio variation range of reduction gear assembly for the wheel hub motor bigger, set up the second gear 62 of sun gear 6 in one side that wheel hub bearing 2 was kept away from to first gear 61, the second grade reduction gears is located one side that wheel hub bearing 2 was kept away from to the one-level reduction gears promptly, it is littleer to set up the axial dimensions who enables the reduction gear assembly for the wheel hub motor like this, the structure is simpler, and the cost is lower.
If the input shaft 1 and the output shaft 3 are arranged to extend out of the shell 4 from the same side of the shell 4, the length of the output shaft 3 must be increased in order to avoid interference between the hub motor and the hub, so that the processing difficulty of the output shaft 3 is increased, and the performance of the reducer assembly for the hub motor is also affected. Therefore, in the present embodiment, one end of the input shaft 1 extends out of the housing 4 from one side of the housing 4, and one end of the output shaft 3 extends out of the housing 4 from the other side of the housing 4. Set up like this, enable in-wheel motor and wheel hub and be located the both sides of reduction gear assembly for in-wheel motor respectively, be favorable to reducing the axial dimension of reduction gear assembly for in-wheel motor, can reduce output shaft 3's the processing degree of difficulty simultaneously, guarantee the performance of reduction gear assembly for in-wheel motor.
Preferably, the casing 4 includes a front casing 41 and a rear casing 42 that are fastened and connected with each other, the front casing 41 and the rear casing 42 are detachably connected by bolts, and the rear casing 42 is detachably connected with the outer ring of the hub bearing 2 by bolts, so that an operator can conveniently overhaul and replace parts in the casing 4. The input end of the input shaft 1 extends out of the front housing 41, and the output end of the output shaft 3 extends out of the rear housing 42.
Further, the planetary gear shaft 71 is connected to the output shaft 3 through a winding pin 74 for transmitting power to the output shaft 3 through the planetary gear shaft 71. Power is input from the input shaft 1, and since the spur gear 51 is mounted on the input shaft 2 and the spur gear 51 and the first gear 61 are engaged with each other, the power is transmitted to the sun gear 6 through the input shaft 1, the spur gear 51 and the first gear 61 in sequence; since the sun gear 6 is a duplicate gear, the power can be transmitted to the second gear 62 through the first gear 61; since the second gear 62 is again meshed with the planetary gears 72 on the planetary gear shafts 71, power is again transmitted from the second gear 62 to the planetary gear shafts 71 through the planetary gears 72; since the planetary gear shaft 71 is connected to the output shaft 3 through the winding pin 74, the final power is transmitted to the output shaft 3.
The planetary gears 72 are arranged in a plurality of numbers, and the plurality of planetary gears 72 are arranged at equal intervals along the circumferential direction of the sun gear 6, so that the performance of the speed reducer assembly for the hub motor is better, and the power transmission is more stable. The planet gears 72 are fitted with friction reducing washers 75 on both sides to prevent wear of the planet gears 72 during rotation.
The output shaft 3 is rotatably connected in the shell 4 through a first bearing 91; the sun gear 6 is rotationally connected with the output shaft 3 through a second bearing 92, and the second bearing 92 is a rolling bearing, so that the resistance is small and the starting is fast; the planet gear 72 is rotatably connected with the planet gear shaft 71 through a third bearing 93, the third bearing 93 is a needle bearing, the radial structure is compact, the inner diameter size and the load capacity are the same as those of other types of bearings, the outer diameter is the smallest, the bearing is particularly suitable for bearing occasions with limited radial installation size, the size of the reducer assembly for the hub motor is effectively reduced, the transmission is more stable, and the bearing capacity is larger.
In order to lubricate the shafts, the gears and the bearings, the reducer assembly for the hub motor is further provided with a lubricating system. Wherein the housing 4 is provided with an oil channel from which lubricating oil can enter the housing 4 for lubricating the shafts and gears mounted in the housing 4.
As shown in fig. 2, specifically, one end of the output shaft 3 away from the hub bearing 2 is provided with an oil guide disc 8 communicated with the oil passage, and the oil guide disc 8 is communicated with the first bearing 91; the lubricating oil enters the first bearing 91 through the oil passage and the oil guide plate 8, and lubricates the first bearing 91. The output shaft 3 is provided with a first oil guide passage 31 and a first oil guide hole 32 which are communicated with each other, one end of the first oil guide passage 31 far away from the first oil guide hole 32 is communicated with the oil guide disc 8, and one end of the first oil guide hole 32 far away from the first oil guide passage 31 is communicated with the second bearing 92; the lubricating oil lubricates the second bearing 92 via the oil passage, the oil guide pan 8, the first oil guide passage 31, and the first oil guide hole 32. The pinion shaft 71 is provided with a second oil guide passage 711 and a second oil guide hole 712 which are communicated with each other, one end of the second oil guide passage 711 remote from the second oil guide hole 712 is communicated with the first oil guide passage 31, and one end of the second oil guide hole 712 remote from the second oil guide passage 711 is communicated with the third bearing 93; the third bearing 93 is lubricated by lubricating oil via the oil passage, the oil guide pan 8, the first oil guide passage 31, the second oil guide passage 711, and the second oil guide hole 712.
The embodiment provides a passenger car, including the in-wheel motor, still include foretell reduction gear assembly for in-wheel motor, the input shaft 1 of reduction gear assembly for in-wheel motor is connected with the motor shaft of in-wheel motor, and the output shaft is connected with the inner circle of wheel hub bearing 2, and power is transmitted to input shaft 1 from the in-wheel motor, and the speed reduction that passes through one-level reduction gear and second reduction gear in proper order is finally transmitted power to the inner circle of wheel hub bearing 2 through output shaft 3. The speed reducer assembly for the hub motor of the passenger car has the advantages of larger speed ratio change range, smaller axial size and simple structure.
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 changes, 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. The utility model provides a reduction gear assembly for wheel hub motor, includes input shaft (1) and output shaft (3) of being connected with the inner circle of wheel hub bearing (2), its characterized in that still includes:
the shell (4) is connected with the outer ring of the hub bearing (2), and the input shaft (1) and the output shaft (3) are arranged in parallel at intervals;
the primary speed reducing mechanism is arranged in the shell (4), and comprises a straight gear (51) arranged on the input shaft (1) and a sun gear (6) rotationally arranged on the output shaft (3), the sun gear (6) is a duplicate gear and comprises a first gear (61) and a second gear (62), the first gear (61) is meshed with the straight gear (51), and the second gear (62) is arranged on one side, away from the hub bearing (2), of the first gear (61);
the two-stage speed reducing mechanism is arranged in the shell (4) and comprises a planetary gear (72) rotatably arranged on a planetary gear shaft (71) and a gear ring (73) arranged on the shell (4), the planetary gear (72) is meshed with the second gear (62) and the gear ring (73) at the same time, and the planetary gear shaft (71) is connected with the output shaft (3).
2. A reducer assembly for a hub motor according to claim 1, wherein one end of the input shaft (1) extends out of the housing (4) from one side of the housing (4), and one end of the output shaft (3) extends out of the housing (4) from the other side of the housing (4).
3. A reducer assembly for a hub motor according to claim 2, wherein the housing (4) comprises a front housing (41) and a rear housing (42) which are snap-coupled to each other, the input end of the input shaft (1) extends out of the front housing (41), the output end of the output shaft (3) extends out of the rear housing (42), and the rear housing (42) is coupled to the outer ring of the hub bearing (2).
4. A reducer assembly for a hub motor according to claim 1, wherein the planet shafts (71) are connected to the output shaft (3) by winding pins.
5. A reducer assembly for a hub motor according to claim 1, wherein the planetary gear (72) is provided in plurality, and the plurality of planetary gears (72) are provided at equal intervals in the circumferential direction of the sun gear (6).
6. A reducer assembly for a wheel hub motor according to claim 1, characterized in that the end of the output shaft (3) remote from the wheel hub bearing (2) is provided with an oil guiding disc (8), and in that in the housing (4) is provided an oil channel communicating with the oil guiding disc (8), from which oil channel lubricating oil can enter the housing (4).
7. A reducer assembly for a hub motor according to claim 6, wherein the output shaft (3) is rotatably connected to the housing (4) by a first bearing (91), and the oil pan (8) is in communication with the first bearing (91).
8. A reducer assembly according to claim 6, wherein the sun gear (6) is rotatably connected to the output shaft (3) via a second bearing (92), the output shaft (3) is provided with a first oil guide passage (31) and a first oil guide hole (32) which are communicated with each other, one end of the first oil guide passage (31) away from the first oil guide hole (32) is communicated with the oil guide plate (8), and one end of the first oil guide hole (32) away from the first oil guide passage (31) is communicated with the second bearing (92).
9. A reducer assembly for a hub motor according to claim 8, wherein the planetary gear (72) is rotatably connected to the planetary gear shaft (71) via a third bearing (93), the planetary gear shaft (71) is provided with a second oil guide passage (711) and a second oil guide hole (712) communicating with each other, an end of the second oil guide passage (711) remote from the second oil guide hole (712) communicates with the first oil guide passage (31), and an end of the second oil guide hole (712) remote from the second oil guide passage (711) communicates with the third bearing (93).
10. Passenger car comprising an in-wheel motor, characterized in that it further comprises a reducer assembly for an in-wheel motor according to any of claims 1-9, the input shaft (1) being connected to the motor shaft of the in-wheel motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921190478.XU CN210859704U (en) | 2019-07-26 | 2019-07-26 | Reduction gear assembly and passenger car for wheel hub motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921190478.XU CN210859704U (en) | 2019-07-26 | 2019-07-26 | Reduction gear assembly and passenger car for wheel hub motor |
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| Publication Number | Publication Date |
|---|---|
| CN210859704U true CN210859704U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921190478.XU Active CN210859704U (en) | 2019-07-26 | 2019-07-26 | Reduction gear assembly and passenger car for wheel hub motor |
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| CN (1) | CN210859704U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117432767A (en) * | 2023-12-21 | 2024-01-23 | 中国第一汽车股份有限公司 | Speed reducer and vehicle |
-
2019
- 2019-07-26 CN CN201921190478.XU patent/CN210859704U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117432767A (en) * | 2023-12-21 | 2024-01-23 | 中国第一汽车股份有限公司 | Speed reducer and vehicle |
| CN117432767B (en) * | 2023-12-21 | 2024-03-29 | 中国第一汽车股份有限公司 | Speed reducer and vehicle |
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