CN111457064A - Two-gear planetary gear reducer for automobile - Google Patents

Two-gear planetary gear reducer for automobile Download PDF

Info

Publication number
CN111457064A
CN111457064A CN202010372919.9A CN202010372919A CN111457064A CN 111457064 A CN111457064 A CN 111457064A CN 202010372919 A CN202010372919 A CN 202010372919A CN 111457064 A CN111457064 A CN 111457064A
Authority
CN
China
Prior art keywords
gear
primary
synchronizer
sun gear
planet carrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010372919.9A
Other languages
Chinese (zh)
Inventor
刘树成
郝守刚
姚征
刘鹏翔
李进
姜泽军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Yikong Automotive Electronics Co ltd
Original Assignee
Changzhou Yikong Automotive Electronics Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changzhou Yikong Automotive Electronics Co ltd filed Critical Changzhou Yikong Automotive Electronics Co ltd
Priority to CN202010372919.9A priority Critical patent/CN111457064A/en
Publication of CN111457064A publication Critical patent/CN111457064A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/08—General details of gearing of gearings with members having orbital motion
    • F16H57/082—Planet carriers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • F16H2001/327—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear with orbital gear sets comprising an internally toothed ring gear

Abstract

The embodiment of the invention discloses a two-gear planetary gear reducer for an automobile. This reduction gear includes two-stage planetary gear reduction gears and synchronous ware, one-level planetary gear reduction gears includes the one-level sun gear, a plurality of one-level planetary gear, one-level planet carrier and one-level ring gear, second grade planetary gear reduction gears includes the second grade sun gear, a plurality of second grade planetary gear, second grade planet carrier and second grade ring gear, one-level planetary gear reduction gears passes through the connecting piece with second grade planetary gear reduction gears to be connected, one-level planetary gear reduction gears, second grade planetary gear reduction gears and synchronous ware are all installed in the casing. The synchronizer receives and executes the first control instruction, the secondary gear ring is connected with the inner wall of the shell, the synchronizer receives and executes the second control instruction, and the secondary gear ring is connected with the secondary planet carrier. By applying the scheme provided by the invention, different reduction ratios can be obtained when the torque and the rotating speed input by the motor are unchanged, and the driving requirements of different road conditions can be met.

Description

Two-gear planetary gear reducer for automobile
Technical Field
The invention relates to the technical field of speed reducers, in particular to a two-gear planetary gear speed reducer for an automobile.
Background
At present, the speed reducer used by the new energy vehicle is mainly a planetary gear speed reducer.
The planetary gear reducer in the prior art can only obtain a reduction ratio, so that when the planetary gear reducer is operated while the torque and the rotation speed input by the motor are not changed, only a fixed torque and a fixed rotation speed can be output, and the output fixed torque and fixed rotation speed are generally a high torque and a low rotation speed, or a low torque and a high rotation speed.
For different road conditions, the speed reducer is required to output high torque and low rotation speed as well as low torque and high rotation speed, so that the reduction ratio of the planetary gear speed reducer in the prior art is single, the high torque and the low rotation speed cannot be considered, and the low torque and the high rotation speed may still not meet the driving requirements of different road conditions under the condition that the motor runs at full power or the highest output rotation speed.
Disclosure of Invention
The invention provides a two-gear planetary gear reducer for an automobile, which can obtain different reduction ratios and meet driving requirements of different road conditions. The specific technical scheme is as follows:
in a first aspect, the invention provides a two-gear planetary gear reducer for an automobile, comprising a primary sun gear, a plurality of primary planet gears, a primary planet carrier, a primary gear ring, a connecting piece, a secondary sun gear, a plurality of secondary planet gears, a secondary planet carrier, a secondary gear ring, a synchronizer and a shell;
the primary sun gear, the primary planet carrier, the primary gear ring, the connecting piece, the secondary sun gear, the secondary planet carrier, the secondary gear ring and the synchronizer are coaxial, the axis of each primary planet gear is parallel to the axis of the primary sun gear, the axis of each secondary planet gear is parallel to the axis of the secondary sun gear, and the primary sun gear, the plurality of primary planet gears, the primary planet carrier, the primary gear ring, the connecting piece, the secondary sun gear, the plurality of secondary planet gears, the secondary planet carrier, the secondary gear ring and the synchronizer are all arranged in the shell;
the power input shaft is connected with the primary sun gear, the primary sun gear is externally meshed with the plurality of primary planetary gears, the plurality of primary planetary gears are in transmission connection with the primary planetary carrier, the primary planetary carrier is fixedly installed on the inner wall of the shell, and the plurality of primary planetary gears are internally meshed with the primary gear ring;
the primary gear ring is fixedly connected with the connecting piece, the connecting piece is fixedly connected with the secondary sun gear, the secondary sun gear is externally meshed with the plurality of secondary planet gears, the plurality of secondary planet gears are in transmission connection with the secondary planet carrier, the secondary planet carrier is connected with the power output shaft, and the plurality of secondary planet gears are internally meshed with the secondary gear ring;
when the synchronizer receives a first control instruction, the synchronizer executes the first control instruction, the secondary gear ring is connected with the inner wall of the shell, when the synchronizer receives a second control instruction, the synchronizer executes the second control instruction, the secondary gear ring is connected with the secondary planet carrier, wherein the first control instruction is sent when the automobile controller detects that the automobile meets a low-speed gear shifting condition, and the second control instruction is sent when the automobile controller detects that the automobile meets a high-speed gear shifting condition.
Optionally, the speed reducer further comprises a synchronous connecting disc;
the synchronous connecting disc is arranged in the shell, is coaxial with the primary sun gear and is fixedly connected with the secondary gear ring;
when the synchronizer receives a first control instruction, the synchronizer is connected with the synchronous connecting disc and pushes the synchronous connecting disc to be connected with the inner wall of the shell towards the preset direction, when the synchronizer receives a second control instruction, the synchronizer is connected with the synchronous connecting disc and pushes the synchronous connecting disc to be connected with the secondary planet carrier towards the direction opposite to the preset direction.
Optionally, when the synchronizer receives a first control instruction, the synchronizer is connected with the secondary gear ring and pushes the secondary gear ring to be connected with the inner wall of the shell in a preset direction; when the synchronizer receives a second control signal, the synchronizer is connected with the secondary gear ring and pushes the secondary gear ring to be connected with the secondary planet carrier in the direction opposite to the preset direction.
Optionally, the connecting piece comprises a connecting disc and a connecting shaft which are connected with each other, and the connecting disc, the connecting shaft and the primary sun gear are coaxial;
the connecting disc passes through the external splines with one-level ring gear fixed connection, the connecting axle pass through the external splines with second grade sun gear fixed connection.
Optionally, the first-stage planet carrier includes a plurality of first-stage installation shafts, an axis of each first-stage installation shaft is parallel to an axis of the first-stage sun gear, the plurality of first-stage planet gears are respectively installed on the plurality of first-stage installation shafts through needle roller bearings, and the number of the first-stage installation shafts is the same as that of the first-stage planet gears.
Optionally, the secondary planet carrier includes a plurality of secondary mounting shafts, an axis of each secondary mounting shaft is parallel to an axis of the secondary sun gear, the plurality of secondary planet gears are respectively mounted on the plurality of secondary mounting shafts through needle bearings, and the number of the secondary mounting shafts is the same as the number of the secondary planet gears.
Optionally, the number of the primary planet gears is three.
Optionally, the number of the secondary planet gears is three.
Optionally, the primary sun gear and the power input shaft are integrally formed.
Optionally, the secondary planet carrier and the power output shaft are integrally formed.
As can be seen from the above, an embodiment of the present invention provides a speed reducer including a two-stage planetary gear reduction mechanism and a synchronizer, where the one-stage planetary gear reduction mechanism includes a one-stage sun gear, a plurality of one-stage planetary gears, a one-stage planet carrier, and a one-stage gear ring, the two-stage planetary gear reduction mechanism includes a two-stage sun gear, a plurality of two-stage planetary gears, a two-stage planet carrier, and a two-stage gear ring, the one-stage planetary gear reduction mechanism is connected to the two-stage planetary gear reduction mechanism through a connecting member, and the one-stage planetary gear reduction mechanism, the two-stage planetary gear reduction mechanism. When the torque and the rotating speed input by the motor are unchanged, when the synchronizer receives a first control instruction, the synchronizer executes the first control instruction, the secondary gear ring is connected with the inner wall of the shell to obtain a high reduction ratio and output high torque and low rotating speed, when the synchronizer receives a second control instruction, the synchronizer executes a second control instruction, and the secondary gear ring is connected with the secondary planet carrier to obtain a low reduction ratio and output low torque and high rotating speed. Therefore, the speed reducer provided by the embodiment of the invention is not a single speed reduction ratio any more, can output high torque and low rotating speed as well as low torque and high rotating speed when the torque and the rotating speed input by the motor are not changed, and can meet the driving requirements of different road conditions. Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.
The innovation points of the embodiment of the invention comprise:
1. the embodiment of the invention provides a speed reducer comprising a two-stage planetary gear speed reducing mechanism and a synchronizer, wherein when the torque and the rotating speed input by a motor are unchanged, when the synchronizer receives a first control instruction, the synchronizer executes the first control instruction, a two-stage gear ring is connected with the inner wall of a shell to obtain a high speed reduction ratio and output high torque and low rotating speed, when the synchronizer receives a second control instruction, the synchronizer executes a second control instruction, and the two-stage gear ring is connected with a two-stage planet carrier to obtain a low speed reduction ratio and output low torque and high rotating speed. Therefore, the speed reducer provided by the embodiment of the invention is not a single speed reduction ratio any more, can output high torque and low rotating speed as well as low torque and high rotating speed when the torque and the rotating speed input by the motor are not changed, and can meet the driving requirements of different road conditions.
2. Different reduction ratios are obtained, the range of torque and rotating speed output by the speed reducer can be enlarged, and the climbing capacity of the automobile is improved. Moreover, because the range of the torque and the rotating speed output by the speed reducer is large, the range of the torque and the rotating speed which can be reached by the motor of the automobile can be relatively small, so that the requirement on the motor is lower, therefore, the automobile can use the motor with lower standard, and the purpose of saving energy is achieved.
3. Dial the inner wall connection that promotes synchronous connection pad and casing through the left side of synchronous ware for the inner wall connection of second grade ring gear and casing obtains first kind of reduction ratio, dials the synchronous connection pad that promotes through the right side of synchronous ware and is connected with the second grade planet carrier, makes the second grade ring gear be connected with the second grade planet carrier, obtains second kind of reduction ratio, no longer is single reduction ratio, can satisfy the driving demand of different road conditions.
4. Dial the inner wall connection that promotes second grade ring gear and casing through the left side of synchronous ware, obtain first kind of reduction ratio, dial the right side through synchronous ware and promote the second grade ring gear and be connected with the second grade planet carrier, obtain second kind of reduction ratio, no longer be single reduction ratio, can satisfy the driving demand of different road conditions.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of some embodiments of the invention. For a person skilled in the art, without inventive effort, further figures can be obtained from these figures.
Fig. 1 is a schematic structural diagram of a two-speed planetary gear reducer for an automobile according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a two-speed planetary gear reducer for an automobile according to an embodiment of the present invention, when a housing is not shown.
In fig. 1-2, 1 a first-stage sun gear, 2 a first-stage planetary gear, 3 a first-stage planet carrier, 4 a first-stage gear ring, 5 a connecting piece, 6 a second-stage sun gear, 7 a second-stage planetary gear, 8 a second-stage planet carrier, 9 a second-stage gear ring, 10 a synchronizer, 11 a shell and 12 a synchronous connecting disc.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
It is to be noted that the terms "comprises" and "comprising" and any variations thereof in the embodiments and drawings of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the invention discloses a two-gear planetary gear reducer for an automobile, which can obtain different reduction ratios and meet driving requirements of different road conditions. The following provides a detailed description of embodiments of the invention.
Fig. 1 is a schematic structural view of a two-speed planetary gear reducer for an automobile according to an embodiment of the present invention, and fig. 2 is a schematic structural view of the two-speed planetary gear reducer for an automobile according to the embodiment of the present invention, when a housing is not shown.
Referring to fig. 1 to 2, in order to obtain two reduction ratios, in an embodiment of the present invention, a reducer including a two-stage planetary gear reduction mechanism and a synchronizer 10 is provided, the one-stage planetary gear reduction mechanism includes a first-stage sun gear 1, a plurality of first-stage planetary gears 2, a first-stage planet carrier 3, and a first-stage ring gear 4, the two-stage planetary gear reduction mechanism includes a second-stage sun gear 6, a plurality of second-stage planetary gears 7, a second-stage planet carrier 8, and a second-stage ring gear 9, the one-stage planetary gear reduction mechanism is connected to the two-stage planetary gear reduction mechanism through a connecting member 5, and the one-stage planetary gear reduction mechanism, the two-stage planetary gear reduction.
Specifically, the two-gear planetary gear reducer for the automobile provided by the embodiment of the invention comprises a primary sun gear 1, a plurality of primary planet gears 2, a primary planet carrier 3, a primary gear ring 4, a connecting piece 5, a secondary sun gear 6, a plurality of secondary planet gears 7, a secondary planet carrier 8, a secondary gear ring 9, a synchronizer 10 and a shell 11.
One-level sun gear 1, one-level planet carrier 3, one-level ring gear 4, connecting piece 5, second grade sun gear 6, second grade planet carrier 8, second grade ring gear 9 and synchronizer 10 are coaxial, every one-level planetary gear 2's axis is parallel with one-level sun gear 1's axis, every second grade planetary gear 7's axis is parallel with second grade sun gear 6's axis, and one-level sun gear 1, a plurality of one-level planetary gear 2, one-level planet carrier 3, one-level ring gear 4, connecting piece 5, second grade sun gear 6, a plurality of second grade planetary gear 7, second grade planet carrier 8, second grade ring gear 9, synchronizer 10 all installs in casing 11.
The primary sun gear 1 is used as a power input end and is rigidly connected with a power input shaft, namely the power input shaft is connected with the primary sun gear 1. For example, the primary sun gear 1 may be formed integrally with the power input shaft.
One-level sun gear 1 and the 2 external toothing of a plurality of one-level planetary gear, a plurality of one-level planetary gear 2 transmission are connected in one-level planet carrier 3, exemplarily, one-level planet carrier 3 includes a plurality of one-level installation axles, and the axis of every one-level installation axle is parallel with the axis of one-level sun gear 1, and a plurality of one-level planetary gear 2 install respectively in a plurality of one-level installation axles through needle bearing, and wherein, the quantity of one-level installation axle is the same with the quantity of one-level planetary gear 2.
Illustratively, the number of the primary planetary gears 2 is three.
With continued reference to fig. 1-2, the primary planet carrier 3 is fixedly mounted to the inner wall of the housing 11, and the plurality of primary planet gears 2 are in internal engagement with the primary ring gear 4. The primary gear ring 4 is used as the power output end of the primary planetary gear speed reducing mechanism and is fixedly connected with the connecting piece 5. The secondary sun gear 6 is used as the power input end of the secondary planetary gear speed reducing mechanism and is fixedly connected with the connecting piece 5. By fixing the primary planet carrier 3 and outputting power through the primary ring gear 4, undersize of the primary planet gear 2 can be avoided.
The connecting piece 5 comprises a connecting disc and a connecting shaft which are connected with each other, and the connecting disc, the connecting shaft and the first-stage sun gear 1 are coaxial.
The connecting disc is fixedly connected with the primary gear ring 4 through an external spline, and the connecting shaft is fixedly connected with the secondary sun gear 6 through an external spline.
Therefore, the connecting piece 5 is fixedly connected with the primary gear ring 4 through the connecting disc and fixedly connected with the secondary sun gear 6 through the connecting shaft.
With continued reference to fig. 1-2, the secondary sun gear 6 is in external engagement with a plurality of secondary planet gears 7, the plurality of secondary planet gears 7 are drivingly connected to the secondary planet carrier 8, and illustratively, the secondary planet carrier 8 includes a plurality of secondary mounting shafts, each secondary mounting shaft having an axis parallel to an axis of the secondary sun gear 6, and the plurality of secondary planet gears 7 are respectively mounted to the plurality of secondary mounting shafts by needle bearings, wherein the number of secondary mounting shafts is the same as the number of secondary planet gears 7.
For example, the number of the secondary planet gears 7 may be three.
With continued reference to fig. 1-2, the secondary planet carrier 8 is rigidly connected to the power take-off shaft as a power take-off, i.e. the secondary planet carrier 8 is connected to the power take-off shaft and the plurality of secondary planet gears 7 are in internal engagement with the secondary ring gear 9. For example, the secondary planet carrier 8 may be formed integrally with the power take-off shaft.
Synchronizer 10 and vehicle controller communication connection, when vehicle controller detects that the car satisfies the low gear condition of shifting, vehicle controller sends first control command to synchronizer 10, and first control command is that vehicle controller detects that the car sends when satisfying the low gear condition of shifting promptly, wherein, vehicle controller detects that the car satisfies the low gear condition of shifting can satisfy the low gear condition of shifting for vehicle controller detects the car condition of car, wherein, the car condition includes the speed of car and/or the moment of torsion of car, for example: the speed of the vehicle is reduced to within a preset speed range.
When the synchronizer 10 receives the first control instruction, the synchronizer 10 executes the first control instruction, the secondary gear ring 9 is connected with the inner wall of the shell 11, and at this time, a first reduction ratio is obtained, wherein the first reduction ratio is the product of a first reduction ratio and a second reduction ratio, the first reduction ratio is the reduction ratio of the first-stage planetary gear reduction mechanism, and the second reduction ratio is the reduction ratio of the second-stage planetary gear reduction mechanism. In the embodiment of the invention, the first reduction ratio is a high reduction ratio, and the two-gear planetary gear reducer provided by the embodiment of the invention outputs high torque and low rotating speed when the torque and the rotating speed input by the motor are unchanged.
When the vehicle controller detects that the vehicle satisfies the high-speed gear shifting condition, a second control instruction is sent to the synchronizer 10, that is, the second control instruction is sent when the vehicle controller detects that the vehicle satisfies the high-speed gear shifting condition, wherein the vehicle controller detects that the vehicle satisfies the high-speed gear shifting condition, and the vehicle condition that the vehicle controller detects that the vehicle condition of the vehicle satisfies the high-speed gear shifting condition, wherein the vehicle condition includes a speed of the vehicle and/or a torque of the vehicle, for example: the speed of the vehicle is increased to within a preset speed range.
When the synchronizer 10 receives the second control command, the synchronizer 10 executes the second control command, and the secondary ring gear 9 is connected with the secondary planet carrier 8, so that a second reduction ratio is obtained, wherein the second reduction ratio is a one-step reduction ratio. In the embodiment of the invention, the second reduction ratio is a low reduction ratio, and when the torque and the rotating speed input by the motor are unchanged, the two-gear planetary gear reducer provided by the embodiment of the invention outputs low torque and high rotating speed.
The above-described two-speed planetary gear reducer for an automobile obtaining two reduction ratios may include two structures:
the first structure is as follows:
with continued reference to fig. 1-2, a two-speed planetary gear set for an automobile may also include a synchronizing land 12.
The synchronous connecting disc 12 is arranged in the shell 11, the synchronous connecting disc 12 is coaxial with the primary sun gear 1, and the synchronous connecting disc 12 is fixedly connected with the secondary gear ring 9. Illustratively, the synchronizing land 12 is splined to the secondary ring gear 9.
When the synchronizer does not receive the command, the synchronizer 10 is not in contact with the synchronizing connecting disc 12, when the synchronizer 10 receives the first control command, the synchronizer 10 is shifted to the left, the synchronizer 10 is connected with the synchronizing connecting disc 12, the synchronizing connecting disc 12 is pushed to be connected with the inner wall of the shell 11 towards the preset direction, and the synchronizing connecting disc 12 is fixedly connected with the secondary gear ring 9, so that the connection of the synchronizing connecting disc 12 and the inner wall of the shell 11 is equivalent to the connection of the secondary gear ring 9 and the inner wall of the shell 11. At this time, the secondary planetary gear 7 not only revolves around the axis of the secondary sun gear 6 but also rotates.
When the synchronizer 10 receives a second control instruction, the synchronizer 10 is shifted to the right, the synchronizer 10 is connected with the synchronous connecting disc 12, the synchronous connecting disc 12 is pushed to be connected with the secondary planet carrier 8 in the direction opposite to the preset direction, and the synchronous connecting disc 12 is fixedly connected with the secondary gear ring 9, so that the connection of the synchronous connecting disc 12 and the secondary planet carrier 8 is equivalent to the connection of the secondary gear ring 9 and the secondary planet carrier 8. At this time, the secondary planetary gear 7 revolves around the axis of the secondary sun gear 6, and the secondary sun gear 6, the secondary carrier 8, and the secondary ring gear 9 rotate at the same speed.
From this, dial the inner wall connection that promotes synchronous connection dish 12 and casing 11 through a left side of synchronous ware 10 for the inner wall connection of second grade ring gear 9 and casing 11 obtains first kind of reduction ratio, dials the synchronous connection dish 12 that promotes through the right side of synchronous ware 10 and is connected with second grade planet carrier 8, makes second grade ring gear 9 be connected with second grade planet carrier 8, obtains second kind of reduction ratio, no longer is single reduction ratio, can satisfy the driving demand of different road conditions.
The second structure is as follows:
when the synchronizer does not receive the command, the synchronizer 10 is not in contact with the secondary gear ring 9, when the synchronizer 10 receives the first control command, the synchronizer 10 is shifted to the left, the synchronizer 10 is connected with the secondary gear ring 9, the secondary gear ring 9 is pushed to be connected with the inner wall of the shell 11 in the preset direction, and at the moment, the secondary planetary gear 7 not only revolves around the axis of the secondary sun gear 6 but also rotates.
When the synchronizer 10 receives the second control signal, the synchronizer 10 is shifted to the right, the synchronizer 10 is connected with the secondary gear ring 9, and pushes the secondary gear ring 9 to be connected with the secondary planet carrier 8 in the direction opposite to the preset direction. At this time, the secondary planetary gear 7 revolves around the axis of the secondary sun gear 6, and the secondary sun gear 6, the secondary carrier 8, and the secondary ring gear 9 rotate at the same speed.
From this, dial the inner wall connection that promotes second grade ring gear 9 and casing 11 through a left side of synchronous ware 10, obtain first kind of reduction ratio, dial the right side through synchronous ware 10 and promote second grade ring gear 9 and be connected with second grade planet carrier 8, obtain second kind of reduction ratio, no longer be single reduction ratio, can satisfy the driving demand of different road conditions.
Compared with the first structure, the synchronizer 10 with the second structure directly pushes the second-stage gear ring 9 to be connected with the inner wall of the shell 11 or the second-stage planet carrier 8 instead of pushing the synchronous connecting disc 12 to be connected with the inner wall of the shell 11 or the second-stage planet carrier 8, so that the axial length of the second-stage gear ring 9 is larger than that of the second-stage gear ring 9 with the first structure, the manufacturability of the second-stage gear ring 9 with the second structure is poor, and the weight of the second structure is larger than the total weight of the first structure.
As can be seen from the above, the embodiment of the present invention provides a speed reducer including a two-stage planetary gear speed reducing mechanism and a synchronizer 10, wherein the one-stage planetary gear speed reducing mechanism includes a one-stage sun gear 1, a plurality of one-stage planetary gears 2, a one-stage planet carrier 3, and a one-stage gear ring 4, the two-stage planetary gear speed reducing mechanism includes a two-stage sun gear 6, a plurality of two-stage planetary gears 7, a two-stage planet carrier 8, and a two-stage gear ring 9, the one-stage planetary gear speed reducing mechanism is connected with the two-stage planetary gear speed reducing mechanism through a connecting member 5, and the one-stage planetary gear speed reducing mechanism, the two-stage planetary. When the torque and the rotating speed input by the motor are unchanged, when the synchronizer receives a first control instruction, the synchronizer executes the first control instruction, the secondary gear ring is connected with the inner wall of the shell to obtain a high reduction ratio and output high torque and low rotating speed, when the synchronizer receives a second control instruction, the synchronizer executes a second control instruction, and the secondary gear ring is connected with the secondary planet carrier to obtain a low reduction ratio and output low torque and high rotating speed. Therefore, the speed reducer provided by the embodiment of the invention is not a single speed reduction ratio any more, can output high torque and low rotating speed as well as low torque and high rotating speed when the torque and the rotating speed input by the motor are not changed, and can meet the driving requirements of different road conditions.
Meanwhile, different reduction ratios are obtained, the range of torque and rotating speed output by the speed reducer can be enlarged, and the climbing capacity of the automobile is improved. Moreover, because the range of the torque and the rotating speed output by the speed reducer is large, the range of the torque and the rotating speed which can be reached by the motor of the automobile can be relatively small, so that the requirement on the motor is lower, therefore, the automobile can use the motor with lower standard, and the purpose of saving energy is achieved.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A two-gear planetary gear reducer for an automobile is characterized by comprising a primary sun gear, a plurality of primary planetary gears, a primary planet carrier, a primary gear ring, a connecting piece, a secondary sun gear, a plurality of secondary planetary gears, a secondary planet carrier, a secondary gear ring, a synchronizer and a shell;
the primary sun gear, the primary planet carrier, the primary gear ring, the connecting piece, the secondary sun gear, the secondary planet carrier, the secondary gear ring and the synchronizer are coaxial, the axis of each primary planet gear is parallel to the axis of the primary sun gear, the axis of each secondary planet gear is parallel to the axis of the secondary sun gear, and the primary sun gear, the plurality of primary planet gears, the primary planet carrier, the primary gear ring, the connecting piece, the secondary sun gear, the plurality of secondary planet gears, the secondary planet carrier, the secondary gear ring and the synchronizer are all arranged in the shell;
the power input shaft is connected with the primary sun gear, the primary sun gear is externally meshed with the plurality of primary planetary gears, the plurality of primary planetary gears are in transmission connection with the primary planetary carrier, the primary planetary carrier is fixedly installed on the inner wall of the shell, and the plurality of primary planetary gears are internally meshed with the primary gear ring;
the primary gear ring is fixedly connected with the connecting piece, the connecting piece is fixedly connected with the secondary sun gear, the secondary sun gear is externally meshed with the plurality of secondary planet gears, the plurality of secondary planet gears are in transmission connection with the secondary planet carrier, the secondary planet carrier is connected with the power output shaft, and the plurality of secondary planet gears are internally meshed with the secondary gear ring;
when the synchronizer receives a first control instruction, the synchronizer executes the first control instruction, the secondary gear ring is connected with the inner wall of the shell, when the synchronizer receives a second control instruction, the synchronizer executes the second control instruction, the secondary gear ring is connected with the secondary planet carrier, wherein the first control instruction is sent when the automobile controller detects that the automobile meets a low-speed gear shifting condition, and the second control instruction is sent when the automobile controller detects that the automobile meets a high-speed gear shifting condition.
2. The reducer of claim 1, further comprising a synchronizing land;
the synchronous connecting disc is arranged in the shell, is coaxial with the primary sun gear and is fixedly connected with the secondary gear ring;
when the synchronizer receives a first control instruction, the synchronizer is connected with the synchronous connecting disc and pushes the synchronous connecting disc to be connected with the inner wall of the shell towards the preset direction, when the synchronizer receives a second control instruction, the synchronizer is connected with the synchronous connecting disc and pushes the synchronous connecting disc to be connected with the secondary planet carrier towards the direction opposite to the preset direction.
3. The decelerator according to claim 1, wherein the synchronizer is connected to the secondary ring gear to urge the secondary ring gear into connection with the inner wall of the casing in a predetermined direction when the synchronizer receives a first control command; when the synchronizer receives a second control signal, the synchronizer is connected with the secondary gear ring and pushes the secondary gear ring to be connected with the secondary planet carrier in the direction opposite to the preset direction.
4. The reducer of claim 1, wherein the connecting member includes a connecting disc and a connecting shaft connected to each other, the connecting disc, the connecting shaft and the primary sun gear being coaxial;
the connecting disc passes through the external splines with one-level ring gear fixed connection, the connecting axle pass through the external splines with second grade sun gear fixed connection.
5. The speed reducer of claim 1, wherein the primary planet carrier includes a plurality of primary mounting shafts, each primary mounting shaft having an axis parallel to an axis of the primary sun gear, the plurality of primary planet gears being mounted to the plurality of primary mounting shafts by needle bearings, respectively, wherein the number of primary mounting shafts is the same as the number of primary planet gears.
6. The speed reducer of claim 1, wherein the secondary planet carrier comprises a plurality of secondary mounting shafts, each secondary mounting shaft having an axis parallel to an axis of the secondary sun gear, the plurality of secondary planet gears being mounted to the plurality of secondary mounting shafts by needle bearings, respectively, wherein the number of secondary mounting shafts is the same as the number of secondary planet gears.
7. The speed reducer of claim 1, wherein the number of the primary planet gears is three.
8. The reducer of claim 1, wherein the number of secondary planet gears is three.
9. The speed reducer of claim 1, wherein the primary sun gear is integrally formed with the power input shaft.
10. The speed reducer of claim 1, wherein the secondary planet carrier is integrally formed with the power take-off shaft.
CN202010372919.9A 2020-05-06 2020-05-06 Two-gear planetary gear reducer for automobile Pending CN111457064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010372919.9A CN111457064A (en) 2020-05-06 2020-05-06 Two-gear planetary gear reducer for automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010372919.9A CN111457064A (en) 2020-05-06 2020-05-06 Two-gear planetary gear reducer for automobile

Publications (1)

Publication Number Publication Date
CN111457064A true CN111457064A (en) 2020-07-28

Family

ID=71683853

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010372919.9A Pending CN111457064A (en) 2020-05-06 2020-05-06 Two-gear planetary gear reducer for automobile

Country Status (1)

Country Link
CN (1) CN111457064A (en)

Similar Documents

Publication Publication Date Title
EP3812617B1 (en) Transmission, power drive system, and vehicle
CN201071904Y (en) Differential epicyclic gear box
CN204114020U (en) A kind of reduction gearing mechanism of chipper
CN101598194A (en) A kind of double powered variable transmission for electric automobile
CN202451713U (en) Automobile seat angle adjusting reduction gearbox
CN212604505U (en) Coaxial two-gear planetary row electric drive axle for automobile
CN2931935Y (en) Speed reducing device for laundry machine
CN212604503U (en) Coaxial two-gear planetary row electric drive axle for automobile
CN212604504U (en) Coaxial two-gear planetary row electric drive axle for automobile
CN212616131U (en) Two-gear planetary gear reducer for automobile
CN212604502U (en) Coaxial two-gear planetary row electric drive axle for automobile
CN111457064A (en) Two-gear planetary gear reducer for automobile
CN111439117A (en) Coaxial two-gear planetary row electric drive axle for automobile
CN216923142U (en) Transmission and electric drive system and vehicle
CN213655620U (en) Novel two-gear gearbox assembly for new energy vehicle
CN115366644A (en) Double-motor two-gear unpowered interruption electric drive axle
CN213017525U (en) Two-gear planetary gear reducer applicable to tandem type hybrid power-driven mine car with power takeoff
CN204921866U (en) Be applied to electric vehicle's third gear derailleur
CN210859704U (en) Reduction gear assembly and passenger car for wheel hub motor
CN210234671U (en) Electric rear axle speed changing system of light truck
CN111734791A (en) Two-gear planetary gear reducer applicable to tandem type hybrid power-driven mine car with power takeoff
CN202629041U (en) Planet carrier of speed changer
CN111439118A (en) Coaxial two-gear planetary row electric drive axle for automobile
CN111439116A (en) Coaxial two-gear planetary row electric drive axle for automobile
CN113124111A (en) Reduction gearbox for vehicle

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination