CN113669431A - Arrangement structure of transmission system of speed reducer for pure electric vehicle - Google Patents
Arrangement structure of transmission system of speed reducer for pure electric vehicle Download PDFInfo
- Publication number
- CN113669431A CN113669431A CN202110749641.7A CN202110749641A CN113669431A CN 113669431 A CN113669431 A CN 113669431A CN 202110749641 A CN202110749641 A CN 202110749641A CN 113669431 A CN113669431 A CN 113669431A
- Authority
- CN
- China
- Prior art keywords
- gear
- input
- gears
- pure electric
- electric vehicle
- 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
Links
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 40
- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000009966 trimming Methods 0.000 claims description 32
- 230000004048 modification Effects 0.000 claims description 19
- 238000012986 modification Methods 0.000 claims description 19
- 230000009467 reduction Effects 0.000 claims description 2
- 244000309464 bull Species 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 27
- 238000007493 shaping process Methods 0.000 description 10
- 238000004026 adhesive bonding Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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
- 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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
-
- 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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
- F16H55/088—Profiling with corrections on tip or foot of the teeth, e.g. addendum relief for better approach contact
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a speed reducer transmission system arrangement structure for a pure electric vehicle. The input shaft is provided with 2 input gears, each input gear is a helical gear with the same type, and the rotation directions of the 2 input gears are opposite; the middle shaft is provided with middle shaft large gears which are meshed with the input gears one by one, and the models of the middle shaft large gears are the same; the intermediate shaft is provided with an intermediate shaft pinion; the output shaft is provided with a differential gear bull gear meshed with the intermediate shaft pinion. The input stage gear pair of the speed reducer of the pure electric vehicle is increased to 2 pairs, so that the problems of bearing load increase and shafting movement caused by unbalanced axial force on a shafting are solved, and the input shaft bearing model selection is facilitated; the problems of use and process caused by larger tooth width of the input stage gear pair are solved.
Description
Technical Field
The invention relates to a transmission system arrangement structure, in particular to a speed reducer transmission system arrangement structure for a pure electric vehicle.
Background
With the further improvement of the requirements of people on environmental protection, electric automobiles are becoming popular in the automobile industry. The speed reducer of the pure electric vehicle is not provided with an idler gear, so that noise generated by the arrangement of the idler gear is eliminated. The design of the common bevel gear of the speed reducer improves the meshing contact ratio and the NVH performance. In the prior art, the input stage of the speed reducer of the pure electric vehicle is a single gear pair (the single gear pair refers to two meshed gears), and in order to further improve the NVH performance, under the condition of ensuring that the end face contact ratio is not changed, the input stage gear pair adopts a design method with a large tooth width and a large spiral angle, so that the axial contact ratio of the input stage gear pair is improved, and further the total contact ratio of the input stage gear pair is improved.
Such a reducer structure has certain problems: 1. because the input stage gear pair adopts a large helical angle design, a large axial force can be generated, so that the bearing load is increased, the service life of the bearing is shortened, the shafting is easy to axially float due to the large axial force, and the reliability of the reducer system is reduced; 2. the input stage gear pair is a single pair gear pair, the tooth width of the input stage gear pair is large, and poor heat dissipation is easy to generate gluing failure when the gear pair with large tooth width and large helical angle is meshed; 3. the input stage gear pair is a single pair of gear pairs, and the range of the torque borne by the input stage gear pair is wide, so that the shaping difficulty of the gear pair is increased, the whole torque range is difficult to cover, and the shaping effect of the gear pair is difficult to ensure; 4. the difficulty of gear grinding is high when the large-tooth-width large-spiral angle gear is manufactured, the processing error of the tooth surface contour is large, and the consistency of the gear obtained by gear grinding is poor.
Disclosure of Invention
The invention aims to provide a speed reducer transmission system arrangement structure for a pure electric vehicle, which increases the input stage gear pair of the speed reducer of the pure electric vehicle into 2 pairs so as to solve the problems of the speed reducer structure.
The technical scheme of the invention is as follows:
a reduction gear transmission system arrangement structure for pure electric vehicles includes:
the input shaft is provided with 2 input gears, each input gear is a helical gear with the same type, and the rotation directions of the 2 input gears are opposite;
the middle shaft is provided with middle shaft large gears which are meshed with the input gears one by one, and the models of the middle shaft large gears are the same; the intermediate shaft is provided with an intermediate shaft pinion;
and the output shaft is provided with a differential gear bull gear meshed with the intermediate shaft pinion.
According to the arrangement structure of the transmission system of the speed reducer for the pure electric vehicle, 2 input gears are arranged on an input shaft, the rotation directions of the 2 input gears are opposite, intermediate shaft large gears meshed with the input gears one by one are arranged on the intermediate shaft, and each input gear and the intermediate shaft large gears meshed with the input gear form a pair of input stage gear pairs.
According to the reducer transmission system arrangement structure for the pure electric vehicle, the rotating directions of the 2 input gears are opposite, the types are the same, the axial force generated by the input stage gear pair formed in the mode is offset, the problems of bearing load increase and shafting movement caused by unbalanced axial force on a shafting are solved, and input shaft bearing model selection is facilitated. The input stage gear pair is changed from a single pair to 2 pairs, and when the bearing is unchanged, the load of the single input stage gear pair is shared by the 2 pairs of input stage gear pairs, so that the tooth width of the input stage gear pair can be reduced, the heat dissipation effect of the input stage gear pair is improved, and the probability of gluing failure of the input stage gear pair is reduced; because the torque range borne by each pair of input stage gear pairs is reduced, the shaping difficulty of the gear pairs is reduced, and the shaping effect of the gear pairs is favorably ensured; the tooth width of the input stage gear pair is reduced, the tooth grinding difficulty is reduced, the quality of the tooth surface profile is improved, and the consistency of the gear after tooth grinding is improved.
Preferably, the input gear and the intermediate shaft gearwheel are both modified gears. In order to improve the NVH effect, all the input gears and the intermediate shaft large gear need to be subjected to shape modification treatment so as to ensure the meshing effect of each pair of gear pairs and reduce vibration and noise. It will be appreciated that since the input stage gear pair changes from a single pair to 2 pairs, the problems in operation are different from the previous ones, such as: the knocking energy of the reducer is increased under the Tip in/out working condition (accelerator is stepped on suddenly/accelerator is stepped on slowly), and the NVH effect is poor; the knocking energy of the reducer is increased under the energy recovery working condition, and the NVH effect is poor; when the input stage gear pair is in different phases, the speed reducer is knocked for many times, and the NVH effect is poor. Therefore, the process for input stage gear pair shape modification of the speed reducer transmission system arrangement structure for the pure electric vehicle is correspondingly adjusted.
Preferably, the input gear and the intermediate shaft gearwheel are subjected to a shape modification process, which comprises the following steps: addendum trimming, drum trimming, helix angle trimming, and end trimming. After the addendum trimming, the impact of the gear in meshing is reduced, and the Tip in working condition order noise is reduced; the tooth surface of the gear subjected to crowning trimming is crowned with a convex middle part along the width direction, so that the contact condition of the gear is favorably improved, the impact during meshing is reduced, and the Tip in working condition order noise is reduced; the spiral angle is trimmed to slightly change the size of the spiral angle, so that the actual tooth surface position deviates from the theoretical tooth surface position, the uneven distribution of the load along the contact line of the gear teeth can be improved, and the Tip in working condition order noise is reduced; the end trimming gradually thins the tooth thickness of the two ends of the gear to the end on a small tooth width, so that the uneven distribution of load along a gear tooth contact line can be improved, and the Tip in working condition order noise is reduced.
The shape modification process mainly aims at the problems that the knocking energy of the retarder under the Tip in working condition is increased and the NVH effect is poor, is a part of the complete gear shape modification process, and comprises a lot of contents so as to solve the three problems.
Preferably, the radius of curvature of the curve at the tooth crest edge of the gear having the addendum modified is increased. The tooth top edge trimming can increase the curvature radius of the curve at the tooth top edge, so that the meshing curve at the tooth top is smooth, the gear meshing interference caused by tooth pitch error and gear tooth deformation is avoided, the gears are in smooth contact when being engaged in and out, the impact is favorably reduced, and the Tip in working condition order noise is reduced.
Preferably, the drum shape amount of the drum shape trimming is 1-20 microns. If the drum shape is too small, the gear meshing trace is unbalanced when the gear is lightly loaded, and if the drum shape is too large, the gear contact trace is slightly small and the transmission error is large when the gear is lightly loaded, so that the drum shape should be properly selected according to the situation to improve the gear contact condition.
Preferably, the 2 input gears are located on both sides of the countershaft pinion. Therefore, the 2 pairs of input stage gear pairs are distributed relatively uniformly along the axial direction and are relatively close to the bearing end, so that the bending moment acting on the input shaft and the intermediate shaft is reduced, the bending deformation of a shaft system is reduced, and the reliability of the system is improved.
Preferably, the 2 input gears are located on the side of the countershaft pinion. Therefore, the 2 pairs of input stage gear pairs are arranged on one side of the intermediate shaft pinion, the intermediate shaft pinion cannot interfere in the middle of the 2 intermediate shaft bull gears, and the arrangement of a speed change structure is facilitated.
The invention has the beneficial effects that: the input stage gear pair of the speed reducer of the pure electric vehicle is increased from a single pair to 2 pairs, and axial forces generated by the input stage gear pair are offset, so that the problems of bearing load increase and shafting movement caused by unbalanced axial force on a shafting are solved, and the input shaft bearing model selection is facilitated; the load of the single input stage gear pair is shared by 2 input stage gear pairs, so that the tooth width of the input stage gear pair can be reduced, the heat dissipation effect of the input stage gear pair is improved, and the probability of gluing failure of the input stage gear pair is reduced; the torque range borne by the input-stage gear pair is reduced, the shaping difficulty of the gear pair is reduced, and the shaping effect of the gear pair is favorably ensured; the tooth width of the input stage gear pair is reduced, so that the gear grinding difficulty is reduced, the quality of the tooth surface profile is improved, and the consistency of the gear after gear grinding is improved.
Drawings
FIG. 1 is a schematic view of the present invention.
FIG. 2 is another schematic of the present invention.
In the figure:
an input shaft 1;
an input gear 2;
an intermediate shaft 3;
an intermediate shaft gearwheel 4;
a counter pinion 5;
an output shaft 6;
a differential gearwheel 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections, either mechanical or electrical, or communicating with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1, a reducer transmission system arrangement structure for a pure electric vehicle includes:
the input shaft 1 is provided with 2 input gears 2, each input gear 2 is a helical gear with the same type, and the rotation directions of the 2 input gears 2 are opposite;
the middle shaft 3 is provided with middle shaft large gears 4 meshed with the input gears 2 one by one, and the models of the middle shaft large gears 4 are the same; an intermediate shaft pinion 5 is arranged on the intermediate shaft 3;
and the output shaft 6 is provided with a differential gear large gear 7 meshed with the intermediate shaft small gear 5.
According to the arrangement structure of the transmission system of the speed reducer for the pure electric vehicle, 2 input gears 2 are arranged on an input shaft 1, the rotation directions of the 2 input gears are opposite, intermediate shaft large gears 4 meshed with the input gears 2 one by one are arranged on an intermediate shaft 3, and each input gear 2 and the intermediate shaft large gear 4 meshed with the input gear form a pair of input stage gear pairs.
According to the reducer transmission system arrangement structure for the pure electric vehicle, the rotating directions of the 2 input gears 2 are opposite, the types are the same, axial forces generated by the input stage gear pair formed in the way are offset, the problems of bearing load increase and shafting movement caused by unbalanced axial force on a shafting are avoided, and the bearing selection of the input shaft 1 is facilitated. The input stage gear pair is changed from a single pair to 2 pairs, and when the bearing is unchanged, the load of the single input stage gear pair is shared by the 2 pairs of input stage gear pairs, so that the tooth width of the input stage gear pair can be reduced, the heat dissipation effect of the input stage gear pair is improved, and the probability of gluing failure of the input stage gear pair is reduced; because the torque range borne by each pair of input stage gear pairs is reduced, the shaping difficulty of the gear pairs is reduced, and the shaping effect of the gear pairs is favorably ensured; the tooth width of the input stage gear pair is reduced, the tooth grinding difficulty is reduced, the quality of the tooth surface profile is improved, and the consistency of the gear after tooth grinding is improved.
Further, the input gear 2 and the intermediate shaft gearwheel 4 are both modified gears. In order to improve the NVH effect, all the input gears 2 and the intermediate shaft large gear 4 must be subjected to shape modification treatment so as to ensure the meshing effect of each pair of gear pairs and reduce vibration and noise. It will be appreciated that since the input stage gear pair changes from a single pair to 2 pairs, the problems in operation are different from the previous ones, such as: the knocking energy of the reducer is increased under the Tip in/out working condition (accelerator is stepped on suddenly/accelerator is stepped on slowly), and the NVH effect is poor; the knocking energy of the reducer is increased under the energy recovery working condition, and the NVH effect is poor; when the input stage gear pair is in different phases, the speed reducer is knocked for many times, and the NVH effect is poor. Therefore, the process for input stage gear pair shape modification of the speed reducer transmission system arrangement structure for the pure electric vehicle is correspondingly adjusted.
Further, the shape modification process of the input gear 2 and the intermediate shaft gearwheel 4 comprises the following steps: addendum trimming, drum trimming, helix angle trimming, and end trimming. After the addendum trimming, the impact of the gear in meshing is reduced, and the Tip in working condition order noise is reduced; the tooth surface of the gear subjected to crowning trimming is crowned with a convex middle part along the width direction, so that the contact condition of the gear is favorably improved, the impact during meshing is reduced, and the Tip in working condition order noise is reduced; the spiral angle is trimmed to slightly change the size of the spiral angle, so that the actual tooth surface position deviates from the theoretical tooth surface position, the uneven distribution of the load along the contact line of the gear teeth can be improved, and the Tip in working condition order noise is reduced; the end trimming gradually thins the tooth thickness of the two ends of the gear to the end on a small tooth width, so that the uneven distribution of load along a gear tooth contact line can be improved, and the Tip in working condition order noise is reduced.
The shape modification process mainly aims at the problems that the knocking energy of the retarder under the Tip in working condition is increased and the NVH effect is poor, is a part of the complete gear shape modification process, and comprises a lot of contents so as to solve the three problems.
Furthermore, the curvature radius of the curve at the tooth crest edge of the gear with the tooth crest trimmed is increased. The tooth top edge trimming can increase the curvature radius of the curve at the tooth top edge, so that the meshing curve at the tooth top is smooth, the gear meshing interference caused by tooth pitch error and gear tooth deformation is avoided, the gears are in smooth contact when being engaged in and out, the impact is favorably reduced, and the Tip in working condition order noise is reduced.
Further, the drum shape amount of drum shape trimming is 1-20 microns. If the drum shape is too small, the gear meshing trace is unbalanced when the gear is lightly loaded, and if the drum shape is too large, the gear contact trace is slightly small and the transmission error is large when the gear is lightly loaded, so that the drum shape should be properly selected according to the situation to improve the gear contact condition.
Further, 2 input gears 2 are located on the counter pinion 5 side. In this way, when the 2 pairs of input stage gear pairs are arranged on the side of the intermediate shaft pinion 5, the intermediate shaft pinion 5 does not interfere with the 2 intermediate shaft large gears 4, which is beneficial to the arrangement of a speed change structure.
The second embodiment is as follows: as shown in fig. 2, a reducer transmission system arrangement structure for a pure electric vehicle includes:
the input shaft 1 is provided with 2 input gears 2, each input gear 2 is a helical gear with the same type, and the rotation directions of the 2 input gears 2 are opposite;
the middle shaft 3 is provided with middle shaft large gears 4 meshed with the input gears 2 one by one, and the models of the middle shaft large gears 4 are the same; an intermediate shaft pinion 5 is arranged on the intermediate shaft 3;
and the output shaft 6 is provided with a differential gear large gear 7 meshed with the intermediate shaft small gear 5.
According to the arrangement structure of the transmission system of the speed reducer for the pure electric vehicle, 2 input gears 2 are arranged on an input shaft 1, the rotation directions of the 2 input gears are opposite, intermediate shaft large gears 4 meshed with the input gears 2 one by one are arranged on an intermediate shaft 3, and each input gear 2 and the intermediate shaft large gear 4 meshed with the input gear form a pair of input stage gear pairs.
According to the reducer transmission system arrangement structure for the pure electric vehicle, the rotating directions of the 2 input gears 2 are opposite, the types are the same, axial forces generated by the input stage gear pair formed in the way are offset, the problems of bearing load increase and shafting movement caused by unbalanced axial force on a shafting are avoided, and the bearing selection of the input shaft 1 is facilitated. The input stage gear pair is changed from a single pair to 2 pairs, and when the bearing is unchanged, the load of the single input stage gear pair is shared by the 2 pairs of input stage gear pairs, so that the tooth width of the input stage gear pair can be reduced, the heat dissipation effect of the input stage gear pair is improved, and the probability of gluing failure of the input stage gear pair is reduced; the torque range borne by each pair of input stage gear pairs is reduced, so that the shaping difficulty of the gear pairs is reduced, and the shaping effect of the gear pairs is favorably ensured; the tooth width of the input stage gear pair is reduced, the tooth grinding difficulty is reduced, the quality of the tooth surface profile is improved, and the consistency of the gear after tooth grinding is improved.
Further, the input gear 2 and the intermediate shaft gearwheel 4 are both modified gears. In order to improve the NVH effect, all the input gears 2 and the intermediate shaft large gear 4 must be subjected to shape modification treatment so as to ensure the meshing effect of each pair of gear pairs and reduce vibration and noise. It will be appreciated that since the input stage gear pair changes from a single pair to 2 pairs, the problems in operation are different from the previous ones, such as: the knocking energy of the reducer is increased under the Tip in/out working condition (accelerator is stepped on suddenly/accelerator is stepped on slowly), and the NVH effect is poor; the knocking energy of the reducer is increased under the energy recovery working condition, and the NVH effect is poor; when the input stage gear pair is in different phases, the speed reducer is knocked for many times, and the NVH effect is poor. Therefore, the process for input stage gear pair shape modification of the speed reducer transmission system arrangement structure for the pure electric vehicle is correspondingly adjusted.
Further, the shape modification process of the input gear 2 and the intermediate shaft gearwheel 4 comprises the following steps: addendum trimming, drum trimming, helix angle trimming, and end trimming. After the addendum trimming, the impact of the gear in meshing is reduced, and the Tip in working condition order noise is reduced; the tooth surface of the gear subjected to crowning trimming is crowned with a convex middle part along the width direction, so that the contact condition of the gear is favorably improved, the impact during meshing is reduced, and the Tip in working condition order noise is reduced; the spiral angle is trimmed to slightly change the size of the spiral angle, so that the actual tooth surface position deviates from the theoretical tooth surface position, the uneven distribution of the load along the contact line of the gear teeth can be improved, and the Tip in working condition order noise is reduced; the end trimming gradually thins the tooth thickness of the two ends of the gear to the end on a small tooth width, so that the uneven distribution of load along a gear tooth contact line can be improved, and the Tip in working condition order noise is reduced.
The shape modification process mainly aims at the problems that the knocking energy of the retarder under the Tip in working condition is increased and the NVH effect is poor, is a part of the complete gear shape modification process, and comprises a lot of contents so as to solve the three problems.
Furthermore, the curvature radius of the curve at the tooth crest edge of the gear with the tooth crest trimmed is increased. The tooth top edge trimming can increase the curvature radius of the curve at the tooth top edge, so that the meshing curve at the tooth top is smooth, the gear meshing interference caused by tooth pitch error and gear tooth deformation is avoided, the gears are in smooth contact when being engaged in and out, the impact is favorably reduced, and the Tip in working condition order noise is reduced.
Further, the drum shape amount of drum shape trimming is 1-20 microns. If the drum shape is too small, the gear meshing trace is unbalanced when the gear is lightly loaded, and if the drum shape is too large, the gear contact trace is slightly small and the transmission error is large when the gear is lightly loaded, so that the drum shape should be properly selected according to the situation to improve the gear contact condition.
Further, 2 input gears are located on both sides of the countershaft pinion. Therefore, the 2 pairs of input stage gear pairs are distributed relatively uniformly along the axial direction and are relatively close to the bearing end, so that the bending moment acting on the input shaft and the intermediate shaft is reduced, the bending deformation of a shaft system is reduced, and the reliability of the system is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a reduction gear transmission system arrangement structure that pure electric vehicles used, characterized by includes:
the input shaft (1) is provided with 2 input gears (2), each input gear (2) is a helical gear with the same type, and the rotation directions of the 2 input gears (2) are opposite;
the middle shaft (3) is provided with middle shaft large gears (4) which are meshed with the input gears (2) one by one, and the models of the middle shaft large gears (4) are the same; an intermediate shaft pinion (5) is arranged on the intermediate shaft (3);
and the output shaft (6) is provided with a differential gear large gear (7) meshed with the intermediate shaft small gear (5).
2. The arrangement structure of the transmission system of the speed reducer for the pure electric vehicle as claimed in claim 1, wherein the input gear (2) and the intermediate shaft gearwheel (4) are both subjected to shape modification.
3. The arrangement structure of the transmission system of the speed reducer for the pure electric vehicle as claimed in claim 2, wherein the modification process of the input gear (2) and the intermediate shaft gearwheel (4) comprises: addendum trimming, drum trimming, helix angle trimming, and end trimming.
4. The reducer transmission system arrangement structure for the pure electric vehicle according to claim 3, wherein a curvature radius of a curve at a tooth crest edge of the gear with the addendum modified edge is increased.
5. The arrangement structure of the transmission system of the speed reducer for the pure electric vehicle as claimed in claim 3, wherein the drum shape trimming drum shape amount is 1-20 microns.
6. A reducer transmission arrangement for a pure electric vehicle according to any one of claims 1 to 5, characterized in that the 2 input gears (2) are located on both sides of the countershaft pinion (5).
7. A reducer transmission arrangement for a pure electric vehicle according to any of claims 1-5, characterized in that the 2 input gears (2) are located on the side of the jackshaft pinion (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110749641.7A CN113669431A (en) | 2021-07-02 | 2021-07-02 | Arrangement structure of transmission system of speed reducer for pure electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110749641.7A CN113669431A (en) | 2021-07-02 | 2021-07-02 | Arrangement structure of transmission system of speed reducer for pure electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113669431A true CN113669431A (en) | 2021-11-19 |
Family
ID=78538431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110749641.7A Pending CN113669431A (en) | 2021-07-02 | 2021-07-02 | Arrangement structure of transmission system of speed reducer for pure electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113669431A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0642594A (en) * | 1992-07-20 | 1994-02-15 | Takashi Takahashi | Gear transmission mechanism |
| CN101774212A (en) * | 2009-12-30 | 2010-07-14 | 张信聪 | Vacuum extruder with herringbone gear |
| CN202182151U (en) * | 2011-08-05 | 2012-04-04 | 山东柳杭减速机有限公司 | Novel decelerator for brick machine |
| CN202901216U (en) * | 2012-09-26 | 2013-04-24 | 天津君晟成套设备有限公司 | Novel herringbone gear and reduction box body employing same |
| JP2019172218A (en) * | 2018-03-29 | 2019-10-10 | トヨタ自動車株式会社 | In wheel motor drive device for vehicle |
-
2021
- 2021-07-02 CN CN202110749641.7A patent/CN113669431A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0642594A (en) * | 1992-07-20 | 1994-02-15 | Takashi Takahashi | Gear transmission mechanism |
| CN101774212A (en) * | 2009-12-30 | 2010-07-14 | 张信聪 | Vacuum extruder with herringbone gear |
| CN202182151U (en) * | 2011-08-05 | 2012-04-04 | 山东柳杭减速机有限公司 | Novel decelerator for brick machine |
| CN202901216U (en) * | 2012-09-26 | 2013-04-24 | 天津君晟成套设备有限公司 | Novel herringbone gear and reduction box body employing same |
| JP2019172218A (en) * | 2018-03-29 | 2019-10-10 | トヨタ自動車株式会社 | In wheel motor drive device for vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 王斌: "《低噪声齿轮制造技术》", 30 April 2018, 武汉大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107830116B (en) | Point-line meshing helical gear pair with large bearing capacity and small vibration | |
| US20050164824A1 (en) | Epicyclic gear train | |
| CN106352025A (en) | Harmonic speed reducer | |
| CN2520435Y (en) | Backlash-less engaging gear | |
| CN216045230U (en) | Arrangement structure of transmission system of speed reducer for pure electric vehicle | |
| CN113669431A (en) | Arrangement structure of transmission system of speed reducer for pure electric vehicle | |
| CN111637193B (en) | Inner gearing helical gear transmission mechanism | |
| CN201083251Y (en) | Small mode number high power worm wheel worm gear pair | |
| CN111637200A (en) | Helical gear planetary transmission mechanism | |
| CN103234006A (en) | Differential gear train of double circular arc modified cycloid gear | |
| CN201496509U (en) | Male and female full rolling gear | |
| CN2856594Y (en) | Concave gear drive | |
| CN211624096U (en) | Speed reducer with Niemann tooth-shaped worm gear and worm for rotary support | |
| CN205918855U (en) | Stepless gearbox | |
| CN111895068A (en) | Rack and pinion pair with variable transmission clearance characteristic and automobile steering gear | |
| CN2506809Y (en) | Drum shape teeth type coupling | |
| CN203189631U (en) | Double-arc correcting cycloid gear differential gear train | |
| CN203809612U (en) | Double-circular-arc correction cycloid gear planetary gear train | |
| CN201896912U (en) | Transmission mechanism for transmission between spatial intersecting shafts | |
| CN1082158C (en) | Gear-rack with only rolling contact and its cutting tool | |
| CN219588049U (en) | Differential mechanism assembly | |
| CN216692086U (en) | Speed change mechanism and transmission assembly | |
| CN102996755A (en) | Transmission shaft | |
| CN211202608U (en) | Wheel hub bearing and car | |
| CN114278715B (en) | Tooth profile design method of harmonic reducer |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211119 |
|
| RJ01 | Rejection of invention patent application after publication |