CN215762001U - Double-speed reducing mechanism for starter - Google Patents
Double-speed reducing mechanism for starter Download PDFInfo
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- CN215762001U CN215762001U CN202121922302.6U CN202121922302U CN215762001U CN 215762001 U CN215762001 U CN 215762001U CN 202121922302 U CN202121922302 U CN 202121922302U CN 215762001 U CN215762001 U CN 215762001U
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- isolator
- gear
- driving gear
- shifting fork
- planet
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Abstract
The utility model discloses a double-reduction mechanism for a starter, which relates to the technical field of automobile starters and comprises a planet wheel primary reduction gear and a gear secondary reduction gear; the planet wheel primary speed reducing device comprises a planet shaft, a plurality of planet wheels, a speed reducing gear ring and a mounting rack assembly; the planet shaft is rotatably arranged on the mounting frame assembly, and the planet wheels are rotatably arranged on the planet shaft and positioned in the speed reduction gear ring to be meshed with the speed reduction gear ring; the gear secondary speed reducing device comprises an isolator, a driving gear, a driving shaft, a driving gear shifting fork and an isolator shifting fork; the one-way device is arranged on the planet shaft in a sliding way, the one-way device is provided with a one-way device gear, and the driving gear is arranged on the driving shaft in a sliding way and is meshed with the one-way device gear; one end of the driving gear shifting fork is connected with the isolator, and the other end of the driving gear shifting fork is connected with the driving gear; the isolator shifting fork is movably connected with the isolator. The utility model decelerates the rotation output by the armature twice, the deceleration ratio is high, and the output torque is large, so as to start the automobile engine.
Description
Technical Field
The utility model relates to the technical field of automobile starters, in particular to a double-speed reducing mechanism for a starter.
Background
The starter is also called a motor, and converts electric energy into mechanical energy to drive the flywheel of the engine to rotate so as to start the engine. The starter is divided into a direct current starter, a gasoline starter, a compressed air starter and the like according to the working principle. The direct current starters are mostly adopted in internal combustion engines, and are characterized by compact structure, simple operation and convenient maintenance. The dc starter, which is used exclusively to start the engine, requires a strong torque, and therefore, the amount of current to be passed is large, reaching several hundred amperes.
At present, the starting of an automobile engine is realized through external force, and a common starting mode is starting through a direct-current starter. In a dc starter, the rotation speed of an armature is high and the output torque is small, and in order to increase the output torque of the starter, a reduction mechanism is often connected to the output end of the armature to allow the starter to output a high torque.
For example, in the prior art, chinese patent application No. CN202021981422.9 discloses a novel transmission shaft assembly for a planetary reduction dc starter, which relates to the technical field of starters. The starter comprises a planetary transmission shaft, a driving gear connecting sleeve, a middle connecting disc, a speed reduction gear ring, a planetary shaft transmission connecting sleeve, a planetary gear and a mounting frame, wherein after the starter is started, an armature drives the planetary gear to rotate along the inner ring of the speed reduction gear ring through shaft teeth, and simultaneously drives the planetary transmission shaft to rotate, the planetary shaft transmission connecting sleeve is driven to rotate by the planetary transmission shaft, the middle connecting disc of the planetary shaft transmission connecting sleeve rotates, the middle connecting disc drives the driving gear connecting sleeve to rotate, the driving gear connecting sleeve drives the driving gear to rotate, and the driving gear drives an engine flywheel to rotate, so that the engine is started. The transmission shaft assembly provided by the utility model meets the requirement on the service life of the motor, the starting frequency and the sum frequency are multiplied, the service life of the motor is more than 30 ten thousand times, and the performance requirements of a new energy hybrid electric vehicle on the high starting frequency and the high starting frequency of a starter are met.
In the above patent, the rotation output from the armature is decelerated by the planetary gear and the reduction ring gear, so that the starter outputs a high torque. However, for some automobile engines which need higher torque to start, the transmission shaft assembly for the starter is only provided with one-time speed reduction, so that the output torque is relatively low, and the starting requirement of the automobile engine cannot be met.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model aims to provide a double speed reducing mechanism for a starter, which is used for starting an automobile engine by reducing the speed of the rotation output by an armature twice, wherein the speed reducing ratio is high, and the output torque is large.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a double reduction mechanism for a starter comprises a planet wheel primary reduction gear and a gear secondary reduction gear;
the planet wheel primary speed reducing device comprises a planet shaft, a plurality of planet wheels, a speed reducing gear ring and a mounting rack assembly; the planet shaft is rotatably arranged on the mounting frame assembly, and the planet wheels are rotatably arranged on the planet shaft and positioned in the speed reduction gear ring to be meshed with the speed reduction gear ring;
the gear secondary speed reducing device comprises an isolator, a driving gear, a driving shaft, a driving gear shifting fork and an isolator shifting fork; the isolator is arranged on the planet shaft in a sliding mode, and an isolator gear is arranged on the isolator; the driving gear is slidably mounted on the driving shaft and meshed with the one-way gear, and the outer diameter of the driving gear is larger than that of the one-way gear; one end of the driving gear shifting fork is connected with the isolator, and the other end of the driving gear shifting fork is connected with the driving gear; the isolator shifting fork is movably connected with the isolator and drives the isolator and the driving gear to synchronously move, so that the driving gear is meshed with or separated from a flywheel of the engine.
Furthermore, a planet wheel mounting disc is arranged at the rear end of the planet shaft, and a plurality of planet wheel mounting columns are arranged on the planet wheel mounting disc.
Furthermore, a positioning clamping ring used for limiting the rear end position of the isolator and a speed reduction gear ring adjusting pad used for adjusting the axial position of the speed reduction gear ring on the planet shaft are arranged on the planet shaft.
Further, the isolator is cylindricly that runs through, the planet axle front end passes the isolator, the isolator gear sets up the isolator front end, and the isolator outer wall middle part is seted up and is pressed from both sides the groove on the drive gear shift fork, and isolator outer wall rear end is provided with isolator shift fork hinge interface.
Furthermore, the driving gear is positioned below the isolator, and a lower clamping groove of a shifting fork of the driving gear is arranged on the driving gear.
Further, the front end of the driving shaft is provided with a flat milling platform for radially stopping rotation of the driving shaft.
Furthermore, the upper part of the driving gear shifting fork is provided with a driving gear shifting fork upper clamping opening matched with the driving gear shifting fork upper clamping groove, and the lower part of the driving gear shifting fork upper clamping opening matched with the driving gear shifting fork lower clamping groove.
Furthermore, the upper part of the isolator shifting fork is provided with an isolator shifting fork upper opening, the middle part of the isolator shifting fork is provided with a rotating fulcrum, and the lower part of the isolator shifting fork lower clamping opening.
Furthermore, a blocking sleeve is arranged on the outer wall of the front end of the isolator, and a steel wire clamping ring clamped on the side wall of the isolator is arranged in the blocking sleeve.
Further, the rear end of the driving shaft is sleeved with a compression spring.
The utility model has the beneficial effects that:
1. in the utility model, for the rotation output by the armature, the first-stage speed reducing device of the planet wheel reduces the speed of the rotation for the first time, the second-stage speed reducing device of the gear reduces the speed of the rotation for the second time, the speed reduction and speed reduction ratios of the two times are high, and the output torque is large, so that an automobile engine which can be started only by large torque can be smoothly started.
2. When the automobile engine is started, the shifting fork of the isolator rotates to drive the isolator at the lower end of the shifting fork to move forwards, and when the isolator moves forwards, the shifting fork of the driving gear synchronously drives the driving gear to move forwards so that the driving gear is meshed with a flywheel of the engine; meanwhile, the rotation of the armature is decelerated at the first stage through the planet gear and the deceleration gear ring, and decelerated at the second stage through the isolator and the driving gear, and finally transmitted to the driving gear, and the driving gear drives the flywheel of the engine to rotate, so that the starting of the automobile engine is realized.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view of a planetary gear primary reduction gear of the present invention;
FIG. 3 is a schematic view of a planet axle of the present invention;
FIG. 4 is a schematic view of the gear reduction stage of the present invention;
FIG. 5 is a schematic view of an isolator according to the present invention;
FIG. 6 is a schematic view of the drive gear of the present invention;
FIG. 7 is a schematic view of the drive gear fork of the present invention;
FIG. 8 is a schematic view of a one-way clutch fork of the present invention;
reference numerals:
1. a planet wheel primary speed reducing device; 11. a planet shaft; 111. a planet wheel mounting disc; 112. a planet wheel mounting post; 12. a planet wheel; 13. a reduction gear ring; 14. a mounting bracket assembly; 15. a positioning collar; 16. a reduction gear ring adjusting pad; 2. a gear secondary reduction unit; 21. a one-way clutch; 211. an isolator gear; 212. a clamping groove is formed in the shifting fork of the driving gear; 213. a isolator shift fork hinge interface; 22. a drive gear; 221. a lower clamping groove of a shifting fork of the driving gear; 23. a drive shaft; 231. milling a flat platform; 24. driving a gear shifting fork; 241. driving a gear shifting fork to clamp the opening; 242. a lower clamping opening of a shifting fork of the driving gear; 25. a one-way clutch shift fork; 251. the isolator shifting fork is provided with an upper opening; 252. a rotation fulcrum; 253. a lower clamping opening of the isolator shifting fork; 26. a blocking sleeve; 27. a steel wire retainer ring; 28. compressing the spring.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Example 1
A double reduction mechanism for a starter is shown in figures 1-8 and comprises a planetary wheel primary reduction gear 1 and a gear secondary reduction gear 2.
The planet wheel primary speed reducing device 1 comprises a planet shaft 11, a plurality of planet wheels 12, a speed reducing gear ring 13 and a mounting rack assembly 14; the planet shaft 11 is rotatably mounted on the mounting frame assembly 14, and the plurality of planet wheels 12 are rotatably mounted on the planet shaft 11 and positioned in the reduction gear ring 13 to be meshed with the reduction gear ring 13.
The gear two-stage speed reduction device 2 comprises an isolator 21, a driving gear 22, a driving shaft 23, a driving gear shifting fork 24 and an isolator shifting fork 25; the one-way clutch 21 is slidably mounted on the planet shaft 11, and the one-way clutch 21 is provided with a one-way clutch gear 211; the drive gear 22 is slidably mounted on the drive shaft 23 and engaged with the one-way gear 211, and the outer diameter of the drive gear 22 is larger than that of the one-way gear 211; one end of a driving gear shifting fork 24 is connected with the isolator 21, and the other end is connected with the driving gear 22; the one-way clutch shift fork 25 is movably connected with the one-way clutch 21 and drives the one-way clutch 21 and the driving gear 22 to synchronously move, so that the driving gear 22 is meshed with or separated from a flywheel of the engine.
In this embodiment, the primary planet gear speed reducer 1 is used for reducing the speed of the rotation output by the armature once, wherein the planet shaft 11 is used for transmitting the reduced rotation, the planet gear 12 and the speed reduction gear ring 13 are used for reducing the speed of the rotation output by the armature, and the mounting frame assembly 14 is used for mounting the planet shaft 11 and the speed reduction gear ring 13. As shown in fig. 2, three planetary gears 12 are provided, and the inner ends of the three planetary gears 12 are engaged with the armature gear of the armature, and the outer ends thereof are engaged with the reduction ring gear 13.
The gear two-stage speed reducer 2 is used for carrying out secondary speed reduction on the rotation output by the armature so as to output larger torque and further start an automobile engine. Wherein the one-way clutch 21 and the driving gear 22 are used to transmit the rotation while slowing down the rotation. Specifically, as shown in fig. 4, the one-way gear 211 of the one-way clutch 21 is a pinion gear, and the drive gear 22 is a bull gear, so that both can decelerate the rotation. The driving shaft 23 is used for mounting the driving gear 22, the driving gear shift fork 24 is used for enabling the isolator 21 and the driving gear 22 to advance and retreat together, and the isolator shift fork 25 is used for controlling the isolator 21 and the driving gear 22 to advance and retreat together, so that the driving gear 22 is meshed with or separated from a flywheel of an engine.
The double reduction mechanism of the present embodiment is supported and fixed in the starter mainly by the mounting bracket assembly 14, the planetary shaft 11 and the drive shaft 23. The first-stage speed reduction is realized by the armature gear of the armature and the internal teeth of the speed reduction gear ring 13 through the planet wheel 12 and the planet shaft 11, and the first-stage speed reduction ratio of the embodiment is 3.08. The two-stage speed reduction is completed by meshing the one-way gear 211 with the driving gear 22, and the speed reduction ratio of the two-stage speed reduction mechanism is 1.73, so that the speed reduction ratio of the double-speed reduction mechanism is 5.33, which is quite large, and the output torque is correspondingly large.
Example 2
In this embodiment, a further improvement is made on the basis of embodiment 1, as shown in fig. 1 to 3, a planet wheel mounting plate 111 is provided at the rear end of the planet shaft 11, and three planet wheel mounting columns 112 are provided on the planet wheel mounting plate 111 for mounting three planet wheels 12.
The planet shaft 11 is provided with a positioning retainer ring 15 for limiting the rear end position of the one-way clutch 21, and a reduction gear ring adjusting pad 16 for adjusting the axial position of the reduction gear ring 13 on the planet shaft 11.
Example 3
In this embodiment, a further improvement is made on the basis of embodiment 2, as shown in fig. 1 and 5, the isolator 21 is a through cylinder, the front end of the planet shaft 11 passes through the isolator 21, the isolator gear 211 is arranged at the front end of the isolator 21, the middle part of the outer wall of the isolator 21 is provided with a driving gear fork upper clamping groove 212 for mounting the driving gear fork 24, and the rear end of the outer wall of the isolator 21 is provided with an isolator fork hinge port 213 for mounting the isolator fork 25.
As shown in fig. 1 and 6, the driving gear 22 is located below the one-way clutch 21, and a driving gear fork lower clamping groove 221 for mounting the driving gear fork 24 is provided on the driving gear 22.
As shown in fig. 1, a mill flattening table 231 for radially stopping rotation of the drive shaft 23 is provided at the tip end of the drive shaft 23, and when the drive shaft 23 needs to be radially stopped, a pin is engaged with the mill flattening table 231 to radially stop rotation of the drive shaft 23.
As shown in fig. 1 and 7, the upper portion of the driving gear fork 24 is provided with an upper driving gear fork clamping opening 241 adapted to the upper driving gear fork clamping groove 212, and the lower portion thereof is provided with a lower driving gear fork clamping opening 242 adapted to the lower driving gear fork clamping groove 221, and the upper driving gear fork clamping opening 241 and the lower driving gear fork clamping opening 242 are respectively connected to the upper driving gear fork clamping groove 212 and the lower driving gear fork clamping groove 221, so that the isolator 21 and the driving gear 22 synchronously move to advance and retract together.
As shown in fig. 1 and 8, the isolator shift fork 25 is provided at an upper portion thereof with an isolator shift fork upper opening 251, at a middle portion thereof with a rotation fulcrum 252, and at a lower portion thereof with an isolator shift fork lower nip 253. An electromagnetic switch is connected to the upper opening 251 of the isolator shift fork, and the rotation of the isolator shift fork 25 around the rotation fulcrum 252 is controlled by the electromagnetic switch, so that the isolator 21 connected to the lower grip 253 of the isolator shift fork moves back and forth.
As shown in fig. 1, a retaining sleeve 26 is provided on the outer wall of the front end of the one-way device 21, and a wire clip 27 clamped on the side wall of the one-way device 21 is provided in the retaining sleeve 26. The retaining sleeve 26 and the wire retainer 27 are used for limiting the position of the front end of the one-way clutch 21, specifically, the retaining sleeve 26 is in contact with the shell of the starter, the shell limits the forward movement of the retaining sleeve 26, and the retaining sleeve 26 limits the position of the front end of the one-way clutch 21 through the wire retainer 27.
As shown in fig. 1, the rear end of the driving shaft 23 is sleeved with a compression spring 28, two ends of the driving shaft 23 are fixed on the front cover of the starter in a hole-shaft assembly mode, and the total length of the driving shaft 23 is greater than the distance between the end surfaces of two matching holes, so that the shaft is assembled by firstly installing the shaft into one end with the compression spring 28, the spring can be installed only after the compression, the other end of the driving shaft can be installed only after the compression of the spring, and the driving shaft 23 is fixed at a proper axial position through the resilience of the spring.
For a better understanding of the present invention, the following is a complete description of the working principle of the present invention:
when the clutch works, the electromagnetic switch controls the one-way device shifting fork 25 to rotate by taking the rotating fulcrum 252 as a center, so that the one-way device 21 connected with the lower clamping opening 253 of the one-way device shifting fork moves forwards, the one-way device 21 drives the driving gear 22 to synchronously move forwards through the driving gear shifting fork 24, and the driving gear 22 is meshed with a flywheel of an engine.
Meanwhile, an armature gear of the armature drives the planet wheel 12 to rotate in the speed reduction gear ring 13 and drives the planet shaft 11 to rotate, so that the rotation output by the armature is subjected to primary speed reduction; the planet shaft 11 drives the one-way clutch 21 to rotate, the one-way clutch gear 211 of the one-way clutch 21 drives the driving gear 22 to rotate, the rotation output by the armature is decelerated for the second time, and finally the driving gear 22 drives the flywheel of the engine to rotate, so that the starting of the automobile engine is realized.
After the engine is started, the electromagnetic switch controls the shifting fork 25 of the isolator to rotate in the reverse direction, so that the driving gear 22 retreats and is separated from the flywheel of the engine, and simultaneously the armature is controlled to stop rotating, so that the driving gear 22 stops rotating.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and the equivalents or substitutions are included in the scope of the present invention defined by the claims.
Claims (10)
1. A kind of starter uses the double reduction gear, characterized by that: comprises a planet wheel primary speed reducer (1) and a gear secondary speed reducer (2);
the planet wheel primary speed reducing device (1) comprises a planet shaft (11), a plurality of planet wheels (12), a speed reducing gear ring (13) and a mounting rack assembly (14); the planet shaft (11) is rotatably mounted on the mounting rack assembly (14), and the planet wheels (12) are rotatably mounted on the planet shaft (11) and positioned in the reduction gear ring (13) to be meshed with the reduction gear ring (13);
the gear two-stage speed reduction device (2) comprises a one-way device (21), a driving gear (22), a driving shaft (23), a driving gear shifting fork (24) and a one-way device shifting fork (25); the one-way clutch (21) is slidably mounted on the planet shaft (11), and a one-way clutch gear (211) is arranged on the one-way clutch (21); the driving gear (22) is slidably mounted on the driving shaft (23) and meshed with the one-way gear (211), and the outer diameter of the driving gear (22) is larger than that of the one-way gear (211); one end of the driving gear shifting fork (24) is connected with the one-way device (21), and the other end of the driving gear shifting fork is connected with the driving gear (22); the isolator shifting fork (25) is movably connected with the isolator (21) and drives the isolator (21) and the driving gear (22) to synchronously move, so that the driving gear (22) is meshed with or separated from a flywheel of an engine.
2. The double reduction mechanism for a starter according to claim 1, wherein: the rear end of the planet shaft (11) is provided with a planet wheel mounting disc (111), and a plurality of planet wheel mounting columns (112) are arranged on the planet wheel mounting disc (111).
3. The double reduction mechanism for a starter according to claim 1, wherein: and a positioning clamping ring (15) used for limiting the rear end position of the isolator (21) and a speed reduction gear ring adjusting pad (16) used for adjusting the axial position of the speed reduction gear ring (13) on the planet shaft (11) are arranged on the planet shaft (11).
4. The double reduction mechanism for a starter according to claim 1, wherein: isolator (21) are the cylindric that runs through, planet axle (11) front end passes isolator (21), isolator gear (211) set up isolator (21) front end, and isolator (21) outer wall middle part has been seted up on the drive gear shift fork and has been pressed from both sides groove (212), and isolator (21) outer wall rear end is provided with isolator shift fork hinge interface (213).
5. The double reduction mechanism for a starter according to claim 4, wherein: the driving gear (22) is located below the isolator (21), and a lower clamping groove (221) of a driving gear shifting fork is arranged on the driving gear (22).
6. The double reduction mechanism for a starter according to claim 1, wherein: the front end of the driving shaft (23) is provided with a milling flat platform (231) used for radially stopping the driving shaft (23).
7. The double reduction mechanism for a starter according to claim 5, wherein: the upper part of the driving gear shifting fork (24) is provided with a driving gear shifting fork upper clamping opening (241) matched with the driving gear shifting fork upper clamping groove (212), and the lower part of the driving gear shifting fork upper clamping opening is provided with a driving gear shifting fork lower clamping opening (242) matched with the driving gear shifting fork lower clamping groove (221).
8. The double reduction mechanism for a starter according to claim 4, wherein: the upper part of the isolator shifting fork (25) is provided with an isolator shifting fork upper opening (251), the middle part is provided with a rotating fulcrum (252), and the lower part is provided with an isolator shifting fork lower clamping opening (253).
9. The double reduction mechanism for a starter according to claim 1, wherein: a blocking sleeve (26) is arranged on the outer wall of the front end of the isolator (21), and a steel wire clamping ring (27) clamped on the side wall of the isolator (21) is arranged in the blocking sleeve (26).
10. The double reduction mechanism for a starter according to claim 1, wherein: the rear end of the driving shaft (23) is sleeved with a compression spring (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121922302.6U CN215762001U (en) | 2021-08-17 | 2021-08-17 | Double-speed reducing mechanism for starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121922302.6U CN215762001U (en) | 2021-08-17 | 2021-08-17 | Double-speed reducing mechanism for starter |
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| Publication Number | Publication Date |
|---|---|
| CN215762001U true CN215762001U (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121922302.6U Active CN215762001U (en) | 2021-08-17 | 2021-08-17 | Double-speed reducing mechanism for starter |
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| CN (1) | CN215762001U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116277133A (en) * | 2023-05-19 | 2023-06-23 | 江苏万基传动科技有限公司 | Single-motor double-speed reducer robot joint structure |
-
2021
- 2021-08-17 CN CN202121922302.6U patent/CN215762001U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116277133A (en) * | 2023-05-19 | 2023-06-23 | 江苏万基传动科技有限公司 | Single-motor double-speed reducer robot joint structure |
| CN116277133B (en) * | 2023-05-19 | 2023-08-18 | 江苏万基传动科技有限公司 | Single-motor double-speed reducer robot joint structure |
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