CN212202998U - Double-speed reducer - Google Patents
Double-speed reducer Download PDFInfo
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- CN212202998U CN212202998U CN202020179088.9U CN202020179088U CN212202998U CN 212202998 U CN212202998 U CN 212202998U CN 202020179088 U CN202020179088 U CN 202020179088U CN 212202998 U CN212202998 U CN 212202998U
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- friction plate
- plunger
- planet carrier
- gear
- sun gear
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Abstract
The invention discloses a double-speed reducer, which comprises a first planetary reduction mechanism and a second planetary reduction mechanism, wherein the first planetary reduction mechanism comprises a first sun gear, a first planet carrier, a first gear ring and a first plunger, the first planet carrier is provided with a first planetary gear meshed with the first sun gear and the first gear ring, the first sun gear is connected with an input shaft, a first clutch device comprises a first friction plate and a second friction plate, the first friction plate is fixed on the first sun gear, the second friction plate is fixed on the first planet carrier, the first plunger is connected on the inner wall of a shell in a sliding manner, the first plunger comprises a first part and a second part, the first part is provided with a blind hole, a first spring is arranged in the blind hole, and one end face of the second part is contacted with the second friction plate, a first magnet and a second magnet are arranged on the opposite surfaces of the first part and the second part.
Description
Technical Field
The present invention relates to a reduction gear, and more particularly, to a reduction gear having two reduction ratios.
Background
The general speed reducer only has a fixed speed reduction ratio, and the speed reducer is not suitable for occasions with large output torque variation. Of course, there are speed reducers with various transmission ratios, such as automobile gearboxes, but these structures are complicated and currently only mastered by a few enterprises.
I another prior application discloses a speed reducer with two gear ratios, which comprises a first planetary speed reducing mechanism and a second planetary speed reducing mechanism, wherein the first planetary speed reducing mechanism comprises a first sun gear, a first planet carrier, a first gear ring and a first plunger, the first planet carrier is provided with a first planetary gear meshed with the first sun gear and the first gear ring, the first sun gear is connected with an input shaft, a first clutch device comprises a first friction plate and a second friction plate, the first friction plate is fixed on the first sun gear, the second friction plate is fixed on the first planet carrier, the first plunger is connected on the inner wall of a shell in a sliding manner, the first plunger is provided with a first spring for pushing the first plunger to the first friction plate, the shell is provided with a first hydraulic passage, in the ordinary state, under the effect of first spring, first plunger is tight with first friction disc and second friction disc top, first planet frame locking is in on the first sun gear, to after hydraulic oil was sent into to first hydraulic passage, first plunger leaves first clutch, first planet frame unblock, first plunger includes first part, second part and bearing, first part sliding connection is in the shell, the bearing outer lane is fixed the inner circle of first part, the inner circle of bearing is connected the outer lane of second part, first part with the surface that the shell contacted is located first hydraulic passage both sides respectively are provided with a sealing washer.
One problem with such a two-speed reducer is that the first plunger is divided into two parts which need to rotate relative to each other, so that the two parts are connected together by a roller bearing. Wherein the portion in contact with the first spring is in contact with the outer race of the bearing and the portion in contact with the friction plate is in contact with the inner race of the roller bearing. In this way, the transmitted tightening force causes a shearing force to exist between the outer ring and the inner ring of the bearing, which may cause problems in the operation of the bearing after a long time, and even cause dislocation failure of the bearing, so that improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a double-speed reducer which can realize two speed change ratios, and the problem of dislocation of the inner ring and the outer ring of a bearing at a first plunger cannot exist.
The invention is realized by the following technical scheme: a double-speed reducer comprises a first planetary reduction mechanism and a second planetary reduction mechanism, wherein the first planetary reduction mechanism comprises a first sun gear, a first planet carrier, a first gear ring and a first plunger, the first planet carrier is provided with a first planetary gear meshed with the first sun gear and the first gear ring, the first sun gear is connected with an input shaft, a first clutch device comprises a first friction plate and a second friction plate, the first friction plate is fixed on the first sun gear, the second friction plate is fixed on the first planet carrier, the double-speed reducer further comprises a shell, the shell is provided with a first hydraulic channel, the first plunger is connected on the inner wall of the shell in a sliding manner, the first plunger is provided with a first spring for pushing the first plunger to the first friction plate, and the first spring is locked on the first sun gear in a normal state, after hydraulic oil is sent into to first hydraulic passage, first plunger leaves first clutch, first planet carrier unblock, first plunger includes first portion and second portion, be provided with the blind hole on the first portion, first spring sets up in the blind hole, a second portion terminal surface with the second friction disc contacts, the first portion with be provided with first magnet and second magnet on the relative one side of second portion, first magnet with the one side that the second magnet magnetic pole is the same sets up relatively, first hydraulic passage is located between first portion and the second portion at the internal face of shell, the first portion with the outer lane of second portion is provided with first sealing washer and second sealing washer respectively. When the bearing is used, the first part has the jacking force towards the second part by virtue of the elasticity of the first spring, and the first magnet and the second magnet repel each other in the same polarity, so that the jacking force is transmitted to the second part by the first part, the second part pushes the friction plates to be combined, and the first part and the second part cannot be contacted with each other, so that the rolling friction force generated by the original installation of the bearing is avoided.
In the above technical scheme, it is preferable that the planetary gear set further includes a second planetary reduction mechanism, the second planetary reduction mechanism includes a second sun gear, a second planet carrier and a second gear ring, the second planet carrier is provided with a second planetary gear engaged with the second sun gear and the second gear ring, the second sun gear is connected with the first planet carrier, the second planet carrier is connected with the output shaft, and the second clutch device is responsible for locking the first gear ring.
In the above technical solution, preferably, the second clutch device is a friction plate clutch.
In the above technical solution, preferably, the second clutch device includes a third friction plate and a fourth friction plate, the third friction plate is fixed to the first gear ring, and the fourth friction plate is connected to the outer shell.
In the above technical solution, preferably, there are a plurality of the first friction plate and the second friction plate, the first friction plate and the second friction plate are arranged at intervals, the third friction plate and the fourth friction plate are arranged at intervals, and the third friction plate and the fourth friction plate are arranged at intervals.
Among the above-mentioned technical scheme, it is preferred, second clutch still includes the second plunger, second plunger sliding connection is in on the shell inner wall, be provided with on the second plunger with the second plunger top to the second spring of third friction disc, be provided with the second hydraulic passage on the shell, when ordinary state under the effect of second spring, the second plunger is tight with third friction disc and fourth friction disc top, the second planet carrier locking is in on the shell, to after the second hydraulic passage sent into hydraulic oil, the second plunger leaves second clutch, the second planet carrier unblock.
The invention has the following beneficial effects: when the bearing is used, the first part has the jacking force towards the second part by virtue of the elasticity of the first spring, and the first magnet and the second magnet repel each other in the same polarity, so that the jacking force is transmitted to the second part by the first part, the second part pushes the friction plates to be combined, and the first part and the second part cannot be contacted with each other, so that the rolling friction force generated by the original installation of the bearing is avoided.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of a portion B in fig. 1.
Fig. 3 is a partially enlarged schematic view of a portion a of fig. 1.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
referring to fig. 1 to 3, the two-speed reducer includes a first planetary reduction mechanism 1 and a second planetary reduction mechanism 2, the first planetary reduction mechanism 1 includes a first sun gear 11, a first carrier 12, and a first ring gear 13, a first planetary gear 14 engaged with the first sun gear 11 and the first ring gear 13 is provided on the first carrier 12, and the first sun gear 11 is connected to an input shaft.
The second planetary reduction mechanism 2 includes a first sun gear 21, a second planet carrier 22 and a second ring gear 23, the second planet carrier 22 is provided with a second planetary gear 24 engaged with the second sun gear 21 and the second ring gear 23, the second sun gear 21 is connected with the first planet carrier 12, and the second planet carrier 22 is connected with an output shaft.
The planetary gear transmission mechanism further comprises a first clutch device 3 and a second clutch device 4, wherein the first clutch device is responsible for locking the first planet carrier, and the second clutch device is responsible for locking the first gear ring. The first clutch device and the second clutch device are both friction plate clutches.
The first clutch device 3 includes a first friction plate 31 and a second friction plate 32, the first friction plate 31 and the second friction plate 32 have a plurality of plates, and the first friction plate 31 and the second friction plate 32 are spaced from each other. The first friction plate 31 is fixed on the first sun gear 11, the second friction plate 32 is fixed on the first planet carrier 12, the first clutch device 3 further includes a first plunger 33, the first plunger 33 is slidably connected to an inner wall of the outer shell 5, a first spring 34 for urging the first plunger 33 against the first friction plate 31 is arranged on the first plunger 33, a first hydraulic passage 51 is arranged on the outer shell 5, the first plunger 33 includes a first portion 331 and a second portion 332, a blind hole 33a is arranged on the first portion 331, the first spring 34 is arranged in the blind hole 33a, one end surface of the second portion 332 contacts with the second friction plate 32, a first magnet 35 and a second magnet 36 are arranged on a surface of the first portion 331 opposite to the second portion 332, a surface of the first magnet 35 having the same magnetic pole as that of the second magnet 36 is arranged opposite to the surface, the through opening of the first hydraulic passage 51 on the inner surface of the housing 5 is located between the first and second portions 331 and 332, and the outer rings of the first and second portions 331 and 332 are provided with the first and second seal rings 33b and 33c, respectively.
The first plunger 33 comprises a first part 331, a second part 332 and a bearing 333, the first part 331 is slidably connected in the housing 5, an outer ring of the bearing 333 is fixed on an inner ring of the first part 331, an inner ring of the bearing 333 is connected on an outer ring of the second part 332, and a sealing ring 6 is respectively arranged on two sides of the first hydraulic passage 51 on a surface of the first part 331, which is in contact with the housing 5. In a normal state, under the action of the first spring 34, the second portion 332 presses the first friction plate 31 and the second friction plate 32 tightly, the first planet carrier 22 is locked on the first sun gear 11, after hydraulic oil is fed into the first hydraulic passage, the first plunger is separated from the first clutch device, and the first planet carrier is unlocked.
The second clutch device 4 includes a third friction plate 41 and a fourth friction plate 42, and the third friction plate 41 and the fourth friction plate 42 have a plurality of plates, and the plurality of plates are arranged at intervals. The third friction plate 41 is fixed to the first ring gear 13, and the fourth friction plate 42 is connected to the outer case 5. Second clutch 4 still includes second plunger 43, second plunger 43 sliding connection is in on the 5 inner walls of shell, be provided with on the second plunger 43 with second plunger 43 pushes up to the second spring 44 of third friction disc 42, be provided with second hydraulic passage 52 on the shell 5, when ordinary state under the effect of second spring, the second plunger is tight in third friction disc and fourth friction disc top, the second planet carrier locking is in on the shell, to after the second hydraulic passage sent into hydraulic oil, the second plunger leaves second clutch, the second planet carrier unblock.
When the planetary speed reducer is used, if the first planet carrier is locked and the first gear ring is unlocked, the first planetary speed reducing mechanism does not work at this time, the rotating speed of the input shaft is directly output to the second planetary speed reducing mechanism, and the speed reducing ratio of the speed reducing mechanism is the speed reducing ratio of the second planetary speed reducing mechanism. If we unlock the first planet carrier and lock the first ring gear, at this time, the speed of the system output is the reduction ratio of the first planetary reduction mechanism multiplied by the reduction ratio of the second planetary reduction mechanism. Therefore, the system can conveniently realize two speed reduction ratios.
Claims (6)
1. A double-speed reducer comprises a first planetary reduction mechanism and a second planetary reduction mechanism, wherein the first planetary reduction mechanism comprises a first sun gear, a first planet carrier, a first gear ring and a first plunger, the first planet carrier is provided with a first planetary gear meshed with the first sun gear and the first gear ring, the first sun gear is connected with an input shaft, the double-speed reducer further comprises a first clutch device, the first clutch device comprises a first friction plate and a second friction plate, the first friction plate is fixed on the first sun gear, the second friction plate is fixed on the first planet carrier, the double-speed reducer further comprises a shell, the shell is provided with a first hydraulic channel, the first plunger is connected on the inner wall of the shell in a sliding manner, the first plunger is provided with a first spring for pushing the first plunger to the first friction plate, the first spring is locked on the first sun gear, after hydraulic oil is sent to the first hydraulic channel, the first plunger is separated from the first clutch device, the first planet carrier is unlocked, and the first clutch device is characterized in that: the first plunger comprises a first portion and a second portion, a blind hole is formed in the first portion, the first spring is arranged in the blind hole, one end face of the second portion is in contact with the second friction plate, a first magnet and a second magnet are arranged on the opposite faces of the first portion and the second portion, the faces with the same magnetic poles of the first magnet and the second magnet are oppositely arranged, a through hole in the inner surface of the shell of the first hydraulic channel is located between the first portion and the second portion, and a first sealing ring and a second sealing ring are respectively arranged on the outer rings of the first portion and the second portion.
2. The two-speed reducer of claim 1, wherein: still include second planet reduction gears, second planet reduction gears includes second sun gear, second planet carrier and second ring gear, be provided with on the second planet carrier with the second sun gear with second ring gear engaged with second planetary gear, the second sun gear with first planet carrier links to each other, the second planet carrier links to each other with the output shaft, still includes second clutch, second clutch is responsible for the locking first ring gear.
3. A two-speed reducer as in claim 2 wherein: the second clutch device is a friction plate clutch.
4. A two-speed reducer as in claim 3 wherein: the second clutch device comprises a third friction plate and a fourth friction plate, the third friction plate is fixed on the first gear ring, and the fourth friction plate is connected with the outer shell.
5. The two-speed reducer of claim 4, wherein: the first friction plate and the second friction plate are provided with a plurality of plates, the first friction plate and the second friction plate are arranged at intervals, the third friction plate and the fourth friction plate are provided with a plurality of plates, and the third friction plate and the fourth friction plate are arranged at intervals.
6. The two-speed reducer of claim 5, wherein: second clutch still includes the second plunger, second plunger sliding connection is in on the shell inner wall, be provided with on the second plunger with the second plunger top to the second spring of third friction disc, be provided with the second hydraulic passage on the shell, when normal condition, under the effect of second spring, the second plunger is tight with third friction disc and fourth friction disc top, the second planet carrier locking is in on the shell, to after the second hydraulic passage sent into hydraulic oil, the second plunger left second clutch, the unblock of second planet carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020179088.9U CN212202998U (en) | 2020-02-18 | 2020-02-18 | Double-speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020179088.9U CN212202998U (en) | 2020-02-18 | 2020-02-18 | Double-speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212202998U true CN212202998U (en) | 2020-12-22 |
Family
ID=73819837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020179088.9U Expired - Fee Related CN212202998U (en) | 2020-02-18 | 2020-02-18 | Double-speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212202998U (en) |
-
2020
- 2020-02-18 CN CN202020179088.9U patent/CN212202998U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201222 Termination date: 20220218 |
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| CF01 | Termination of patent right due to non-payment of annual fee |