CN215890977U - Two keep off derailleur - Google Patents
Two keep off derailleur Download PDFInfo
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- CN215890977U CN215890977U CN202121514740.9U CN202121514740U CN215890977U CN 215890977 U CN215890977 U CN 215890977U CN 202121514740 U CN202121514740 U CN 202121514740U CN 215890977 U CN215890977 U CN 215890977U
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- shaft
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Abstract
The utility model discloses a two-gear transmission which comprises a shell, wherein an input shaft, a middle shaft, an output shaft and a shifting fork shaft are arranged in the shell, the middle shaft is connected with the input shaft through a middle shaft constant meshing gear, a shaft center hole is formed in the shaft center of the rear end shaft surface of the input shaft, the front end of the output shaft is coaxially connected to the shaft center hole through an output shaft front end bearing, a split type needle bearing is sleeved on the outer ring surface of the output shaft, an output shaft gear is sleeved on the split type needle bearing and meshed with the middle shaft, a gear hub and a sliding gear sleeve are sleeved at the front end of the output shaft gear, a shifting fork for shifting the sliding gear sleeve is arranged on the shifting fork shaft, a shifting rack is arranged in the length direction of the shifting fork shaft, and an external shifting mechanism is meshed with the shifting rack through a transmission gear. The two-gear transmission has the advantages of simpler structure, higher transmission efficiency, better power performance and lower after-sale maintenance cost.
Description
Technical Field
The utility model relates to the technical field of transmissions, in particular to a two-gear transmission.
Background
The hybrid electric vehicle speed changer transfers the power of the engine and the motor to the output shaft with proper torque and rotating speed through gear transmission and gear shifting of the speed change mechanism so as to meet the requirements of the vehicle on traction and running speed under different road conditions. Two keep off the derailleur and can reduce derailleur volume and weight under the prerequisite that covers commercial car operating mode, the two-stage gear drive structure of input shaft and output shaft coaxial arrangement can make its simple structure, and system efficiency is high, and is just lacking such two speed transmission at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a two-gear transmission which is simple in structure and reliable in performance.
In order to solve the problems, the utility model provides a two-gear transmission which comprises a shell, wherein an input shaft, a middle shaft, an output shaft and a shifting fork shaft are arranged in the shell, the middle shaft is connected with the input shaft through a middle shaft normally-meshed gear, a shaft center hole is formed in the shaft center of the rear end shaft surface of the input shaft, the front end of the output shaft is coaxially connected with the shaft center hole through a bearing at the front end of the output shaft, a split type needle bearing is sleeved on the outer ring surface of the output shaft, an output shaft gear is sleeved on the split type needle bearing and meshed with the middle shaft, a gear hub and a sliding gear sleeve are sleeved at the front end of the output shaft gear, a shifting fork for shifting the sliding gear sleeve is arranged on the shifting fork shaft, a shifting rack is arranged in the length direction of the shifting fork shaft, and an external shifting mechanism is meshed with the shifting rack through a transmission gear;
in the first gear, the driving motor drives the input shaft to rotate, the input shaft drives the sliding gear sleeve, the sliding gear sleeve drives the gear hub, and the gear hub drives the output shaft to rotate;
when the second gear is shifted, the driving motor drives the input shaft to rotate, the input shaft drives the intermediate shaft normally-meshed gear, the intermediate shaft normally-meshed gear drives the intermediate shaft to rotate, the intermediate shaft drives the output shaft gear, the output shaft gear drives the sliding gear sleeve, the sliding gear sleeve drives the gear hub, and the gear hub drives the output shaft to rotate.
As a further improvement of the utility model, one side of the declutch shift shaft is provided with an inward concave lock position hole, the shell is provided with a declutch shift shaft guide hole, one side of the declutch shift shaft guide hole is provided with a lock position guide hole, a lock ball spring with a steel ball is placed in the lock position guide hole, the outer end of the lock ball spring is packaged through a lock hole bolt, and the steel ball is positioned in the inward concave lock position hole in a lock position state.
As a further improvement of the utility model, the front end and the rear end of the intermediate shaft are respectively connected with the positioning holes on the shell through an intermediate shaft front bearing and an intermediate shaft rear bearing.
As a further improvement of the utility model, the input shaft is connected with the front end wall of the shell through an input shaft bearing, and the outer ring of the input shaft bearing is fixed on the shell through a front bearing pressing plate and a front bearing pressing plate bolt by a front bearing pressing plate.
As a further improvement of the utility model, a front oil seal is sleeved at the front end position of the input shaft corresponding to the input shaft bearing, and the outer ring of the front oil seal is arranged in a manner of clinging to the inner wall of the shell.
As a further improvement of the utility model, the output shaft is connected with the rear end wall of the shell through an output shaft rear end bearing, and the output shaft rear end bearing outer ring is fixed on the shell through a rear bearing pressing plate and a rear bearing pressing plate bolt by a rear bearing pressing plate.
As a further improvement of the utility model, a rear oil seal is sleeved at the rear end position of the output shaft corresponding to the rear end bearing of the output shaft, and the outer ring of the rear oil seal is arranged in a manner of clinging to the inner wall of the shell.
As a further improvement of the present invention, the housing includes a front housing and a rear housing, and the connection surfaces of the front housing and the rear housing are connected by a box-closing bolt.
As a further improvement of the utility model, the front end of the input shaft extends out of the shell and is connected with the driving motor, and the tail end of the output shaft extends out of the shell and is connected with the generator.
As a further improvement of the utility model, the countershaft constant mesh gear is in interference fit with the countershaft.
The utility model has the beneficial effects that:
the two-gear transmission can realize two gears, adopts a coaxial arrangement structure of the input shaft and the output shaft, reduces the volume of the whole transmission, and can realize gear engagement without speed difference or with small speed difference by controlling the rotating speed of the driving motor and adjusting the speed difference of the sliding gear sleeve to be engaged with the gears. The two-gear transmission has the advantages of simpler structure, higher transmission efficiency, better power performance and lower after-sale maintenance cost.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic representation of a two speed transmission in accordance with a preferred embodiment of the present invention.
Description of the labeling: 1. a rear housing; 2. a front housing; 3. a box assembling bolt; 4. a fork shaft; 5. a shift fork shaft bushing; 6. a front bearing press plate bolt; 7. a front bearing press plate; 8. an input shaft bearing; 9. a front oil seal; 10. an input shaft; 11. an input shaft snap ring; 12. an output shaft head snap ring; 13. an output shaft front end bearing; 14. a countershaft constant mesh gear; 15. a constant mesh gear snap ring; 16. an intermediate shaft; 17. a front bearing snap ring of the intermediate shaft; 18. a front bearing of the intermediate shaft; 20. a rear bearing of the intermediate shaft; 21. a rear bearing press plate bolt; 22. a rear bearing press plate; 23. an output shaft rear end bearing; 24. a rear oil seal; 25. an output shaft; 26. an output bearing snap ring; 27. an output bearing stop collar; 28. a split needle bearing; 29. an output shaft gear; 30. a gear hub snap ring; 31. a steel ball; 32. a gear shift rack; 33. a ball-locking spring; 34. a shifting fork fixing screw; 35. a shifting fork; 36. a sliding gear sleeve; 37. a gear hub.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
As shown in fig. 1, the two-speed transmission in the preferred embodiment of the present invention comprises a housing, an input shaft 10, an intermediate shaft 16, an output shaft 25, a shift fork shaft 4 are arranged in the housing, the intermediate shaft 16 is connected with the input shaft 10 through an intermediate shaft constant mesh gear 14, the shaft center of the rear end shaft surface of the input shaft 10 is provided with a shaft center hole, the front end of the output shaft 25 is coaxially connected to the shaft center hole through an output shaft front end bearing 13, the outer ring surface of the output shaft 25 is sleeved with a split needle bearing 28, the split needle bearing 28 is sleeved with an output shaft gear 29, the output shaft gear 29 is meshed with the intermediate shaft 16, the front end of the output shaft gear 29 is sleeved with a gear hub 37 and a sliding gear sleeve 36, the shifting fork shaft 4 is provided with a shifting fork 35 for shifting the sliding gear sleeve 36, a shifting rack 32 is arranged in the length direction of the shifting fork shaft 4, and an external shifting mechanism is meshed with the shifting rack 32 through a transmission gear. Alternatively, the shift fork 35 is connected to the shift fork shaft 4 by a shift fork fixing screw 34.
The front end of the input shaft 10 extends out of the shell and is connected with a driving motor, and the tail end of the output shaft 25 extends out of the shell and is connected with a generator.
Optionally, the intermediate shaft constant mesh gear 14 is in interference fit with the intermediate shaft 16; still the cover is equipped with fork shaft bush 5 on the declutch shift 4, reduces coefficient of friction, reduces the damping of shifting, increases the wearability.
Optionally, the input shaft 10 and the output shaft 25 are respectively provided with an input shaft snap ring 11 and an output shaft head snap ring 12; a constant mesh gear snap ring 15 is assembled on the intermediate shaft constant mesh gear 14; an intermediate shaft front bearing snap ring 17 is assembled on the intermediate shaft 16; an output bearing snap ring 26 and an output bearing limit sleeve 27 are assembled on the output shaft 25; the gear hub 37 is fitted with a gear hub snap ring 30.
In the first gear, the driving motor drives the input shaft 10 to rotate, the input shaft 10 drives the sliding gear sleeve 36, the sliding gear sleeve 36 drives the gear hub 37, and the gear hub 37 drives the output shaft 25 to rotate.
In the second gear, the driving motor drives the input shaft 10 to rotate, the input shaft 10 drives the intermediate shaft normally meshed gear 14, the intermediate shaft normally meshed gear 14 drives the intermediate shaft 16 to rotate, the intermediate shaft 16 drives the output shaft gear 29, the output shaft gear 29 drives the sliding gear sleeve 36, the sliding gear sleeve 36 drives the gear hub 37, and the gear hub 37 drives the output shaft 25 to rotate.
In some embodiments, one side of the fork shaft 4 is provided with an inward concave locking hole, the housing is provided with a fork shaft guide hole, one side of the fork shaft guide hole is provided with a locking guide hole, a ball locking spring 33 with a steel ball 31 is placed in the locking guide hole, the outer end of the ball locking spring 33 is packaged through a lock hole bolt, and the steel ball 31 is located in the inward concave locking hole in a locking state, so that the reliable position of the neutral gear is ensured.
In this embodiment, the front and rear ends of the intermediate shaft 16 are coupled to the housing alignment holes by intermediate shaft front and rear bearings 18 and 20, respectively.
Optionally, the input shaft 10 is connected to the front end wall of the housing through an input shaft bearing 8, and an outer ring of the input shaft bearing 8 is fixed to the housing through a front bearing pressing plate 7 and a front bearing pressing plate bolt 6. Further, a front oil seal 9 is sleeved on the input shaft 10 corresponding to the front end of the input shaft bearing 8, and the outer ring of the front oil seal 9 is tightly attached to the inner wall of the shell.
Optionally, the output shaft 25 is connected to the rear end wall of the housing through an output shaft rear end bearing 23, and an outer ring of the output shaft rear end bearing 23 is fixed to the housing through a rear bearing pressing plate 22 and a rear bearing pressing plate bolt 21. Further, a rear oil seal 24 is sleeved on the output shaft 25 corresponding to the rear end position of the output shaft rear end bearing 23, and the outer ring of the rear oil seal 24 is tightly attached to the inner wall of the shell.
In some embodiments, the casing comprises a front casing 2 and a rear casing 1, and the connection surfaces of the front casing 2 and the rear casing 1 are connected through box closing bolts 3, so that the disassembly and assembly are convenient.
The two-gear transmission can realize two gears, adopts a coaxial arrangement structure of the input shaft and the output shaft, reduces the volume of the whole transmission, and can realize gear engagement without speed difference or with small speed difference by controlling the rotating speed of the driving motor and adjusting the speed difference of the sliding gear sleeve to be engaged with the gears. The two-gear transmission has the advantages of simpler structure, higher transmission efficiency, better power performance and lower after-sale maintenance cost.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the utility model is all within the protection scope of the utility model. The protection scope of the utility model is subject to the claims.
Claims (10)
1. A two-gear transmission is characterized by comprising a shell, wherein an input shaft, a middle shaft, an output shaft and a shifting fork shaft are arranged in the shell, the middle shaft is connected with the input shaft through a middle shaft normally meshed gear, a shaft center hole is formed in the shaft center of the rear end shaft surface of the input shaft, the front end of the output shaft is coaxially connected to the shaft center hole through an output shaft front end bearing, a split type needle bearing is sleeved on the outer ring surface of the output shaft, an output shaft gear is sleeved on the split type needle bearing and meshed with the middle shaft, a gear hub and a sliding gear sleeve are sleeved at the front end of the output shaft gear, a shifting fork for shifting the sliding gear sleeve is arranged on the shifting fork shaft, a shifting rack is arranged in the length direction of the shifting fork shaft, and an external shifting mechanism is meshed with the shifting rack through a transmission gear;
in the first gear, the driving motor drives the input shaft to rotate, the input shaft drives the sliding gear sleeve, the sliding gear sleeve drives the gear hub, and the gear hub drives the output shaft to rotate;
when the second gear is shifted, the driving motor drives the input shaft to rotate, the input shaft drives the intermediate shaft normally-meshed gear, the intermediate shaft normally-meshed gear drives the intermediate shaft to rotate, the intermediate shaft drives the output shaft gear, the output shaft gear drives the sliding gear sleeve, the sliding gear sleeve drives the gear hub, and the gear hub drives the output shaft to rotate.
2. The two speed transmission according to claim 1, wherein one side of the shift fork shaft is provided with an inward concave lock hole, the housing is provided with a shift fork shaft guide hole, one side of the shift fork shaft guide hole is provided with a lock hole, a lock ball spring with a steel ball is placed in the lock hole guide hole, the outer end of the lock ball spring is packaged by a lock hole bolt, and the steel ball is placed in the inward concave lock hole in the lock state.
3. The two speed transmission of claim 1, wherein the front and rear ends of said countershaft are connected to alignment holes in said housing by a countershaft front bearing and a countershaft rear bearing, respectively.
4. The two speed transmission of claim 1, wherein said input shaft is connected to said front end wall of said housing by an input shaft bearing, said input shaft bearing cup being bolted to said housing by a front bearing retainer through a front bearing retainer bolt.
5. The two speed transmission of claim 4, wherein the input shaft is sleeved with a front oil seal corresponding to the front end position of the input shaft bearing, and the outer ring of the front oil seal is arranged to be closely attached to the inner wall of the housing.
6. The two speed transmission of claim 1, wherein the output shaft is connected to the rear end wall of the housing by an output shaft rear end bearing, the output shaft rear end bearing outer race being bolted to the housing by a rear bearing retainer through a rear bearing retainer bolt.
7. The two speed transmission of claim 6, wherein the output shaft is sleeved with a rear oil seal at a position corresponding to a rear end of the output shaft rear end bearing, and an outer ring of the rear oil seal is arranged to be closely attached to an inner wall of the housing.
8. The two speed transmission of claim 1, wherein said housing comprises a front housing and a rear housing, said front and rear housing connection faces being connected by a box closing bolt.
9. The two speed transmission of claim 1, wherein the input shaft extends from the front end of the input shaft to the outside of the housing for connection to a drive motor and the output shaft extends from the rear end of the input shaft to the outside of the housing for connection to a generator.
10. The two speed transmission of claim 1, wherein said countershaft normally meshed gear is an interference fit with said countershaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121514740.9U CN215890977U (en) | 2021-07-05 | 2021-07-05 | Two keep off derailleur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121514740.9U CN215890977U (en) | 2021-07-05 | 2021-07-05 | Two keep off derailleur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890977U true CN215890977U (en) | 2022-02-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121514740.9U Active CN215890977U (en) | 2021-07-05 | 2021-07-05 | Two keep off derailleur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117489776A (en) * | 2023-09-28 | 2024-02-02 | 江苏悦达智能农业装备有限公司 | Power output operating device |
-
2021
- 2021-07-05 CN CN202121514740.9U patent/CN215890977U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117489776A (en) * | 2023-09-28 | 2024-02-02 | 江苏悦达智能农业装备有限公司 | Power output operating device |
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