CN107191592B - Gear shifting drum gear shifting type speed changer assembly - Google Patents
Gear shifting drum gear shifting type speed changer assembly Download PDFInfo
- Publication number
- CN107191592B CN107191592B CN201710408642.9A CN201710408642A CN107191592B CN 107191592 B CN107191592 B CN 107191592B CN 201710408642 A CN201710408642 A CN 201710408642A CN 107191592 B CN107191592 B CN 107191592B
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- gear
- shifting
- gear shifting
- drum
- output shaft
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- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
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- 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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/085—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts with more than one output shaft
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a gear shifting drum gear shifting type speed changer assembly, which comprises a speed changer and a gear shifting drum gear shifting mechanism; the transmission is provided with a plurality of gear shifting joint pieces and shifts gears by the gear shifting joint pieces moving back and forth along the axis; the gear shifting drum shifting mechanism comprises a gear shifting drum and a plurality of shifting forks which are matched with the gear shifting joint pieces in a one-to-one correspondence manner; one molded line groove of the outer circle of the speed change drum drives a plurality of shifting forks to reciprocate axially to shift gears, and one molded line groove of the speed change drum in the speed change assembly can control a plurality of shifting forks to act simultaneously, so that the structure of the speed change drum is simplified, and the manufacturing cost of the speed change drum is reduced.
Description
Technical Field
The invention relates to the field of speed changers, in particular to a shift drum gear shifting type speed changer assembly.
Background
The transmission is an important component of an automotive transmission system for varying rotational speed and torque from an engine and requires a gear shifting mechanism to achieve a gear shifting effect that controls the transmission to achieve a predetermined operating effect. The gear shifting mechanism of the existing speed changer usually utilizes a shifting fork to drive a synchronizer or a joint sleeve of the speed changer to reciprocate to shift gears, and in small motor vehicles such as motorcycles and tricycles, the shifting fork is usually driven to move by utilizing a speed changing drum, molded line grooves corresponding to the shifting fork one by one are formed in the outer circle of the speed changing drum, and each molded line groove controls one shifting fork to act, so that a plurality of molded line grooves are required to be machined in the outer circle of the existing speed changing drum, and the molded line grooves are difficult to machine and high in cost.
Therefore, in order to solve the above problems, there is a need for a shift drum shift type transmission assembly in which one molded line groove of a shift drum can simultaneously control a plurality of shift fork actions, thereby simplifying the structure of the shift drum and reducing the manufacturing cost of the shift drum.
Disclosure of Invention
Accordingly, the present invention is directed to a shift drum shift type transmission assembly, which can control a plurality of shifting fork actions simultaneously by one molded line groove of a shift drum in the assembly, thereby simplifying the structure of the shift drum and reducing the manufacturing cost of the shift drum.
The invention relates to a gear shifting drum gear shifting type speed changer assembly, which comprises a speed changer and a gear shifting drum gear shifting mechanism; the transmission is provided with a plurality of gear shifting joint pieces and shifts gears by the gear shifting joint pieces moving back and forth along the axis; the gear shifting drum shifting mechanism comprises a gear shifting drum and a plurality of shifting forks which are matched with the gear shifting joint pieces in a one-to-one correspondence manner; and one molded line groove of the outer circle of the speed change drum simultaneously drives a plurality of shifting forks to axially reciprocate for gear shifting.
Further, the shift drum shifting mechanism further comprises shifting fork shafts which are fixed in one-to-one correspondence with the shifting forks and driving pins arranged on the shifting fork shafts; the driving pin of each shifting fork shaft is in sliding fit with the wire forming groove.
Further, the transmission includes a transmission input shaft, a first output shaft, and a second output shaft; and power is transmitted between the transmission input shaft and the first output shaft and between the transmission input shaft and the second output shaft through a plurality of groups of gear shifting pairs, and the gear shifting joint piece is arranged between the adjacent gear shifting pairs.
The gear shifting drum gear shifting type transmission assembly also comprises a multifunctional transmission assembly, wherein the multifunctional transmission assembly comprises a power input shaft, a first overrunning clutch and a second overrunning clutch; the first overrunning clutch and the second overrunning clutch are opposite in overrunning direction, the inner ring of the first overrunning clutch and the inner ring of the second overrunning clutch are in transmission fit with the power input shaft, the outer ring of the first overrunning clutch and the outer ring of the second overrunning clutch are correspondingly in transmission fit with a first gear and a second gear, the first output shaft can be in rotary fit with a first duplex gear which is correspondingly meshed with the first gear and the second gear to enable the rotation speed of the first gear to be faster than that of the second gear through reduction transmission, and the first duplex gear is in transmission connection with the transmission input shaft.
Further, the gear shifting gear pairs are six groups and are respectively a first gear pair, a second gear pair, a third gear pair and a fourth gear pair for transmitting power between the transmission input shaft and the second output shaft, and a fifth gear pair and a sixth gear pair for transmitting power between the transmission input shaft and the first output shaft; the number of the gear shifting joint pieces is four, and the gear shifting joint pieces are respectively a first gear shifting joint piece and a second gear shifting joint piece which are arranged on the first output shaft, and a third gear shifting joint piece and a fourth gear shifting joint piece which are arranged on the second output shaft; the speed change drum is arranged between the first output shaft and the second output shaft in parallel, and simultaneously controls the first gear shifting joint piece, the second gear shifting joint piece, the third joint piece and the fourth joint piece to slide back and forth along the axial direction through the molded line groove.
Further, the first double gear can be controlled to be engaged with the first output shaft through the first gear shifting engagement piece to form a seventh gear.
Further, the gear shifting gear pair comprises a driving gear in driving fit with the transmission input shaft and a driven gear in rotating fit with the first output shaft or the second output shaft, and the four-gear pair and the five-gear pair share one driving gear.
Further, the transmission further comprises a reverse gear idler gear which forms a second duplex gear together with the driven gear of the second gear pair, and a reverse gear which is in rotary fit on the first output shaft and meshed with the reverse gear idler gear.
Further, ten gear shifting positions are formed by uniformly separating the gear shifting drum along the circumferential direction, and the gear shifting positions are a reverse gear position, a first neutral gear position, a second neutral gear position, a first gear position, a second gear position, a third gear position, a fourth gear position, a fifth gear position, a sixth gear position and a seventh gear position respectively.
The beneficial effects of the invention are as follows: according to the gear shifting drum gear shifting type transmission assembly, one molded line groove on the outer circle of the gear shifting drum simultaneously drives a plurality of shifting forks to reciprocate along the axial direction for gear shifting, so that the number of molded line grooves of the gear shifting drum can be reduced, the structure of the gear shifting drum is simplified, the gear shifting drum can be arranged in a transmission with smaller size, and finally the compactness of the transmission assembly and the manufacturing cost of the transmission are improved.
Drawings
The invention is further described below with reference to the accompanying drawings and examples:
FIG. 1 is an exploded view of a wire rope groove of a shift drum of the present invention;
fig. 2 is a schematic view of respective shift positions of the shift drum of the present invention;
fig. 3 is a schematic diagram of a transmission of the present invention.
Detailed Description
Fig. 1 is a schematic view of the structure of the present invention, as shown in the drawing, a shift drum 23 shift type transmission assembly of the present embodiment, including a transmission and a shift drum 23 shift mechanism; the transmission is provided with a plurality of shift engagement pieces (synchronizers or engagement sleeves) and shifts gears by the shift engagement pieces moving reciprocally along an axis; the gear shifting mechanism of the gear shifting drum 23 comprises the gear shifting drum 23 and a plurality of shifting forks which are matched with the gear shifting joint parts in a one-to-one correspondence manner; one molded line groove 24 on the outer circle of the speed change drum 23 simultaneously drives a plurality of shifting forks to axially reciprocate for gear shifting; in the shift drum 23 gear shifting type transmission assembly of the embodiment, one molded line groove 24 on the outer circle of the shift drum 23 simultaneously drives a plurality of shifting forks to reciprocate along the axial direction for gear shifting, so that the number of molded line grooves 24 of the shift drum 23 can be reduced, the structure of the shift drum 23 is simplified, the shift drum 23 can be arranged in a transmission with smaller volume, and finally the compactness of the transmission assembly and the manufacturing cost of the transmission are improved.
In this embodiment, the shift drum 23 shift mechanism further includes a shift rail fixed in one-to-one correspondence with the shift forks and a driving pin disposed on the shift rail; in this embodiment, four groups of shift forks, shift fork shafts and drive pins are arranged in a one-to-one correspondence manner, and the four drive pins are in sliding fit in one molded line groove 24 of the shift drum 23, and the four shift fork shafts are simultaneously driven to shift gears along the axial action by the rotation of the shift drum 23.
In this embodiment, the transmission includes a transmission input shaft 13, a first output shaft 20, and a second output shaft 12; the transmission input shaft 13 and the first output shaft 20 and the transmission input shaft 13 and the second output shaft 12 are respectively transmitted with power through a plurality of groups of gear shifting pairs, and the gear shifting joint piece is arranged between the adjacent gear shifting pairs; the gear shifting pairs on both sides of the gear shifting joint member can be selected for transmission by axially reciprocating sliding the gear shifting joint member, and the first output shaft 20 and the second output shaft 12 can output power through the power output gear 8.
The shift drum 23 shifting type transmission assembly of the present embodiment further includes a multifunctional transmission assembly including a power input shaft 1, a first overrunning clutch and a second overrunning clutch 22; the first overrunning clutch 21 and the second overrunning clutch 22 have opposite overrunning directions, the inner ring of the first overrunning clutch 21 and the inner ring of the second overrunning clutch 22 are in transmission fit with the power input shaft 1, the outer ring of the first overrunning clutch 21 and the outer ring of the second overrunning clutch 22 are correspondingly in transmission fit with the first gear 3 and the second gear 2, the first output shaft 20 can be in rotational fit with the first duplex gear 19 which is correspondingly meshed with the first gear 3 and the second gear 2 to enable the first gear 3 and the second gear 2 to perform speed reduction transmission so that the rotating speed of the first gear 3 is faster than the rotating speed of the second gear 2, and the first gear 3 is in transmission connection with the transmission input shaft 13; the power input shaft 1 of the multifunctional transmission assembly is used for receiving power input of an engine, when a vehicle runs normally, the engine drives the power input shaft 1 to rotate positively, at the moment, the first overrunning clutch 21 is in an engaged state, the outer ring of the first overrunning clutch outputs power of the power input shaft 1 to the input end of the transmission outwards, and as the first gear 3 and the second gear 2 perform speed reduction transmission, the second gear 2 also rotates positively, the rotating speed of the second overrunning clutch is lower than that of the power input shaft 1, and therefore the second overrunning clutch 22 is in an overrunning state; when the vehicle needs to be shifted, the driver releases the accelerator, the rotating speed of the power input shaft 1 is lower than the rotating speed of the first gear 3 and higher than the rotating speed of the second gear 2, at the moment, the first overrunning clutch 21 and the second overrunning clutch 22 are both in a separated state, which is equivalent to cutting off the power transmission between the engine and the transmission, and the driver can finish the shifting without operating the clutches; when a driver descends a slope and releases an accelerator, the wheels reversely drag the outer ring of the first overrunning clutch 21 through the transmission system, so that the rotating speed of the outer ring is greatly higher than that of the power input shaft 1, at the moment, the first overrunning clutch is in an overrunning state, the second overrunning clutch 22 is in an engaged state, and the second gear 2 rotates the reversely-dragged power input shaft 1, so that the engine braking effect is realized; when the vehicle starts on a steep slope or the steep slope is parked and a backward slip trend is generated, the first gear 3 is reversely dragged to generate a reverse rotation trend, at the moment, the first overrunning clutch 21 and the second overrunning clutch 22 are both in an engaged state and generate a reverse rotation trend, and the whole transmission assembly is locked due to the fact that the first gear 3 and the second gear 2 are subjected to speed reduction transmission, so that the reverse rotation of a power output wheel is avoided, and the backward slip prevention function of the vehicle is realized.
In the present embodiment of the present invention, the gear shifting gear pairs are six groups and are respectively a first gear pair 10, a second gear pair 11, a third gear pair 4 and a fourth gear pair 6 for transmitting power between the transmission input shaft 13 and the second output shaft 12, and a fifth gear pair 17 and a sixth gear pair 16 for transmitting power between the transmission input shaft 13 and the first output shaft 20; the number of the gear shifting engagement pieces is four, and the gear shifting engagement pieces are respectively a first gear shifting engagement piece 18 and a second gear shifting engagement piece 15 which are arranged on the first output shaft 20, and a third gear shifting engagement piece 5 and a fourth gear shifting engagement piece 7 which are arranged on the second output shaft 12; the shift drum 23 is disposed in parallel between the first output shaft 20 and the second output shaft 12 and simultaneously controls the first driving pin 25, the second driving pin 26, the third driving pin 27 and the fourth driving pin 28, which are in one-to-one correspondence with the first shift joint 18, the second shift joint 15, the third joint and the fourth joint, to reciprocate in the shift fork axial direction through the molded line groove 24.
In this embodiment, the first duplex gear 19 may be controlled by the first shift engaging member 18 to engage with the first output shaft 20 to form a seventh gear, when the first duplex gear 19 engages with the first output shaft 20, the power of the power input shaft 1 is transmitted to the first output shaft 20 through the first gear 3 and the first duplex gear 19, so as to form a seventh forward gear of the transmission, and at this time, all the other six shift gear pairs are in a separated state.
In this embodiment, the gear shifting gear pair includes a driving gear in driving engagement with the transmission input shaft 13 and a driven gear in rotating engagement with the first output shaft 20 or the second output shaft 12, and the four-speed gear pair 6 and the five-speed gear pair share one driving gear, in this embodiment, five driving gears in driving engagement with the transmission input shaft 13, the driven gears of the first gear to fourth gear pair 6 are in running fit with the second output shaft 12, the driven gears of the fifth gear and sixth gear pairs 16 are in running fit with the first output shaft 20, wherein the fourth gear pair 6 and the fifth gear pair share a driving gear which is meshed with the driven gears of the fourth gear pair 6 and the fifth gear pair at the same time, and the arrangement mode can reduce the number of gears and improve the overall compactness of the transmission.
In this embodiment, the transmission further includes a reverse idler gear that forms a second duplex gear together with the driven gear of the second gear pair 11, and a reverse gear 14 that is rotationally engaged with the reverse idler gear on the first output shaft 20; the reverse gear 14 is engaged with the first output shaft 20 by a shift engagement member to achieve reverse gear.
In this embodiment, the shift drum 23 is evenly spaced along the circumferential direction to form ten shift positions, and each 36 ° of shift positions is a reverse gear position, a first neutral gear position, a second neutral gear position, a first gear position, a second gear position, a third gear position, a fourth gear position, a fifth gear position, a sixth gear position and a seventh gear position, so that the transmission can shift from first gear to seventh gear sequentially through rotation of the shift drum 23, and in addition, two neutral gear positions are provided between the reverse gear and the first gear, so that misoperation can be avoided.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (5)
1. A shift drum shift type transmission assembly, characterized in that: comprises a speed changer and a speed change drum shifting mechanism; the transmission is provided with a plurality of gear shifting joint pieces and shifts gears by the gear shifting joint pieces moving back and forth along the axis; the gear shifting drum shifting mechanism comprises a gear shifting drum and a plurality of shifting forks which are matched with the gear shifting joint pieces in a one-to-one correspondence manner; one molded line groove of the outer circle of the variable speed drum simultaneously drives a plurality of shifting forks to axially reciprocate for gear shifting; the gear shifting drum shifting mechanism further comprises shifting fork shafts which are fixed in one-to-one correspondence with the shifting forks, and driving pins arranged on the shifting fork shafts; the driving pin of each shifting fork shaft is in sliding fit with the wire forming groove; the transmission comprises a transmission input shaft, a first output shaft and a second output shaft; the transmission input shaft and the first output shaft and the transmission input shaft and the second output shaft are respectively transmitted with power through a plurality of groups of gear shifting pairs, and the gear shifting joint piece is arranged between the adjacent gear shifting pairs;
the multifunctional transmission assembly comprises a power input shaft, a first overrunning clutch and a second overrunning clutch; the first output shaft is rotatably matched with a first duplex gear which is correspondingly meshed with the first gear and the second gear to enable the rotation speed of the first gear to be faster than that of the second gear through speed reduction transmission between the first gear and the second gear, and the first gear is connected with the transmission input shaft;
the gear shifting drum is evenly divided into ten gear shifting positions along the circumferential direction, and the gear shifting positions are a reverse gear position, a first neutral gear position, a second neutral gear position, a first gear position, a second gear position, a third gear position, a fourth gear position, a fifth gear position, a sixth gear position and a seventh gear position respectively.
2. The shift drum shift type transmission assembly according to claim 1, wherein: the gear shifting gear pairs are six groups and are respectively a first gear pair, a second gear pair, a third gear pair and a fourth gear pair for transmitting power between the transmission input shaft and the second output shaft, and a fifth gear pair and a sixth gear pair for transmitting power between the transmission input shaft and the first output shaft; the gear shifting joint pieces are four, and are respectively a first gear shifting joint piece and a second gear shifting joint piece which are arranged on the first output shaft, and a third gear shifting joint piece and a fourth gear shifting joint piece which are arranged on the second output shaft; the speed change drum is arranged between the first output shaft and the second output shaft in parallel, and simultaneously controls the first gear shifting joint piece, the second gear shifting joint piece, the third joint piece and the fourth joint piece to slide back and forth along the axial direction through the molded line groove.
3. The shift drum shift type transmission assembly according to claim 2, wherein: the first duplex gear can be controlled to be engaged with the first output shaft through the first gear shifting engagement piece to form a seventh gear.
4. A shift drum shift type transmission assembly as claimed in claim 3, wherein: the gear shifting gear pair comprises a driving gear which is in transmission fit with the transmission input shaft and a driven gear which is in rotation fit with the first output shaft or the second output shaft, and the four-gear pair and the five-gear pair share one driving gear.
5. The shift drum shift type transmission assembly as claimed in claim 4, wherein: the transmission further comprises a reverse gear idler gear which forms a second duplex gear together with the driven gear of the second gear pair, and a reverse gear which is in rotary fit on the first output shaft and meshed with the reverse gear idler gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710408642.9A CN107191592B (en) | 2017-06-02 | 2017-06-02 | Gear shifting drum gear shifting type speed changer assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710408642.9A CN107191592B (en) | 2017-06-02 | 2017-06-02 | Gear shifting drum gear shifting type speed changer assembly |
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| Publication Number | Publication Date |
|---|---|
| CN107191592A CN107191592A (en) | 2017-09-22 |
| CN107191592B true CN107191592B (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710408642.9A Active CN107191592B (en) | 2017-06-02 | 2017-06-02 | Gear shifting drum gear shifting type speed changer assembly |
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| CN (1) | CN107191592B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533698B (en) * | 2018-03-13 | 2020-04-24 | 浙江鑫可精密机械有限公司 | Gear shifting assembly of transmission, transmission and automobile |
| CN113187893B (en) * | 2021-04-23 | 2023-01-24 | 重庆隆鑫通航发动机制造有限公司 | Speed change mechanism and gearbox |
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| EP2995488B1 (en) * | 2014-09-10 | 2018-12-26 | BYD Company Limited | Power transmission system and vehicle comprising the same |
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