CN210371972U - Derailleur shift fork mechanism of shifting - Google Patents
Derailleur shift fork mechanism of shifting Download PDFInfo
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- CN210371972U CN210371972U CN201920944327.2U CN201920944327U CN210371972U CN 210371972 U CN210371972 U CN 210371972U CN 201920944327 U CN201920944327 U CN 201920944327U CN 210371972 U CN210371972 U CN 210371972U
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- shifting fork
- shifting
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- assembly
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Abstract
The utility model discloses a derailleur shift fork mechanism of shifting, including shift fork assembly and the synchronous ware assembly of shifting. The shifting fork assembly comprises a shifting fork shaft, a shifting fork connecting sleeve and a shifting fork, the shifting fork of the shifting fork assembly is fixedly connected to the shifting fork shaft through the shifting fork connecting sleeve, a web plate groove is formed in the end part of the shifting fork in a pulling mode along the length direction of the shifting fork, and a boss-shaped single web plate protrudes from the middle part of the side wall of the outer ring of a synchronizer gear sleeve of the synchronizer assembly; the single web plate of the synchronizer gear sleeve is clamped into the web plate slot of the shifting fork. The drum-shaped friction surface is arranged on the web groove, the drum-shaped height is the maximum value of the swing of the synchronizer gear sleeve during operation, the single web on the synchronizer gear sleeve is matched with the web groove on the shifting fork, the axial space under a specific shaft system is reduced, the functional problems that the gear-shifting stroke of the synchronizer gear sleeve is not in place due to the damage of the shifting fork, the gear-shifting of a transmission is caused are avoided, the manual shaking of the whole vehicle is reduced, and the gear-shifting quality of the transmission is improved.
Description
Technical Field
The utility model relates to a derailleur field, concretely relates to derailleur shift fork mechanism that shifts.
Background
A prior art transmission shift fork mechanism is shown in fig. 1-4. Derailleur shift fork mechanism includes: shift fork assembly 1 and synchronous ware assembly 2 shift. The gear shifting fork assembly 1 is provided with a fork shaft 12, a fork connecting sleeve 13 and a fork 14, the gear shifting fork assembly 1 is connected to a shaft hole of the transmission box body in a sliding mode through an upper end 122 of the fork shaft and a lower end 121 of the fork shaft on the fork shaft 12, the fork 14 is fixedly connected to the fork shaft 12 through the fork connecting sleeve 13, a plastic sleeve 0141 is arranged at the end part of the fork 14, and a gear sleeve groove 0211 is formed in the outer ring of a synchronizer gear sleeve 21 of the synchronizer assembly 2 in the circumferential direction. During gear shifting, the gear shifting fork assembly 1 moves to drive the shifting fork 14 to move, so that the plastic sleeve 0141 is in contact with the upper surface and the lower surface of a gear sleeve groove 0211 on a synchronizer gear sleeve 21 to push the synchronizer gear sleeve 21 to move and shift, the synchronizer gear sleeve 21 rotates at a high speed, and simultaneously, the upper surface and the lower surface of the gear sleeve groove 0211 are continuously knocked and unevenly extruded on the upper friction surface and the lower friction surface of the plastic sleeve 0141 along with the inevitable deflection of the synchronizer gear sleeve 21 around a central axis, and finally, the plastic sleeve 0141 is cracked, crushed, fallen and excessively worn, so that the gear shifting stroke of the synchronizer gear sleeve 21 is not in place, and the functional problems of gear beating, gear falling and the like of a transmission are caused.
Meanwhile, the gear sleeve groove 0211 on the synchronizer gear sleeve 21 is provided with an upper web plate and a lower web plate, so that the two web plates are interfered with a shaft system in a specific shaft system space to cause the incapability of installation, the synchronizer gear sleeve can be used only by prolonging the axial space, the integral weight of the transmission is increased, and the manufacturing cost of the transmission and the use oil consumption of the whole vehicle are increased.
Disclosure of Invention
The utility model aims at prior art not enough, provide a derailleur shift fork mechanism that shifts, its wearability, the shock resistance that can improve the shift fork of shifting, extension shift fork life avoids the transmission that reduces the shake simultaneously because of the functional problems such as tooth, derailment that the shift fork wearing and tearing lead to improves the quality of shifting of derailleur.
The utility model discloses a derailleur shift fork mechanism that shifts, including shift fork assembly and synchronous ware assembly, shift fork assembly contains shift fork axle, shift fork adapter sleeve and shift fork, shift fork of shift fork assembly passes through shift fork adapter sleeve fixed connection on shift fork axle, the tip of shift fork is passed through along shift fork length direction and is had the web groove;
a boss-shaped single web plate protrudes from the middle part of the side wall of the outer ring of the synchronizer gear sleeve of the synchronizer assembly;
and the single web plate of the synchronizer gear sleeve is clamped into the web plate slot of the shifting fork.
Furthermore, the end part of the web groove is a friction surface which is turned over towards the single web side, the notch of the friction surface section is narrowed in a drum shape, and the drum height is the maximum value of swing when the synchronizer gear sleeve operates.
Furthermore, the shifting fork assembly is used for being connected on the shaft hole of the transmission box body in a sliding mode through the upper end of a shifting fork shaft on the shifting fork shaft and the lower end of the shifting fork shaft.
Furthermore, the end of the shifting fork is formed by punching plates.
The utility model discloses beneficial technological effect does:
1) when the gear is shifted, the shifting fork assembly moves to drive the shifting fork to move, so that a drum-shaped friction surface on a web plate groove is in contact with the upper surface and the lower surface of a single web plate on a synchronizer gear sleeve to push the synchronizer gear sleeve to shift gears, the upper surface and the lower surface of the single web plate can continuously knock and unevenly extrude the drum-shaped friction surface along with inevitable deflection of the synchronizer gear sleeve around a central axis due to high-speed rotation of the synchronizer gear sleeve, and the drum-shaped height of the drum-shaped friction surface is the maximum value of swing when the synchronizer gear sleeve operates and can swing around the drum-shaped friction surface when the synchronizer gear sleeve operates, so that the gear sleeve is prevented from directly impacting the shifting fork due to swing, and the transmission of the shake is reduced. Meanwhile, the problems of cracking, crushing, falling, transitional abrasion and the like caused by the traditional plastic sleeve are solved, the functional problems of gear beating and gear disengaging of the transmission caused by the fact that the shifting stroke of the synchronizer gear sleeve is not in place due to damage of the shifting fork are avoided, and the gear shifting quality of the transmission is improved.
2) Because the gear sleeve is provided with the single web plate, the axial space can be saved, the weight of the transmission is reduced, and the oil consumption is reduced; when forging the preparation or the blank of powder metallurgy preparation tooth cover, compare two traditional web structures and form more easily, the blank material uses still less, and the product internal structure who forges is closely knit, and the performance is good.
3) The injection molding material has low utilization rate, pollutes the environment and has low part forming efficiency, and the web groove shifting fork structure with the drum-shaped friction surface adopts the plate punch forming and the local high-frequency heat treatment, thereby saving the injection molding process, having fast forming, high efficiency and low cost.
Drawings
FIG. 1 is a schematic view of a prior art transmission shift fork mechanism;
FIG. 2 is a schematic view of a prior art transmission shift fork assembly;
FIG. 3 is a schematic illustration of a prior art transmission synchronizer assembly;
FIG. 4 is a schematic view of a transmission shift fork mechanism of the present invention;
FIG. 5 is a schematic view of the shifting fork assembly of the present invention;
FIG. 6 is a schematic view of the web slot of the present invention;
fig. 7 is a schematic view of the synchronizer assembly according to the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 4 to 7, the utility model discloses a derailleur shift fork mechanism, including shift fork assembly 1 and synchronizer assembly 2 of shifting. The shifting fork assembly 1 comprises a shifting fork shaft 12, a shifting fork connecting sleeve 13 and a shifting fork 14, wherein the shifting fork 14 of the shifting fork assembly 1 is fixedly connected to the shifting fork shaft 12 through the shifting fork connecting sleeve 13, and a web groove 141 is formed in the end part of the shifting fork 14 in the length direction of the shifting fork 14.
A boss-shaped single web plate 211 protrudes from the middle of the side wall of the outer ring of the synchronizer gear sleeve 21 of the synchronizer assembly 2.
The end of the web groove 141 is a friction surface 1411 folded towards the single web 211, the groove opening of the section of the friction surface 1411 is narrowed in a drum shape, and the drum height 1412 is the maximum value of swing when the synchronizer tooth sleeve 21 operates.
The single web of synchronizer sleeve 21 snaps into the web slot 141 of shift fork 14.
The gear shifting fork assembly 1 is connected to a shaft hole of the transmission box body in a sliding mode through the upper end 15 of a fork shaft and the lower end 16 of the fork shaft on the fork shaft 12.
The end of the fork 14 is stamped and formed from sheet material.
During operation, gear shifting is carried out in a driving state, the shifting fork assembly 1 moves to drive the shifting fork 14 to move, so that the drum-shaped friction surface 1411 on the web groove 141 is in contact with the upper surface and the lower surface of the single web 211 on the synchronizer gear sleeve 21, and the synchronizer gear sleeve 21 is pushed to move and shift.
The synchronizer gear sleeve 21 rotates at a high speed, and simultaneously, the upper surface and the lower surface of the single web 211 can continuously knock and unevenly extrude the drum-shaped friction surface 1411 along with the inevitable deflection of the synchronizer gear sleeve 21 around the central axis, and the drum-shaped friction surface 1411 is arranged on the web groove 141, and the drum-shaped height 1412 of the drum-shaped friction surface 1411 is the maximum value of the swing of the synchronizer gear sleeve 21 during operation, so that the synchronizer gear sleeve 21 can swing around the drum-shaped friction surface 1411 during operation, the synchronizer gear sleeve 21 is prevented from swinging to directly impact the shifting fork 14, the transmission of the shake is reduced, the problems of cracking, crushing, falling, transitional wear and the like caused by the traditional plastic sleeve are solved, the functional problems of gear beating and gear falling of the transmission caused by the fact that the shifting stroke of the synchronizer gear sleeve is not in place due to the damage of the shifting fork are avoided, and the.
In addition, because the synchronizer gear sleeve 21 is provided with the single web 211, the axial space can be saved on a specific shafting system, the weight of the transmission is reduced, and the oil consumption is reduced. When forging the blank of preparation or powder metallurgy preparation tooth cover, compare two traditional web structures and form more easily, the blank material uses still less, and the product internal structure of forging out is more closely knit, and the performance is better.
The plastic sleeve injection molding material utilization ratio is low on traditional shift forks, pollutes the environment, and part shaping efficiency is low, and the web slot type shift fork structure with drum-shaped friction surface adopts panel stamping forming, and local high frequency heat treatment has saved injection molding process, and the shaping is fast, efficient, and is with low costs.
Claims (4)
1. The utility model provides a derailleur shift fork mechanism that shifts, is including shifting fork assembly (1) and synchronous ware assembly (2), shift fork assembly (1) contains declutch shift shaft (12), shift fork adapter sleeve (13) and shift fork (14), its characterized in that: a shifting fork (14) of the gear-shifting fork assembly (1) is fixedly connected to a shifting fork shaft (12) through a shifting fork connecting sleeve (13), and a web groove (141) is formed in the end part of the shifting fork (14) in a pull-through mode along the length direction of the shifting fork (14);
a boss-shaped single web plate (211) protrudes from the middle part of the side wall of the outer ring of the synchronizer gear sleeve (21) of the synchronizer assembly (2);
the single web of the synchronizer gear sleeve (21) is clamped into the web groove (141) of the shifting fork (14).
2. A transmission shift fork mechanism according to claim 1, wherein:
the end of the web groove (141) is a friction surface (1411) turned over to the single web (211), the groove opening of the section of the friction surface (1411) is narrowed in a drum shape, and the drum height (1412) is the maximum value of swing of the synchronizer gear sleeve (21) during operation.
3. A transmission shift fork mechanism according to claim 1 or claim 2, wherein:
the gear-shifting fork assembly (1) is connected to a shaft hole of the transmission box body in a sliding mode through the upper end (15) of a shifting fork shaft and the lower end (16) of the shifting fork shaft on the shifting fork shaft (12).
4. A transmission shift fork mechanism according to claim 3, wherein the end of the fork (14) is stamped from sheet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944327.2U CN210371972U (en) | 2019-06-21 | 2019-06-21 | Derailleur shift fork mechanism of shifting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944327.2U CN210371972U (en) | 2019-06-21 | 2019-06-21 | Derailleur shift fork mechanism of shifting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210371972U true CN210371972U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920944327.2U Active CN210371972U (en) | 2019-06-21 | 2019-06-21 | Derailleur shift fork mechanism of shifting |
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| Country | Link |
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| CN (1) | CN210371972U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159754A (en) * | 2019-06-21 | 2019-08-23 | 重庆青山工业有限责任公司 | A kind of transmission selector fork mechanism |
-
2019
- 2019-06-21 CN CN201920944327.2U patent/CN210371972U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159754A (en) * | 2019-06-21 | 2019-08-23 | 重庆青山工业有限责任公司 | A kind of transmission selector fork mechanism |
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