CN201672050U - Gear shifting fork of speed-changing box - Google Patents
Gear shifting fork of speed-changing box Download PDFInfo
- Publication number
- CN201672050U CN201672050U CN2010201704362U CN201020170436U CN201672050U CN 201672050 U CN201672050 U CN 201672050U CN 2010201704362 U CN2010201704362 U CN 2010201704362U CN 201020170436 U CN201020170436 U CN 201020170436U CN 201672050 U CN201672050 U CN 201672050U
- Authority
- CN
- China
- Prior art keywords
- shifting fork
- gear
- rods
- shift
- short straight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The utility model discloses a gear shifting fork of a speed-changing box, comprising a shifting fork body, and shifting fork rods extending from two sides of the shifting fork body, wherein the upper end of the shifting fork body is provided with a shifting fork shaft hole; the shifting fork rods are symmetrical semicircular structures; two ends of the shifting fork rods are respectively extended with short straight rods outwards from the semicircle; and the ratio of the length a of each short straight rod to the semicircular diameter Phi of each shifting fork rod is 0.2-0.3. The gear shifting fork is simple in structure, the shifting fork rods adopt symmetrical semicircular structures; two sides of the shifting fork rods are respectively extended with the short straight rods; the ratio of the length a of each short straight rod to the semicircular diameter Phi of each shifting fork rod is increased to be 0.2-0.4 from the 0.08-0.10 of the gear shifting fork of the existing speed-changing box, so that the contact area of the gear shifting fork and a ring-shaped groove of the gear-shifting gear is increased; and the shifting fork can not be turned so as to ensure the smooth gear shifting of the speed-changing box of a harvester, and further enhance the reliability and stability of the gear shifting fork.
Description
Technical field
The utility model relates to a kind of gearshift mechanism of running mechanism gearbox, and especially a kind of reverse shift fork of reaper gearbox belongs to the mechanical transmissioning technology field.
Background technique
Reverse shift fork is the vital part in the running mechanism gearbox, it is by receiving the power that gear shifting handle transmits, and the gear that promotes in the gearbox moves on declutch shift shaft, throws off the meshing relation of original gear pair, set up new gear pair meshing relation, on required transmission speed ratio gear, move.Reverse shift fork in the existing reaper gearbox as shown in Figure 1, comprise shift fork body 1 and from the extended shifting fork bar 2 in shift fork body 1 both sides, reverse shift fork is sleeved on the declutch shift shaft 3, can move axially along declutch shift shaft 3 under external force, realizes the conversion of gearbox high, low speed gear.Shifting fork bar 2 is tilting asymmetric arc-shaped structure, the upper end is provided with the hole 4 that cooperates with declutch shift shaft 3, one epitaxial lateral overgrowth of shifting fork bar 2 stretches out short straight rod 21, and the ratio of the length a of short straight rod 21 and shifting fork bar 2 arc diameter Φ is 0.08～0.10, and shifting fork bar 2 is inserted in the circular groove of power shift gear.Because shifting fork bar 2 is little with the area of contact of power shift gear circular groove, and has only a side to extend short straight rod 21, shifting fork bar 2 very easily overturns during gear shift, causes reverse shift fork out of supply.The working load of especially large-scale crawler reaper is big, and the flop phenomenon of reverse shift fork is more outstanding, can cause security incident when serious, because gearbox is contained in the reaper chassis, need remove multinomial parts during maintenance, operates very inconvenient.
The model utility content
The purpose of this utility model provides a kind of simple in structure, the motor vehicle gear changing shift fork that can not overturn during gear shift.
The utility model is achieved by the following technical programs:
A kind of gearbox gear-shift shift fork, the shifting fork bar 2 that comprises shift fork body 1, extends to both sides from shift fork body 1, the upper end of shift fork body 1 is provided with shift fork axis hole 4, and described shifting fork bar 2 is the semicircular structure of symmetry, and shifting fork bar 2 two ends extend outward short straight rod 21 respectively from semicircle.
The purpose of this utility model can also further realize by following technical measures.
Aforesaid gearbox gear-shift shift fork, the ratio of the semicircle diameter of phi of the length a of wherein said short straight rod 21 and shifting fork bar 2 is 0.2～0.3.
The utility model is simple in structure, shifting fork bar adopts the semicircular structure of symmetry, and short straight rod is all extended in the shifting fork bar both sides, the ratio of the length a of short straight rod and the semicircle diameter of phi of shifting fork bar is increased to 0.2～0.4 from 0.08～0.10 of existing gearbox gear-shift shift fork, increased the area of contact of reverse shift fork and power shift gear circular groove, shift fork can not overturn, and guarantees the smooth gearshift of reaper gearbox, has further strengthened the reliability and stability of reverse shift fork.Simultaneously, maintenance rate reduces greatly, and the reliability of reaper gearbox is improved significantly.
Advantage of the present utility model and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiments only provide as an example with reference to accompanying drawing.
Description of drawings
Fig. 1 is the structural representation of existing reaper reverse shift fork;
Fig. 2 is a structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 2, the utility model comprises shift fork body 1, from the shifting fork bar 2 that shift fork body 1 extends to both sides, and the upper end of shift fork body 1 is provided with shift fork axis hole 4, makes the utility model to move on declutch shift shaft.Shifting fork bar 2 is the semicircular structure of symmetry, and shifting fork bar 2 two ends extend outward short straight rod 21 respectively from semicircle, and the ratio of the semicircle diameter of phi of the length a of short straight rod 21 and shifting fork bar 2 is 0.2～0.3.The ratio of the length a of the short straight rod 21 of present embodiment and the semicircle diameter of phi of shifting fork bar 2 is 0.22, makes shifting fork bar 2 can not break away from the power shift gear circular groove, has improved the reliability of reaper gearbox work.
In addition to the implementation, the utility model can also have other mode of executions, and all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (2)
1. gearbox gear-shift shift fork, the shifting fork bar (2) that comprises shift fork body (1), extends to both sides from shift fork body (1), the upper end of shift fork body (1) is provided with shift fork axis hole (4), it is characterized in that: described shifting fork bar (2) is the semicircular structure of symmetry, and shifting fork bar (2) two ends extend outward short straight rod (21) respectively from semicircle.
2. gearbox gear-shift shift fork as claimed in claim 1 is characterized in that: the ratio of the semicircle diameter of phi of the length a of described short straight rod (21) and shifting fork bar (2) is 0.2～0.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201704362U CN201672050U (en) | 2010-04-23 | 2010-04-23 | Gear shifting fork of speed-changing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201704362U CN201672050U (en) | 2010-04-23 | 2010-04-23 | Gear shifting fork of speed-changing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201672050U true CN201672050U (en) | 2010-12-15 |
Family
ID=43329462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201704362U Expired - Fee Related CN201672050U (en) | 2010-04-23 | 2010-04-23 | Gear shifting fork of speed-changing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201672050U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103562602A (en) * | 2011-05-11 | 2014-02-05 | 爱信Ai株式会社 | Shift operation member of transmission |
| CN104760610A (en) * | 2015-04-28 | 2015-07-08 | 浙江龙虎锻造有限公司 | Yoke body of automotive non-sliding yoke |
| CN106402379A (en) * | 2016-05-28 | 2017-02-15 | 重庆万虎机电有限责任公司 | Gearbox and shifting fork thereof |
-
2010
- 2010-04-23 CN CN2010201704362U patent/CN201672050U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103562602A (en) * | 2011-05-11 | 2014-02-05 | 爱信Ai株式会社 | Shift operation member of transmission |
| CN103562602B (en) * | 2011-05-11 | 2015-11-25 | 爱信Ai株式会社 | The shift operating member of gearbox |
| CN104760610A (en) * | 2015-04-28 | 2015-07-08 | 浙江龙虎锻造有限公司 | Yoke body of automotive non-sliding yoke |
| CN106402379A (en) * | 2016-05-28 | 2017-02-15 | 重庆万虎机电有限责任公司 | Gearbox and shifting fork thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20150423 |
|
| EXPY | Termination of patent right or utility model |