JPS63104226U - - Google Patents
Info
- Publication number
- JPS63104226U JPS63104226U JP20180386U JP20180386U JPS63104226U JP S63104226 U JPS63104226 U JP S63104226U JP 20180386 U JP20180386 U JP 20180386U JP 20180386 U JP20180386 U JP 20180386U JP S63104226 U JPS63104226 U JP S63104226U
- Authority
- JP
- Japan
- Prior art keywords
- front wheel
- transmission
- drive
- arm
- speed
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Arrangement And Driving Of Transmission Devices (AREA)
- Gear-Shifting Mechanisms (AREA)
Description
図面は本考案に係る作業車の前輪変速操作構造
の実施例を示し、第１図はピツトマンアーム及び
天秤アーム周りの平面図、第２図は第１図におけ
る―方向からの矢視図、第３図は第１図にお
ける―方向からの矢視図、第４図は前輪変速
装置の縦断側面図、第５図は農用トラクタの全体
側面図、第６図及び第７図は本考案と従来例とを
比較する為の概略図である。
１ａ，１ｂ……前輪、６……前輪変速装置、６
ａ……切換操作部、２２……ピツトマンアーム、
２４……天秤アーム、２６……カム機構、Ｐ２…
…縦軸芯。
The drawings show an embodiment of the front wheel speed change operation structure for a working vehicle according to the present invention, in which Fig. 1 is a plan view of the area around the pittman arm and the balance arm, Fig. 2 is a view taken from the - direction in Fig. 1, and Fig. The figure is a view taken from the - direction in Figure 1, Figure 4 is a longitudinal side view of the front wheel transmission, Figure 5 is an overall side view of the agricultural tractor, and Figures 6 and 7 are the present invention and conventional examples. FIG. 2 is a schematic diagram for comparison. 1a, 1b...Front wheel, 6...Front wheel transmission, 6
a...Switching operation unit, 22...Pittman arm,
24... Balance arm, 26... Cam mechanism, P 2 ...
...Vertical axis center.
Claims (1)
後輪駆動速度と略等しい駆動速度で伝動する標準
駆動状態と、後輪駆動速度より大きい駆動速度で
伝動する増速駆動状態とに切換える機械操作クラ
ツチ式の前輪変速装置６を備えた作業車の前輪変
速操作構造であつて、前輪１ａ，１ｂ操向用のピ
ツトマンアーム２２側方の縦軸芯Ｐ２周りに揺動
自在な天秤アーム２４を設けると共に、前記天秤
アーム２４の一端部と前輪変速装置６の切換操作
部６ａとを機械的に連動連結し、天秤アーム２４
の他端部と前記ピツトマンアーム２２との間にカ
ム機構２６を構成して、直進状態から設定角度以
上のピツトマンアーム２２の揺動動作により、天
秤アーム２４が揺動して前輪変速装置６が増速駆
動側に切換操作されるように構成してある作業車
の前輪変速操作構造。 In the transmission system to the front wheels 1a, 1b, which can be steered freely,
A work vehicle equipped with a mechanically operated clutch-type front wheel transmission 6 that can switch between a standard drive state in which transmission is performed at a drive speed substantially equal to the rear wheel drive speed and an increased speed drive state in which transmission is performed at a drive speed greater than the rear wheel drive speed. The front wheel speed change operation structure includes a lever arm 24 swingable around a vertical axis P2 on the side of a Pitman arm 22 for steering the front wheels 1a and 1b, and one end of the balance arm 24 and the front wheel speed change device. The balance arm 24 is mechanically interlocked with the switching operation section 6a of 6.
A cam mechanism 26 is constructed between the other end and the Pitman arm 22, and when the Pitman arm 22 swings from a straight-ahead state to a predetermined angle or more, the balance arm 24 swings and the front wheel transmission 6 speeds up. A front wheel gear shift operation structure for a work vehicle configured to be switched to the drive side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20180386U JPH0414274Y2 (en) | 1986-12-26 | 1986-12-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20180386U JPH0414274Y2 (en) | 1986-12-26 | 1986-12-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63104226U true JPS63104226U (en) | 1988-07-06 |
| JPH0414274Y2 JPH0414274Y2 (en) | 1992-03-31 |
Family
ID=31165596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20180386U Expired JPH0414274Y2 (en) | 1986-12-26 | 1986-12-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0414274Y2 (en) |
-
1986
- 1986-12-26 JP JP20180386U patent/JPH0414274Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0414274Y2 (en) | 1992-03-31 |
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