JPH01107632U

JPH01107632U -

Info

Publication number: JPH01107632U
Application number: JP284288U
Authority: JP
Priority date: 1988-01-12
Filing date: 1988-01-12
Publication date: 1989-07-20

Description

[Brief explanation of the drawing]

図面は本考案に係る四輪駆動型作業車の実施例
を示し、第１図は前輪変速装置における咬合式ク
ラツチの縦断正面図、第２図は前輪変速装置の縦
断側面図、第３図は前輪操向用のピツトマンアー
ムと前輪変速装置との連係状態を示す平面図、第
４図は操作アームへのピンの取付け構造を示す平
面図、第５図は農用トラクタの全体側面図、第６
図は別実施例における前輪変速装置の縦断側面図
である。１……前輪、６……前輪変速装置、１０……被
咬合部材、１０ａ……被咬合部材の咬合用凸部、
１５……シフト部材、１５ａ……シフト部材の咬
合用凸部、１６……咬合式クラツチ、Ａ_１，Ａ_２……咬合用凸部の円周方向幅、Ｂ_１，Ｂ_２……咬
合用凸部の配列ピツチ。 The drawings show an embodiment of a four-wheel drive type work vehicle according to the present invention, in which FIG. 1 is a longitudinal sectional front view of the articulating clutch in the front wheel transmission, FIG. 2 is a longitudinal sectional side view of the front wheel transmission, and FIG. FIG. 4 is a plan view showing the linkage between the pitman arm for steering the front wheels and the front wheel transmission; FIG. 4 is a plan view showing the structure for attaching the pin to the operating arm; FIG.
The figure is a longitudinal sectional side view of a front wheel transmission in another embodiment. DESCRIPTION OF SYMBOLS 1... Front wheel, 6... Front wheel transmission, 10... Occluded member, 10a... Occlusal convex part of engaged member,
15... Shift member, 15a... Occlusal convex portion of shift member, 16... Occlusal clutch, A ₁ , A ₂ ... Circumferential width of the occlusal projections, B ₁ , B ₂ ... Arrangement pitch of the occlusion projections.

Claims

[Scope of utility model registration request]

Transmission is performed at a drive speed that is approximately equal to the rear wheel drive speed.
The front wheel transmission device 6 can be selectively switched between a standard drive state and an increased speed drive state in which transmission is performed at a drive speed higher than the rear wheel drive speed by sliding a single shift member 15. A clutch 16 is provided in the transmission system to the front wheel 1, and is provided on the standard drive side of the front wheel transmission 6 in an occlusally biased state, and includes an occlusal clutch 16 consisting of the shift member 15 and the occluded member 10 corresponding to the shift member 15. , the arrangement pitches B _{1 and} B ₂ of the occlusal protrusions 15a and 10a of the shift member 15 and the occlusal member 10 correspond to the occlusal protrusions 15a and 10a.
The occlusal convex portions _15a , 10a are arranged so as to be approximately three times the circumferential width A1, _A2 of
A linking mechanism is provided to link the front wheel steering mechanism and the shift member 15, and if the steering angle of the front wheel 1 is within a set angle from the straight-ahead position, the biasing force of the shift member 15 causes the engagement type clutch 16 to move toward the entry side. The four-wheel drive working vehicle is operated in such a manner that when the front wheels 1 are steered beyond a set angle, the shift member 15 is forcibly operated to the speed-increasing drive side.