JPH0441148U

JPH0441148U -

Info

Publication number: JPH0441148U
Application number: JP8387390U
Authority: JP
Priority date: 1990-08-07
Filing date: 1990-08-07
Publication date: 1992-04-08

Description

[Brief explanation of drawings]

図面は本考案に係る作業車の走行変速機構造の
実施例を示し、第１図は静油圧式無段変速装置の
操作アーム及び牽制部材付近の側面図、第２図は
静油圧式無段変速装置の操作アーム及び牽制部材
付近の平面図、第３図は静油圧式無段変速装置の
油圧回路図、第４図はホイルローダの全体側面図
、第５図は別実施例における牽制部材付近の側面
図である。７……静油圧式無段変速装置、１２……トラニ
オン軸、１３……操作アーム、１４……シリンダ
、１４ａ……ピストンロツド、２１……牽制部材
、２１ａ……牽制部材のアーム部、２３……ネジ
ロツド、２６……筒部材、Ｎ……中立位置、ＦＬ
……低速位置、ＦＭＡＸ……最高速位置。 The drawings show an embodiment of the structure of a traveling transmission for a work vehicle according to the present invention, and FIG. 1 is a side view of the operating arm and the restraining member of the hydrostatic continuously variable transmission, and FIG. 2 is a side view of the hydrostatic continuously variable transmission. FIG. 3 is a hydraulic circuit diagram of the hydrostatic continuously variable transmission; FIG. 4 is an overall side view of the wheel loader; and FIG. 5 is a plan view of the vicinity of the restraint member in another embodiment. FIG. 7... Hydrostatic continuously variable transmission, 12... Trunnion shaft, 13... Operating arm, 14... Cylinder, 14a... Piston rod, 21... Checking member, 21a... Arm portion of checking member, 23... ...Threaded rod, 26...Cylinder member, N...Neutral position, FL
...low speed position, FMAX...highest speed position.

Claims

[Scope of Claim for Utility Model Registration] An operation arm 13 is fixed to a trunnion shaft 12 of a hydrostatic continuously variable transmission device 7 for traveling, and a piston rod 1 of a cylinder 14 is attached to a fixed part of the aircraft body.
4a is attached to the operating arm 13, and the hydrostatic continuously variable transmission 7 is configured to be able to change speed by swinging the operating arm 13 by extending and contracting the piston rod 14a. A traveling transmission structure for a work vehicle having the configurations described in [A] to [C] below. [A] Piston rod 1 between the end of the cylinder 14 on the operating arm 13 side and the operating arm 13
4a, a restraining member 21 is provided with a pair of arm portions 21a that sandwich the piston rod 14a from both sides. [B] A threaded rod 23 is provided on one of the restraining member 21 and the fuselage fixing portion, and a cylindrical member 26 with a threaded hole is provided on the other, and the threaded rod 23
By screwing together the cylindrical member 26 and rotating one of the threaded rod 23 and the cylindrical member 26, the check member 21 can be slid in a direction substantially perpendicular to the piston rod 14a. [C] When the piston rod 14a contracts from the neutral position N to the predetermined low speed position FL by the sliding operation of the check member 21, the arm portion 21a of the check member 21 is sandwiched between the operating arm 13 and the cylinder 14, and the piston rod The state in which the contraction of piston rod 14a is stopped and the maximum speed position F of piston rod 14a
The arm portion 21a of the restraining member 21 is formed so as to be able to switch to a state that allows contraction up to MAX.