JPH0262156U

JPH0262156U -

Info

Publication number: JPH0262156U
Application number: JP14241288U
Authority: JP
Priority date: 1988-10-31
Filing date: 1988-10-31
Publication date: 1990-05-09

Description

[Brief explanation of drawings]

第１図乃至第４図は本考案の一実施例を示し、
第１図は実施例構造の詳細縦断面図、第２図は本
考案を適用した農用トラクターの変速装置の縦断
面図、第３図は同上主変速装置のリバース軸部の
縦断面図、第４図は同上変速装置のシフトフオー
ク部の横断面図、第５図は従来のリバース軸部の
縦断面図である。第６図はスペーサと兼用すると
共に軸との共回りを防止したすべり軸受を設けた
伝動軸の縦断面図、第７図はその共回り防止部の
縦断面図、第８図は同上部の平断面図である。１……主変速装置ケース、１ａ……ケース軸受
ボス、１ｃ……ケース側壁、４……リバースドラ
イブギヤ、９……リバースドリブンギヤ、１９…
…リバースアイドラーギヤ、２０……リバース軸
、２０ａ……リバース軸頭部、２０ｂ……リバー
ス軸端部、３０……スペーサ、３２……クラツチ
レリーズハブサポート、３３……位置決めボルト
。 1 to 4 show an embodiment of the present invention,
Fig. 1 is a detailed longitudinal cross-sectional view of the structure of the embodiment; Fig. 2 is a longitudinal cross-sectional view of a transmission for an agricultural tractor to which the present invention is applied; Fig. 3 is a longitudinal cross-sectional view of the reverse shaft portion of the main transmission; FIG. 4 is a cross-sectional view of a shift fork portion of the same transmission, and FIG. 5 is a longitudinal cross-sectional view of a conventional reverse shaft portion. Fig. 6 is a longitudinal cross-sectional view of a transmission shaft equipped with a sliding bearing that also serves as a spacer and prevents co-rotation with the shaft, Fig. 7 is a longitudinal cross-section of its co-rotation prevention part, and Fig. 8 is a longitudinal cross-section of the upper part of the transmission shaft. FIG. DESCRIPTION OF SYMBOLS 1... Main transmission case, 1a... Case bearing boss, 1c... Case side wall, 4... Reverse drive gear, 9... Reverse driven gear, 19...
... Reverse idler gear, 20 ... Reverse shaft, 20a ... Reverse shaft head, 20b ... Reverse shaft end, 30 ... Spacer, 32 ... Clutch release hub support, 33 ... Positioning bolt.

Claims

[Scope of utility model registration request]

In the reverse shaft of the main transmission that supports the reverse idler gear meshed between the reverse drive gear and the reverse driven gear, the head of the reverse shaft is supported by a bearing boss of the case of the main transmission, and the end of the reverse shaft is supported by a bearing boss of the case of the main transmission. The spacer is supported on the side wall of the main transmission case via a spacer, the inner and outer end surfaces of the spacer are brought into contact with the side surface of the reverse idler gear and the clutch release hub support adjacent to the main transmission case, and the reverse shaft end is A mounting structure for a berth shaft in a main transmission, characterized in that it is prevented from coming off by a positioning bolt inserted into a side wall of a main transmission case.