JPH0256946U

JPH0256946U -

Info

Publication number: JPH0256946U
Application number: JP13624788U
Authority: JP
Priority date: 1988-10-18
Filing date: 1988-10-18
Publication date: 1990-04-24

Description

[Brief explanation of drawings]

第１，２図は本考案の実施例を示しており、第
１図は前進４段後進１段状態の変速装置を示す断
面図、第２図は前進３段後進１段状態の変速装置
を示す断面図、第３図はトラクタの動力伝達系の
線図である。７……主筒軸（駆動軸）、７ａ〜７ｄ……ピニ
オン、８……前進ギヤ群、８ａ〜８ｄ……ギヤ、
９……後進ギヤ群、１０……カウンタ軸、２９…
…シフタボス、３０……シフタ、３１……バツク
ギヤ、３２……アイドラギヤ、３３……バツク軸
、３４……止め輪、３７……位置設定部材、Ｂ…
…主変速機構。 Figures 1 and 2 show an embodiment of the present invention. Figure 1 is a sectional view showing a transmission with 4 forward speeds and 1 reverse speed, and Figure 2 shows a transmission with 3 forward speeds and 1 reverse speed. The sectional view shown in FIG. 3 is a diagram of the power transmission system of the tractor. 7... Main cylinder shaft (drive shaft), 7a to 7d... Pinion, 8... Forward gear group, 8a to 8d... Gear,
9... Reverse gear group, 10... Counter shaft, 29...
...Shifter boss, 30...Shifter, 31...Back gear, 32...Idler gear, 33...Back shaft, 34...Retaining ring, 37...Position setting member, B...
...Main transmission mechanism.

Claims

[Claims for Utility Model Registration] The first to fourth pinions 7a to 7d are fixed on the drive shaft 7, and the first to fourth pinions 7a to 7d are mounted on a counter shaft 10 parallel to the drive shaft 7 and meshed with the first to fourth pinions 7a to 7d. ~4
The gears 8a to 8d are loosely fitted, and the first and second gears 8a, 8
between the first and second shifter bosses 29a fixed to the counter shaft 10, and between the third and fourth gears 8c and 8d, respectively.
29b, and externally engages with each shifter boss 29a, 29b, and selectively engages with shifter gear portions a, b of first and second gears 8a, 8b and shifter gear portions c, d of third and fourth gears 8c, 8d. A back gear 31 is loosely fitted onto the counter shaft 10 adjacent to the first gear 8a, and a third shifter boss 29c is fixed. This is a transmission in which a third shifter 30c that can mesh with the shifter gear part e of 31 is externally engaged, and an idler gear 32 that meshes with the first pinion 7a and the back gear 31 is loosely fitted onto a back shaft 33 parallel to the drive shaft 7. The back gear 31 is reversed in the axial direction, and a position setting member 37 is provided in place of the first gear 8a, the third shifter boss 29c, and the third shifter 30c, so that the back gear 31 is positioned adjacent to the first shifter boss 29a on the counter shaft 10. The shifter gear part e of the back gear 31 can be fitted loosely into the first shifter 30a, and the idler gear 32, which is meshed with the first pinion 7a, is connected to the back gear 3 after being reversed.
1. A transmission device characterized in that the transmission device is formed so that its position can be changed on a back shaft 33 so as to mesh with the transmission device 1.