JPS5962769A - Speed change operation device of transmission mechanism - Google Patents

Abstract

PURPOSE:To facilitate operations of alignment of a rotary shaft and its assembling-in by bearing the rotary shaft, which supports the shift arm of a speed change mechanism mounted in a spacer transmission case, only with this spacer transmission case. CONSTITUTION:A shift arm 29 in engagement with a shifter 24 is mounted on a cylindrical rotary shaft 28, which is made possible only to rotate by means of transverse penetration of the flange 3a of a spacer transmission case 3, at which the speed change mechanism is installed, and another shift arm 31 in engagement with a shifter 25 is mounted on a rod-shaped rotary shaft 30 fitted internally in said rotary shaft 28. Operation levers 32, 33 are fixed to these rotary shaft 28, 30 outside the spacer transmission case 3 and connected to the change lever provided in the neigbnorhood of driver seat of a tractor through an appropriate link mechanism. According to this arrangement, operations of assembling-in of the rotary shaft 28 and its alignment will be much facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gear shift operating device for a transmission mechanism of a tractor.

Tractors are required to run over a wide speed range, from high speeds on the road to ultra-low speeds when digging deep trenches, for example, and therefore require a multi-stage transmission mechanism.

In order to facilitate specification changes according to these main work uses, the mission case is divided into front, space, and rear mission cases.
These mission cases, each equipped with a transmission mechanism, are combined as appropriate to form a mission mechanism. In order to make the overall length of the mission case approximately the same regardless of the presence or absence of the spacer mission case (=, the spacer mission case is inserted near the rear end opening and front end opening of the front mission case and the rear mission case). The applicant has already proposed a spacer transmission case that is configured to be clamped at each end of the front and rear transmission cases. The structure is such that the rotation shaft that supports the shift arm for operation is mounted on the rear transmission case, so the shaft support hole (
: The work of aligning this rotating shaft becomes difficult.

Therefore, in this invention, the rotation shaft that supports the shift arm of the transmission mechanism mounted on the spacer transmission case is mounted only on the spacer transmission case.
1. This makes it easier to align and assemble the brake shaft.

The explanation will be based on a 1% example of a 4f'/7-frame structure. Insert the spacer mission cases (8) in the vicinity of each of the n11 openings in 2), and insert the surrounding flanges (8a) into the rear ends of these mission cases (1a).
) and the front end (2a), and connect these transmission cases with bolts to form one mission case (2).

The front transmission case (1), the spacer transmission case (8), and the rear transmission case (2) are equipped with transmission mechanisms, respectively.

That is, an input shaft is driven via the engine and main clutch on the left and right sides of FIG. Then, the rear part of the first speed change shaft (4) is supported on the front wall (ab) of the spacer transmission case (8) by a bearing (5), and the first
A counter I1% II (61) is pivotally supported on the partition wall of the front mission case (1) and the front wall (8b) of the spacer mission case (8) with a bearing (7), and the counter of the lth counter shaft (6) The gear group (8) is connected to the first gear shift shaft (
4) is engaged with the change gear group (9).

The spacer mission case (8) has its upper surface and rear end (
8c) is opened, and a bearing cover (11) is attached to the rear end (8c), and the front part of the gearshift shaft 0 return of the transmission mechanism is connected to the first gearshift shaft at the "bearing α". (4), and the rear part is attached to the bearing cover (11 (
The two are each pivotally supported, the counter shaft α is pulled out, the front part is supported on the front wall (8b) with bearings 0!19, and the rear part is pivotally supported on the bearing cover (11) with bearings αQ, The tooth portion (4a) of the first speed change shaft (4) is connected to the counter gear o7) of the kakunta shaft α, and the freely rotating change gears α and 01 are connected to the counter gear o7) of the first speed change shaft (11). Tooth part of axis α◆ (
14a) and (]x), and fit the hub wing and Q◇ on the shift shaft θ1) on the left and right sides of the change gear 0, and the hub wing and Qvji are slides that can move in the longitudinal direction (only 2) After fitting the coupling e and the bridge, the front slide coupling Q→ can be attached to the teeth (cross) of the Ng 1 speed change shaft (4) or the crest (18a) of the change gear α mark. Also, the rear slide coupling Q! is installed so that it can be engaged and disengaged from the teeth β (19a) of the change gear α, and the rear slide coupling Q! Shifter stays (shifter stays and
l: Fixed, the flange (8a) of the spacer mission case (3) is laterally (passed through the two shells) and the shifter engages with the cylindrical rotation shaft (c) which can only rotate freely. Attach the arm (C), and attach the shift arm (0) that engages with the shifter shaft to the rod-shaped rotation shaft (G) inserted into this rotation shaft (E) with a spacer Mission case (8
)'A (fill 15 (2) Attach the operating levers (3 and 01) to these rotating shafts (c) and (g), respectively, and then connect the operating levers (0 to 0) through an appropriate link mechanism. ℃
It is connected to the change lever near the driver's seat of the tractor.

Therefore, operate the operation lever 0→
= Therefore, the front slide coupling Q is connected to the teeth part (4b
) (If the two engage, the shift shaft αυ is directly connected to the first shift shaft (4), and the shift mechanism color Φ becomes the highest speed. Also, if the slide coupling Q → is engaged with the tooth 814 (18a), ,
The rotational power of the first gear I (4) is decelerated by the meshing of the teeth (4a) and the counter gear θη, and the gear teeth (14a) and the change gear 0→, and the rotational power of the first gear I (4) is reduced at the slowest speed. ])
is rotated, and by operating the operating lever (3:) and moving the rear slide coupling blade (E), the toothed portion (19a) C2 engages with the first gear shift shaft ( 4)
The rotational power is decelerated by the meshing of the teeth (4a) and the counter gear α, and the teeth (14b) and the change gear α9), at a speed intermediate between the direct connection and the slowest deceleration. The gear shift shaft 0 will now rotate.

Then, look up at the drive pinion axis 0 of the transmission mechanism (L).
The front part is attached to the rear part of the transmission shaft Qυ with the bearing 0 →, and the rear part IS is attached to the rear wall (2b) of the bearing (t*071+2) of the 9-yamination case (2), respectively with ab support 7 , to the counter shaft), its front part is attached to the bearing 0, and the rear part of the counter shaft (11 is attached to the bearing θQ
They are respectively supported on the rear wall (2b), and the counter shaft (b) (2) The counter gear group αυ which is rotating freely is connected to the change gear group 0→ which is fitted to the drive pinion shaft 0◆.
It is consistent with

In addition, gear 0 fitted to drive pinion shaft 0φ:
) is the gear (G) that meshes with the rear transmission case (2).
It meshes with the power extraction gear peeking through the hole (2C), allowing the power for driving the work equipment to be taken out to the front of the transmission case. This is the PTO drive shaft to extract the power.

It should be noted that the types of the transmission mechanisms Cl-1, Cl-1, and Cl-1 are not limited to those in the embodiments described above.

The transmission mechanism gear shift operating device according to the present invention supports the shift arm (c) of the transmission mechanism mounted on two spacer mission cases (8) C, like a double series. Since the rotation +ll+(c)... is configured to be mounted only on the spacer mission case (8), alignment and insertion of the rotation shaft (c) during assembly work is easy. The complexity of aligning the holes in the two inner and outer transmission cases, which is present in the conventional device described above, can be completely eliminated, resulting in an extremely simple device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional side view of the mission mechanism, and FIG. 2 is a longitudinal sectional front view of the main part of FIG. 1. Code explanation (11...Front mission case (LA)
(Etc)...Rear end (2)...Rear transmission case (2a)...
...Front end (2b)...Outside/rear wall (2c)
...... Hole (8) ... Spacer mission case (8a) ... Flange (8b)
・・・・・・Front wall (4)・・・・Shift gear shaft (4L
) (Sen) (1 Buddha x 141)) (lla)...
Teeth (5) (7) (8) O-aθ30υOQ(g)O
fH3 force ca*'ome... Counter gear group (6
)...First counter shaft (9)0→・Curve・Change gear group (11...Bearing cover αη・
・・・・・・Shift axis α4 (to)・・・・・・Counter ah
(17)・-・-・Counter gear 0 barrel (6)・・
...Change gear) (Foundation)...Hub E
> (43...Slide coupling QΦ(c)...Shifter (c)(a)...
・Jitter stay ←))...Rotation axis (
B) 0◇・・・Shift arm 0 → 0 nid・・・・
・Operation lever 0... Drive pinion shaft Q
:)O,■・・・・・・Gear ■・・・・・・
PTO drive shaft (H) (M) (L) ・・・・・・
Shift 81 drawing patent applicant: Iseki Agricultural Machinery Co., Ltd. [I Agent Patent Attorney Takayoshi Hayashi □ Procedural amendment fC method) Patent Office Commissioner Kazuo Wakasugi, dated 35/8/1988 1 Case display request No. 178477/1982 2 Name of s Ming Transmission mechanism gear change operation Device 3 Part 1 with the case of the person making the amendment '# Shutout applicant Tokoroi Seki No. 8! Co., Ltd. Name 4 Director Address 1-1 Nihombashi Kayabacho 1-2, Chuo-ku, Tokyo 103
Equipment (668) 7921~3 -, -,, -
1 (6057) Patent Attorney Takayoshi Hayashi-1
−□□! 5. Date of amendment order: February 22, 1972 6.
Target of correction Akira - Rose

Claims (1)

[Claims] A spacer mission case is inserted between the front end opening and the rear end of each of the front mission case and the rear end of the front mission case in which the transmission mechanism is mounted. case and 9
A transmission mechanism is mounted on this spacer transmission case, and a rotating shaft that supports a shift arm for operating this transmission mechanism is attached to a spacer transmission case. Case (a transmission control device with a Mission M design, consisting of only two shafts).