JPS5947550A - Reversing gear mechanism for tractor - Google Patents

Abstract

PURPOSE:To make it possible to easily change the specifications of a reversing gear mechanism for switching the travel direction of a tractor into the backward direction, by replaceablly arranging, in the retaining section of a mission casing, bearings for a back idle gear which is adapted to engage with a change gear and a back gear. CONSTITUTION:A back idle gear 8 is supported through a shaft 10 to a back idle gear holding part 7 of Box-like cross-sectioned shape used in a reversing gear mechanism 6, on one lateral wall of a spacer mission casing 5 which is disposed between front and rear mission casings 1, 3. This shaft 10 is carried at both ends by bearing members 11 which are attached to the holding part 7 by means of bolts 13 and knock pins 14. The gear 8 is meshed with both change and back gears 15, 16. Further, when the gears 15, 16 are changed into gears having pitch diameters different from those of the former, such a measure is taken that other type of bearing members 11 having a shaft 10 whose securing position is changed, are replaced with the afore-mentioned bearing members 11.

Description

[Detailed Description of the Invention] This invention! This relates to a reverse gear mechanism for switching WAm to reverse.

For tractors, lobes are attached to handle R' of fertilizers, etc.
Since reverse travel is frequently performed, such as repeating forward and reverse travel to unload the vehicle, a model with a high reverse travel speed is often required to improve efficiency, but conventionally, in such cases, reverse travel A modified version of the transmission case where the gear mechanism is mounted is manufactured and used. However, changing the busy mission case itself in this way is extremely disadvantageous in terms of marking and deterioration of parts.

Therefore, in this invention, a bearing body that is provided to pivotally support a back idle gear that meshes with both a change gear and a bank gear that are pivotally supported by a transmission case can be attached to a back idle gear holding portion of this mission case. When replacing the change gear, back gear, and bank idle gear with ones with different pitch diameters, it becomes a trap that can be dealt with by changing the above-mentioned mounting position of the bearing body. This change eliminates the need to change the mission case and maintains its standardization.

The specific structure of this system will be explained based on an example in which the reversing gear mechanism is not mounted directly on the transmission case but via a spacer transmission case. As shown in the longitudinal side view in Figure 1, the rear end opening (2) of the transmission case (1)
) Near the front end opening (4) of the transmission case (3) - insert the flange (5a) around the inserted transmission case (5) into the rear end (1) of the transmission case (1).
a) and nfJ? W (3a) and these three parts are connected to each other with bolts (not shown), and this spacer mission case (5 reversible gear mechanism (6)) is mounted on an internal shaft. The figure shows the view from line A-A in FIG. The gear (8) is rotatably mounted on the shaft (1 (#) via the bearing (9), and both ends of the shaft OI are supported by the lid-shaped bearing body (1υ old) K, and the back idle gear holding part (7) front and rear atII walls (7a) (7b) K long holes (7c) (7r),
The spacer is provided along the left and right direction of the transmission case (5), and the shaft f
Both ends of 10) are provided with elongated holes (7c) (7d) so that they can be moved in the left-right direction of the spacer transmission case (5), and the bearing weight III) is attached to the bolt α (... and the knock pin (14)...・Use the back idle gear holding part (
+11 so that it can be installed on
This back idle gear (back idle gear) should mesh with both.

Then, the partition wall of the front transmission case (1) is connected to the rear part of the input +rql+ +171 driven by the engine not shown through the main clutch by the change gear ON and the back gear (explaining one shaft support). (1b), and the first gearbox (for example, the front part of the first gearbox is supported by a bearing (: 'IIK), and the rear part of the input shaft (1η) is Bearing 12'IK spacer mission case (
5) are respectively supported on the front wall (5b) of the first counter i! ! K
The first counter gear group (5) fitted to the first counter shaft (H3) and the first shift gear group (5) fitted to the first shift shaft (H3) are respectively supported. They mesh to form a first stage transmission mechanism (19).

And the scratch on the reverse gear mechanism (6) 2nd shift 4q! + (2 chants, bearing the front part (1st transformer (2Lb)
Also, the rear part of the bearing C (19K is pivotally supported on the rear wall (5C) of the spacer mission case (5), and the second counter shaft mark) is attached to the front part of the bearing (3 Bearing (to) the wall (5b) and its rear part
K and the rear wall (5C) are respectively supported, @2 shift shaft CQK change gear (one is free rotating, back gear (161) is fitted to the second counter shaft (31), 4' 1st shift + itl + The gear (fishing) of (?ll) is the counter gear Q4) of the second counter shaft rule, and the change gear C3!9, which is idle in the second shift shaft C', is the counter gear of the second kakunta shaft Gυ. This back gear mechanism (6) is formed into a constant velocity mesh type because it meshes with (A).
If the front slide coupling <37) is moved forward (to the left in Figure 1), it will be connected to the first shift shaft (A) via the hub gear which is fixedly attached to the second shift shaft marked AI. 2nd gear shift shaft r
2H is directly connected, and on the contrary, slide horn ring C371
When the hub gear (3Fl) and change gear 1150 are moved rearward, the rotation of the second counter shaft (31) is reversed by the back idle gear (8), and the rotation of the second counter shaft (31) is reversed by the back idle gear (8).
When the gear shift shaft (a) rotates backwards, move slide coupling 01 (-) backwards by 1,000 yen! r, 2-speed shift shaft (:) will be rotated in the forward range/actual rotation.

In addition, a drive pinion shaft (401 is the second gear shift fj%Jτr; t<9
It is configured to drive a rear wheel differential mechanism (not shown) via the rear wheel.

When changing the change gear (19) and back gear (119) to ones with different pitch diameters, the bearing body (11
) The fixing position of the shaft (10) has been changed compared to the old) ] 11 receiver ++ 1) By transferring to Q 13, the back idle gear (
8) meshes with the above-mentioned changed change gear (first gear and back gear (16)).

Then, the change gears (19 and back gear 11.
6) For example, direct transmission case (1)
Or support 1111+ in the rear transmission case (3),
Even if the back idle gear holding part (the force is directly dependent on the structure provided in the transmission case), 1= of this invention
The first is that it can be made quickly enough.

Since the reverse gear mechanism of the tractor according to the present invention is configured as described above, in order to obtain a tractor with specifications that change the reverse speed formation, it is necessary to use the change gear (15) and the reverse gear 11G.
Pull the IK back idle gear (8) so that it matches 1IiQ.
If you select the bearing body ++ +o+ I:l that pivotally supports this back idle gear (8) in the position, and install this bearing body 1111υ to the standard transmission case of Q: The standard case can always be used regardless of changes in the specifications of the reverse speed, which greatly helps in unifying parts and reducing costs.

[Brief explanation of the drawing]

The figures show one embodiment of this invention. Fig. 1 is a longitudinal cross-sectional side view of the main part of the Mitsushicon case, and Fig. 2 is an A--A in Fig. 1.
It is a view taken along the line A. Code explanation (1)...Front transmission case (1a)...
Rear end (1b)...Partition wall (2)...11 parts between rear ends (3)...Rear transmission case (3a)...Front @ (4)...Front end opening (5)・・・
・Spacer mission case (5a)...flange
(5b)...Front wall (5c)...Back wall
(6)...Reverse gear mechanism (force...back idle gear (7a) (71))...upward 1 tea
(7c
)(2'4'?4)l:",+)e'uta(Ill C
(Butt 1't+ -... Bearing 111)... Bearing body (I-... Hole (+31... Bolt
(1.4)...Dowel pin ((s C3i
... Goo engine gear flfi) ... Back gear (171 ... Input shaft (Piro (, +1)
... Shift (Zi Koku 419 (Tung)... 1st shift shaft
(20a)...Gear ff! :()...first counter IiQII (2(3...first counter gear group t
near)...1st gear group r2 (to)...',
'p 2 modification 1 (輔61)...2nd counter shaft C
+4)Cf+)...Counter gear C(7)f3! '＋
1... Slide coupling (g-, tz bugya (
Hai... Drive pinion I! jtl patent applicant
IZE (Ki Co., Ltd.

Claims (1)

[Claims] The bearing body, which is provided to support the back idle gear that meshes with both the change gear and bank gear that are pivotally supported on the mission case, is designed so that it can be attached to the back idle gear holding part of the mission case. Tractor reversing gear mechanism.