JPS5878829A - Transmission structure for agricultural tractor - Google Patents

Abstract

PURPOSE:To facilitate the automation of machining and assembly of cases for an intermediate transmission chamber, a main speed-charging chamber for a movement line, a speed-changing chamber for a PTO line and an auxiliary speed-changing chamber for the movement line, by constructing these chambers as transmission chambers containing shafts having three common axes. CONSTITUTION:A main clutch chamber F, an intermediate transmission chamber A, a main speed-changing chamber B for a movement line, a speed-changing chamber C for a PTO line, an auxiliary speed-changing chamber D for the movement line and a differential speed-changing chamber E are located in order at the rear of an engine 1. In these chambers, many shafts for transmitting motive power are arranged with three common axes. In other words, a shaft 38 fitted with a multiple-disc hydraulic clutch 36, a main speed-changing shaft 9, an intermediate shaft 18 and an auxiliary speed-changing shaft 27 are aligned to one another, a main clutch shaft 35, an input shaft 10 for the movement line, a speed-changing shaft 19 for the PTO line and a bevel pinion shaft 29 are aligned to one another, and a shaft 39 fitted with a multiple-disc hydraulic clutch 37, an intermediate shaft 11 for the PTO line, an intermediate shaft 20 and a shaft 8 for the PTO line are aligned to one another.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention appropriately changes the speed of the engine power taken out through the main clutch using the main transmission mechanism and transmits it to the differential transmission device for driving the wheels. By the way, I changed the speed of some of Jin's aids and moved the rear part of the aircraft to P! This invention relates to a transmission structure for an agricultural tractor that can be taken out from the vehicle.

Regarding the transmission structure of agricultural tractors, various types of transmission can be obtained by setting the specifications of each mechanism according to the specifications, but conventionally, when configuring the transmission structure of In order to downsize the machine and use the conventional assembly method, each machine end is centrally placed in one place in the transmission case, or the power is distributed and the power is distributed through the shaft.
In terms of machining, there was no special relationship between each **na, and each was processed using dedicated preparation and handwork. For this reason, the dimensional accuracy between each mechanism of the assembled two wheels, mainly the dimensional accuracy of the wheel center spacing, is poor.Assembling is often done manually, and assembly + #IIJ / flower neck. It had become.

In addition, in recent years, agricultural tractors have often been turned on and off by valve operation, without operating the main clutch or changing gears, in order to frequently change the front and rear ranges or perform extremely large increases and decelerations during forward work. A transmission structure that can obtain the desired speed change state using a plate-type hydraulic clutch has been developed, but in this case, the introduction of this hydraulic clutch-type fluid flow mechanism changes the overall shape of the transmission. However, it was known as a general gear change type.

The present invention is effective in solving the above-mentioned problems in machining and assembling various mechanisms to be incorporated into a transmission, and is also advantageous in machining and assembling when incorporating a hydraulic clutch type transmission. The 2t-purpose is to provide a transfer structure that allows money to be issued.

Hereinafter, embodiments of the present invention will be described based on illustrative drawings.

Diagram M1 shows an outline of the construction of agricultural tractors, including the engine 11) and main clutch housing (2).
, the transmission case (3), the intermediate case (4) and the differential gear case (5) are connected in series in this order, and the engine power is appropriately shifted into gears within the case; the left and right rear axles of the differential gear case 15) li! ! dynamic export).

(61, = Transmission shaft (7) for the front table wheel 1fjA#, which is supported by the transmission case FW$I/C# in the front, and the P2O shaft (configured to transmit to 81) protruding from the rear) has been done.

An intermediate transmission source is formed in front of the transmission case (3; 1t! (3a)) and rear i! (2Jl) of the main clutch housing (2), and behind it is the main transmission chamber (2Jl) of the traveling system. Bl is formed, and the inside of the intermediate case (4) is formed as a PTE0 system transmission chamber 1cI, and in the first half of the differential gear case (5) there is an auxiliary gearbox for the running system, and in the second half. A differential transmission chamber (g) is formed in the.

Between the main transmission chambers, a transmission shaft (9), an input shaft u (1%-) and a first intermediate transmission shaft ull of the PTE0 system are supported parallel to each other in parallel with the upper FIC. Four types of gears (12'*bs'sd) with different diameters are fixedly installed, and the transmission shaft (9) K
is the sugar 1 gear (12 m) and the 4th gear (12 m) of the input shaft (7).
Placement gears (13&) and (14M) engaged with d), respectively.
are freely rotatably mounted via spline bosses (13b) and (14b), and a pair of shift gears uSl
(2) is fitted with a spline, and when the first shift gear u511 is shifted rearward and connected to the spline boss (13b) of the high speed gear (1311), the
By shifting forward and directly engaging the second gear (12b), the second speed is obtained, and by shifting the shift gear 11blt of 182 backward and engaging the second gear (12(1)), the third gear (12(1)
A main transmission mechanism @ is configured that can obtain third speed by directly engaging with the spline boss (14b) of the transmission gear (141), and fourth speed by shifting forward and fittingly connecting with the spline boss (14b) of the transmission gear (141). ◎ Then, the speed change shaft (9
9JK concentric coupling after 1: Jl! The connected relay shaft u6 extends to the upper part of the rear PTO speed chamber ICI.

PTO system variable shaft (C1 has lrJ relay shaft, shift shaft U
- and PTO shafts (8) are arranged vertically and supported in parallel, and the transmission shafts U, the input shafts (11j and -8) are disposed on the input shafts (11j and -8), is the above P'j'O
The second intermediate power transmission shaft is disposed abutting against the rear end of the second intermediate power transmission shaft coupled to the rear end of the first intermediate power transmission shaft of the system. The speed change shaft is interlocked with the second intermediate transmission shaft (■) via the reduction gear (■) and tray, and the PTO shaft (8) is connected to the second intermediate transmission shaft (■). 1r
Shift gear irregularity observed with 4iK spline Shift to the rear and shift gear shaft - [i! The Pte 0 shaft (8) is driven at low speed by meshing with a small diameter gear ring of 1 lil, and the Pteer 0 shaft (8) is driven at low speed by shifting the shift gear @ forward and spline-fitting directly to the rear end of the second intermediate transmission shaft (I). O shaft (81t) P!O system transmission tl that drives at high speed at the same speed as this intermediate transmission shaft ■
There are several configurations.

The auxiliary transmission chamber (9)K also includes an ffi shaft ψ1 concentrically coupled to the rear end of the relay gear, and a bevel pinion shaft ( 2), 1r
The JK Pte 0 shaft 18+ is supported in parallel on the upper FKffi, and the bevel pinion shaft (2) is P t o Wrinkle a4m.
The transmission gear 11 [1l (similar to 11) of the trunk is arranged on the long line of the axis center of the input shaft. Then, a two-stage shift gear (30a) spline-fitted to the bevel pinion shaft (2) is installed.
), (30b) Shift to the t-115 direction and shift gear (s6a) to the small diameter gear fixed to the shift shaft fII.
Shift gear (30b) to the large diameter gear (support) of the gear shift shaft ■ to obtain a low speed by engaging S bud. An auxiliary transmission ip is configured to engage the gears and obtain the Ilb speed.

In addition, a transmission case (81) supporting the transmission shaft for driving the front acoustic wheels + 711" is attached to the outside of the frontage part (80) of the F side of the differential gear case (5), and a transmission case (81) is attached to the transmission shaft (7) by a spline. The mounted shift gear (82) is pushed into the differential gear case +51 from the opening (80).Also, the fixed gear (82) is inserted into the bevel pinion shaft (2), which is the final gear shift shaft.
A free rotating gear (84) meshing with 3) is supported by the PTO shaft +8), and a gear (85) is integrated with this gear (84).
The shift gear (82) is engaged and disengaged freely, and by operating this shift gear (82), switching between the full wheel section 1IJL and the rear wheel section 1111J running light is performed. In the figure, (86) is a shaft cover for the transmission shaft (87) to the front wheel differential transmission. In addition, for models that only have rear wheel drive, the partition case (8
Instead of step 1), close the opening (80) with a cover.

The intermediate image chamber 1111J tAIK is equipped with a mechanism for switching forward/backward f switching using a hydraulic clutch system, and the details thereof will be explained next.

The front end of the input shaft of the traveling system and the rear end of the main clutch shaft (to), which is disconnected once after the main clutch tsat, are inserted into this intermediate transmission chamber, and the intermediate transmission chamber (5) is inserted into the intermediate transmission chamber. ) Upper F is equipped with a multi-disc hydraulic clutch (to), an intermediate transmission shaft (to) equipped with an ordinary clutch (to), and (to) is located behind the main clutch housing* (
2m) and a bracket attached to this. The main clutch shaft (2) and the running system input muu are connected to each other, and the upper intermediate transmission shaft (to) and the transmission shaft +97 of the upper speed mechanism U are connected to the intermediate transmission shaft at position F ( To) and P! O-type Wil Intermediate Densuke Densuke and UII are each deployed in a comrade state.

The problem with the upper hydraulic clutch is that by shifting the piston fixed in the drive drum fixed to the intermediate transmission shaft 11 to the right using pressure oil, the drive drum and shaft OIK are loosely fitted. jI that was interposed between the support drum and the
The friction plates -..., (45) - are brought into pressure contact to transmit the separation IIwJ force between both drums, -, and by releasing the hydraulic pressure to the piston -, the piston +421 is moved to the left by the internal spring (46). The gear (47) fixed to the drive drum track is configured to release the transmission of friction force by restoring the gear to the main clutch shaft (47).
The gear (48) of the holder is engaged with the shaft end of the holder.

A gear (49) integrally formed on the passive drum is connected to the input shaft (7) of the traveling system via a wide idle gear (51) freely rotatably supported via a separate spindle (50) in the intermediate transmission chamber. ) is engaged and retarded by a gear (52) fixed to the shaft end. Similarly to the hydraulic clutch (to), the F-position hydraulic clutch includes a driving drum (53), a passive drum (54), a piston (55), a friction plate (56), etc.
, (57)...and the return spring (58), the gear attached to the moving drum (53)
59) is engaged with the main clutch shaft gear (48), and a gear (60) formed on the receiving drum (64) is directly engaged with the traveling system human power shaft gear (52).

The F-position hydraulic clutch is used for forward transmission (VJ), and the upper hydraulic clutch is used for reverse rotation (VJ) transmission.
The gears (48) and (52) have the same diameter, and the gears (47), (49), (69) &
and (60) are set to have the same diameter, so that the input shaft ul is driven in forward and reverse directions at the same speed as the main clutch shaft (to).

Also, the following end of the intermediate transmission shaft (to) at position F is stationary 41i1)
The first intermediate transmission shaft (IIIK coupling) is connected to the Pte 0 series, and has both hydraulic latches.

The power is transmitted without any curved bullets when turning on or off.

Both hydraulic clutches (11, pressure oil supply and oil drainage to the insects are connected to each intermediate transmission shaft (to), 31 internal oil passages (61), (62)
), and each axis (to).

The main clutch (rotary join °) (63), (64) is installed in the firing part (m) to Fl.

Then, each rotary join 1- (63), (64
) and a control valve (65) mounted on the top of the main clutch housing (21) are connected via connection blocks (66), (67) having oil passages inside.

Further, the control valve (65) is of a rotary type, and its operation arm (68) is connected to the control knob (69).
) is linked with a release wire (71) to a forward/reverse switching lever (70) provided near the main body.

As is clear from the above configuration, this transmission structure includes a hydraulic clutch-type forward/reverse switching mechanism operated by a switching lever (70), a main gear shift lever (72) K, and a 4-speed shift mode. The main transmission mechanism and the 21 auxiliary transmission mechanisms, which can be shifted in two stages using the auxiliary transmission lever (not shown), are arranged in series, so it is possible to shift the front m 81R and the forward 8 throw with the same transmission ratio. be.

As explained above, the tractor VJ Seizo according to the present invention has a main clutch (F), an intermediate transmission gearbox, a traveling system main transmission chamber IBI, and a P〒0 series wrinkle 4 gearbox at the rear of the engine (1). 1
The drive system main transmission chamber (input shaft for BI) is arranged in order from the front toward one side, and the drive system main transmission chamber (input shaft for BI) is located above this. f transportation (9
), the PTO system intermediate shaft moving shaft 1 located above is supported almost in parallel, and the P'l'0 system transfer chamber 1c+ has an immersed extension shaft of the main transmission fluid communication shaft (9). above, the PTO thread intermediate transmission shaft (IIIK gear interlocked l!i shaft transport 1, and the P!o shaft located above it)
81t JI! A sub-transmission chamber (2) is supported parallel to the sub-transmission chamber (2) and concentrically connected to the main transmission transmission shaft (9).
1 transmission shaft 31), a bevel pinion shaft (2) located above the gearbox and linked to the differential IglJ transmission ll@, and a bevel pinion shaft (2) located below the P'l'O shaft (8). part t
〆I is supported in parallel, and the intermediate transfer basis is the intermediate transfer basis.
Intermediate transmission shafts 131, each having a gear retardation of 1J, are connected to the main clutch shaft (end) inserted into the lO depth (4). Installed in parallel on the top of the Cat, each of those shafts (to) and 111 has a multi-disc hydraulic clutch!
, is fully equipped with its output St - gear retardation is applied to the running thread input shaft, and the main clutch shaft (to), running thread input shaft (to) 21 PTO system transmission unit uv, bevel binion - ( 2) ty - arranged on a straight line, and the upper intermediate transmission shaft (to) of the intermediate transmission base and the main transmission phase change transmission (
9) tfl- arranged in a straight line, and connect the Pto system intermediate transmission shaft autt to the intermediate transmission shaft (to) below the intermediate transmission chamber ^.
g - are connected concentrically, and are arranged in a straight line with the PTO system intermediate shaft moving shaft l and the PTO shaft 18) t, ar g-, and the P2O axis (8) moves the differential excitation variable exit @ to the true speed. The main transmission chamber (B
l, Pro system bowl speed chamber (C), and traveling system subhi-dori N (to)
are constructed into a transmission violet having three common axes t-*. - Psychokinesis (Ao, even if these are divided into front and back cases), if you try to make it self-supporting by machining the bearing capital on the wall of each case and all numerical control of the assembly. Processing can be performed using the same control values, which is extremely effective in making parts processing and assembly more self-help.

[Brief explanation of drawings]

Fig. 1 illustrates an embodiment of the agricultural tractor according to the present invention, and Fig. 1 shows an outline of the entire partition structure.
The top view and wpJz diagram are the slope side view showing the first half of the transmission structure, and FIG. 3 is the cross-section view showing the second half of the transmission structure. ill...=...Engine, +91-...Ikusaka Hayaya's IL style axis, ・ul...Input shaft, U
υ...P? O-thread intermediate transmission shaft, 11 staves...
...P'l'O@: General gear shift shaft, 181-...-
P'r O axis. ＠・・・・・・Sub & speed change shaft, S--- Difference #
Transmission, (support)...Bevel pinion shaft, (
To)...Main clutch shaft, ・S 轡...：...Su...Hydraulic clutch, (To), cII----Ichichuunden ・Front shaft, prisoner... ...Intermediate Book #Room, 1B)
・・・・・・Main variable range wealth, inhibition ・・・・PTO transmission chamber, (2)・・・Sub-transmission chamber, (2)・・・Difference ・Whr speed blockage.・10 Agent Patent Attorney Osamu Kitamura

Claims (1)

[Claims] At the rear of the engine (11), the main clutch M (3), the intermediate transmission source, the main transmission chamber for the traveling system 187. The Pro system transformation 111
cJ driving system auxiliary transmission chamber (b), and differential JIlIJk transmission chamber (
3) are arranged randomly from the front to the rear. Ring Qυt
The Pro system transmission chamber is supported in parallel with the rear extended shaft portion of the main wrinkle operating transmission shaft (9), and the PTO system intermediate transmission front shaft tulK gear is supported on the F side thereof. #, and further supports the PTO shaft (8) located on the F side in parallel to the above l1I4Rj111Kall+I
lC is the above-mentioned sub-t!i general tfi111il (i?n1 sono-F side 8
The bevel pinion shaft (2
), the PTO@(81) located on the F side is supported in parallel with the main clutch shaft (to), which is inserted into the intermediate transmission [IAl], and Gear-coupled intermediate transmission shafts (to) are arranged vertically in parallel, and each of these shafts (to) is equipped with a multi-disc hydraulic clutch (to). The drive system input shaft u1 shown in S is gear-retarded, and the main clutch shaft (to)
, the running light system input shaft t11jl, and the Pte0 series transformation uIJ
and the bevel pinion shaft ClatJtg - arranged on the straight line, and the intermediate transmission shaft above the intermediate transmission vJ chamber 4 (
(to) and main variable operation (9) tmel - arranged in a straight line,
The above-mentioned P!
0 series medium system intermediate shaft moving axis l) FA is connected to the warehouse Ill concentrically, and the Pro system middle system intermediate shaft moving axis U and Pte 0 axis (8)
)III- A front structure of an agricultural tractor, characterized in that the PTO@181 is arranged in a straight line and protrudes rearward through the differential chamber IEI'i J[t.