JPS61271123A - Driving transmission - Google Patents

Abstract

PURPOSE:To aim at simplification in the structure of a transmission, by securing a four-step forward driving state with a combination of two gear-shifting parts being directly connected and free of speed selection to high and low in two steps, while installing a backward driving clutch in the first gear-shifting part and the second gear-shifting part each in the state that the former is in series and the latter is in parallel, respectively. CONSTITUTION:An engine 1 and a rear-wheel differential gear mechanism 3 being internally installed in a rear part of the transmission connectedly installed in this engine are interlocked with each other via a driving main transmission 4 and both driving first and second subtransmissions 5 and 6. Here, the main transmission 4 is made up of installing both first and second gear-shifting parts 33 and 34 capable of operating speed selection to high and low in two steps with operation of each pair of clutches 18, 23 and 29, 32 in series. And, the second gear-shifting part 34 is made to be free of operation in a drive-off state, and a backward driving clutch 40 is installed in this gear-shifting part 34 in a state of being in parallel. In addition, the clutch 40 is set up in the first gear- shifting part 33 in the state that it comes in series.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a one-speed shift section that can be freely switched to two high and low speed stages, and a one-speed shift section that can be freely switched to two high and low speed stages! The present invention relates to a driving transmission configured to connect two transmission sections in series and to obtain a four-speed forward transmission state by the combination of the two transmission sections.

[Conventional technology]

In the above-mentioned traveling transmission, there are conventionally known transmissions as shown in FIG. 7, which are capable of switching forward and backward speeds and performing reverse speed changes using the transmission section.

In other words, 4! The J1 transmission section (to), %tl'12 transmission section (to), and the front/rear shift section (support) are connected in series. In addition, (1) shown in FIG. 7 is an engine, a hammer is a clutch, and (Incorporated) is a traveling device. and, (
33m) and (34m) are high-speed transmission clutches,
(33b) and (34b) are low-speed transmission clutches.

Conventional transmissions have disadvantages such as first order.

[Problem that the invention seeks to solve]

In other words, by connecting the two transmission parts (to), (Foundation), and the forward/reverse power changing part in series, the forward/reverse power changing part can be kept in the transmission state both when moving forward and when going backwards. Next, it is necessary to provide two sets of clutches 1, a forward transmission clutch (52m) and a reverse transmission clutch (52b), in the forward/reverse power switching section (end). The configuration for changing the forward and backward power was complicated.

SUMMARY OF THE INVENTION An object of the present invention is to modify the vehicle so that both forward and backward switching and reverse gearing using the transmission section can be performed while simplifying the structure.

[Means for solving problems]

The present invention is characterized in that, in the above-mentioned driving transmission, the second transmission section is a transmission section that can be operated to disengage the VJ transmission state, and the reverse transmission clutch is arranged in parallel with the second transmission section. The first transmission section is connected in series to the first transmission section in the state of the transmission, and its functions and effects are as follows.

[For production]

When the second transmission section is in the transmission state and the reverse transmission clutch is disengaged, the forward power is transmitted through the wJ1 transmission section and the second transmission section, and the forward power is transmitted to the second transmission section. When the transmission is disengaged and the reverse transmission clutch is engaged, the transmission is transmitted by the first transmission section and the reverse transmission clutch bypassing the second transmission section, and the reverse transmission is performed by the reverse transmission clutch. As soon as the power is transmitted,
This reverse transmission speed changes by changing the first transmission section. That is, even if a forward transmission clutch is not provided, forward and backward power can be changed by simply providing a reverse transmission clutch, and the 'tJ1 transmission section becomes a transmission section for reverse transmission.

〔Effect of the invention〕

It is advantageous in that both forward and backward power change and reverse speed change can be performed using the first transmission section, so the structure can be simplified so that only one set of latches is required for one forward and forward power change, and it is inexpensive. Now you can get it.

〔Example〕

As shown in Fig. 1, a main transmission (4) for driving interlocks an engine (1) and a rear wheel differential mechanism (3) installed in the rear of a transmission gear (2) connected to the engine (1). , 4!11 auxiliary transmission for driving (6)
and a second sub-transmission for traveling (6), and
A first mechanism for interlocking the engine (凰) and a power take-off shaft (7) attached to the rear of the mission gate (2).
Rotating shaft (8), hydraulic clutch (9) and second rotating shaft αo
), and an IN3 rotating shaft (to) that interlocks the input shaft (b) of the differential mechanism (3) and the nine front wheel transmission shaft (6) attached to the front part of the mission gate (2), and hydraulic pressure. Each of the clutches a4) is installed in the transmission r-s(2) to constitute a transmission mechanism for a traveling device and a connecting work device in an agricultural tractor.

The main transmission for traveling (4) is constructed as shown in FIGS. 1 and 2.

That is, between the input cylinder shaft (to) fitted externally to the first rotating shaft (8) so as to be relatively rotatable, and the first gear (to) attached to the input cylinder shaft (to) so as to be relatively rotatable. , a multi-disc first friction clutch configured to be turned on and off by a hydraulic piston αη, and a second gear α and a third gear clutch rotatable as a unit. Between the first transmission simple shaft (■) fitted externally to the first rotary shaft (8) so as to be relatively rotatable, and the input cylinder shaft (to), there is a multi-plate type shaft which is operated by a hydraulic piston device. It is equipped with two friction clutches. Then, a fourth gear is engaged with the first gear (A) and the second gear α value separately.
Between the second transmission simple shaft @ which is fitted externally to the output shaft (to) so as to be relatively rotatable with the gear and the fifth gear (2!il' being integrally rotatable) and the output shaft ■, A multi-disk type third friction clutch (■) configured to be engaged and cut by a hydraulic piston (support) is provided, and the third gear (E)
It is installed so that it can rotate relative to the output shaft ■ while being engaged with the gear 7'2:, *1 is inserted between the gear ■ and the output shaft □□□ with the 1 hydraulic piston (9)! A multi-plate type 4 that is configured to operate 7J! Throw in the J4 friction clutch @. Accordingly, the first transmission section C is operated to switch between two high and low speed stages by operating the pair of clutches (to) and Q3.
at, the second gear shift 1 (to) is configured such that the pair of clutch devices 9 are operated to switch between two high and low speed stages, and the second gear shift 1 (to) is operated suddenly in the transmission state; The first transmission section (to) and the second transmission section (to) are interlocked in series as shown in FIG. be.

A seventh shaft rotatably attached to the first transmission shaft
As shown in Fig. 3, the 8th gear for reverse rotation is attached to the gear (to).
4 linked via ! A J9 gear is attached to the output shaft (■) so as to be relatively rotatable, and a 10th gear is attached to the output shaft (■).
The ninth clutch gear 31 is attached so as to be integrally rotatable and slidable through the gear @, so that it can be engaged with and disengaged from the teeth (37a) of the ninth gear (9) by sliding operation on the tenth gear (to). As shown in FIG. 4, a reverse transmission clutch (2) is connected in series to the first transmission section K in parallel with the second transmission section K.

In other words, in the I7I state, the second transmission section
The 9th
In order to enable relative rotation between the gear (support) and the output shaft, and in the engaged state, the output from the first transmission section (toward) is converted to the rotation direction for reverse, and the wI2 transmission section (toward) is )
This is done so that the signal is bypassed and transmitted to the output shaft (2) on the downstream side.

For details, see Reverse transmission clutch (41) t iU Sushi Danger 1! A (/c, 1st clutch (to) and 4th clutch (to) enter 4
! If you operate J2 clutch and 3rd clutch @t-grace, you will be in the first forward speed, and 4!12 clutch (2) and #! , 4 clutch (2) is engaged and the 1st clutch (to) and 4! P! J3 clutch■
If you operate with force, it will go to 2nd forward speed. 91 When you engage the 1st clutch (to) and 3rd clutch @, and operate the 2nd clutch (to) and 4th clutch (to) by GJ, you will go to 3rd forward speed. 9. When the second clutch (c) and the third clutch are engaged, and the first clutch (to) and the fourth clutch (■) are operated to disengage, the fourth forward speed is achieved.〇And, the reverse transmission clutch (41) When the second clutch (41') is engaged and the second clutch (41') is engaged, when the second clutch (to) is engaged and the second clutch (to) is disengaged, the gear becomes reverse first gear. When the first clutch is pressed down and the second clutch is turned on, the second reverse speed is set.

The first sub-transmission (5) switches the output from the main transmission (4) into two high and low speed stages. In detail, a shift gear ta31t is attached to the output shaft (2) so as to be able to rotate and slide integrally with the output shaft (2), and a gear (441) that rotates integrally with the output shaft (2) becomes a high-speed transmission type when engaged with the gear (441). The shift gear (43) is interlocked with the gear mechanism (43) and is attached to the output shaft (43) so as to be relatively rotatable in good condition.
f: It is structured so that when it is engaged, it becomes a low speed transmission state.

Said! The second sub-transmission (6) transfers the output from the first sub-transmission (6) to the differential mechanism (3).
) and front wheel transmission mechanism (2) which switches between a non-deceleration transmission state and a super-deceleration transmission state. and,
In detail, the gear (41DK) that rotates and slides integrally with the input shaft (B) is attached to the gear (41DK), which rotates integrally with the output shaft. When the shift gear (4η) is engaged with the gear ω, which is interlocked via a mechanism ti and is relatively rotatably attached to the input shaft (B) in good condition, a super-deceleration transmission state is established.

[Another example]

In the configuration of the reverse transmission front clutch (41i), as shown in FIG. As shown in the sixth factor, the second transmission section (to) is connected to the first transmission section (
(To) is placed on the upper side, and the reverse transmission clutch (A) transfers the input from the engine (1) to the second transmission section (To).
It may also be implemented in such a manner that the signal is transmitted to the first transmission section (to) by bypassing the transmission section.

Further, the first transmission section (to) and the second transmission section C141 may be changed to a configuration in which the speeds are changed by sliding operation of a shift gear.

[Brief explanation of the drawing]

The drawings show an embodiment of the driving transmission according to the present invention, and FIG. 1 is a transmission system diagram, FIG. 2 is a sectional view of the main transmission for driving, and FIG. 3 is a sectional view taken along the line T in FIG. 2. , FIG. 4 is a block diagram of the transmission system, FIG. 5 is a sectional view of a reverse transmission clutch according to another implementation, and FIG. 6 is a block diagram of another implementation of the main transmission. FIG. 7 is a block diagram of a conventional transmission. (to), 田, ■, (to)...Hydraulic clutch, money...1st transmission section, (to)...2nd transmission section, 2...・・・2″・75.A for reverse transmission
Ayu, □蓚M4Figure 7

Claims (1)

[Scope of Claims] [1] A first transmission section (33) that can be switched between two high and low speed stages and a second transmission section (34) that can be switched between two high and low speed stages are connected in series, and A driving transmission configured to obtain a four-speed forward transmission state by a combination of speed change portions (33) and (34), wherein the second
The transmission section (34) is a transmission section that can be freely operated to a transmission disengaged state, and the reverse transmission clutch (40) is connected to the second transmission section (34).
4) A driving transmission connected in series to the first transmission section (33) in parallel with the first transmission section (33). [2] The first transmission section (33) and the second transmission section (34)
The traveling transmission according to claim 1, wherein the transmission is a transmission section that is switched by operating a pair of hydraulic clutches (18, 23 or 29, 32). [3] Claim No. 1, wherein the reverse transmission clutch (40) is a clutch that transmits the output from the first transmission section (33) to a downstream side of the second transmission section (34).
or [2].