JPH05231503A - Method for mounting center case of vehicle - Google Patents

Abstract

PURPOSE:To facilitate assembling work by allowing a plurality of transmissions to move and pass through a center case without interfering with any of mounting seats and boss portions inside the center case in inserting the plurality of transmissions into the center case from the front and rear ends of the center case and mounting them in the case in sequence. CONSTITUTION:In a vehicle in which a center case 1 opened at front and rear ends is interposed between a clutch housing 35 and a transmission case 30, plural sets of mounting seats on which to mount a plurality of support plates 2-4 are provided protrusively on the inner periphery of the center case 1 in such a manner that they are longitudinally spaced from one another and that those made in pairs deep in the case are made longer than those made in pairs near the end portion of the case or that the former differs in circumferential phase with the latter, and the support plate 3 located at the depth of the case is so formed to pass between those mounting seats which are located near the end portion. After transmissions each comprising gears, shafts and bearings and the like are mounted on the respective support plates 2-4, they are inserted into the center case in sequence from that located deep and the support plates are sequentially mounted on the corresponding mounting seats.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a center case for an industrial vehicle such as a construction vehicle, a transportation vehicle, and an agricultural and forestry vehicle having a center case interposed between a clutch housing and a transmission case. .

[0002]

2. Description of the Related Art A conventional center case, which is interposed between a clutch housing and a transmission case, has support walls at front and rear ends, and only one surface is open toward the upper side of the center case. Therefore, there were many methods to assemble the shafts by inserting them from the front and rear holes.

[0003]

As in the conventional center case, it has supporting walls at the front and rear ends, and only one surface is open toward the upper side of the center case. Gears, bearings, etc. are opened from the upper opening, and shafts are With the method of inserting by inserting from the front and rear holes, it is not always possible to process the mounting seat and the support hole without the machining tool interfering with any of the mounting seat and the boss from the holes of the front and rear support walls. Instead, it was sometimes necessary to use a special tool from the upper opening. Also, when assembling, the gears, bearings, etc. are held one by one from the upper opening, while the shafts are inserted from the front and rear holes and fitted into the gears, bearings, etc. The work was complicated for both assembly.

[0004]

According to the present invention, in a vehicle having a center case having front and rear ends opened between a clutch housing and a transmission case, a plurality of support plates are mounted on the inner circumference of the center case. For this purpose, a plurality of sets of mounting seats should be spaced forward and backward, and those that form the set on the back side should be longer than those that form the set on the end side, or they should be projected with different mutual circumferential phases. , The back side support plate has a shape that passes between the mounting seats on the end side, and after assembling transmissions such as gears, shafts, and bearings to each support plate,
In this state, the above-mentioned problem is solved by sequentially inserting the support plates into the corresponding mounting seats from the rear side transmission device in order from the rear side transmission device.

[0005]

In a vehicle having a center case having front and rear ends opened between the clutch housing and the transmission case, the center case is attached to a plurality of sets of mounting seats provided at front and rear intervals on the inner circumference of the center case. With the transmissions such as gears, shafts and bearings already assembled to the support plate outside the front, insert the support plates into the center case in order from the front and rear openings through the transmissions on the inner side. The seats are sequentially assembled to complete the assembly of the transmission to the center case.

[0006]

An embodiment of the present invention will be described with reference to the drawings. In a transmission device for transmitting power of an engine of an agricultural tractor to wheels, a center case 1 interposed between a clutch housing and a transmission case has front and rear parts. Except for the surrounding mounting seats, a large opening is provided, and a mounting seat (not shown) for mounting the support plate 2 is projectingly provided on the inner circumference of the front part, and the partition wall 1a is integrally formed at the rear part, and further inside the intermediate part. Two sets of mounting seats 1b and 1c for mounting the support plates 3 and 4 are provided on the circumference with a projection, and the mounting seat 1b forms the second (back side) set from the rear. Are made longer than the mounting seats 1c that form a pair on the rear end side, or the phases in the circumferential direction are different from each other, and the support plate 3 on the back side is mounted on the mounting seats 1c from the rear end. ..Small enough to pass inside An outer periphery of a portion corresponding to each mounting seat 1c ··· is formed in a concave portion, for mounting from the front for the partition wall 1a, and from the rear for the mounting seats 1b ···, 1c ··· behind the partition wall 1a. When machining the mounting seat 1b on the back side by making a hole in the mounting seat 1c, the mounting seat 1c on the front side is processed.
.. does not interfere with the processing tool.

The assembly process will be described below. On the other hand, outside the center case 1, the transmission shaft 6, the main transmission shaft 7 with the joint 7a and the PTO transmission shaft 8 on the support plate 2, and the gears associated therewith, The main shift shift rails 17, 17 to which the bearings and the like are assembled and the main shifters 25a, 25b are mounted, and the PTO shifters 26a, 26b.
With the PTO gear shift rails 19 attached to the main gear shift rails 17 and 17 with the joint 17a inserted into the holes in the partition wall 1a of the center case 1 from the front opening of the center case 1. Then, the front end portion of the PTO transmission shift rail 19 is inserted as a guide while being advanced, and the support plate 2 is screwed to the mounting seat on the front surface of the center case 1 to complete the main transmission and the assembly of the PTO transmission portion.

On the other hand, outside the center case 1, the shuttle drive shaft 10 and the shuttle gear shift shaft 11 are fitted with necessary gears, bearings, etc. on the support plate 3, and further, the shuttle gear shift shifter is equipped with the shuttle gear shifter 27. Rail 21,
With the back shaft 23 assembled, the center case 1
From the rear opening of the center case 1 mounting seat 1b ·
., And the support plate 3 is screwed to the mounting seat 1b .. When the support plate 3 is to be moved in the axial direction from the rear opening of the center case 1 so as to be assembled, the mounting seats 1b ... Are longer than the mounting seats 1c ... Or have different phases in the circumferential direction. Since the supporting plate 3 passes through the inside of the mounting seats 1c ..., The supporting plate 3 and the parts assembled to it do not interfere with the mounting seats 1c. .

Further, outside the center case 1, the support plate 4 is provided.
A sub-transmission shaft 12 and a gear attached to the front half portion 13a of the counter shaft 13 which is transmitted to the drive pinion shaft,
Assembling the bearings and the like, assembling the auxiliary transmission shift rail 22 with the auxiliary transmission shifter 28 mounted, and screwing the support plate 4 to the mounting seats 1c ... When the support plate 4 is moved in the axial direction from the rear opening of the center case 1 to be assembled, the opening is large so as to be attached to the transmission case 30, so that it does not interfere. When the assembling of the support plates 2, 3 and 4 is completed in this way, a hand is put through the opening portion having the lid 31 and the coupling 32 is used to connect the PTO gear shift rail 1
The front and rear parts of 9, 9 are connected to each other, and the PTO gear shift rails 19, 19 and the main gear shift rail 1 are connected.
At the rear end of 7, 17, the cap 33 and the relief valve 34
With the adapter removed, insert the adapters 16, 18 ...

As described above, the main transmission parts of the main transmission, the PTO transmission, the shuttle transmission and the auxiliary transmission are easily assembled in order from the front and the rear of the center case 1,
Since all are housed in the center case 1, the front clutch housing 35 and the transmission case 3
The structure of 0 can be simplified. The support plate 2 may be mounted after mounting the other mounting plates 3 and 4. Reference numeral 36 is a front wheel drive shaft.

[0011]

According to the present invention, in a vehicle having a center case 1 having front and rear ends opened between the clutch housing 35 and the transmission case 30, a plurality of support plates are mounted on the inner circumference of the center case 1. For this purpose, a plurality of sets of mounting seats should be spaced forward and backward, and those that form the set on the back side should be longer than those that form the set on the end side, or they should be projected with different mutual circumferential phases. , The back side support plate has a shape that passes between the mounting seats on the end side, and after assembling the transmissions such as gears, shafts and bearings to each support plate, in this state, from the back side transmission By sequentially inserting into the center case 1 and assembling the respective support plates into the corresponding mounting seats, the main transmission parts of the main gear shift, PTO gear shift, shuttle gear shift and auxiliary gear shift can be easily carried out from the front and rear of the center case 1. Assembled All while being housed in the center case, was a structure of the front portion of the clutch housing 35 and the rear of the transmission case 30 so can be simplified.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of a transmission device for an agricultural tractor.

FIG. 2 is a developed sectional view of a center case.

FIG. 3 is a rear view of the center case.

FIG. 4 is a front view of a center case.

[Explanation of symbols]

 1 Center case 2 Support plate 3 Support plate 4 Support plate 6 Transmission shaft 7 Main transmission shaft 8 PTO transmission shaft 11 Shuttle transmission shaft 12 Sub transmission shaft 13 Drive pinion shaft

Claims (1)

[Claims] 1. In a vehicle having a center case 1 having front and rear ends opened between a clutch housing 35 and a transmission case 30, a plurality of sets for mounting a plurality of support plates on the inner circumference of the center case 1. The mounting seats of are spaced forward and backward and the ones that form a set on the back side are longer than those that form a set on the end side, or are projected so that their phases in the circumferential direction are different from each other. The support plate is formed to pass through between the mounting seats on the end side, and after the transmissions such as gears, shafts and bearings have been assembled to the support plates, respectively, in this state, the transmissions on the inner side are sequentially arranged from the center case 1. A method of assembling a center case of a vehicle, characterized in that the supporting plates are inserted into the corresponding mounting seats and are sequentially assembled to corresponding mounting seats.