JP2706869B2 - Vehicle transmission mechanism assembly method - Google Patents

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 transmission mechanism for an industrial vehicle such as a construction vehicle, a transportation vehicle, an agriculture and forestry vehicle, etc., having a center case interposed between a clutch housing and a transmission case. .

[0002]

2. Description of the Related Art A conventional center case interposed between a clutch housing and a transmission case has front and rear support walls, and is open only on one side toward the upper side of the center case. Gears, bearings and the like are opened from the upper openings. In many cases, the shafts were inserted from the front and rear holes and assembled.

[0003]

As in the case of a conventional center case, a support wall is provided at the front and rear ends, and only one surface is open upward of the center case. In the method of inserting and assembling by inserting from the front and rear holes, insert one shaft or transmission rail, insert the gears and bearings into them, and attach them to the end of the shaft or the holes in the rear partition wall. However, the transmission has a large number of shafts, the gears and the bearings are both heavy, and it is extremely difficult to assemble them, and it takes a long time to assemble them.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a vehicle having a center case having front and rear ends opened between a clutch housing and a transmission case, and a plurality of support plates mounted on an inner periphery of the center case. , A plurality of sets of mounting seats or partitions are protruded at intervals in the front-rear direction, and a transmission mechanism such as a transmission shaft and an associated gear and bearing are provided on an end-side support plate and a transmission shift rail longer than the transmission shaft. After assembling, in this state in the hole of the back mounting seat or partition,
The front end of the transmission shift rail is inserted and pushed forward as a guide, and then the transmission shaft or a bearing mounted on the front end thereof is inserted into the mounting seat or another hole of the partition wall. Solved the problem.

[0005]

When the speed change mechanism is mounted on the center case having the front and rear ends opened between the clutch housing and the transmission case, the ends of the speed change shaft and the speed change rail are inserted into holes of the outer mounting plate, and the speed change shaft is inserted into the hole. When the gears and bearings attached to it are mounted and inserted from the end of the center case in this assembled state, the shift shift rails are longer than the shift shaft, so their tips are supported before the shaft. When the assembly is further pushed in in that state because it is inserted into the corresponding hole of the plate or partition, the assembly moves while being supported by the support plate or partition via the shift shift rail, and the tip or bearing of the shift shaft is Is inserted into the corresponding hole of the support plate or the partition wall involved in the above. Thereafter, an adapter or the like is mounted on the shift rail as necessary.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. In a transmission for transmitting the power of an engine of an agricultural tractor to wheels, a center case 3 interposed between a clutch housing 1 and a transmission case 2 has a front side. The rear and the rear are largely open except for the surrounding mounting seat, a mounting seat (not shown) for mounting the support plate 5 is protrudingly provided on the inner periphery of the front part, and the partition wall 6 is integrally formed at the rear part. Two sets of mounting seats 10... 11 for mounting the support plates 7 and 8 are provided at intervals on the inner periphery of the rear intermediate portion,
The second (rear) set of mounting seats 10 from the rear,
The length is longer than the pair of mounting seats 11 on the rear end side, or the phases in the circumferential direction are different from each other, and the support plate 7 on the back side is inside the mounting seats 11. Or the outer periphery of a portion corresponding to the mounting seat 11 is formed in a concave portion, and the mounting seats 10..., 11. By drilling a mounting hole from the rear, the mounting seat 10 on the back side can be easily processed without obstructing the mounting seats 11 on the front side.

Hereinafter, the assembling process will be described. On the other hand, the transmission shaft 12 is attached to the support plate 5 outside the center case 3.
Assembling the main transmission shaft 13 (with a spline joint 13a) and the PTO transmission shaft 14 (with a spline joint 14a) and their associated gears, bearings, etc.
Furthermore, the main transmission shift rails 16 and 16 on which the main transmission shifters 15a, 15b... Are mounted on one side and the PTO transmission shifters 17a, 17b. When the rails 18, 18 are assembled and inserted through the front opening of the center case 3, the main transmission shift rails 16, 16 and the front half of the PTO transmission shift rails 18, 18 are connected to the transmission shaft 12, the main transmission shaft 13 and the PTO transmission shaft 14, so that the transmission shaft 12
Are inserted into corresponding holes of the partition wall 6 of the center case 3 ahead of the bearings mounted on the rear portion of the shift shift rail. The entire assembly can be smoothly pushed in while being supported on the left and right almost equally by the 16, 16, 18, and 18. When the tip of the transmission shaft 12 or the like approaches the partition wall 6, the corresponding holes are provided in the above-mentioned supporting state. , And the bearing mounted on the tip of the shaft can be fitted. Thereafter, the support plate 5 is screwed onto the mounting seat on the front surface of the center case 3 to thereby perform the main transmission and the PTO transmission. Complete assembly of the part. In addition, the joint 18a connected to the tip of the PTO shift shift rails 18, 18 is inserted and pinned from the opening 19a of the center case 3 in a state where the relief valve 19 is not attached.

On the other hand, outside the center case 3, a shuttle drive shaft 20 and necessary gears, bearings and the like are assembled to a support plate 7 and a shuttle transmission shaft 21, respectively, and further, a shuttle transmission shifter 22 is mounted with a shuttle transmission shifter 22. Rail 23,
In a state where the back shaft is assembled, the shuttle drive shaft is inserted into the spline joint 13a or the like from the opening at the rear of the center case 3 toward the mounting seats 10. The assembly of the shuttle unit is completed by screwing the support plate 7 to the. When the support plate 7 is moved axially through an opening at the rear of the center case 3 to assemble the support plate 7, the mounting seats 10.
Longer, or the phases are different in the circumferential direction, and the support plate 7 is designed to pass through the inside of the mounting seat 11. ,
There is no interference with the mounting seat 11.

Further, outside the center case 3, the support plate 8
The sub-transmission shaft 25 and the first half 26a of the counter shaft 26 are assembled with their associated gears, bearings 27 and the like, and the sub-transmission shift rail 22 equipped with the sub-transmission shifter 28 is assembled.
The support plate 8 is screwed onto the mounting seats 11 to complete the assembly of the subtransmission portion. When the support plate 8 is moved axially through an opening at the rear of the center case 3 to assemble the support plate 8, the rear surface of the center case 3 is large because the support plate 8 and the components attached thereto are connected to the transmission case 2. There is no interference because it is open. When the mounting of the support plates 5, 7, 8 is completed in this way, the front ends of the PTO shift rails 18, 18 are connected to the joint 18a, and the inner openings of the PTO shift shift rails 18, 31 without the caps 30, 31 mounted. Insert the adapters 32, 33,... Into the shift rail. 35 is a front wheel drive shaft.

As described above, outside the center case 3,
Main transmission, PTO transmission, shuttle transmission and sub transmission main transmission parts can be easily assembled to the supporting plates 5, 7, 8 and in this assembled state, the PTO transmission shift rail 1
8, 18 and the main transmission shift rails 16, 16 can be easily mounted on the center case 3 while being heavy. Note that the support plate 5 may be assembled after the other support plates.

[0011]

According to the present invention, a plurality of support plates are mounted on the inner periphery of the center case 3 in a vehicle having a center case 3 having front and rear ends opened between the clutch housing 1 and the transmission case 2. , A plurality of sets of mounting seats or partitions are protruded at an interval in the front-rear direction, and a transmission mechanism such as a transmission shaft and associated gears and bearings and a plurality of transmissions longer than the transmission shaft are provided on an end-side support plate. After assembling the shift rail, in this state a hole in the back support plate or partition,
The leading end of the shift shift rail is inserted in advance and pushed in as a guide, and then the transmission shaft or a bearing mounted on the leading end thereof is fitted into the other hole of the support plate or the partition wall. The transmission shaft, the transmission shaft, the transmission shift rail, and the components associated therewith can be easily assembled to the support plate outside the center case 3, and the assembled product can be mounted on the transmission shift rail by the guide means and the support means. And
Although it is extremely heavy, it can be easily and quickly assembled to the center case 3.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a transmission for an agricultural tractor.

FIG. 2 is an expanded sectional view of a center case.

FIG. 3 is a front view of a center case.

[Explanation of symbols]

 Reference Signs List 3 Center case 5 Support plate 6 Partition wall 7 Support plate 8 Support plate 10 Mounting seat 11 Mounting seat 12 Transmission shaft 13 Main transmission shaft 14 PTO transmission shaft 16 Main transmission shift rail 18 PTO transmission shift rail 20 Shuttle drive shaft 21 Shuttle transmission shaft 25 Sub transmission shaft 26 Sub transmission driven shaft

Claims (1)

(57) [Claims] 1. A center case 3 having front and rear ends opened between a clutch housing 1 and a transmission case 2.
A plurality of sets of mounting seats or partition walls 6 for mounting a plurality of support plates are provided on the inner periphery of the center case 3 at intervals on the inner periphery of the center case 3 to support the end portion. After assembling the transmission shaft and transmission mechanisms such as gears and bearings and a plurality of transmission shift rails longer than the transmission shaft on the plate, in this state, the transmission gear is inserted into the hole of the rear mounting seat or partition wall. The front end of the rail is inserted in advance and pushed in as a guide, and then the transmission shaft or a bearing mounted on the front end thereof is inserted into the mounting seat or another hole of the partition wall 6. A method for assembling a vehicle transmission mechanism.