JP2719741B2 - Vehicle transmission case 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 for assembling a transmission case of an industrial vehicle having a transmission case, such as a construction vehicle, a transportation vehicle, and an agricultural and forestry vehicle.

[0002]

2. Description of the Related Art A conventional transmission case has support walls at the front and rear ends, and is open only on one surface facing upwards of the transmission case.
In many cases, the bearings and the like were inserted from the upper opening and the shafts were inserted from the front and rear holes and assembled.

[0003]

As in the case of the conventional transmission case, it has support walls at the front and rear ends, and is open only on one surface facing upward of the transmission case. Gears, bearings, etc. are opened from the upper opening, and the shafts are In the method of inserting and assembling 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 part from the holes in the front and rear support walls In some cases, it was necessary to use a special tool from the upper opening. Also, when assembling, while holding the gears and bearings by hand from the upper opening one by one, the shafts are inserted from the front and rear holes and the gears and bearings are fitted and assembled, so processing, The work was complicated both in the assembly.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a vehicle having a cylindrical transmission case 1 having an open end, wherein a mounting seat for mounting a support plate is provided on the inner periphery of the transmission case 1 in front and rear directions. At the same time, the mounting seats on the back side and the end side, which form a set, are made longer on the back side than the end side or project with a different phase in the circumferential direction, and the support plate on the back side is The shape is such that it passes between the mounting seats on the side, and the gear, shaft,
After assembling the transmissions such as bearings and the like, in this state, the above-mentioned problem is solved by sequentially inserting the transmissions from the opening into the transmission case 1 through the opening and sequentially assembling each support plate to the corresponding mounting seat. Settled.

[0005]

In a vehicle having a cylindrical transmission case 1 with an open end, a gear is provided on a mounting plate provided on the inner periphery of the transmission case 1 at an interval in the front-rear direction. With the transmissions such as shafts and bearings assembled, insert the transmission into the transmission case in order from the transmission at the back of the opening at the end of the transmission case, and assemble each support plate into the corresponding mounting seat in order to transmit power. The assembly of the transmission to the case is completed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In a transmission device for transmitting the power of an engine of an agricultural tractor to wheels, a center case (transmission case) 1 interposed between a clutch housing and a transmission case is provided. The center case 1 is formed in a tubular shape, and the front and rear front and rear ends of the center case 1 are largely opened except for a surrounding mounting seat,
A mounting seat X for mounting the support plate 2 is protruded on the inner periphery of the front part, a partition wall 1a is integrally formed at the rear part, and the support plates 3 and 4 are mounted on the inner periphery of the rear part at an interval. , Two sets of mounting seats 1b,..., 1c,... Protruding from each other, and a mounting seat 1b,. Longer, or the phases in the circumferential direction are different from each other, and the support plate 3 on the back side is made smaller so as to pass through the inside of the mounting seat 1c. The outer periphery of a portion corresponding to the mounting seats 1c is formed in a concave portion, and is used for mounting from the front with respect to the partition 1a, and from the rear with respect to the mounting seats 1b,. When the rear mounting seat 1b is machined by drilling a hole, the front mounting seat 1c is formed.
... does not interfere with the machining tool.

Hereinafter, the assembling process will be described. 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, and the gears associated therewith are mounted on the support plate 2. Bearings and the like are assembled, and the main transmission shift rails 17, 17 and the PTO transmission shifters 26a, 26b are mounted with the main transmission shifters 25a, 25b.
With the PTO shift shift rails 19, 19 attached, the main shift shift rails 17, 17 and the PTO shift shift from the front opening of the center case 1 to each hole of the partition wall 1a of the center case 1. The rails 19, 19 are inserted with leading ends as guides, and the support plate 2 is screwed into the mounting seat X on the front surface of the center case 1 to complete the assembly of the main transmission and the PTO transmission.

On the other hand, outside the center case 1, the shuttle drive shaft 10 and the required gears, bearings and the like are assembled to the support plate 3 and the shuttle transmission shaft 11, respectively, and further the shuttle transmission shifter 27 is mounted. Rail 21,
And the center case 1 with the back shaft 23 attached.
Of the center case 1 is inserted toward the mounting seats 1b,... Of the center case 1, and the support plate 3 is screwed to the mounting seats 1b,. When the support plate 3 is moved axially through an opening at the rear of the center case 1 to assemble the support plate 3, the mounting seats 1b.
.. longer than or different in phase in the circumferential direction, and because the support plate 3 passes through the inside of the mounting seat 1c. The components do not interfere with the mounting seats 1c.

Further, outside the center case 1, the support plate 4
The auxiliary transmission shaft 12, the first half portion 13a of the counter shaft 13 transmitting to the drive pinion shaft, the gears associated therewith,
Bearings and the like are assembled, the sub-shift shift rail 22 to which the sub-shift shifter 28 is attached is assembled, and the support plate 4 is screwed to the mounting seats 1c. When the support plate 4 is axially moved through an opening at the rear of the center case 1 to assemble the support plate 4, the opening does not interfere with the transmission case 30 because the opening is large to be attached to the transmission case 30. When the assembling of the support plates 2, 3, and 4 is completed in this way, the user puts his hand through the opening of the center case 1 to which the lid 31 with the relief valve 34 is attached, and the PTO shift shift rails 19, 19 by the coupling 32. Connect the front and rear of the. In addition, the main transmission shift rail 1
The adapter 18 is inserted into the opening formed in the center case 1 facing the rear ends of the adapters 7 and 17, attached to the adapter 17, and the cap 33 is attached. Further, after assembling the transmission case 30 and the center case 1, the adapter 16 is inserted into the opening formed in the transmission case 30 facing the rear end of the PTO shift shift rails 19, 19, attached to the transmission case 30, and the cap 33 is attached. Attach.

As described above, the main shift transmission parts such as the main shift, the PTO shift, the shuttle shift, and the auxiliary shift include:
Since it is easily assembled sequentially from the front and rear of the center case 1 and all are stored in the center case 1,
The structures of the front clutch housing 35 and the transmission case 30 can be simplified. The support plate 2 may be attached after the other support plates 3 and 4 are attached. 36 is a front wheel drive shaft.

Although the embodiment of the present invention has been described as being applied to the center case of an agricultural tractor, it may be applied to a transmission case such as a transmission case.
Further, the present invention can be applied to assembling a transmission case of an industrial vehicle such as a construction vehicle, a transportation vehicle, and an agricultural and forestry vehicle.

[0012]

According to the present invention, in a vehicle having a cylindrical transmission case 1 having an open end, a mounting seat for mounting a support plate is provided on the inner periphery of the transmission case 1 at an interval in the front-rear direction. The mounting seats on the back side and the end side, which form a pair with it, are provided with the back side longer than the end side or with a different phase in the circumferential direction, and the support plate on the back side is mounted on the end side. After a transmission such as a gear, a shaft, and a bearing is assembled to each support plate, the transmission is inserted into the transmission case 1 from the opening in order from the rear transmission in this state. By sequentially assembling the support plates to the corresponding mounting seats, the main transmission, PTO transmission, or the main transmission transmission parts such as shuttle transmission and auxiliary transmission can be easily assembled and stored in the transmission case from the opening formed in the transmission case. You can now.

[Brief description of the drawings]

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

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

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

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

[Explanation of symbols]

 Reference Signs List 1 center case (transmission case) 1b mounting seat 1c mounting seat X mounting seat 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 auxiliary transmission shaft 13 drive pinion shaft

Claims (1)

(57) [Claims] 1. A vehicle end portion has a cylindrical transmission case 1 which is open, the inner periphery of the transmission case 1, a mounting seat for mounting the support plate, forming a pair with spaced around The mounting seats on the back side and the end side are extended from the end side to the back side or protruded with different phases in the circumferential direction, and the support plate on the back side passes between the mounting seats on the end side. After assembling gears, shafts, bearings and other transmissions on each support plate, in this state, from the opening in order from the transmission on the back side in this state
A method of assembling a transmission case for a vehicle, comprising inserting the support plate into a corresponding mounting seat by inserting the support plate into the transmission case 1 and sequentially mounting the support plates.