JPH11294564A - Transmission and repair method thereof - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To make it possible to take out shafts with various components such as gears mounted on a vehicle while the transmission main body is mounted on the vehicle. A relatively wide opening (30) is provided on at least one side of the transmission that faces in the axial direction, and a cover (31) that covers the opening (30) supports the bearing members (26) of the shafts (14, 9).
By holding the shaft 28, only the shafts 9 and 14 in a state where each element is mounted can be taken out of the vehicle from the transmission case 29A, and the transmission can be easily disassembled, repaired, and replaced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission and a repair method capable of easily replacing and repairing gear elements on a shaft.

[0002]

2. Description of the Related Art Generally, a transmission is, as shown in FIG.
A counter shaft 9 (hereinafter, referred to as a second shaft) equipped with a low gear 1, a high gear 2, a forward gear 3, a reverse gear 4, a low-high switching synchronizing mechanism 5 and a forward / backward switching synchronizing mechanism 6, and a speed gear An input shaft 14 (hereinafter, referred to as a first shaft) on which the gear 10 and the idler gear 11 are mounted is attached to both ends of the shaft so that predetermined gears mesh with each other. Are supported via bearing members 7, 8 and 12, 13. The idler gear 11 of the first shaft 14 is connected to the gear of the output shaft 20 via the idler gear 19a on the idler shaft 19.

In such a transmission, the rotation of the first shaft 14 driven by the engine is transmitted to the second shaft 9 via the low gear 1 or the high gear 2 on the second shaft 9 by the operation of the synchronization mechanism 5. The rotation of the reverse gear 3 is transmitted to the idler gear 11 on the first shaft 14 by the operation of the synchronization mechanism 6, and the output shaft 20 moves backward through the idler gear 19 a on the idler shaft 19 meshed with the idler gear 11. It is driven in the rotation direction. When the rotation of the second shaft 9 is transmitted to the reverse gear 4 by the synchronization mechanism 6, the output shaft 2 is transmitted through the idler gear 19 a on the idler shaft 19 meshed with the forward gear 4.
0 is driven in the forward rotation direction.

In the above-described transmission, the conventional transmission case 17 is mainly composed of a main case 17A having an upper opening 18 closed by a support plate 22 of an operation mechanism 21. The main case 17A includes a bearing member 1 that supports a front end of the first shaft 14 on a front side portion facing the axial direction.
2 and a fitting hole 7a of the bearing member 7 for supporting the front end of the second shaft 9 are formed.
On the rear side of the main case 17A, as shown in FIG.
A fitting hole 13a for the bearing member 13 supporting the rear intermediate portion of the first shaft 14, a fitting hole 8a for the bearing member 8 supporting the rear end of the second shaft 9, A shaft hole 23 that supports the end and a fitting hole 24a of a bearing member 24 that supports the rear end of the output shaft 20 are formed.

In the transmission having such a structure, the first shaft 14 with the main element such as the low gear 1 and the main element such as the speed gear 10 mounted on the upper opening 18 in the open state.
And the second shaft 9 are assembled in the main case 17A, and the bearing members 7, 8, 12, 13 are attached.
The assembly of the transmission has been simplified. This bearing member 7,
Each of the fitting holes 7a, 8a before mounting 8, 12, 13
Reference numerals 12a and 13a are relief spaces at the ends of the shaft with the main element mounted in the axial direction of the transmission case.

The fitting holes 7a, 12a of the bearing members 7, 12 of the first shaft 14 and the second shaft 9, respectively.
Is closed by the front case 17B, and the bearing member 8,
The 13 fitting holes 8a, 13a are closed by the rear case 17C. The shaft hole 23 of the idler shaft 19 is closed by the same rear case 17C as the fitting holes 8a and 13a,
The fitting hole 24a of the output shaft 20 is closed by another rear case 17D.

Further, when it is necessary to disassemble, replace, or repair the internal components of the transmission after the vehicle is mounted on a vehicle at a repair shop or the like, a tool is used through the upper opening 18.

[0008]

In a conventional transmission, when assembling and disassembling, a gear, a synchro, etc. are put in and out of a case in a single item state. In this,
The gears and the like were easily damaged, and were not sufficient in terms of workability and quality assurance. Therefore, at a repair shop or the like, when the transmission needs to be detached from the vehicle, the transmission is lifted using heavy equipment such as a lift, the entire transmission is taken out of the vehicle, and the transmission is removed outside the vehicle. At present, repair work is being carried out.

However, the work using the above-mentioned heavy equipment is expensive, and there is a demand to repair the transmission without using such equipment. The present invention
An object of the present invention is to provide a transmission that can easily disassemble, replace, and repair internal components of the transmission while the transmission main body is mounted on a vehicle.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention and the like have made various studies, and have made it possible to assemble and disassemble in a sub-assembly state in which elements such as gears and synchro are incorporated into a shaft. Thought. If the entire transmission is not removed from the vehicle, and only the shaft with each component mounted is to be removed from the transmission case to the outside of the vehicle, the conventional transmission may have a problem in terms of space on the vehicle. Is limited, there is no space to escape the end of the shaft with each element mounted outside the transmission case, and only the shaft with each element mounted cannot be taken out of the vehicle. Further, since the bearing member cannot be removed from the transmission case mounted on the vehicle, each fitting hole does not become a clearance space for the shaft end.

[0011] Therefore, the present invention and the like, in order to be able to take out only the shaft in the state where each element is mounted from the transmission case to the outside of the vehicle, at least one of the axially opposed sides of the transmission relatively By providing a wide opening and holding the bearing member of each shaft with a cover covering the opening,
Confirmed that the problem could be solved. That is, in the transmission of the present invention that has solved the above-described problem, the rotation of the engine is transmitted, and the first shaft on which the predetermined gear is mounted, the gear meshed with the gear of the first shaft, and the synchronization mechanism are formed. A transmission comprising: a mounted second shaft; and a transmission case having an upper opening closed by a support plate of an operation mechanism and rotatably holding the first shaft and the second shaft. The transmission case has a side opening on a side where one end of each of the first and second shafts is arranged, and the first shaft and the second shaft are formed on a side opposed to the side opening. A main case that holds one end of each of the shafts via a bearing member; and a side opening that holds each one end of the first and second shafts via a bearing member and holds each of the other ends. With a cover to close It is characterized in.

According to another aspect of the present invention, a first shaft to which a rotation of an engine is transmitted and a predetermined gear is mounted, a gear meshed with the gear of the first shaft, and a synchronization mechanism are mounted. A second shaft, an upper opening closed by a support plate of an operation mechanism, and a side opening at a side where one end of each of the first shaft and the second shaft is disposed; and A transmission main case for holding the other end of each of the first shaft and the second shaft via a bearing member at a side portion facing the side opening, and bearing one end of each of the first and second shafts And a cover that closes the side opening while holding the other end of the transmission, wherein the transmission is mounted on a vehicle, Remove the support plate of the operation mechanism and the cover. Opening the upper opening and the side opening Te, the first to the side opening of the cover is removed
And one end of the second shaft is escaped, and the one shaft is turned in a direction orthogonal to the axial direction of the transmission to align the direction of the one shaft with the longitudinal direction of the upper opening. The one shaft or the other shaft with the bearing member mounted on the gear and the other end side from an opening is taken out of the vehicle.

In the transmission and the repair method of the present invention,
By removing the cover and opening the side opening, one end of the first and second shafts can use the side opening as a clearance space for the ends of the first and second shafts. By rotating the first and second shafts in a state where gears and the like are mounted and aligning the shaft direction with the length direction of the upper opening, the first and second shafts can be easily moved from inside the transmission case to the vehicle. The components on each shaft can be disassembled, replaced, and repaired outside the vehicle.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the transmission and the repair method according to the present invention, the first shaft receives the rotation of the engine,
A speed gear fixed on the shaft and an idler gear idle on the shaft can be provided. Second
Can have a low gear and a high gear, a forward gear and a reverse gear, a low-high switching synchro mechanism, and a forward / backward switching synchro mechanism.

The first and second shafts are mounted with the above-mentioned predetermined gears, a synchronizing mechanism and the like, and are mounted with bearing members at the respective ends arranged on the side opening side. The transmission case is loaded from the upper opening.
In the transmission case including the main case and the cover, it is preferable that one side opening is provided as a common one at the ends arranged on the same side in the axial direction of the shafts arranged in parallel.
As a result, the side opening can be widened, and the effect as an escape space increases.

The bearing member at the other end of each shaft held by the cover may be provided integrally with the cover.

[0017]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same elements as those of the conventional transmission are denoted by the same reference numerals. As shown in FIG. 1, the transmission according to one embodiment of the present invention includes bearing members 25 and 26 and bearing members 2 that support both ends of first and second shafts 14 and 9.
Other than 7 and 28, the configuration is the same as the conventional one. That is,
A speed gear 10 and an idler gear 11 are mounted on the first shaft 14, and a low gear 1, a high gear 2, a forward gear 3, a reverse gear 4,
A synchro mechanism 5 for low-high switching and a synchro mechanism 6 for forward / backward switching are mounted. However, in this configuration, the idler shaft is omitted. The output shaft 20 is the idler gear 1 of the first shaft 14.
Directly connected to 1.

The transmission of this embodiment is characterized by a transmission case 29. That is, the transmission case 29
It has an upper opening 18 closed by the support plate 22 of the operating mechanism 21 and has a side opening 30 at the rear side in the axial direction where one ends of the first shaft 14 and the second shaft 9 are arranged. And the fitting holes 12a, 7a of the bearing members 25, 27 attached to the other end of the first shaft and the second shaft at the side facing the side opening 30.
And a cover 31 for closing the side opening 30 as shown in FIGS. 2 and 3.

The transmission main case 29A includes the bearing member 2
It is functionally integral with the sub case 29B that closes the fitting holes 12a, 7a in which the fittings 5, 27 are fitted. Cover 31
As shown in FIG. 3, when mounted on the transmission main case 29A so as to close the side opening 30, the first and second
Of the shafts 14 and 9 are held via bearing members 26 and 28, respectively. For this reason, as shown in FIG. 3, concave portions 26a and 28a are formed on the inner surface of the cover 31 so as to be fitted to the outer peripheral surfaces of the bearing members 26 and 28.

The transmission main case 29A also has a sub case 17D for concealing the bearing member 24 of the output shaft 20 as an integrated body. The transmission according to the present embodiment is configured as described above. Next, a method of assembling the transmission having the above configuration and a method of repairing the transmission at a repair shop will be described. As shown in FIGS. 9 and 10, the transmission of this embodiment includes a low gear 1, a high gear 2, a forward gear 3, a reverse gear 4, a low-high switching synchronizing mechanism 5, and a forward / backward switching synchronizing mechanism 6, The second shaft 9 in a state where the bearing member 28 is mounted on the other end disposed on the side opening 30 side, the speed gear 10 and the idler gear 11 are mounted, and the other end disposed on the side opening 30 side And the first shaft 14 with the bearing member 26 mounted thereon is mounted outside the vehicle.

The second shaft 9 in the assembled state is shown in FIG.
As shown in FIG.
While inserting the shaft end without the bearing member 28 into the fitting hole 7a of the transmission main case 29A,
The second shaft 9 is pivoted as indicated by the arrow in FIG. 5 to temporarily align the second shaft 9 in the axial direction (FIG. 6).

Next, the first shaft 14 in the assembled state is
As shown in FIG. 7, the lower end of the bearing member 26 is inserted through the upper opening 18 into the side opening 30, and then the opposite end is inserted into the fitting hole as shown in FIG. 1
2a. As a result, as shown in FIG.
Temporarily placed at 9A. In addition, since the first shaft 14 can retreat the rear end portion rearward, the first shaft 14 can be temporarily placed with its entire length shortened.

Next, the first shaft 14 in the temporarily placed state
And bearing members 25, 2 on each front end side of the second shaft 9.
7 and the bearing members 26, 28 at each rear end.
Are held by the recesses 26a and 28a, respectively, and the cover 31 is assembled. Thereby, the side opening 30 is closed. When disassembling or repairing the internal elements while the transmission assembled as described above is mounted on the vehicle, first, the support plate 22
And the cover 31 are removed. When the first shaft 14 is taken out of the vehicle, the front end of the first shaft 14 is released into the side opening 30, and the rear end of the first shaft 14 is removed from the bearing member 12. 8. Take out the first shaft 14 from the upper opening 18 in the procedure of FIG. The second shaft 9 can be similarly taken out of the vehicle.

The first or second shafts 14, 9 in which the repaired gears or the like have been assembled can be installed in the transmission case by the procedure at the time of assembly.

[0025]

As described above, according to the present invention, a relatively wide opening is provided on at least one side of the transmission in the axial direction, and the bearing member of each shaft is held by a cover covering the opening. As a result, only the shaft in which each element is mounted can be easily taken out of the transmission case from the transmission case while avoiding gear interference. Decomposition of the above elements,
Replacement and repair can be performed outside the vehicle.

[Brief description of the drawings]

FIG. 1 shows a transmission according to an embodiment of the present invention, and FIG.
FIG. 4 is a developed sectional view developed along a line.

FIG. 2 is a side view of the transmission of FIG. 1 as viewed from the right side.

FIG. 3 is a view showing a cover which is one component of the present invention.

FIG. 4 is an explanatory diagram showing a procedure for assembling a second shaft.

FIG. 5 is an explanatory diagram showing a procedure for assembling a second shaft.

FIG. 6 is an explanatory view showing a procedure for assembling a second shaft.

FIG. 7 is an explanatory view showing a procedure for assembling the first shaft.

FIG. 8 is an explanatory view showing a procedure for assembling the first shaft.

FIG. 9 is an explanatory view showing the second shaft in a state where gears and the like are assembled.

FIG. 10 is an explanatory view showing the first shaft in a state where gears and the like are assembled.

FIG. 11 is a developed cross-sectional view showing a conventional transmission, which is developed along a line B in FIG. 12;

FIG. 12 is a side view of the transmission of FIG. 11 as viewed from the right side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 14 ... 1st shaft 9 ... 2nd shaft and 21 ... Operating mechanism 22 ... Support plate 18 ... Upper opening 30 ... Side opening 25-28 ... Bearing member 31 ... Cover

Claims (2)

[Claims] 1. A first shaft to which a rotation of an engine is transmitted and on which a predetermined gear is mounted, a second shaft on which a gear meshed with the gear of the first shaft and a synchronizing mechanism are mounted. Has an upper opening closed by a support plate of the operation mechanism,
A transmission case for rotatably holding the first shaft and the second shaft, wherein the transmission case is arranged at one end of each of the first and second shafts. A main case having a side opening in a side portion and holding one end of each of the first shaft and the second shaft via a bearing member at a side portion facing the side opening; and the first and second cases. And a cover that holds one end of the shaft through a bearing member and closes the side opening while holding the other end. 2. A first shaft to which a rotation of an engine is transmitted and a predetermined gear is mounted, a second shaft to which a gear meshed with the gear of the first shaft and a synchronization mechanism are mounted. A side having an upper opening closed by a support plate of the operating mechanism, having a side opening at a side where one end of each of the first shaft and the second shaft is arranged, and facing the side opening; A transmission main case that holds the other end of each of the first shaft and the second shaft via a bearing member, and holds one end of each of the first and second shafts via a bearing member; A method of repairing a transmission, comprising: a cover that closes the side opening while holding each of the other ends; and a support plate of the operation mechanism, wherein the transmission is mounted on a vehicle. Remove the cover and open the upper One end of one of the first and second shafts is released into the side opening from which the cover has been removed, and the one shaft extends in a direction orthogonal to the axial direction of the transmission. By turning, the direction of the one shaft is adjusted to the longitudinal direction of the upper opening, and the one shaft or the other shaft in a state in which the bearing member is mounted on the gear and the other end side from the upper opening. A method for repairing a transmission, which is taken out of a vehicle.