JPH0534541B2 - - Google Patents

Description

[Detailed description of the invention] [Object of the invention] (Industrial application field) The present invention relates to improvement of a transmission,
It is particularly used in industrial vehicles such as forklifts that have a transmission mechanism with two forward speeds and one reverse speed, or one forward speed and two reverse speeds.

(Prior art) As a prior art related to the present invention, JP-A-59-
There is one published in No. 110947. As shown in FIG. 2, this is the H drive gear 11 fixed to the input shaft 111.
2. L drive gear 113 rotatably disposed on input shaft 111; L clutch 114 capable of integrally rotatably coupling L drive gear 113 and input shaft 111;
An R drive gear 115 rotatably arranged on the input shaft 111, an R clutch 116 that can connect the R drive gear 115 and the input shaft 111 so as to be integrally rotatable, and an L intermediate gear 117 that meshes with the L drive gear 113 are fixed. an intermediate shaft 118 that rotates freely on the intermediate shaft 118 and meshes with the H drive gear 112;
9. H clutch 120 capable of connecting the H intermediate gear 119 and the intermediate shaft 118 such that they can rotate together; intermediate shaft 1;
18, an output shaft 123 having an output gear 122 that meshes with the intermediate output gear 121 and the R drive gear 115, and has two forward stages H and L and one reverse stage R. This is the transmission that consists of the following.

(Problems to be Solved by the Invention) This prior art has the following problems. That is, since the L clutch 114 and the H clutch 120 are located at a position where they interfere in the axial direction, it is necessary to separate the shafts 111 and 118 so that they do not interfere.
The distance between the shafts has increased, and the capacity of the entire transmission in the direction between the shafts has increased.

The technical object of the present invention is to solve the above-mentioned problems of the prior art and to reduce the capacitance in the interaxial direction.

[Structure of the invention]

(Means for Solving the Problems) The technical measures taken to solve the above technical problems include a drive gear fixed to the input shaft, and a first gear rotatably arranged on the input shaft. and the first
a first clutch capable of integrally rotatably joining a gear and the input shaft; a first intermediate shaft arranged parallel to the input shaft; and a first clutch arranged rotatably on the first intermediate shaft and connected to the drive gear. a second gear that meshes with the second gear, a second clutch that can rotatably connect the second gear and the first intermediate shaft together, and a third gear that is rotatably disposed on the first intermediate shaft; A third clutch capable of integrally rotatably joining the third gear and the first intermediate shaft, a fourth gear that meshes with the second gear, and a fifth gear that meshes with the third gear are fixed. a second intermediate shaft; a sixth gear fixed to the first intermediate shaft;
a first output gear that meshes with the sixth gear and the first gear; a second output gear that is rotatable together with the first output gear via the first output shaft; and a second output gear that meshes with the second output gear. In a transmission having a third output gear, a second clutch and a third clutch arranged in series on the first intermediate shaft are arranged axially opposite to the first clutch with respect to the drive gear. The transmission was configured so that

(effect) The above technical means works as follows.

The first system of power transmission is by connecting the first clutch, the input shaft → first clutch → first gear → output gear → output shaft, and the second system is by connecting the second clutch, the input shaft → Drive gear → 2nd gear →
2nd clutch -> 1st intermediate shaft -> 6th gear -> output gear -> output shaft, and in the 3rd system, by connecting the 3rd clutch, input shaft -> drive gear -> 2nd gear -> 4th gear
Gear → second intermediate shaft → fifth gear → third gear → third clutch → first intermediate shaft → sixth gear → output gear → output shaft. Here, the first clutch, the second clutch, and the third clutch are arranged on opposite sides in the axial direction with respect to the second gear. Therefore, the first clutch, the second clutch, and the third clutch do not interfere in the direction of the distance between the shafts, regardless of the size of the drive gear and the second gear. Therefore, the drive gear or the second gear is connected to the first clutch or the second gear.
It is possible to set the clutch to be smaller in the radial direction than the clutch or the third clutch, and the distance between the shafts can be shortened.

(Example) Hereinafter, the present invention will be described with reference to examples.

In FIG. 1, a forward drive gear 12 is fixed to an input shaft 11, and a reverse reverse gear 13, which is a first gear, is rotatably fitted. The reverse gear 13 and the input shaft 11 are connected to the first clutch R.
The clutch 14 allows for integral rotation. The forward shaft 15, which is a first intermediate shaft arranged parallel to the input shaft 11, has a forward H gear 16 for the second forward stage, which is the second gear, and a forward first stage forward gear, which is the third gear.
Forward L gears 18 for stages are fitted in such a manner that they can rotate freely, and the forward H gears 16 are always in mesh with the drive gears 12. An H clutch 17, which is a second clutch, and an L clutch 19, which is a third clutch, which enable the forward H gear 16 and the forward L gear 18 to rotate integrally with the forward shaft 15, respectively, are disposed on the forward shaft 15. . The clutch 17 and the L clutch 19 are located on the opposite side in the axial direction with respect to the meshing position between the drive gear 12 and the forward H gear 16. There is an idle shaft 22, which is a second intermediate shaft, parallel to the forward shaft 15, and this has an idle H gear 20, which is a fourth gear, which is always in mesh with the forward H gear 16, and a fifth gear, which is always in mesh with the forward L gear 18. The idle L gear 21 is fixed. A forward final gear 23, which is a sixth gear, is fixed to the forward shaft 15. A first output gear 24 that constantly meshes with the forward final gear 23 and the reversing gear 13 is fixed to the first output shaft 25 . Furthermore, in order to match with the vehicle, a second output gear 26, a second output shaft 28,
A third output gear 27 is incorporated.

In the above configuration, when the first forward stage is activated, by operating the L clutch 19, the power is transmitted from the input shaft 11 → drive gear 12 → forward H gear 16 → idle H gear 20 → idle shaft 22 →
Idle L gear 21 → Forward L gear 18 → L
The sequence is clutch 19→forward shaft 15→forward final gear 23→first output gear 24, and reaches output shaft systems 25, 26, 27, and 28.
During the second forward action, by operating the H clutch 17, the power is transmitted as follows: input shaft 11 → drive gear 12 → forward H gear 16 → H clutch 17 →
Forward axis 15 → Forward final gear 2
3 → the first output gear 24, and the output shaft system 2
Reach 5, 26, 27, 28. During backward action,
By operating the R clutch 14, power is transmitted in the order of input shaft 11→R clutch 14→reverse gear 13→first output gear 24, and reaches output shaft systems 25, 26, 27, and 28. In the above, the drive gear 12 and the forward gear H gear 16
Even if the diameter of the shaft is smaller than the diameter of the R clutch 14 and the H clutch 17 and the distance between the shafts 11 and 15 is shortened,
The R clutch 14 and the H clutch 17 do not interfere with each other.

In Fig. 1, the output shaft system is the first output shaft 2.
5, second output gear 26, third output gear 27, second
Although it is composed of an output gear 28, the first output shaft 15
You can also use only

Furthermore, the H clutch 17, L clutch 19, forward H gear 16, forward L gear 18, idle H gear 20, and idle L gear 21 may be reversed.

Furthermore, in order to create a transmission with one forward speed and two reverse speeds, the reverse systems 13 and 14 in FIG. 1 are changed to one forward speed,
Forward H, L system 12, 15-23 reverse 2
It may be done in steps.

(Effect of the invention) The present invention has the following unique effects.

Generally, due to the structure of a transmission, oil pools around the input shaft, so in the prior art, two clutches, the L clutch 114 and the R clutch 116, are soaked in oil, resulting in large resistance due to oil and a loss of horsepower.

In contrast, in the present invention, since only one first clutch is provided around the input shaft, there is less resistance due to oil and less horsepower loss.

[Brief explanation of the drawing]

FIG. 1 shows a gear train of a transmission with two forward speeds and one reverse speed according to the present invention, and FIG. 2 shows a gear train of the prior art. 11...Input shaft, 12...Drive gear, 13...
Reverse gear (first gear), 14...R clutch (first clutch), 15...Forward shaft (first intermediate shaft), 16...Forward H gear (second gear),
17...H clutch (second clutch), 18...
Forward L gear (third gear), 19... L clutch (third clutch), 20... Idle H gear (fourth gear), 21... Idle L gear (fifth gear), 22... Idle shaft ( second intermediate shaft), 23...
...Forward gear (6th gear), 24
...First output gear, 25...First output shaft.

Claims (1)

[Claims] 1. A drive gear fixed to an input shaft, a first gear rotatably disposed on the input shaft, and a first gear capable of joining the first gear and the input shaft so as to be integrally rotatable.
a clutch, a first intermediate shaft disposed parallel to the input shaft, a second gear rotatably disposed on the first intermediate shaft and meshing with the drive gear, the second gear and the first intermediate shaft; a second clutch that can be rotatably joined to the shaft; a third gear that is rotatably disposed on the first intermediate shaft; and a third gear that is rotatable together with the first intermediate shaft. a third clutch capable of joining;
a second intermediate shaft that fixes a fourth gear meshing with the second gear and a fifth gear meshing with the third gear; a sixth gear fixed to the first intermediate shaft; and a sixth gear fixed to the first intermediate shaft. and a first output gear that meshes with the first gear, a second gear that is rotatable together with the first output gear via the first output shaft, and a third output gear that meshes with the second output gear. In the transmission, the second clutch and the third clutch arranged in series on the first intermediate shaft are arranged axially opposite to the first clutch with respect to the drive gear. The transmission.