JPH01131360A - Speed change gear - Google Patents

Abstract

PURPOSE:To increase a speed ratio by a method wherein the rotation force of a second intermediate gear unit connected to the one of the two gears of a first intermediate gear unit is transmitted to an output rotary shaft through each of two output shaft gears. CONSTITUTION:Gears 4 and 5 are secured to an input rotary shaft 2, and a gear 8, rotatably mounted on an output shaft 6, and a gear 9 secured on the shaft 6 are mounted to an output shaft 6 situated in parallel to the input shaft 2. Further, two first intermediate gear units 14 and 18 are situated to a housing 10, and have a gear and a clutch. During actuation, the one of clutches 14d, 18d and 22 is selectively coupled, and when the one of clutches 11 and 20d is selectively coupled, a rotation force is transmitted through the selected clutch, and a gear ratio determined by the size of 8 gear can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission, and more particularly to a transmission capable of shortening the length in the direction of the input rotation axis. Such a transmission device is effectively used, for example, as a transmission device for automobiles.

[Prior art and its problems] As is well known, in automobiles, the driving rotational force from the output shaft of the engine is selectively changed at appropriate times by a transmission to obtain the desired driving force. transmitted to the drive wheels.

Conventionally, a two-shaft parallel gear type transmission has been widely used as such a transmission. This system generally has an input shaft and an output shaft extending in the direction of the engine's output shaft, and a counter shaft arranged in line with these two shafts, and connects these shafts using multiple sets of gears with different gear ratios. Combine selectively. Therefore, such a transmission is considerably long in the axial direction and is arranged in a manner that projects from the engine in the direction of its output shaft.

For this reason, the conventional transmission and engine as described above are quite long as a whole, which can be a constraint on the automatic ifi design, and is especially an obstacle when trying to downsize automobiles.

Furthermore, in recent years, transversely mounted engines have been used to make the drive power transmission system of passenger cars more compact.In this case, the transmission is placed in the width direction of the car body relative to the engine, so Due to limitations, it is especially desirable to shorten the length.

SUMMARY OF THE INVENTION In view of the problems of the prior art described above, it is an object of the present invention to provide a transmission device whose axial length can be sufficiently shortened.

[Means for Solving the Problems] According to the present invention, in order to achieve the above objects, a gear is attached to the input rotating shaft, and a first intermediate gear unit is connected to the input shaft gear. connected and the first
The intermediate gear unit has two gears disposed coaxially in the axial direction and a clutch between the gears, one of the two gears meshes with the input shaft gear, and the first The other of the two gears of the intermediate gear unit is the second
The second intermediate gear unit has two gears coaxially arranged in the axial direction, and one of the two gears is connected to the J-2 first intermediate gear. The two gears of the second intermediate gear unit mesh with the other gear of the unit, and the two gears of the second intermediate gear unit mesh with the two gears attached to the output rotating shaft, and the second
59 clutches are provided for switching between two rotational force transmission paths for transmitting the rotational force of at least one gear of the intermediate gear unit to the output rotating shaft via each of the two output shaft gears. , a transmission, and a gear is attached to the output rotating shaft, a first intermediate gear unit is connected to the output shaft gear, and a first intermediate gear unit is connected to the output shaft gear.
The intermediate gear unit has two gears disposed coaxially in the axial direction and a clutch between the gears, one of the two gears meshes with the output shaft gear, and the first The other of the two gears of the intermediate gear unit/) is connected to a second intermediate gear unit, the second intermediate gear unit having two gears coaxially arranged in the axial direction. One of the two gears meshes with the other gear of the first intermediate gear unit, and one of the two gears meshes with the other gear of the first intermediate gear unit.
Two gears of the intermediate gear unit mesh with two gears attached to the input rotating shaft, and the rotational force of at least one gear of the second intermediate gear unit is transmitted through each of the two output shaft gears. A transmission device characterized by being provided with a clutch for switching between two rotational force transmission paths transmitted to an input rotating shaft.

is provided.

[Example] Hereinafter, specific examples of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic front view showing a first embodiment of the transmission device according to the present invention, and FIGS. It is an IT-IT sectional view.

In these figures, 2 is an input rotating shaft, and this shaft is connected to an unillustrated rotational power source such as an engine output shaft. Two input shaft gears 4.5 are fixed to the shaft 2. Further, 6 is an output rotation shaft arranged parallel to the input rotation shaft 2, and this shaft is connected to an input shaft of a driven device (not shown). Two output shaft gears 8 and 9 are attached to the shaft 6, and the output shaft gear 8 is rotatably attached to the output rotating shaft 6, and 11 is a clutch for connecting these. Further, the output shaft gear 9 is fixed to the output rotating shaft 6.

The input rotating shaft 2 and the output rotating shaft 6 are rotatably supported by the housing IO. Note that the housing 10 is not shown in FIG. 1.

The housing 10 includes two first intermediate gear units t.
4. ts is installed.

The first intermediate gear unit 14 includes a rotating shaft 14a that is rotatably attached to the housing lO parallel to the input rotating shaft 2 and the output rotating shaft 6, and a rotating shaft 14a that is rotatably attached to the rotating shaft and the input shaft gear. 1st gear 14 meshing with 4
b, ft52 gear 14c fixed to the rotating shaft 14a;
, and a clutch 14d that connects the rotating shaft 14a and the first gear 14b.

A first intermediate gear unit) 1B includes a rotating shaft 16a that is rotatably attached to the housing 10 parallel to the input rotating wheel 2 and the output rotating shaft 6, and a rotating shaft 16a that is rotatably attached to the rotating shaft and the input shaft gear. 1st gear 16 meshing with 5
b, a second gear 16c fixed to the rotating shaft 16a, and a clutch lad connecting the rotating wheel 16a and the first gear 16b.

An intermediate gear unit 18 for reverse rotation is also attached to the housing 10.

The intermediate gear unit 18 includes a rotating shaft 18a that is rotatably attached to the housing lO parallel to the input rotating shaft 2 and the output rotating shaft 6, and a rotating shaft 18a that is rotatably attached to the rotating shaft and the intermediate gear unit 14. The first gear 14b of
a first gear 18b meshing with the rotating shaft 18a, a second gear 18c fixed to the rotating shaft 18a, and a first gear 18b meshing with the F-arranged rotating shaft 18a.
It has a clutch 18d that connects the gear 18b.

A second intermediate gear unit 20 is further attached to the housing 10.

The second intermediate gear unit 20 includes a rotary shaft 20a which is arranged coaxially with the input rotary shaft 2 and is rotatably attached to the housing 10, and a rotary shaft 20a which is fixed to the rotary shaft and which is attached to the first rotary shaft.
A first gear 20b that meshes with the second gear 14c of the intermediate gear unit 14, the tjS2 gear 16c of the first intermediate gear unit 16, the second gear 18c of the reverse rotation intermediate gear unit 18, and the output shaft gear 8. , the above rotating shaft 2
It has a second gear 20c that is rotatably attached to the shaft 0a and meshes with the output shaft gear 9, and a clutch 20d that connects the rotating shaft 20a and the second gear 20c.

Note that 22 is a clutch that connects the input rotating shaft 2 and the rotating shaft 20a of the second intermediate gear unit 20.

” - marking latches 11, 22, 14d, 16d, 18d
, 20d, for example, a hydraulically driven dog clutch, which is advantageous for downsizing and cost reduction, can be used.

Next, the operation of the device of this embodiment will be explained.

When the input rotation shaft 2 rotates, the rotational force of the input shaft gear 4 is transmitted to the first gear 14b of the first intermediate gear unit 14,
The rotational force of the input shaft gear 5 is transmitted to the first gear 16b of the first intermediate gear unit 16. First intermediate gear unit 14
The rotational force of the first gear 14b is further transmitted to the first gear 18b of the intermediate gear unit 18 for reverse rotation.

Here, when the clutch 14d of the first intermediate gear unit 14 is turned ON, the rotational force of the first gear 14b is transferred to the rotating shaft 14a.
is transmitted to the second gear 14c via the second intermediate gear 14c, and is further transmitted to the first gear 20b of 1.20 and the rotating shaft 20a, which meshes with the second intermediate gear 14c, and further transmitted to the first gear 20b and the rotation shaft 20a,
The rotational force of 0b is transmitted to the output shaft gear 8 meshing with the gear.

Therefore, when the clutch 11 is further turned ON, the rotational force of the output shaft gear 8 is transmitted to the output rotating shaft 6, and the rotating shaft is connected to the diameter of the input shaft gear 4, the diameter of the output shaft gear 8, and the first intermediate gear unit. The intermediate gear unit rotates at a speed ratio determined by the diameter of the first gear 14b of the gear unit No. 14 and the diameter of the second gear 14c of the intermediate gear unit. At this time, all clutches other than the clutches 14d and 11 are OFF.

Further, when the clutch 14d is turned on and the clutch 20d of the second intermediate gear unit 20 is turned on, the rotational force of the rotating shaft 20a of the intermediate gear unit is transferred to the second gear 20.
The rotational force of this gear is transmitted to the output shaft gear 9 through the output shaft gear 9, and the rotational force of this gear is transmitted to the output shaft 6, which is in turn connected to the input shaft gear 4.
the diameter of the output shaft gear 9, the diameter of the first gear 14b of the first intermediate gear unit 14, and the second gear 1 of the intermediate gear unit.
4C diameter and the first gear 20b of the second intermediate gear unit 20
and the diameter of the second gear 20C of the intermediate gear unit. At this time, all clutches other than the clutches 14d and 20d are OFF.

~ direction, turn the clutch 16d of the first intermediate brush stitch 16 to O.
Even when the clutch 14d of the first intermediate gear unit 14 is turned on, rotational force is transmitted in the same manner as when the clutch 14d of the first intermediate gear unit 14 is turned on.

At this time, when the clutch 11 is ON, the output rotating shaft 6 is connected to the diameter of the input shaft gear 5, the diameter of the output shaft gear 8, the diameter of the first gear 16b of the first intermediate gear unit 16, and the diameter of the first gear 16b of the first intermediate gear unit 16. It rotates at a speed ratio determined by the diameter of the second gear 16c, and the clutch 20d of the second intermediate gear unit 20 is turned on.
In this case, the output rotating shaft 6 is the diameter of the input shaft gear 5, the diameter of the output shaft gear 9, and the first gear 16b of the first intermediate gear unit 16.
, the diameter of the second gear 16c of the intermediate gear unit, and the diameter of the second gear 16c of the intermediate gear unit.
It rotates at a speed ratio determined by the diameter of the first gear 20b of the intermediate gear unit 20 and the diameter of the second gear 20c of the intermediate gear unit. At these times, all other clutches are OFF.
It is F.

On the other hand, the clutch 18d of the intermediate gear unit 18 for reverse rotation
When turned on, the rotational force of the first gear 18b is applied to the rotation shaft 18.
a to the second gear 18c, and further transmitted to the fjS1 gear 20b of the second intermediate gear unit 20 meshing with the second gear 18c and the rotating shaft 20a.

Hereinafter, the rotational force is transmitted in the same manner as when the clutches 14d and 16d of the first intermediate gear unit) 14.16 are turned ON, and at that time, when the clutch 11 is ON, the output rotation shaft 6 is It rotates in reverse at a speed ratio determined by the diameter of the shaft gear 4, the diameter of the output shaft gear 8, the diameter of the first gear 18b of the intermediate gear unit 18 for reverse rotation, and the diameter of the second gear 18c of the intermediate gear unit, When the clutch 20d of the second intermediate gear unit 20 is ON, the output rotating shaft 6 matches the diameter of the input shaft gear 4, the diameter of the output shaft gear 9, and the diameter of the first gear 18b of the reverse rotation intermediate gear unit 18. The diameter of the second gear 18c of the intermediate gear unit and the first gear of the second intermediate gear unit 20
The diameter of the gear 20b and the second gear 2 of the intermediate gear unit
It rotates in reverse at a gear ratio determined by the diameter of 0c. At these times, all other clutches are OFF.

Also, when the F-marked latch 22 is turned on, the input rotation shaft 2
The rotational force is immediately applied to the rotating shaft 2 of the i2 intermediate gear unit 20.
0a, and further transmitted to the first gear 20b of the gear unit.
The signal is transmitted to the output shaft gear 8 that meshes with the output shaft gear 8. that time,
When the clutch 11 is ON, the output rotating shaft 6 is connected to the diameter of the output shaft gear 8 and the first gear 20b of the second intermediate gear unit 20.
When the clutch 20d of the second intermediate gear unit 20 is ON, the output rotating shaft 6 rotates at a speed ratio determined by the diameter of the output shaft gear 9 and the second gear 20c of the second intermediate gear unit 20. It rotates at a gear ratio determined by the diameter of the At these times, all other clutches are OFF.

As described above, one of the clutches 14d, 16d, 18d, 22 is selectively engaged and the clutches 11, 20
When one of the clutches d is selectively engaged, rotational force is transmitted via the selected clutch, and a speed change ratio determined by the diameter of the gear involved in the rotational force transmission can be obtained.

An example of the relationship between clutch selection and gear ratio is jn1 below.
Table 6 Table 1 FIG. 5 is a schematic cross-sectional view showing a state in which the transmission of this embodiment is connected to an engine.

In this figure, 26 is the output shaft of the engine, and 28 is a torque converter connected to the shaft. The output shaft of the torque converter and the input rotating shaft 2 of the transmission of this embodiment are connected.

Furthermore, one end of the output rotating shaft 6 is connected to the front wheel drive system via a differential 29, and the other end is connected to the rear wheel drive system.

As shown in the figure, the length of the transmission of this embodiment in the directions of the input rotation axis and the output rotation axis is significantly shorter than that of the conventional transmission (indicated by the imaginary line 30).

FIG. 6 is a cross-sectional view showing a partial modification of the above-mentioned embodiment. Similar parts are given the same reference numerals.

In this modification, the two gears 20b and 20c of the second intermediate gear unit 20 are both fixed to the rotating shaft 20a, the gear unit does not include a clutch, and the output shaft gear 9 is an output shaft gear. 8, it is rotatably attached to the output rotating shaft 6, and these output shaft gears 8, 9 are selectively connected to the output rotating shaft 6 by a clutch 24.

According to this modification as described above, for example, the second gear 14c of the first intermediate gear unit 14 is replaced with the second intermediate gear unit/
) The second gear 16c of the first intermediate gear unit 16 can be connected to mesh with the second gear 20c of the second intermediate gear unit 20, and the gear ratio can be selected. The degree of freedom increases. Furthermore, since there is no clutch in the second intermediate gear unit 20, the length of the entire device in the axial direction can be further reduced.

In the above embodiment, since the first gear of the first intermediate gear unit and the first gear of the reverse rotation intermediate gear unit are constantly rotating, it is possible to obtain input from the gears, for example, to a timing mechanism essential for engine operation. Can be done. That is, for example, the rotation of a camshaft and the rotation of a distributor for driving intake and exhaust valves can be driven. In this manner, according to the above embodiment, the timing belt train of the engine, which was conventionally provided exclusively, can also be omitted.

In the above embodiment, the input rotating shaft 2 and the output rotating shaft 6 are arranged coaxially, and a clutch is provided between them, so that a large number of gear ratios can be achieved considering the intermediate gear unit. can be obtained.

Note that similar effects can be obtained even if the input side and output side are reversed in the above embodiment, and the present invention also includes such an aspect.

[Effects of the Invention] As described in detail below, according to the present invention, the axial length of the transmission can be sufficiently shortened, and based on this, the degree of freedom in designing the driving force transmission system can be increased. can be dramatically improved.

Furthermore, according to one aspect of the invention, the first intermediate gear unit and the second
Since the second intermediate gear unit is connected in series and the rotational force is transmitted from the second intermediate gear unit to the output rotating shaft or the input rotating shaft through multiple transmission paths, a sufficient number of speeds can be achieved even with a small number of intermediate gear units. You can get the ratio.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing a transmission according to the present invention, and FIGS. 2, 3, and 4 are II--FIGS.
They are a 1 m-m sectional view and an IT-■ sectional view. FIG. 5 is a schematic cross-sectional view showing a state in which the transmission according to the present invention is connected to an engine. FIG. 6 is a sectional view showing a transmission according to the present invention. 2 two input rotating shafts, 4, 5: input shaft gear, 6: output rotating shaft, 8.9 = output shaft gear, lO: housing, 11.22, 24: clutch, 14.16: il intermediate gear unit, 18 : Intermediate gear unit for reverse rotation, 20: Second intermediate gear unit. Figure 2 I8 Figure 3 Figure 4 Old Figure 6

Claims (8)

[Claims] (1) A gear is attached to the input rotating shaft, and a first intermediate gear unit is connected to the input shaft gear,
The first intermediate gear unit has two gears coaxially arranged in the axial direction and a clutch between the gears, one of the two gears meshing with the input shaft gear, The other of the two gears of the first intermediate gear unit is connected to a second intermediate gear unit, the second intermediate gear unit having two coaxially arranged gears. One of the two gears meshes with the other gear of the first intermediate gear unit, and the two gears of the second intermediate gear unit mesh with two gears attached to the output rotating shaft. Yes, the second above
The intermediate gear unit is characterized by being provided with a clutch for switching between two rotational force transmission paths for transmitting the rotational force of at least one gear to the output rotating shaft via each of the two output shaft gears, gearbox. (2) The transmission according to claim 1, wherein the input rotating shaft and the rotating shaft of the second intermediate gear unit are arranged coaxially, and a clutch is provided between them. (3) An intermediate gear unit for reverse rotation is provided,
A transmission device according to claim 1. (4) A clutch for switching between the two rotational force transmission paths is provided between each output shaft gear and the output rotating shaft,
A transmission device according to claim 1. (5) A gear is attached to the output rotating shaft, and a first intermediate gear unit is connected to the output shaft gear,
The first intermediate gear unit has two gears coaxially arranged in the axial direction and a clutch between the gears, one of the two gears meshing with the output shaft gear, The other of the two gears of the first intermediate gear unit is connected to a second intermediate gear unit, the second intermediate gear unit having two coaxially arranged gears. One of the two gears meshes with the other gear of the first intermediate gear unit, and the two gears of the second intermediate gear unit mesh with two gears attached to the input rotating shaft. Yes, the second above
The intermediate gear unit is characterized by being provided with a clutch for switching between two rotational force transmission paths for transmitting the rotational force of at least one gear to the input rotating shaft via each of the two output shaft gears, gearbox. (6) The transmission according to claim 5, wherein the output rotating shaft and the rotating shaft of the second intermediate gear unit are arranged coaxially, and a clutch is provided between them. (7) An intermediate gear unit for reverse rotation is provided,
The transmission device according to claim 5. (8) A clutch for switching between the two rotational force transmission paths is provided between each input shaft gear and the input rotating shaft;
The transmission device according to claim 5.