JPS61192952A - Gear type transmission - Google Patents

Abstract

PURPOSE:To simplify a mechanism, by providing a single one-way clutch in the all power transmission systems and selectively using in common said single one-way clutch. CONSTITUTION:A gear type transmission A, combining clutch units 4, 8, interrupting on-off clutches 5, 9 and synchromesh units 50, 60 to be connected or engaged, attains a 4-forward and 1-reverse speed change shift. The transmission A is equipped with two driving gear shafts (input shaft) 1, 2 mutually arranged on an equal axial line and one driven gear shaft (output shaft) 3 parallelly provided to these driving gear shafts. The other end of the driving gear shaft 1 is selectively connected with an output shaft 101 through the interrupting on-off clutch 5, one-way clutch 6 and an intermediate shaft 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a gear type transmission used in a vehicle such as an automobile, and particularly to a gear type transmission used as an automatic transmission for a vehicle.

(Prior art) As a conventional gear type transmission device, for example, JP-A-58-
A device as described in Japanese Patent No. 225244 is known.

This conventional device is a selective gear type transmission, and when changing gears, in order to prevent the prime mover from being disconnected from the transmission, the previously disconnected clutch is connected, and the previously connected clutch is also connected. It was equipped with a one-way clutch that made shifting easier by eliminating the need for delicate control of the two clutches, such as disengagement, and an intermittent clutch was installed in parallel with the one-way clutch to obtain an engine braking effect. .

(Problems to be Solved by the Invention) However, in such a conventional gear transmission, a one-way clutch is disposed in each of a plurality of power transmission systems branching from the input shaft. There were problems in that the transmission was mechanically complex and also large in size.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the problems as described in J. A plurality of power transmission systems each having a pair of speed change gears are provided between the plurality of power transmission systems, and the plurality of power transmission systems transmit power only when the rotational speed of the input member is about to increase beyond the rotational speed of the output member. In a gear type transmission including a one-way clutch, an intermittent clutch connected in series to the one-way clutch, and a clutch connected in parallel to the one-way clutch, one one-way clutch is provided in all power transmission systems. This one-way clutch is selectively shared.

(Function) Therefore, in the gear type transmission device of the present invention, as described above,
By using one one-way clutch in all power transmission systems and selectively sharing this one-way clutch, the transmission can be made into a simple mechanism, and the one-way clutch is also smaller in terms of dimensions. By reducing the number to one, it is possible to shorten and downsize.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In describing the embodiment, a gear type transmission of an automatic transmission for a vehicle will be taken as an example.

First, the configuration of the first embodiment shown in FIG. 1 will be explained.

The gear type transmission A of the first embodiment has two drive gear shafts (input shafts) 1.2 arranged on the same axis, and a drive gear shaft 1.2 arranged parallel to the drive gear shafts 1.2. It has one driven gear shaft (output shaft) 3.

One end of the drive gear shaft 1 is connected via a clutch device 4 to
It is configured to be selectively connected to the output shaft 101 of the internal combustion engine 100.

The other end of the drive gear shaft l is selectively connected to an output shaft 101 of an internal combustion engine 100 via an intermittent clutch 5, a one-way clutch 6, and an intermediate shaft 7.

One end of the drive gear shaft 2 is connected to the clutch device 8° intermediate shaft 7.
is selectively connected to the output shaft 101 via the intermittent clutch 9. The one-way clutch 6 is selectively connected to the output shaft lO1 via an intermediate shaft.

The one-way clutch 6 has its input member 6a connected to an intermediate shaft 7 that is directly connected to the output shaft 101 of the internal combustion engine rA100, and its output member 6b is connected to the input member lO and the intermittent clutch 5.9. are connected,
Only when the rotational speed of the input member 6a is about to increase beyond the rotational speed of the output member 6b, the locked state is established and power is transmitted.

The drive gear shaft 1 includes a first continuous drive gear 21 .

The third speed drive gear 23 and the reverse drive gear 25 are each fixed.

Furthermore, a second speed drive gear 22 and a fourth speed drive gear 24 are each fixed to the drive gear shaft 2 .

The driven gear shaft 3 is rotatably provided with driven gears 31, 32, 33, 34 for 1st speed, 2nd speed, 3rd speed, and 4th speed, respectively. 31.32,3
3.34 are the driving gears 21, 22, 23.
24 and are constantly interlocking with each other.

Further, the driven gear shaft 3 is provided with a first speed-third speed synchronizer 50 and a second speed-fourth speed synchronizer 60, respectively.

These synchronizers 50 and 60 are of a well-known inertia lock type known as a Porgwana synchromesh, and include clutch hubs 51 and 61 fixed to the driven gear shaft 3, and a driven gear for the first speed. Gear 31. Gear pieces 52 and 53 integrally provided with each of the third speed driven gear 33 and the second speed driven gear 32. Gear pieces 62 and 63 provided integrally with each of the third-speed driven gears 34 and synchronizer sleeves 54 and 64 are provided.

The synchronizer 50 selectively connects either the first speed driven gear 31 or the third speed driven gear 33 to the driven gear shaft 3 in a power transmission connection relationship,
Further, the synchronizer 60 includes the second speed driven gear 3
Either one of the driven gear 2 and the fourth driven gear 34 is selectively connected to the driven gear shaft 3 in a power transmission connection relationship.

The synchronizer sleeve 54 of the synchronizer 50 is integrally provided with a reverse driven gear 35 .

The reverse driven gear 35 and the reverse drive gear 25 include
An intermediate gear 27, which is slidably and rotatably provided on the shaft 26 in its axial direction, is selectively and simultaneously engaged with the shaft 26.

Further, the driven gear shaft 3 is provided with one output gear 36, and this output gear 36 is always meshed with an input gear (ring gear) 38 of an operating gear device 37.

Note that the differential gear device 37 is of a well-known type.

As described above, in the power transmission path between the drive gear shaft 1 and the output shaft 101 of the internal combustion engine 100, the clutch device 4 and the one-way clutch 6 are in a parallel relationship, and the intermittent clutch 5 and the one-way clutch 6 are in a series relationship. There is a relationship between

Further, in the power transmission path between the drive gear shaft 2 and the output shaft 101 of the internal combustion engine 100, the clutch device 8 and the one-way clutch 6 are in a parallel relationship, and the intermittent clutch 9
and the one-way clutch 6 are in a series relationship.

Here, the disconnection clutch 5 and the disconnection clutch 9 have a common input member 10, and the input member 10 is connected to the output member 6b of the one-way clutch 6.

In this way, one one-way clutch 6 is selectively shared by a plurality of power transmission systems (drive gear shafts 1 and 2) via intermittent clutches 5 and 9.

Next, the operation of the first embodiment will be explained.

The gear type transmission A configured as described above includes clutch devices 4, 8, intermittent clutches 5, 9, synchronizer 50.
A combination of the connections or engagements of 80 as shown in Table 1 below achieves four forward speeds and one reverse speed.

Table 1 In Table 1, C4 is the clutch device 4, C8 is the clutch device 8, and C5 is the intermittent clutch 5. C9 is an intermittent clutch 9.0, WC6 is a one-way clutch 6, and S50 is a synchronizer 50. S60 is a synchronizer i60, G52
．． G53. G62. G63 has gear pieces 52, 53, 6
2.63 is shown.

In addition, ■ indicates connected or engaged members that are in actual operation.
★ indicates a member that is connected or engaged but does not operate, ★ indicates a one-way clutch locked state, (☆) indicates a locked state but does not operate, and ★ indicates a free state.

(b) Neutral stage In the neutral stage, all clutches are in a disengaged state.

The gear pieces 52 and 62 of the synchronizer 50 and 60 are in a locked state in preparation for switching to the first or second gear.

(b) Neutral gear → 11th gear To switch from neutral gear to L gear, first use the clutch device 4.
(state A) 1 Then, while keeping the clutch device 4 connected, connect the intermittent clutch 5 (state B 8) 1
Next, this is done by disengaging the clutch device 4 (state C), and the one-way clutch 6 is in the locked state from the moment the intermittent clutch 5 is connected.

Therefore, at the initial stage of switching to 1st speed (state A),
From the output shaft 101 to the clutch device 4 → the drive gear shaft l → the first speed drive gear 21 → the first speed driven gear 31 → the synchronizer 50 → the clutch hub 51 and then to the driven gear shaft 3. Then, after passing B9'fg, in the final first speed state, the drive transmission path is as follows: ).

(c) 1st gear → 2nd gear To switch from l to 2nd gear, first connect the flange 8 (D state), then disconnect the intermittent clutch 5 while keeping the clutch 8 connected. (state E), then connects the intermittent clutch 9 (state F 8), and then disconnects the clutch device 8 (state C). It will be in a locked state from that moment on.

Therefore, at the initial stage of switching to 2nd speed (CD, E state), from the output shaft lot to the intermediate shaft 7 → clutch gear @ 8 → driven gear shaft 2 → 2nd speed drive gear 22 → 2nd speed driven It passes through the driving gear 32 → synchronizer 60 → clutch hub 61 and is transmitted to the driven gear shaft 3, then passes through the F state, and in the final second speed state, it is transmitted from the output shaft 101 to the intermediate shaft 7 → The power is transmitted from the one-way clutch 6 to the intermittent clutch 9 to the drive gear shaft 2 (the following is the same drive transmission path as described above).

(d) 2nd gear → 3rd gear To switch from 2nd gear to 3rd gear, first connect the clutch device 4 (H state), then, while keeping the clutch device 4 connected, turn the intermittent clutch 9. Cut (I-shape 8)
Then, the disconnection clutch 5 is connected (J state), and the clutch device 4 is further disconnected (K state).The one-way clutch 6 is in the locked state from the time the disconnection flange 5 is connected. become.

Note that the gear piece 53 of the synchronizer 50 is in the second gear F.
It is engaged in advance when in the state.

Therefore, at the initial stage of switching to third speed (R, I state), from output shaft 101 to clutch device 4 → drive gear shaft l → third speed drive gear 23 → third speed driven gear 33 → synchronizer It is transmitted from the device 50 to the clutch hub 51 to the driven gear shaft 3, and then passes through the J state, and in the final third speed state, from the output shaft 101 to the intermediate shaft 7 to the one-way clutch 6 to the intermittent clutch. 5 → is transmitted to the drive gear shaft l (the following is the same drive transmission path as described above).

(E) 3rd gear → 4th gear Switching from 3rd gear to 4th gear is performed by connecting the clutch device 8 and engaging the gear piece 63 of the synchronizer 60 (L state). ,
One-way clutch 6 is in a free state.

It should be noted that the gear piece 63 has been engaged in advance in the J state of the third speed, and is brought into operation at the same time as the clutch device 8 is connected.

Therefore, in the switching state to the fourth speed, from the output shaft 101 to the intermediate shaft 7 → the clutch 8 → the drive gear shaft 2 → the fourth speed drive gear 24 → the fourth speed driven gear 34 → the synchronizer 60 → the clutch hub 61 The signal is then transmitted to the driven gear shaft 3.

(f) Reverse stage Reverse stage is performed by connecting the clutch device 4 and simultaneously meshing the intermediate gear 27 with the reverse driving gear 25 and the reverse driven gear 35.

Therefore, the power transmission progress in reverse gear is output shaft 101 → clutch device 4 → drive gear shaft l → reverse drive gear 25 → intermediate gear 27 → reverse driven gear 35 → clutch hub 51
→ Becomes the driven gear shaft 3.

As described above, the upshift to the high speed gear is performed in the A→L sequence.

In addition, downshifts to low gears are performed using the L-A procedure, and downshifts that require engine braking are performed using the L-A procedure.
-J → Engineering → H (4th gear → 3rd gear), H → F-E4D (3rd gear →
2nd speed) and D+B (2nd speed → 1st speed).

Next, a second embodiment shown in FIG. 2 will be described.

In this embodiment, a one-way clutch 6, disconnection clutches 5 and 9 in series with the one-way clutch 6, and a clutch device 4.8 in parallel with the one-way clutch 6 are arranged near an internal combustion engine 100. This is an example of the arrangement.

Note that the other configurations are the same as those in the first embodiment, so the same reference numerals are given to one drawing and the explanation will be omitted.

Also in this second embodiment, as in the first embodiment, clutch devices 4, 8, intermittent clutches 5, 9, synchronizer 5,
By the connection or engagement of 0.60, four forward speeds and one reverse speed are achieved.

This second embodiment is particularly applicable to vehicles that are restricted by the axial direction 1 method, such as front-wheel drive vehicles (front-engine, front-drive vehicles).

This is useful because the size of the entire barb can be significantly shortened.

Next, a third embodiment shown in FIG. 3 will be described.

In this embodiment, a drive gear shaft 2 is provided parallel to the drive gear shaft 1, and the drive gear shaft 2 is connected to the drive gear shaft 2 via mutually meshing gears 11, 12, 13, a connecting shaft 14, and a clutch device 8. It is connected to the intermediate shaft 7 that is directly connected to the output shaft 101 of the internal combustion engine 100 .

Note that the other configurations are the same as those in the first embodiment, so the same reference numerals are used in the drawings and explanations thereof will be omitted.

Also in this third embodiment, as in the first embodiment, a clutch device 4.8, an intermittent clutch 5.9, a synchro device 5
By connecting or holding 0.60, four forward speeds and one reverse speed are achieved.

This third embodiment is suitable for cases where it is difficult to arrange the synchronizers on the same axis.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, in each embodiment, instead of the clutch device 4,
By using a well-known fluid transmission device with a direct coupling clutch (torque converter, fluid coupling, etc.), forward and reverse starting may be performed smoothly without requiring any delicate latch operations.

Furthermore, the number of gears may be increased by adding a new gear train and synchronizer as necessary.

(Effects of the Invention) As explained above, in the gear type transmission of the present invention, one one-way clutch is provided in all power transmission systems, and this one-way clutch is selectively shared. Because of this configuration, it is possible to have a simple mechanism as a transmission, and in terms of size, by having only one one-way clutch, it is possible to achieve the effect of shortening and downsizing.

[Brief explanation of drawings]

FIG. 1 is a skeleton diagram showing a gear type transmission device according to a first embodiment of the present invention, FIG. 2 is a skeleton diagram showing a device according to a second embodiment, and FIG. 3 is a skeleton diagram showing a device according to a third embodiment. 1.2... Drive gear shaft (input shaft) 3... Driven gear shaft (output shaft) 4... Clutch device (clutch) 5... Intermittent clutch 6... One-way clutch 7... Intermediate shaft 8...Clutch device (clutch) 9...Intermittent clutch patent application Nissan Motor Co., Ltd.

Claims (1)

[Claims] 1) A plurality of power transmission systems each having a pair of transmission gears between an input shaft and an output shaft are provided, and the rotational speed of the input member is increased to exceed the rotational speed of the output member in the plurality of power transmission systems. A gear type transmission including a one-way clutch that transmits power only when the one-way clutch is connected in series to the one-way clutch, and a clutch connected in parallel to the one-way clutch, A gear type transmission device characterized in that all power transmission systems have one one-way clutch and this one one-way clutch is selectively shared.