JPH0315052B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic transmission device for driving a vehicle having a trigger means for starting an engine.

In this type of device, a trigger for starting the engine is provided on the output shaft and the driven shaft connected via a one-way clutch, but when the engine is started by the trigger and the vehicle is moved backwards, that is, the vehicle is pushed backwards by hand. It is desired that the one-way clutch engages with less shock when moving from the forward position to improve its durability and enable a smooth start.

The object of the present invention is to obtain such a device, and in an automatic transmission in which a driven shaft connected to a low-speed transmission system is connected to an output shaft connected to a high-speed transmission system via a one-way clutch, the one-way clutch comprises: A cam member formed at one end of a cylindrical portion that is fitted into the driven shaft, a retainer that holds a roller that engages with the cam member, and an outer on the output side that supports the roller of the retainer from the outer periphery. A friction spring for controlling the range of movement of the roller relative to the cam member is wound around a cylindrical part integral with the cam member, and one end of the friction spring is engaged with the retainer.

An example of implementing the present invention will be explained based on the drawings.
is a vehicle engine, 2 is a crankshaft, a low-speed transmission system and a high-speed transmission system are formed on the shaft 2; A low-speed clutch outer 5 to which the weight 4 is pressed by centrifugal force, a planetary gear 7 that meshes with a ring gear 6 formed on the inner peripheral surface of the outer 5, and a carrier 8 that supports the gear 7. A supported second speed clutch weight 9 and a low speed shift shaft 1 interlocked with the carrier 8
0 and a sun gear 11 that meshes with the planetary gear 7.
The sun gear 11 has a ratchet-type one-way engagement means 12 for locking to the case.
and a counterweight 13 are provided,
The low speed gear shift shaft 10 is a one-way clutch 1.
4, and its high-speed transmission system includes a high-speed clutch outer 15 provided on the low-speed transmission shaft 10, a third-speed clutch weight 16 that is pressed against the outer 15 by centrifugal force, and a high-speed clutch outer 15 provided on the low-speed transmission shaft 10; It is composed of a high-speed speed change shaft 17 that pivotally supports a weight 16. Reference numeral 18 indicates an output shaft, and the output shaft 18 has a high-speed gear 19 that meshes with the gear of the high-speed transmission shaft 17 at one end thereof, and an output gear 21 that meshes with the gear of the counter shaft 20 at the other end. death,
A driven shaft 23 having a low-speed gear 22 at one end that meshes with the gear of the low-speed transmission shaft 10 is rotatably supported in the middle thereof, and the driven shaft 23 has a cylindrical portion fitted into the driven shaft 23. Cam member 2 formed at one end
4, an outer 25 connected to the output shaft 18, a roller 26 that engages with the cam member 24, and the roller 26.
It is connected to the output shaft 18 via a one-way clutch 28 consisting of a retainer 27 that holds the cam member 24, and a first friction spring 29 that is tightened by rotation in one direction is wound around the outer periphery of the cylindrical part that is integrated with the cam member 24. One end thereof is locked to the retainer 27. 30 indicates a hard axis, and the axis 30
is the drive gear 32 that meshes with the kit ratchet 31.
A hard driven gear 34 meshing with the gear 32 via an idle gear 33 is connected and supported by the driven shaft 23 via a lost motion mechanism 35, and the gear 34 is integrally connected to the retainer 27. A sub-gear 36 having fewer teeth than the hard driven gear 34 is meshed with the idle gear 33, and the gear 36 is connected to the first friction spring 29.
It is supported by the driven shaft 23 via a second friction spring 37 having a weaker spring force. In the figure, numeral 38 indicates a washer for receiving the spring 37.

Since the present invention is configured as described above, when the kick shaft 30 is rotated at the time of starting, the kick driven gear 34 and the sub gear 36 are rotated via the gears 32 and 33. Due to this resistance, the second friction spring 37 slips, causing the hard driven gear 34 and the retainer 27 integrated therewith to move forward in the direction of arrow A in FIG. , the one-way clutch 28 is disengaged to cut off power transmission to the counter shaft 20, and the transmission from the driven shaft 23 to the low-speed gear 22 and the low-speed transmission shaft 1
0, crankshaft 2 via one-way clutch 14
to drive. During this time, the parts after the one-way clutch 28 are not driven, so the tightening force is reduced.

When the engine 1 starts and the driven shaft 23 rotates, the retainer 27 is driven slightly behind the cam member 24 via the idle gear 33 at the gear ratio of the sub gear 26 and the hard driven gear 34, and the roller 26 is driven slightly behind the cam member 24. When the vehicle touches the mountain, the one-way clutch 28 is in the engaged state.

When the one-way clutch 28 is engaged and the first gear clutch is disengaged, when the gear is rotated backwards, the one-way clutch 28 remains locked and is driven in the reverse direction from the wheel side, and attempts to rotate clockwise in FIG. 3. . Now, in the same figure, the first friction spring 2
Considering that there is no 9, one-way clutch 2
8 is rotated in the opposite direction from the cam member 24 to the driven shaft 2.
3, the friction force of the second friction spring 37 drives the sub gear 36, and the driven gear 34 is driven in the same direction from the sub gear 36 via the idle gear 33. Therefore, the rotation of the gear 34 is delayed, and as shown in FIG.
35b, the retainer 27 integrated with the hard driven gear 34 and the roller 26 held therein
rotates clockwise later than the cam member 24,
As shown in FIG. 5, the clutch 28 is released.

In this state, when the first speed clutch 4 is connected and the driven shaft 23 and the cam member 24 rotate forward, that is, in the direction A in FIG. However, it appears as a shock when starting.

However, due to the clockwise rotation of the cam member 24, a friction force in the winding direction acts on the first friction spring 29, causing it to rotate integrally, and its protruding end rotates the retainer 27 in the same direction, causing the roller 2
6 is held in a state in which it is substantially in contact with the peak of the cam member 24. Therefore, when the rotation of the engine 1 is increased and the driven shaft 23 is driven in the direction of arrow A, the cam member 2
4. Even if there is a slight play in the contact area between the roller 26 and the outer 25, the play in the retainer 27 is removed by the drive system of the sub gear 36, idle gear 33, and hard driven gear 34, and the one-way clutch 28 is immediately brought into the connected state. , and almost no shock occurs.

According to the present invention, the one-way clutch 28 that connects the driven shaft 23 of the low-speed transmission system and the output shaft 18 of the high-speed transmission system is connected to a cam formed at one end of a cylindrical portion that is fitted into the driven shaft. Part 2
4, a retainer 27 that supports a roller 26 that engages with the cam member 24, and an outer 25 on the output shaft 18 side that supports the roller 26 of the retainer 27 from the outer periphery.
A friction spring 29 that restricts the movement range of the roller 26 relative to the cam member 24 is wound around a cylindrical portion integral with the cam member 24, and one end of the friction spring 29 is engaged with the retainer 27. roller 2 to the cam member from
The range of movement of the clutch 6 is regulated, and when starting after rearward handling with the engine hot, there is almost no shock caused by the one-way clutch 28 being jammed, which improves the durability of the clutch 28 and allows a smooth start. have an effect.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway side view, FIG. 2 is a system diagram thereof, FIG. 3 is a sectional view taken along line A-A in FIG. 1, and FIG. is B in Figure 1.
-B sectional view, FIGS. 5 and 6 are explanatory views thereof. 18... Output shaft, 23... Driven shaft, 26... Intermediate member, 27... Retainer, 28... One-way clutch, 29... First friction spring.

Claims (1)

[Claims] 1. In an automatic transmission in which a driven shaft connected to a low-speed transmission system is connected to an output shaft connected to a high-speed transmission system via a one-way clutch, the one-way clutch is connected to a cam formed at one end of a cylindrical portion that is fitted into the driven shaft. A friction spring that is formed of a member, a retainer that holds a roller that engages with the cam member, and an output side outer that supports the roller of the retainer from the outer periphery, and that restricts the range of movement of the roller with respect to the cam member. is wound around a cylindrical portion integral with the cam member, and one end of the cam member is engaged with the retainer.