JPS6127354A - Supporting mechanism for power transmission mechanism in 4-wd speed changer - Google Patents

Abstract

PURPOSE:To improve the durability by positioning a rotation transmitting member through a spacer and a fixing tool thereby facilitating fixing and positioning of rotation transmitting member and a sleeve while preventing rattling in axial direction. CONSTITUTION:A sleeve 61 is fitted rotatably over the outercircumference of first output shaft 3 for driving one of the front or rear wheel. Said sleeve 61 will transmit the power for driving the other of the front or rear wheel through a rotation transmitting member 62 to second output shaft. Said member 62 is spline fitted in the sleeve 61. The inner race 611A of a bearing 611 for holding the sleeve 61 is positioned by the stopping section 614. A positioning spacer 622 is provided between the inner race 611A and the rotation transmitting member 62. The opposite side from the spacer 622 is positioned and fixed through a fixing tool 623.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field] The present invention relates to a support mechanism for a power transmission mechanism that transmits power from an output shaft on one side to an output shaft on the other side in a four-wheel drive transmission.

[Prior Art] Conventionally, the support mechanism of the power transmission mechanism of a four-wheel drive transmission is
A spline is provided on the outer periphery of a sleeve that is slidably held on the outer periphery of the output shaft to one side that transmits power to the drive shaft on one side of the front wheel or the rear wheel, and the spline is connected to the drive shaft on the one side. By spline fitting the sprocket wheel, which is a rotary transmission member that transmits power to the output shaft on the other side, which transmits power to the drive wheel on the other side, and fixing the snap ring from one side after the spline fitting. It supported the sprocket wheel. Further, bearings are disposed between the transmission cases on the outer periphery of the sleeve in order to slidably support the sleeve on the outer periphery of the output shaft on one side, and the sleeve has one end attached to the bearings. Abut against each other to provide axial support in one direction,
The axial support in the other direction was supported by further other members via thrust bearings. However, in the conventional support mechanism of the power transmission mechanism of a four-wheel drive transmission, the sleeve that supports the sprocket wheel is supported in the axial direction by a plurality of members via bearings. This tends to cause looseness in the axial direction, which causes noise when the chain is driven and reduces the durability of the chain.

[Object of the Invention] An object of the present invention is to provide a spacer for positioning a rotary transmission member that is spline-fitted to the outer periphery of a sleeve rotatably disposed on the outer periphery of an output shaft on one side, and a spacer for the rotary transmission member. By providing a fitting for fixing the rotary transmission member from the opposite side, the rotary transmission member and the sleeve can be easily installed and positioned, and axial wobbling can be prevented.
An object of the present invention is to provide a support mechanism for a power transmission mechanism of a four-wheel drive transmission that prevents noise generation and improves durability as well as improves ease of assembly.

[Structure of the Invention] The support mechanism of the power transmission mechanism of the four-wheel drive transmission of the present invention includes an output shaft on one side that drives one of the front wheels or the rear wheels, and an outer periphery of the output shaft on the one side. A sleeve is rotatably held in the transmission case via a bearing and transmits power to the output shaft on the other side that drives the other of the front wheels or the rear wheels, and a spline is attached to the spline provided on the outer periphery of the sleeve. a rotary transmission member that is fitted and transmits power to the other drive shaft; a spacer that is interposed between the inner race of the bearing and the rotary transmission member and positions the rotary transmission member; a first locking means that locks the inner race of the bearing on a side opposite to the side where the spacer is installed; and a second locking means that locks the rotating member on the side opposite to the side where the sleeve is installed. and stop means.

[Effects of the Invention] The support mechanism for the power transmission mechanism of the four-wheel drive transmission of the present invention having the above configuration has the following effects.

b) The rotary transmission member is in contact with one side through a spacer that positions the rotary transmission member, and the other side is held by a fixture that fixes the rotary transmission member, so when the rotary transmission member is driven, Since the rotary transmission member is driven without rattling in the axial direction, chain noise caused by rattling of the rotary transmission member can be prevented and durability can be improved.

口) A sprocket wheel assembly that is installed via a spacer that positions the rotary transmission member that fits with the spline on the outer circumference of the sleeve that is rotatably arranged around the outer circumference of the output shaft on one side. [Embodiment] Next, a support mechanism for a power transmission mechanism of a four-wheel drive transmission according to the present invention will be described based on an embodiment shown in the drawings.

FIG. 1 is a sectional view of a four-wheel drive automatic transmission to which the support mechanism of the power transmission mechanism of a four-wheel drive transmission of the present invention is applied;
The figure shows a partially enlarged view with dimensions 1°.The auxiliary transmission 1 has an input shaft 2 that is the output shaft of a main transmission (not shown), and a rear wheel shaft that is one output shaft that is arranged in series with the input shaft 2. The first to drive
An output shaft 3, a planetary gear device 4 disposed between the input shaft 2 and the first output shaft 3, and a front wheel shaft that is the other output shaft disposed parallel to the first output shaft 3. The power of the second output shaft 5 to be driven and the sleeve 61 for four-wheel drive that is slidably fitted on the outer periphery of the first output shaft 3 is transferred to the second output shaft 5.
and a transmission mechanism 6 for transmitting data to the planetary gear system M4.
A sun gear 401 spline-fitted to the outer circumference of the rear end of the input shaft 2, and a pinion 40 meshing with the sun gear 401.
2. Consists of a ring gear 403 that meshes with the pinion 402, a carrier 404 that rotatably holds the pinion 402 and is connected to the outer periphery of the tip of the first output shaft 3, and the engagement of the sun gear 401 and the carrier 404. Clutch C1 and sub-shift v! It is comprised of eleven sub-transmission cases 7, a brake Bl that engages and disengages the ring gear 403, and a clutch C2 that engages and disengages the first output shaft 3 and the sleeve 61.

The transmission mechanism 6 includes a sleeve 61 that is rotatably fitted around the outer periphery of the first output shaft 3, a sprocket wheel 62 that is a rotary transmission member provided on the outer periphery of the sleeve 61, and a sprocket wheel 62 that corresponds to the sprocket wheel 62. and the second output shaft 5
The sleeve 61 consists of a sprocket 63 integrally provided on the outer periphery of the sleeve 61 and a chain 64 that transmits power from the sprocket wheel 62 to the sprocket 63.
is slidably supported on the outer periphery of the first output shaft 3, and one end side (left side in the figure) is slidable on the outer periphery of the inner cylinder of the hydraulic cylinder 15 of the clutch C2 whose inner periphery is formed in an annular shape. The outer periphery is supported via the inner periphery of the support part 71 of the sub-transmission i case 7 via a ball bearing 611, and the inner periphery of the other end (right side in the figure) is the outer periphery of the first output shaft 3. The outer periphery is connected to the support part 7 of the sub-transmission case 7.
It is supported via the inner periphery of No. 2 and a roller bearing 612. The ball bearing 611 is composed of an inner race 611A held on the outer periphery of the sleeve 61, an outer race 611B held on the inner periphery of the support portion 71, and balls 611C arranged between the inner race 611A and the outer race 611B. , inner lace 6
One side (the left end surface in the figure) of the sleeve 61 is locked by a stepped portion 614 that is a first locking means provided on the outer periphery of the sleeve 61. Sprocket wheel 62 is sleeve 61
A spacer 622 is fitted onto a spline 621 provided on the outer periphery of the sprocket wheel 62 and is placed between the sprocket wheel 62 and the inner race 611A of the ball bearing 611 to determine the position of the sprocket wheel 62. It is fixed with a snap ring 623 which is a second locking means that supports it from any opposite side. One end (left side in the figure) of the spacer 622 contacts the inner race 611^ of the ball bearing 611,
A recess 622A is provided so that lubricating oil discharged from an oil passage 613 provided in the sleeve 61 to lubricate the ball bearing 611 can be supplied to the ball bearing 611.
The other end (right side in the figure) contacts the sprocket wheel 62, and the inner periphery of the other end is spline-fitted with the spline 621 of the sleeve 61. Oil seals 624 and 625 are arranged on the inner and outer peripheries of the spacer 622 to prevent the lubricating oil supplied to the ball bearings 611 from flowing out and flowing into the chain case 65.

Clutch C1 is a wet multi-disc friction engagement clutch that is disposed on the auxiliary transmission case 7 side of planetary gear device 4 and connects and disconnects sun gear 401 and gear rear 404.
4, the pawl 9 is connected to the parking gear 8 in sliding contact with the parking gear 8 at the outer peripheral side thereof, and the pawl 9 meshes with the parking gear 8 when the shift lever of the automatic transmission is selected to the parking position. A hydraulic servo C-
1.

The brake B1 is a wet multi-plate friction engagement brake for engaging the ring gear 403 with the auxiliary transmission case 1, and the brake cylinder 1 is formed on one side of the center support 73.
3 and a brake piston 14 mounted within the brake cylinder 13, and is operated by a hydraulic servo 3-1.

Clutch C2 is a wet multi-disc friction engagement clutch for connecting and disconnecting the first output shaft 3 connected to the carrier 404 and the sleeve 61 of the transmission mechanism 6 for driving the second output shaft 5. It is composed of a hydraulic cylinder 15 rotatably supported on the outer periphery of an inner cylinder, and a clutch piston 16 mounted inside the hydraulic cylinder 15.
-2 is activated.

17 are hydraulic servos C-1 and C- of the clutch C11, clutch C2, and brake B1 of the sub-transmission 1 for four-wheel drive.
A sub-transmission valve body is provided with a sub-transmission hydraulic control device 170 for supplying and discharging hydraulic oil to and from B-1 and B-1.
71 is its oil pan.

Hydraulic oil supplied to the hydraulic servos C-1, C-2 and [3-1 is used for sub-transmission hydraulic control via an oil passage 172 provided in communication with the main transmission case and the sub-transmission case 7. It is led to an auxiliary transmission valve body 17 provided within the device 110.

During normal driving, line pressure is supplied to the hydraulic servo C-1 through the oil passage 18 to engage the clutch C1, and the hydraulic servo B-1 is engaged.
-1 and C-2 to release brake B1 and clutch C2. This connects the sun gear 401 and carrier 404 of the planetary gear system 4, and the power is transferred to the input shaft 2.
is transmitted only to the first output shaft 3 at a reduction ratio of 1, resulting in a two-wheel drive driving state with only the rear wheels. At this time, the power from the input shaft 2 is transmitted from the carrier 404 to the first output shaft 3 via the coupling member 19 fixed to the sun gear 401 and the clutch C1 without passing through the pinion 402 and ring gear 403. At this time, when the driver desires four-wheel drive driving, he manually shifts a shift lever (not shown) provided on the driver's seat, etc., and the auxiliary transmission hydraulic control device 170 operates to shift the hydraulic servo C-2. When line pressure is gradually supplied and clutch C2 is engaged, first output shaft 3 and sleeve 61 rotate at the same time, sprocket wheel 62 and chain 6
4 and the sprocket 63 to the second output shaft 5.
The power is transmitted from the input shaft 2 to the first output shaft 3 and the second output shaft 5 at a reduction ratio of 1, and a four-wheel drive directly coupled driving state is obtained. During this four-wheel drive driving, when the shift lever is manually shifted when an increase in output torque is required, such as on a steep slope, line pressure is gradually supplied to the hydraulic servo 8-1, and at an appropriate timing, the line pressure is supplied to the hydraulic servo C-1. The hydraulic pressure is discharged, the brake B1 is engaged, and the clutch C1 is released. As a result, Sungear 401 and Carrier 40
4 is released, the ring gear 403 is fixed to the auxiliary transmission case 7, and the power is decelerated from the input shaft 2 via the sun gear 401, pinion 402, and carrier 404 to the first gear.
The power is transmitted to the output shaft 3 and the second output shaft 5, and a low-speed four-wheel drive state with a large reduction ratio is obtained.

Table 1 shows the manual shift setting range of the sub-transmission, the engagement and disengagement of the clutches C1 and C2, the brake B1, and the running state of the vehicle.

Table 1 In Table 1, O indicates the leading state of the frictional engagement element, and × indicates the released state. The reduction ratio r indicates the number of teeth of the sun gear 401 of the planetary gear device 4/the number of teeth of the ring gear 403.

In this embodiment, 7 of the rear ends of the spacer 622 (on the right side in the figure)
Since the spacer 622 and the sleeve 61 are spline-fitted with the spline 621 of the sleeve 61 at the periphery, the spacer 622 and the sleeve 61 are made concentric, so that dragging with the oil seals 624 and 625 can be reduced.

In this embodiment, power is transmitted between the sprocket wheel 62 and the sprocket 63 of the second output shaft 5 through the chain 64, but the power may be transmitted through other gears.

FIG. 3 shows another embodiment of the invention.

This embodiment has a sprocket wheel 62 and a spacer 622.
A nut 626 is applied to the second locking means that supports the side opposite to the side on which the spacer 622 of the sprocket wheel 62 is disposed. This further reduces axial wobbling.

In the above embodiment, the support mechanism of the power transmission mechanism of the four-wheel drive transmission of the present invention is a part-time four-wheel drive transmission in which two-wheel drive and four-wheel drive can be switched by switching the engagement and disengagement of clutch C2. Although an example in which the present invention is applied to a vehicle is shown, the present invention may also be applied to a full-time four-wheel drive transmission that constantly transmits power to four wheels.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an auxiliary transmission equipped with a support mechanism for the power transmission m mechanism of a four-wheel drive transmission of the present invention, Fig. 2 is a partially enlarged view of the auxiliary transmission shown in Fig. 1, and Fig. 3. 1 is a partially enlarged view of a sub-transmission showing another embodiment of a support mechanism of a power transmission mechanism of a four-wheel drive transmission. In the figure 3...First output shaft 5...Second output shaft 6.
...Transmission mechanism 61...Sleeve 62...Sprocket wheel 611...Pole bearing rig 611
^...Inner lace 611B...Outer lace 611C...Ball 614...Step 62
1... Spline 622... Spacer 623...
・Snap ring 624.625...Oil seal 6?6...Nut

Claims (1)

[Claims] 1) One side output shaft that drives one of the front wheels or the rear wheels, and a front wheel that is rotatably held in the transmission case via a bearing on the outer periphery of the one side output shaft. Or a sleeve that transmits power to the output shaft on the other side that drives the other wheel of the rear wheels, and a rotation transmission that is spline-fitted to a spline provided on the outer periphery of the sleeve and transmits power to the drive shaft on the other side. a spacer interposed between a transmission member, an inner race of the bearing, and the rotary transmission member for positioning the rotary transmission member; 4 consisting of a first locking means for locking the race, and a second locking means for locking the rotating member on the opposite side to the side where the spacer is provided.
A support mechanism for the power transmission mechanism of a wheel drive transmission. 2) A support mechanism for a power transmission mechanism of a four-wheel drive transmission according to claim 1, wherein the spacer is provided separately from the rotary transmission member. 3) The power transmission mechanism for a four-wheel drive transmission according to claim 2, wherein the spacer is partially spline-fitted to a spline provided on the outer periphery of the sleeve. support mechanism. 4) A support mechanism for a power transmission mechanism of a four-wheel drive transmission according to claim 1, wherein the spacer is formed integrally with the rotary transmission member. 5) The rotary transmission member is a sprocket wheel that transmits power via a chain to an output sprocket provided on the outer periphery of the other drive shaft. A support mechanism for the power transmission mechanism of a wheel drive transmission. 6) The power of the four-wheel drive transmission according to claim 1, wherein a recess is provided on the side of the spacer that contacts the inner race to supply lubricating oil to the bearing. Support mechanism for transmission mechanism. 7) The first locking means is a stepped portion provided on the outer periphery of the sleeve that locks a surface of the inner race of the bearing opposite to the side on which the spacer is disposed. A support mechanism for a power transmission mechanism of a four-wheel drive transmission according to claim 1. 8) The second locking means is a snap ring that locks a surface of the rotary transmission member opposite to the side on which the spacer is provided. A support mechanism for a power transmission mechanism of the four-wheel drive transmission described above. 9) A patent characterized in that the second locking means is a nut that locks by pressing toward the spacer from a surface of the rotary transmission member opposite to the side on which the spacer is disposed. A support mechanism for a power transmission mechanism of a four-wheel drive transmission according to claim 1.