JPS6119232Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a transmission system for an automobile, more specifically, it is equipped with a torque converter built into a housing, and a hydraulically actuated transmission mechanism built into a transmission case. The present invention relates to a transmission device for an automobile that supports a reduction drive gear and a reduction driven gear that meshes with the reduction drive gear.

Generally, in this type of transmission, oil is loaded into the inner bottom of the case to the extent that a portion of the outer periphery of the driven gear is immersed in order to lubricate various gears, and the inner bottom of the case is filled with oil to the extent that a portion of the outer circumference of the driven gear is immersed. A valve mechanism is provided for operating the mechanism, and the oil is sucked into the inside through a strainer of the valve mechanism,
The oil is switched by a valve mechanism to operate the transmission mechanism.

Therefore, in the transmission, the oil is stirred by the driven gear, and the oil foams.
There is a risk that this foam will be drawn into the valve mechanism from the strainer.

Therefore, in the past, the amount of oil loaded into the case was increased to prevent the valve mechanism from sucking in bubbles, but this method not only increased the amount of oil required, but also increased the amount of oil loaded into the case. As the oil level within the case rose, the oil resistance of the driven gear increased, causing power loss.

This invention was devised in view of the above problems, and can prevent bubbles from being sucked into the valve mechanism from the oil strainer without increasing the amount of oil, and minimizes power loss by reducing the resistance of the driven gear. It is an object of the present invention to provide a transmission device in which the oil strainer can be arranged close to the driven gear.

More specifically, it includes a torque converter built into a housing, a hydraulically actuated transmission mechanism built into a transmission case, a reduction drive gear at the joint between the case and the housing, and a reduction drive gear meshed with the drive gear. In the automobile transmission supporting a reduction driven gear, an arcuate oil turning plate is attached to the case to cover the outer periphery of the open side of the reduction driven gear, and the oil turning plate faces the reduction driven gear with the oil turning plate sandwiched therebetween. The present invention is characterized in that a valve mechanism having an oil strainer is disposed close to the oil strainer, and the oil diverting plate is provided with a branching diverting plate that covers the side of the oil strainer.

The present invention will be explained below based on the embodiments shown in the drawings.

In the automobile transmission shown in the drawing, a housing 3 containing a torque converter 2 is attached to the open side of a transmission case 1 in abutting manner, and the case 1 and the housing 3 are interlocked and connected to the torque converter 2. A hydraulically actuated transmission mechanism 5 is provided on the input shaft 4 in the case 1, and a reduction gear is provided on the input shaft 4 at the joint of the case 1 and the housing 3. A transmission drive gear 6 is provided so that rotational power input from the torque converter 2 to the input shaft 4 is extracted to the drive gear 6 via the transmission mechanism 5.

Further, boss portions 1a and 3a are provided near the joints of the case 1 and the housing 3, respectively, and an idler shaft 7 is supported on the boss portions 1a and 3a, and a large diameter first reductor is provided on the outer periphery of the shaft 7. A reduction driven gear 8 and a small diameter second reduction driven gear 9 are provided to rotate freely.
A differential gear mechanism 10 in which the driven gear 8 is meshed with the drive gear 6, and the second driven gear 9 is installed inside the housing 3.
It is meshed with the third reduction driven gear 11 provided in the.

In the embodiment shown in the figure, an oil passage portion 1b is formed on the mating surface side of the case 1 at a position close to the first driven gear 8 as shown in FIG. As shown in the figure, a valve body 12 for operating the transmission mechanism 5 is provided, and a pressure regulator valve (not shown) and a manual valve 14 are provided inside the body 12, and a strainer is provided on the lower surface side of the valve body 12. 15, and the strainer 15 was connected to the suction port of the oil pump 30 and loaded into the case 1 to an oil level a shown in FIG. 3 so that a part of the outer circumference of the first driven gear 8 was immersed. sucking oil into the oil pump 30;
By switching the oil passages in conjunction with the operation of the manual valve 14, the transmission mechanism 5 is switched.

Further, a semi-circular oil turning plate 16 having a diameter larger than that of the first driven gear 8 is formed, and this turning plate 1
6 is attached to the outer circumference of the first driven gear 8 on the open side opposite to the meshing side with the drive gear 6 so as to cover the first driven gear 8, and the turning plate 16 is attached to the outer circumference of the first driven gear 8 on the open side opposite to the meshing side with the drive gear 6. and the strainer 15.

Further, a side plate 17 that stands perpendicular to the turning plate 16 is integrally provided on one side in the width direction located below the oil level a on a part of the outer periphery of the turning plate 16. 17, the first
It is made to cover the side of the driven gear 8,
Further, at a position below the oil level a on the outer circumference of the turning plate 16 and at a position forward in the rotational direction of the first driven gear 8, a branch turning plate 19 having a side plate 18 is installed outward in the radial direction to cover the sides of the strainer 15. These turning plates 16 and 19 regulate the flow of oil accompanying the oil stirring of the first driven gear 8 in the same direction as the rotational direction of the first driven gear 8. Bubbles generated by oil agitation are removed from the strainer 15.
This was done to prevent the particles from being sucked into the valve body 12.

The turning plate 16 has a mounting piece 20 at one end and is fixed to the case 1 with a bolt 21, and the other end is locked to a rib 1c provided on the mating surface side of the case 1. The tip is supported by being engaged with a rib 1d provided on the mating surface side of the case 1.

The transmission of the present invention has the above configuration,
The oil sucked from the strainer 15 is switched by the manual valve 14 in the valve body 12, and the transmission mechanism 5 is operated to change the speed, and the transmission mechanism 5 receives the input shaft 4 from the torque converter 2.
The rotational power of It is transmitted from the gear mechanism 10 to the axle.

As the first driven gear 8 rotates, the oil in the case 1 is agitated and bubbles are generated. Said first
The turning plate 16 is installed to cover the driven gear 8 and is interposed between the outer periphery of the first driven gear 8 and the upper part of the strainer 15, and a side plate 18 is provided radially outward of the turning plate 16. A branch turning plate 19 is provided, and the branch turning plate 19 covers the sides of the strainer 15,
Therefore, the stirring flow of oil a by the first driven gear 8 is regulated by the turning plates 16 and 19, and the bubbles generated by the stirring are not sucked into the valve body 12 from the strainer 15.

As explained above, the present invention includes a torque converter built into a housing, a hydraulically actuated transmission mechanism built into a transmission case, and a reduction drive gear at the joint between the case and the housing. In the transmission device for an automobile supporting a reduction driven gear that meshes with the reduction driven gear, an arcuate oil turning plate that covers the outer periphery of the open side of the reduction driven gear is attached to the case, and the reduction drive gear that sandwiches the oil turning plate is attached to the case. A valve mechanism having an oil strainer is disposed in close proximity to the position facing the driven gear, and the oil turning plate is provided with:
Since the branching and turning plate covering the side of the oil strainer is provided, even though the oil strainer is placed close to the reduction driven gear, the agitation flow of oil accompanying the rotation of the driven gear is regulated in the direction of rotation of the driven gear. This makes it possible to prevent the agitation flow from flowing toward the strainer and to reliably prevent bubbles generated by oil agitation from being sucked into the valve mechanism from the strainer. Since it can be placed close to the transmission driven gear, the transmission can be made smaller at the same time.

Furthermore, in the present invention, since the turning plate prevents bubbles from being sucked into the valve body, the amount of oil can be reduced without increasing the amount of oil loaded into the transmission case as in the conventional case. As the oil amount decreases, the oil resistance of the driven gear can be reduced.

Moreover, the oil agitation accompanying the rotation of the driven gear is performed in a small space surrounded by the turning plate, and the flow of the agitated oil is regulated in the rotational direction of the driven gear. Stirring resistance can be reduced, and power loss can be reduced together with the effect of reducing the resistance due to the oil of the driven gear due to the reduction in the amount of oil loaded as described above.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the transmission of the present invention, Fig. 2 is a side view seen from the mating surface of the transmission case, and Fig. 3 is a valve body assembled into Fig. 2, with a part thereof omitted. FIG. 3 is a side view of the vehicle with the gears assembled therein. 1... Transmission case, 2... Torque converter, 3... Housing, 5... Transmission mechanism, 6... Drive gear, 8, 9, 11... Driven gear, 16... Turning plate.

Claims (1)

[Scope of utility model registration request] A torque converter installed inside the housing,
A transmission for an automobile, comprising a hydraulically operated transmission mechanism housed in a transmission case, supporting a reduction drive gear at a joint between the case and the housing, and a reduction driven gear meshing with the drive gear, An arc-shaped oil turning plate that covers the outer periphery of the open side of the reduction driven gear is attached to the case, and a valve mechanism having an oil strainer is arranged in close proximity to a position facing the reduction driven gear with the oil turning plate sandwiched therebetween. 1. A transmission for an automobile, characterized in that the oil turning plate is provided with a branching turning plate that covers a side of the oil strainer.