JPH078922Y2 - Oil transmission device for automatic transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an oil suction device for an automatic transmission.

(B) Prior Art As a conventional oil intake device for an automatic transmission, for example, Japanese Patent Application Laid-Open No. 62-62
There is one disclosed in Japanese Patent No. 288774. In the oil suction device of the automatic transmission shown in this figure, a flexible tube is attached to the suction port in the oil reservoir, and a weight is attached to the lower end of this flexible tube. When the oil in the oil reservoir moves to one side due to acceleration due to vehicle acceleration, turning, braking, etc., the lower end of the flexible tube to which the weight is attached also moves in the same direction. This prevents inhalation of air from the suction port.

(C) Problems to be Solved by the Invention However, the above-described conventional oil suction device for an automatic transmission has the following problems. That is, since the movable range of the flexible tube is limited, if the oil in the oil reservoir moves largely due to acceleration, it will suck in air. Also, in order to provide a flexible tube that can move within a certain range to the intake port, it is necessary to have a sufficient dimension between the intake port and the bottom of the oil reservoir. It is difficult to be deep and it is not practical to place a flexible tube with sufficient range of motion in the oil reservoir. The present invention aims to solve such problems.

(D) Means for Solving the Problems The present invention solves the above problems by providing a lid member that closes a part of the inlet according to the acting acceleration.
That is, the oil suction device of the automatic transmission according to the present invention is
A lid member (20) that can partially close the intake port (18)
Is provided, the lid member is displaceable in accordance with the acting acceleration, and when the oil surface inclines from the horizontal plane due to an acceleration of a predetermined value or more, the lid member is located on the oil level lower side portion (18a) of the suction port. Or 18b) is configured to be closed.
The reference numerals in parentheses indicate the corresponding members of the first embodiment described later.

Further, it is also possible to provide a plurality of suction ports to have the following configuration. That is, a plurality of inlets (52, 54) are provided, and lid members (56, 58) capable of closing the inlets are provided.
The lid member is displaceable according to the acting acceleration, and the lid member provided at the suction port on the oil level lowering side when the oil surface is inclined from the horizontal plane due to the acceleration of a predetermined value or more acts. Only the chisel is configured to be displaced to the closed position. The reference numerals in parentheses indicate the corresponding members of the second embodiment described later.

(E) Action When acceleration acts on the vehicle, the oil in the oil reservoir moves in one direction. The lid member is also displaced by the action of acceleration. The lid member closes a part of the intake port on the upstream side (that is, the side where the oil is reduced) in the acceleration acting direction. As a result, the oil will be sucked from the remaining part of the suction port on the side where the oil has moved due to acceleration, and the open suction port will always be in the oil, preventing the intake of air. To be done. The same operation can be obtained with a plurality of suction ports provided with a lid member at each suction port.

(F) Embodiment (First Embodiment) FIGS. 1 to 3 show a first embodiment of the present invention. An oil reservoir 12 is attached to a lower portion of a casing 10 of the automatic transmission, and the oil reservoir 12 is filled with a predetermined amount of oil. Valve body 14 provided at the bottom of casing 10
The oil strainer 16 is fixed to the lower part of the. A suction port 18 is provided on the lower surface of the oil strainer 16. The suction port 18 is divided into a front portion 18a and a rear portion 18b by a lid member 20 provided at the center thereof. The lid member 20 can swing about a horizontal shaft 22 as a fulcrum, and has a front lid 20a, a rear lid 20b, and a weight 20c. The front lid 20a and the rear lid 20b are orthogonal to each other, and the weight 20c includes the front lid 20a and the rear lid 20b.
It is arranged to form an angle of 35 degrees. As a result, the lid member 20 has the front lid 20a in contact with the bottom of the oil strainer 16 and the rear lid 20b in the oil strainer 16
It is possible to swing 90 degrees between the state of contacting the bottom of the. A rubber member 24 is fixed to the bottom portion of the oil strainer 16 as a stopper, as shown in FIG.
With this rubber member 24, a sealing action and a shock absorbing action are obtained.

Next, the operation of this embodiment will be described. When acceleration is not applied to the vehicle, the oil surface 30 of the oil in the oil reservoir 12 is horizontal, and the suction port 18 is located below the oil surface 30. Further, since no acceleration acts on the weight 20c, the lid member 20 is in the state shown in FIG. 1 due to the gravity acting on the weight 20c. That is,
Both the front portion 18a and the rear portion 18b of the suction port 18 are in an open state. When the oil pump operates in this state, oil is sucked through the front portion 18a and the rear portion 18b of the suction port 18, and air is not mixed.

Next, when the vehicle rapidly accelerates and the acceleration acts, the oil in the oil reservoir 12 moves to the rear side as shown in FIG. 2 due to the acting acceleration. The acceleration also acts on the weight 20c, and the weight 20c rotates counterclockwise in FIG. 2 about the shaft 22 as a fulcrum, and closes the front portion 18a of the suction port 18 as shown in FIG. Therefore, the suction port 18 is in a state where only the rear portion 18b is opened. Since the rear portion 18b is located in the moving direction of oil, it is located below the oil surface 30. Therefore, without sucking air, the oil will
Inhaled through.

On the contrary, when sudden deceleration is performed, the acting direction of the acceleration is opposite to that described above, and the rear portion 18b of the suction port 18 is closed and the front portion 18a is opened. In this case, since the oil moves to the front side, the front portion 18a of the suction port 18 is held in the oil and air is not sucked.

(Second Embodiment) FIGS. 4 and 5 show a second embodiment. This second embodiment is 2
One suction port is provided in another place. That is,
The casing 10, the oil reservoir 12, the valve body 14, etc. are the same as in the first embodiment, but the strainer 50 is provided with two suction ports 52 and 54. The suction port 52 is arranged on the front side (left side in FIG. 4) of the vehicle, and the suction port 54 is arranged on the rear side. Lids on inlets 52 and 54 respectively
56 and 58 are provided. The lid member 56 has a plate portion 56a and a weight portion 56b capable of closing the suction port 52, and these can swing about a shaft 60 as a fulcrum. The plate portion 56a and the weight portion 56b are arranged in a relationship as shown in FIG. 4, and when the acceleration does not act, the suction port 52
Is set to open. Lid member 58
Also, although the structure is basically the same as that of the lid member 56, they are arranged so that the directions thereof are opposite to each other by 180 degrees.

When acceleration is not applied, the state is as shown in FIG. 4, and oil is sucked from both the suction port 52 and the suction port 54. On the other hand, when acceleration acts due to sudden acceleration,
As shown in FIG. 5, the suction port 52 is closed by the lid member 56. On the other hand, the suction port 54 is held open. Therefore, the oil is sucked only from the suction port 54 on the rear side where the oil moves, and the air is not sucked in, and the same operation as that of the first embodiment can be obtained.

Note that if the same components as the suction port 52 and the suction port 54 are arranged laterally, it is possible to cope with the movement of oil due to the acceleration generated when the vehicle turns. Further, the intake ports 52 and 54 may be arranged in a direction forming an angle of 45 degrees with respect to the vehicle center line so as to be able to deal with longitudinal acceleration and lateral acceleration.

(G) Effect of the Invention As described above, according to the present invention, a lid member that is displaceable by acceleration is provided to close a part of the suction port or a predetermined one of a plurality of suction ports. As a result, air can be prevented from being sucked from the suction port on the side where the oil decreases when acceleration is applied.

[Brief description of drawings]

FIG. 1 is a diagram showing an oil intake device for an automatic transmission according to a first embodiment, FIG. 2 is a diagram showing a state in which acceleration is applied to the oil intake device for an automatic transmission shown in FIG. 1, and FIG. FIG. 4 is a diagram showing the lid member in detail, FIG. 4 is a diagram showing a second embodiment, and FIG. 5 is a diagram showing a state in which acceleration acts on the second embodiment. 12 ... Oil reservoir, 16 ... Oil strainer, 18 ...
… Suction port, 20… Lid member.

Claims (2)

[Scope of utility model registration request] Claim: What is claimed is: 1. An oil intake device for an automatic transmission, in which oil in an oil reservoir below an automatic transmission is sucked by an oil pump from an inlet opening into the oil reservoir, a part of which can be closed at the intake. A lid member is provided, and the lid member can be displaced according to the acting acceleration, and when the oil surface inclines from the horizontal plane due to an acceleration of a predetermined value or more, the lid member is the portion on the oil level lowering side of the suction port. An oil suction device for an automatic transmission, characterized in that the oil suction device is configured to be closed. 2. An oil intake device for an automatic transmission, wherein oil in an oil reservoir below an automatic transmission is sucked by an oil pump from an inlet opening into the oil reservoir, and a plurality of suction ports are provided for each suction port. A lid member that can close this is provided at the mouth, and the lid member can be displaced according to the acting acceleration, and when the oil level tilts from the horizontal plane due to the acceleration above a predetermined level, the oil level lowering side An oil suction device for an automatic transmission, characterized in that only a lid member provided at the suction port of the is configured to be displaced to a closed position.