JP3643244B2 - Substructure of automatic transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lower structure of an automatic transmission that protects a solenoid and the like against impact input from below a vehicle.
[0002]
[Prior art]
Conventionally, an oil suction device for an automatic transmission as described in Japanese Utility Model Publication No. 6-38210 shown in FIG. 6 or FIG. 7 is known. In such a configuration, a control valve assembly 2 as a valve assembly is disposed on the lower surface side of the automatic transmission main body 1.
[0003]
The control valve assembly 2 is mainly configured by combining an upper body 3, an inter body 4, a lower body 5, and the like.
[0004]
Among these, the lower body 5 a of the lower body 5 is provided with a dish-shaped oil pan 6 that is spaced from the lower surface 5 a by a predetermined distance and covers the control valve assembly 2.
[0005]
An oil strainer 7 is provided on the lower surface side 5 a of the lower body 5, and the oil staying on the bottom surface portion 6 a of the oil pan 6 is sucked and supplied into the control valve assembly 2. Has been.
[0006]
A plurality of protrusions 8a... Are provided around the suction port 8 of the oil strainer 7, and a clearance of a predetermined height h1 is provided between the tip portions 8b and 8b and the bottom surface portion 6a. It is configured to form.
[0007]
In the conventional structure configured as above, even if an obstacle or the like collides with the lower surface side of the vehicle and the oil pan 6 is deformed by the collision load, between the front end portions 8b and 8b and the bottom surface portion 6a. Even if the tip 8b and the bottom 6a are in contact with each other, the flow area of the oil to be sucked in can be ensured by the clearance of the predetermined height h1 formed between the two.
[0008]
[Problems to be solved by the invention]
However, in the lower structure of the automatic transmission, if a solenoid projecting downward from the lower surface portion 5a of the lower body 5 of the control valve assembly 2 is provided, the bottom surface portion 6a may come into contact with the solenoid. . In particular, since the primary duty solenoid is disposed along the sliding direction in the vertical direction with respect to the lower body 5, it is difficult to reduce the amount of protrusion from the lower surface portion.
[0009]
An object of the present invention is to provide a lower structure of an automatic transmission that can reduce the possibility of contact with a solenoid even when the shape of an oil pan is deformed due to a collision on the lower surface side of the vehicle in view of the above situation. To do.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention described in claim 1, a valve assembly composed of a control valve for control and a multilayer body for housing the control valve is disposed on the lower surface side of the automatic transmission main body, In the lower structure of the automatic transmission in which the oil pan covering the lower body lower surface side of the valve assembly has a predetermined interval from the lower body lower surface and a part of the solenoid projects from the lower surface of the lower body, The lower structure of the automatic transmission is characterized in that a rib that protrudes in the oil pan direction from the top of the solenoid adjacent to the solenoid is provided integrally with the lower body.
[0011]
According to the first aspect of the present invention configured as described above, since the rib projects in the oil pan direction adjacent to the solenoid, the deformation of the oil pan stops in contact with the rib.
[0012]
For this reason, for example, even if the shape of the oil pan is deformed due to a collision on the lower surface side of the vehicle, the possibility that the solenoid valve contacts can be reduced.
[0013]
According to a second aspect of the present invention, a pair of the ribs are formed on both sides of the solenoid, and the lower structure of the automatic transmission according to the first aspect is characterized.
[0014]
In this configuration, the pair of ribs formed on both sides of the solenoid abuts on both sides an oil pan that is to be deformed upward due to a collision on the vehicle lower surface side, and stops. . For this reason, the possibility that the solenoid valve contacts the oil pan can be further reduced.
[0015]
According to a third aspect of the present invention, the lower structure of the automatic transmission according to the first or second aspect, wherein the rib is integrally extended from the lower body raised portion formed corresponding to the valve storage position. It is characterized by.
[0016]
According to the third aspect of the present invention, the rib is integrally extended from the lower body raised portion formed corresponding to the valve storage position, so that the valve portion is reinforced by the rib. In addition, it is not necessary to increase the protruding amount of the rib by the height of the raised portion and to set it large.
[0017]
According to a fourth aspect of the present invention, the valve is an accumulator valve embedded along the lower surface of the lower body. The substructure of the automatic transmission according to the third aspect is characterized.
[0018]
According to the fourth aspect of the present invention configured as described above, since the valve is an accumulator valve embedded along the lower surface of the lower body, the height is further increased by the protruding portion that protrudes greatly. Thus, it is not necessary to set a large projecting amount of the rib.
[0019]
According to a fifth aspect of the present invention, the solenoid is any one of the first to fourth aspects, wherein the slider is a primary duty solenoid in a direction in which the slider slides substantially perpendicularly to the lower surface of the lower body. The substructure of the automatic transmission described in the item is characterized.
[0020]
In the configuration according to claim 5, the solenoid is deformed by the rib even if the solenoid is a primary duty solenoid in a direction in which the slider slides substantially orthogonally to the lower surface of the lower body. Protected from the oil pan. Accordingly, the degree of freedom in design increases.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a specific first embodiment of the present invention will be described with reference to the drawings.
[0022]
1 to 5 show a first embodiment of the present invention. In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as a prior art example.
[0023]
First, the configuration will be described. In the first embodiment, as shown in FIG. 2, a control valve assembly 12 as a valve assembly is disposed on the lower surface side 11a of the automatic transmission main body 11 of the vehicle.
[0024]
As shown in FIG. 3 or FIG. 4, the control valve assembly 12 mainly includes a combination of an upper body 3, an inter body 4, a lower body 13 and the like, and houses each control valve to be described later and these control valves. The multi-layer body is configured to be fastened together by a plurality of bolt members 14.
[0025]
Among these, the lower body 13 of the lower body 13 is provided with a dish-like oil pan 6 that is spaced from the lower surface 13 a by a predetermined distance and covers the control valve assembly 12.
[0026]
Further, an oil strainer 7 is provided on the lower surface portion 13 a of the lower body 13, and the oil staying on the bottom surface portion 6 a of the oil pan 6 is sucked and supplied into the control valve assembly 12. Has been.
[0027]
Around the suction port 8 of the oil strainer 7, a protruding portion 8c is provided in a circumferential shape, and a clearance having a predetermined height h2 is formed between the tip portion 8b and the bottom surface portion 6a. It is comprised so that.
[0028]
The lower surface portion 13a is provided with a primary duty solenoid 15 as the solenoid. The primary duty solenoid 15 is fixed by bolt members 16 and 16 in such a direction that the slider (spool or needle or the like) slides in a substantially vertical direction substantially perpendicular to the lower body lower surface portion 13a. Yes.
[0029]
Further, accumulator valves 17, 17 as a pair of control valves for control are embedded horizontally on both sides of the primary duty solenoid 15 in the vehicle width direction along the longitudinal direction in the vehicle front-rear direction. The raised portions 17a and 17a forming the valve body lower surface side of the accumulator valves 17 and 17 each have a substantially semicircular cross section and project from the lower surface portion 13a.
[0030]
A pair of ribs 18 and 18 located on both sides of the solenoid are integrally formed on the raised portions 17a and 17a. The rib 18 includes a rib main body 19 extending along the vehicle front-rear direction, and a width-direction reinforcing rib portion 20 extending integrally with the rib main body 19 so as to be orthogonal to both sides in the vehicle width direction. Mainly composed of 20.
[0031]
Further, in the first embodiment, the tip 19a of the rib main body 19 is connected to the bottom surface portion 6a so as to be closer to the oil pan 8 than the lower end 15a of the primary duty solenoid 15 as shown in FIG. The gap distance h3 provided between them is set to be smaller than the gap distance h4 between the lower end 15a and the bottom surface 6a.
[0032]
Next, the operation of the first embodiment will be described.
[0033]
In the first embodiment, since the pair of ribs 18 and 18 project in the direction of the oil pan 6 adjacent to the primary duty solenoid 15, for example, up to the position indicated by the solid line in FIG. Even if an obstacle is brought into contact with and deforms, the deformation of the oil pan 6 stops by contacting the tips 19a and 19a of the rib bodies 19 and 19 of the ribs 18 and 18.
[0034]
For this reason, the possibility that the primary duty solenoid 15 contacts the bottom surface portion 6a of the deformed oil pan 6 can be reduced.
[0035]
And since the said ribs 18 and 18 are each extended integrally from the protruding parts 17a and 17a which the embedded accumulator valve | bulbs 17 and 17 form, the valve | bulb part which protruded and formed from the lower surface part 13a is this width | variety. While being reinforced by the direction reinforcing ribs 20 and 20, it is not necessary to make the protruding amount of the ribs 18 high by the height of the raised portions 17a. For this reason, it is possible to suppress the increase in thickness by improving the rigidity of the raised portion 17a, reduce the raw material cost of the lower body 13, and prevent the formation of voids at the time of casting, thereby improving the workability. Can be a thing.
[0036]
In the first embodiment, since the valve is an accumulator valve 17 or 17 embedded along the lower body lower surface portion 13a, the valve has a larger diameter than other valves and the bottom surface portion. The raised portion 17a projecting greatly in the 6a direction can increase the height. Therefore, it is not necessary to set the protruding amount of the rib 18 to be large, the hot water flow of the rib main body 19 is good, and the workability is improved.
[0037]
Even if the solenoid is the primary duty solenoid 15 having a direction of sliding substantially orthogonal to the lower body lower surface portion 13a, the ribs 18 and 18 protect the deformed oil pan 6 from deformation. Therefore, the degree of freedom of design increases, for example, the lower body 13 itself is set in a thin plate shape.
[0038]
Further, in the first embodiment, as shown in FIG. 1 or FIG. 4, the distance h3 of the gap provided between the bottom surface portion 6a is made larger than the distance h4 of the gap between the lower end 15a and the bottom surface portion 6a. Also, the tip 19a of the rib body 19 is closer to the oil pan 8 than the lower end 15a of the primary duty solenoid 15 is set. Therefore, the tips 19a and 19a of the rib bodies 19 and 19 are brought into contact with the bottom surface portion 6a of the deforming oil pan 6 before the primary duty solenoid tip 15a and stopped. For this reason, the primary duty solenoid 15 can be protected more reliably without being brought into contact with the oil pan bottom surface portion 6a.
[0039]
The first embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the first embodiment, and even if there is a design change or the like without departing from the gist of the present invention. Included in the invention.
[0040]
For example, in the first embodiment, the ribs 18 and 18 are described as being formed as a pair on both sides of the primary duty solenoid 15, but at least one of them is adjacent to the solenoid. It is sufficient if it is formed.
[0041]
Further, in the first embodiment, the solenoid has been described by taking the primary duty solenoid 15 as an example, but other duty solenoids and the like may be provided so as to partially protrude from the lower surface portion 13a of the lower body 13. Any type of solenoid may be used, and the arrangement direction, quantity, shape, and size are not particularly limited.
[0042]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the rib projects in the oil pan direction adjacent to the solenoid, the deformation of the oil pan is brought into contact with the rib. Stop.
[0043]
For this reason, for example, even if the shape of the oil pan is deformed due to a collision on the lower surface side of the vehicle, the possibility that the solenoid valve contacts can be reduced.
[0044]
According to a second aspect of the present invention, a pair of ribs formed on both sides of the solenoid abuts on both sides an oil pan that is to be deformed upward due to a collision on the vehicle lower surface side and stops. For this reason, the possibility that the solenoid valve contacts the oil pan can be further reduced.
[0045]
According to the third aspect of the present invention, since the rib is integrally extended from the lower body raised portion formed corresponding to the valve storage position, the valve portion is reinforced by the rib. At the same time, it is not necessary to increase the protruding amount of the rib by the height of the raised portion and to set it large.
[0046]
According to the fourth aspect of the present invention, since the valve is an accumulator valve embedded along the lower surface of the lower body, the height is further increased by the protruding portion that is protruded greatly. There is no need to set a large rib protruding amount.
[0047]
According to a fifth aspect of the present invention, the solenoid is deformed by the rib even when the solenoid is a primary duty solenoid in a direction in which the slider slides substantially orthogonally to the lower surface of the lower body. Protected from oil pan. Accordingly, since the rib is provided in the oil pan direction adjacent to the solenoid that increases the degree of freedom in design, the deformation of the oil pan stops in contact with the rib.
[0048]
For this reason, for example, even if the shape of the oil pan is deformed due to a collision on the lower surface side of the vehicle, there is a practically beneficial effect that the possibility that the solenoid valve contacts the oil pan can be reduced.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view corresponding to a position viewed from a side surface of a vehicle, illustrating a configuration of a main part, in a lower structure of an automatic transmission according to a first embodiment of the present invention.
FIG. 2 is a schematic view of the lower structure of the automatic transmission according to the first embodiment, as viewed from the side of the vehicle, explaining the overall configuration.
FIG. 3 is a cross-sectional view corresponding to a position of the control valve assembly as viewed from the front of the vehicle in the lower structure of the automatic transmission according to the first embodiment.
FIG. 4 is a cross-sectional view corresponding to a position seen from the side surface of the vehicle, illustrating the configuration of the lower structure of the automatic transmission according to the first embodiment.
FIG. 5 is a plan view of the lower body of the control valve assembly as viewed from below in the lower structure of the automatic transmission according to the first embodiment.
FIG. 6 is a perspective view of an oil strainer as viewed obliquely from below in the lower structure of the conventional automatic transmission.
FIG. 7 is a schematic view of a lower structure of an automatic transmission according to a conventional example, as viewed from the side of the vehicle, illustrating the overall configuration.
[Explanation of symbols]
6 Oil pan 6a Bottom portion 11 Automatic transmission body 11a Lower side 12 Control valve assembly (valve assembly)
13 Lower body 13a Lower surface part 15 Primary duty solenoid (solenoid)
15a Lower end 17, 17 Accumulator valve (valve)
17a, 17a protuberance 18, 18 rib 19a, 19a tip

Claims (5)

A valve assembly composed of a control valve for control and a multilayer body for housing the control valve is disposed on the lower surface side of the automatic transmission body, and an oil pan covering the lower body lower surface side of the valve assembly is provided from the lower surface of the lower body. In the lower structure of the automatic transmission having a gap and partly projecting a solenoid on the lower surface of the lower body,
A lower structure of an automatic transmission, wherein a rib that protrudes in the oil pan direction from the top of the solenoid adjacent to the solenoid is provided integrally with the lower body on the lower surface of the lower body. The lower structure of an automatic transmission according to claim 1, wherein a pair of the ribs are formed on both sides of the solenoid. The lower structure of an automatic transmission according to claim 1 or 2, wherein the rib is integrally extended from the lower body raised portion formed corresponding to the valve storage position. 4. The lower structure of an automatic transmission according to claim 3, wherein the valve is an accumulator valve housed in the lower surface of the lower body. 5. The automatic transmission according to claim 1, wherein the solenoid is a primary duty solenoid in a direction in which the slider slides substantially orthogonally to the lower surface of the lower body. Substructure.

Images