JPS6213869A - Assembling device of oil strainer for automatic transmission - Google Patents

Abstract

PURPOSE:To reduce the number of parts and the weight, in an oil strainer assembling device for an automatic transmission of an F.F vehicle, by forming an oil sump directly in the lower wall of a trans axle case then mounting an oil strainer from the jointing face with the trans axle housing. CONSTITUTION:Automatic transmission 1 is provided with a trans axle case 2 to be jointed at the jointing faces 2a, 3a and the trans axle housing 3. While an oil sump 5 is formed by the lower walls 2f, 3b of the case 2 and the housing 3. An oil path 6 communicating with an oil pump 7 is formed in the partition wall 2c of the case 2 to make a hole 10 for mounting an oil strainer communicated with said oil path 6. Furthermore, an oil drain plug 12 is screwed to the lower wall 2f of the case 2. Ten the delivery tube 11a of oil strainer 11 is fitted to said hole 10 to assemble the oil strainer 11 while pressure supporting the underface of strainer 11 by means of the drain plug 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is directed to automatic transmissions installed in automobiles, particularly F-F
The present invention relates to an automatic transmission (front engine/front drive) or a four-wheel drive automatic transmission based thereon, and specifically relates to the structure of assembling an oil strainer to a transaxle case.

(b) Prior art - In m, a transaxle case for an automatic transmission has a valve body attached to its lower part, and therefore, the assembly of the valve body case requires the oil of the valve body case and the transaxle case. Due to the structure of the oil strainer, a wide opening is provided on the opposite side, and the strainer is assembled to the valve body and the opening is closed with an oil pan. ing.

(c) Problems to be Solved by the Invention For this reason, the above-mentioned conventional automatic transmission requires an oil pan that can be removably attached to the lower part of the transaxle case. Gaskets and assembly require bolts, etc., and mounting the transaxle case also requires surface machining, increasing the number of parts.
This is one of the causes of increased product weight and product cost.

Therefore, the present invention solves the above-mentioned problems by forming an oil reservoir directly on the lower wall of the transaxle case and attaching an oil strainer to the oil reservoir from the joint surface with the transaxle housing. The purpose is to

B) Means for Solving the Problem The present invention has been made in view of the above-mentioned circumstances.
As shown in the figure, an automatic transmission 1 includes a transaxle case 2 and a transaxle housing 3 that are joined to each other at longitudinally extending joint surfaces 2a and 3a, and further below the case 2 and the housing 3. An oil reservoir 5 is formed between the walls 2f and 3b. Further, an oil passage 6 communicating with the oil pump 7 is formed in the partition wall 2C of the transaxle case 2, and an oil strainer mounting hole 10 communicating with the oil passage 6 is formed in the lower wall 2f of the case 2. Screw on the drain plug 12. Then, the oil strainer 1) is assembled by fitting the discharge pipe 1)a of the oil strainer 1) into the mounting hole 10, and pressing and supporting the lower surface of the strainer 1) with the drain plug 12.

(e) Operation Based on the above structure, the oil strainer 1) is inserted into the oil reservoir 5 of the transaxle case 2 from the direction of the open joint surface 2a, that is, from the lateral direction. Then, align the discharge pipe 1)a of the oil strainer 1) with the strainer mounting hole 10, screw in the oil drain plug 12 in this state, and press the lower surface of the strainer with its tip, thereby causing the oil strainer 1 ) from above and below to assemble.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

The automatic transmission 1 includes a transaxle case 2 and a transaxle housing 3.
and the housing 3 each have an opening on the side and a joint surface 2a extending substantially in the vertical direction.

They are joined to each other at 3a. Further, the transaxle case 2 has a mounting surface 2b for a valve body (not shown), which is a substantially horizontal surface, on its upper surface, and further includes an input shaft, an output shaft, and a differential shaft of an automatic transmission inside the mounting surface 2b. partition wall 2c that accommodates each.

It is equipped with 2d and 2e.

Further, as shown in detail in FIG. 1, the lower walls 2f and 3b in the vicinity of the joint surfaces 2a and 3a of the transaxle case 2 and the transaxle housing 3, respectively, cooperate to form an oil reservoir 5. In addition, an oil passage 6 is formed in the input shaft supporting partition wall 2C of the case 2 and extends to the joint surface 2a.

Further, an oil pump 7 is attached to the joint surface 28 of the case 2, and its suction lower a is configured to communicate with the oil passage 6. Further, a screw hole 9 is bored in the lower wall 2f forming the oil reservoir 5 in the case 2.
Further, an oil strainer mounting hole 10 is bored in the support partition wall 2c forming the oil passage 6 and communicating with the oil passage 6 and coaxially with the screw hole 9. An oil strainer 1) is arranged in the oil reservoir 5 so that its discharge pipe part 1)a fits into the hole 10, and an oil drain plug 12 is screwed into the screw hole 9. .

Further, a presser rubber 13 is fixed to the tip of the plug 12, and the upper surface of the rubber 13 is in contact with the lower surface of the oil strainer 1).

Since this embodiment has the above-described configuration, in order to assemble the oil strainer 1), first, the transaxle case 2 and the housing 3 are separated, and then the joint surface 2
Insert the oil strainer 1) into the oil reservoir 5 of the case 2 from the a side, that is, the lateral opening (see the chain line in FIG. 1). Then, with the discharge pipe 1) a of the oil strainer 1) aligned with the strainer mounting hole 10, the oil drain plug 1
2 into the screw hole 9, and push up the lower surface of the strainer with the presser rubber °13 at the tip. As a result, the oil strainer 1) Bass discharge pipe 1) a can be connected to the strainer mounting hole 1
0 in an oil-tight manner, and its lower surface is pressed by the presser rubber 13 at the tip of the oil drain plug 12, so that it is assembled and held in a state where it is held between the upper and lower surfaces. Further, in this state, the transaxle case 2 and the housing 3 are joined so that their joining surfaces 2a and 3a match, thereby forming an oil reservoir 5 and an oil passage 6 connected to the suction lower a of the oil pump 7. It will be communicated to.

Then, due to the rotation of the oil pump 7 based on the drive of the automatic transmission, the oil in the oil reservoir 5 is transferred to the oil strainer 1).
The oil is sucked in through the discharge pipe 1) a and sent to the suction lower a of the pump 7 via the oil passage 6, and further supplied to the torque converter and each lubricating point.

(G) As described in detail, according to the present invention, since the oil reservoir 5 is formed in the lower walls 2f and 3b of the transaxle case 2 and the housing 3, a special oil pan is not required.
Therefore, the installation of the oil pan does not require special gaskets, bolts, etc., and furthermore, the installation does not require surface machining, so it is possible to reduce weight and cost.

Furthermore, since the oil strainer 1) is pushed in from the direction of the vertically extending joint surface 2a with the housing 3, that is, from the lateral direction, the strainer is assembled using a wide opening or space in the opposite direction to direction A (see Figure 1). In addition, the oil strainer 1) is fitted with its discharge pipe 1)a into the strainer mounting hole 10 formed in the partition wall 2c of the case 2, and its lower surface is pressed and supported by the oil drain plug 12. Since the oil strainer 1) is assembled, the oil strainer 1) can be easily and reliably assembled despite the structure without an oil pan, and it is possible to achieve compactness and weight reduction, as well as improved ease of assembly. Furthermore, since the oil strainer 1) is held between the oil drain plugs 12, it will not fall out, and the strainer discharge pipe 1) a will not come off from the mounting hole 10 when replacing the oil with the drain plug 12 removed. However, even in this case, drain plug 1
2, the discharge pipe 1)a is fitted into the mounting hole 10 again, and if the discharge pipe 1)a is misaligned with the mounting hole 10, the drain plug 12 cannot be screwed in. Failure to install the oil strainer 1) can be reliably prevented.

In addition, the oil strainer mounting hole 10 is connected to the drain plug 1.
When arranged coaxially with the screw hole 9 for 2, both holes 10
. Even if the holes 10 are misaligned, they can be easily aligned and refitted.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view taken along the line II in FIG. 2 showing the installation of an oil strainer according to the present invention, and FIG. 2 is a partially cutaway front view showing the transaxle case. 1... Automatic transmission, 2-... Transaxle case 2a... Joint surface, 2c... Bulkhead, 2f...
・・Lower wall, 3・Transaxle housing
, 3b...lower wall, 5...-oil sump, 6...
Oil passage, 7...Oil pump, 9...Screw hole, 10...Oil strainer mounting hole,
1)...Oil strainer 1 1)a...Discharge port, 12...Oil drain plug.

Claims (2)

[Claims] (1) In an automatic transmission in which an oil strainer is disposed in an oil reservoir, the automatic transmission includes a transaxle case and a transaxle housing that are joined to each other at a joint surface extending in the longitudinal direction, and further includes and an oil reservoir is formed in the lower wall of the housing, and an oil passage communicating with the oil pump is formed in the partition wall of the case, and an oil strainer mounting hole communicating with the oil passage is formed, and an oil strainer mounting hole is formed in the partition wall of the case. An oil strainer assembly for an automatic transmission, comprising an oil drain plug screwed onto the lower wall, a discharge pipe of the oil strainer fitted into the mounting hole, and a lower surface of the strainer pressed and supported by the drain plug. attaching device. (2) The oil strainer mounting hole formed in the partition wall of the transaxle case is arranged coaxially with the oil drain plug threaded hole formed in the lower wall of the case. Oil strainer assembly equipment for automatic transmissions.