JP3026294B1 - Automatic transmission control unit case - Google Patents

Abstract

A novel case of an automatic transmission control unit capable of efficiently performing electrical connection, in which a case body and a lid can be securely sealed without impairing rebearability. Suggest. SOLUTION: In a case of a control unit of an automatic transmission, which comprises a case main body 2 in which a control unit of the automatic transmission is disposed inside and a sealing lid 3 which fits the case main body 2 and separates the inside and outside of the case. A thin plate 6 for sandwiching a flexible substrate 4 of the control unit between the case body 2 and the sealing lid 3 from both sides via an adhesive layer 5;
An O-ring 7 for sealing is provided between the sealing lid 3 and the sealing lid 3, and the case body 2 and the sealing lid 3 are connected via connecting bolts 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case for a control unit of an automatic transmission, and further improves the sealability between the case body and a sealing lid fitted to the case while ensuring repairability of the case. It is to try to.

[0002]

2. Description of the Related Art In order to short-circuit a harness between a control unit and an automatic transmission, the control unit is placed separately from the automatic transmission in a vehicle interior or the like. An automatic transmission with a structure in which a control unit for speed change control is installed in the casing of the control valve is considered,
In this case, since the control unit is placed in the hydraulic oil together with the case in which the control unit is housed, it is necessary to seal the case so that the hydraulic oil does not enter, and furthermore, the case has a heat resistance. Must also be excellent.

In such a case, an O-ring is arranged between a case body housing the control unit and a lid that fits and seals the case body, and their mating surfaces are integrally joined by vibration welding or the like. A structure as shown in FIG. 4 is considered. In addition, in order to efficiently connect the control unit electrically, a flexible substrate is adopted for the control unit, and the substrate is connected to the case body and the lid. As shown in FIG. 5 in which an adhesive layer is formed between them so as to prevent the intrusion of hydraulic oil, or an O-ring is arranged in place of the adhesive layer. The following can be considered.

[0004]

In the case having a structure as shown in FIG. 4, the electrical connection of the control unit is made by using metal terminals penetrating the case body. The lid and the lid perform vibration welding, so they have the best sealing properties.However, this type of case requires the case to be destroyed when the control unit inside the case is removed once. However, there is a disadvantage that repair cannot be performed.

On the other hand, in the case of the type shown in FIG. 5, since the case body and the lid are connected by bolts, the case can be disassembled by removing the bolts. However, since the case is placed in a harsh environment, the expansion and contraction of the gas inside the case due to temperature changes will inevitably cause the adhesive layer to deteriorate, preventing the entry of hydraulic oil for a long period of time. There was an inability to do so. FIG.
In the method shown in the above, there is an advantage that the adhesive layer is not deteriorated and the sealing property is not impaired, but there is unevenness due to the formation of the wiring pattern on the substrate, so the seal by O-ring Since it could not follow, there was a slight problem in the sealing performance.

SUMMARY OF THE INVENTION It is an object of the present invention to securely seal a case body and a lid without impairing repairability in a case of an automatic transmission control unit capable of efficiently performing electrical connection. Some are proposing new cases.

[0007]

According to a first aspect of the present invention, there is provided a case of an automatic transmission control unit, comprising: a case main body in which a control unit of the automatic transmission is arranged inside; A thin plate that sandwiches the flexible board of the control unit between the case body and the hermetic lid from both sides via an adhesive layer, and a thin plate, the case body, and the hermetic lid. And an O-ring that seals each other, and is characterized in that the case body and the sealing lid are connected via bolts.

The case of the automatic transmission control unit according to claim 2 of the present invention is characterized in that the thin plate is made of metal, and furthermore, the automatic transmission control unit according to claim 3 of the present invention. The case of the machine control unit is characterized in that the thin plate is made of aluminum.

[0009]

In the case of the automatic transmission control unit according to the first aspect of the present invention, the flexible substrate of the control unit is sandwiched from both sides by a thin plate with an adhesive layer interposed therebetween, and this is connected to the case body. It is arranged between the sealing lid, and furthermore, an O-ring is arranged between the thin plate and the case body and the sealing lid, and the case body and the sealing lid are connected by bolts. It is possible to completely seal the inside, the sealing lid can be easily removed from the case body by releasing the bolts, and it is possible to simultaneously improve the sealing performance and ensure the repairability of the case it can.

In the case of the automatic transmission control unit according to claim 2 of the present invention, since the thin plate is made of metal, the rigidity is relatively high even if the case is disassembled a plurality of times, so that it can be reused. Yes, and reliable sealing is possible by contact with the O-ring.

Since the case of the control unit is placed in a severe environment, when the thin plate is made of, for example, carbon steel, the thin plate may be rusted or corroded by prolonged contact with oxygen in the air. However, in the present invention, since the thin plate is made of aluminum as defined in claim 3, the above-mentioned generation of rust and corrosion can be advantageously avoided.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below more specifically with reference to the drawings. FIG. 1 shows a cross section of a case of an automatic transmission control unit according to the present invention,
In the figure, reference numeral 1 denotes a control unit, 2 denotes a case main body in which the control unit 1 is arranged inside, 3 denotes a hermetic lid that fits with the case main body 2 and separates the inside and outside of the case, 4 denotes a flexible substrate of the control unit 1,
Reference numeral 5 denotes an adhesive layer disposed on both side surfaces of the flexible substrate 4, and reference numeral 6 denotes a thin plate. The thin plate 6 sandwiches the flexible substrate 4 from both sides with the adhesive layer 5 interposed therebetween.

Reference numeral 7 denotes an O-ring for sealing between the thin plate 6, the case body 2 and the sealing lid 3, respectively.
Reference numeral 8 denotes a connecting bolt, which tightly connects the sealing lid 3 to the case body 2 together with the above-mentioned sealing member.

FIG. 2 is an exploded perspective view of the case shown in FIG. In an automatic transmission having a structure as shown in FIG. 3 in which a control unit for shifting control is installed near the casing of the control valve, the casing in which the control unit is mounted withstands high temperatures because the casing is in a severe condition. Needless to say, a high sealing property is required so that hydraulic oil does not easily enter the case, and the case can be attached again even if the sealing lid is once removed from the case body. It is required to be capable of having excellent so-called repairability.

In the case of the control unit according to the present invention, the adhesive layer 5 is provided on the upper and lower sides of the flexible substrate 4 of the control unit so as to correspond to the unevenness of the wiring pattern on the surface of the substrate 4 and complete sealing between them. And a thin plate 6 made of aluminum or the like sandwiching the adhesive layer 5, and an O-ring 7 between the thin plate 6, the case body 2, and the sealing lid 3. Complete sealing can be achieved without any intrusion of hydraulic oil or the like from outside the case.

Since the case body 2 and the sealing lid 3 are connected by bolts 8, the control unit can be taken out of the case as required by loosening the bolts, and the repairability of the case is ensured. .

The case body 2 and the sealing lid 3 in the present invention
A resin molded into a desired shape using a resin (for example, PPS) can be used.

[Brief description of the drawings]

FIG. 1 is a diagram showing a cross section of a case of an automatic transmission control unit according to the present invention.

FIG. 2 is an exploded perspective view of the case shown in FIG.

FIG. 3 is a diagram schematically showing the entire appearance of the automatic transmission.

FIG. 4 is a diagram showing a configuration of a control unit having a conventional structure.

FIG. 5 is a diagram showing a configuration of a control unit having a conventional structure.

FIG. 6 is a diagram showing a configuration of a control unit having a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control unit 2 Case main body 3 Sealing lid 4 Flexible board 5 Adhesive layer 6 Thin plate 7 O-ring 8 Connecting bolt

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-324285 (JP, A) JP-A-1-312252 (JP, A) JP-A-2-3744 (JP, A) JP-A-50- 42524 (JP, A) JP-A-11-63219 (JP, A) JP-A-4-116183 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16H 59/00-61 / 12 F16H 61/16-61/24 F16H 63/40-63/48

Claims (3)

(57) [Claims] 1. A case of a control unit of an automatic transmission, comprising: a case main body in which a control unit of the automatic transmission is disposed inside; and a hermetically sealed lid that fits into the case main body and separates the inside and outside of the case. Is a thin plate that sandwiches the flexible board of the control unit between the case body and the sealing lid from both sides via a layer of adhesive, and a seal ring that seals between the thin plate and the case body and the sealing lid. A case of an automatic transmission control unit, comprising: a case body and a sealing lid connected via bolts. 2. The automatic transmission control unit case according to claim 1, wherein the thin plate is made of metal. 3. The automatic transmission control unit case according to claim 1, wherein the thin plate is made of aluminum.