JP6770391B2 - Vehicle cover - Google Patents

Description

The present invention relates to a vehicle cover that covers the inside of a vehicle member when fixed to the vehicle member.

Conventionally, a cover covering a vehicle member (for example, a cylinder head) in which oil is scattered inside is provided with a gasket groove over the periphery for interposing a gasket in order to prevent oil from leaking to the outside. (For example, Patent Document 1).

In such a cover, in order to prevent the displacement of the gasket, a protrusion to be inserted into the positioning hole formed in the vehicle member is formed, and the protrusion is inserted into the positioning hole into the vehicle member. By fixing it, the position of the gasket is prevented from shifting.

Japanese Patent No. 4677283

By the way, when removing the cover fixed to the vehicle member housed in the engine room (bonnet) of the vehicle, various parts are housed in the bonnet and a sufficient work space cannot be secured, so the cover is left as it is. It may be difficult to remove it perpendicular to the vehicle member.

In such a case, the cover is tilted with respect to the vehicle member to be removed, but at this time, the protrusion may come into contact with the positioning hole and be damaged.

Therefore, an object of the present invention is to provide a vehicle cover capable of preventing damage to the protrusions.

In order to solve the above problems, the vehicle cover of the present invention is integrally formed with a main body portion having a contact surface that comes into contact with the vehicle member when fixed to the vehicle member, and the main body portion. It includes a pair of cylindrical protrusions that project perpendicularly to the contact surface and are inserted into the pair of positioning holes formed in the vehicle member, and the pair of protrusions project with respect to the contact surface. When viewed from orthogonal directions, they are arranged on a plane including the contact surface with a predetermined axis passing through the center of the main body portion sandwiched between them, and each of the pair of protrusions has a tip portion. A tapered portion formed in the shape of the plate and reduced in diameter as it is separated from the contact surface, and a relief portion formed by cutting out only the predetermined shaft side from the tapered portion to the proximal end side including the tapered portion. The relief portion has the above, and in a state where the pair of protrusions is inserted into the pair of positioning holes, only one of the pair of protrusions is pulled out from one of the positioning holes. When the other of the pair of protrusions is tilted with respect to the other of the positioning holes, the predetermined axial side of the other protrusions does not come into contact with the other positioning holes .

Further, a flange portion that is integrally molded with the main body portion and extends to the outer peripheral side along the peripheral edge of the main body portion is provided, the pair of protrusions are arranged on the flange portion, and the relief portion is provided. In a state where the pair of protrusions are inserted into the pair of positioning holes, only one of the pair of protrusions is pulled out from one of the positioning holes, so that the main body is made of the other protrusion. It is preferable that the shape is such that the predetermined shaft side of the other protrusion does not come into contact with the other positioning hole when the flange portion in the vicinity is used as a fulcrum and is rotated around an axis parallel to the predetermined axis .
Further, the vehicle cover is provided with a through hole that penetrates the flange portion in a direction perpendicular to the contact surface, and has a configuration of being fixed to the vehicle member by a bolt inserted through the through hole. In the relief portion, after the bolt is removed and the main body portion floats from the vehicle member in a direction perpendicular to the contact surface, only one of the pair of protrusions is pulled out from one of the positioning holes. As a result, when the other of the pair of protrusions is tilted with respect to the other of the positioning holes, the predetermined shaft side of the other protrusions does not come into contact with the other positioning holes. Good.
Further, the vehicle cover has a configuration in which the gasket is sandwiched between the flange portion and the vehicle member so as to crush the gasket, and is fixed to the vehicle member. When the bolt is removed , the vehicle cover is fixed to the vehicle member. It is preferable that the shape of the gasket is restored so that the main body portion floats from the vehicle member in a direction perpendicular to the contact surface .
Further, the relief portion has a shape in which, when viewed from a direction parallel to the predetermined axis, the outer shape of the protrusion on the predetermined shaft side moves away from the predetermined axis as it separates from the contact surface. I hope there is.
Further, the relief portion may be a hemispherical shape cut out from the predetermined shaft side of the protrusion portion .

Further, it is preferable that a gasket groove into which the gasket is inserted is formed on the contact surface over the peripheral edge.

Further, it is preferable that the main body portion and the protrusion portion are integrally formed of resin.

Further, it is preferable that the engine room is provided and the vehicle member is removed from the bonnet side.

According to the present invention, it is possible to prevent the protrusions from being damaged.

It is a figure which shows the structure of the power transmission device of a vehicle. It is a figure explaining the structure of the containment chamber. It is a figure which shows the structure of a valve cover. It is a partially enlarged view of the valve cover including a protrusion. It is a figure which shows the state that a valve cover is removed. It is a figure explaining the structure of the protrusion in another embodiment.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, other specific numerical values, and the like shown in the embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. To do.

FIG. 1 is a diagram showing a configuration of a vehicle power transmission device 1. As shown in FIG. 1, the vehicle (automobile) includes a power transmission device 1, and the power transmission device 1 transmits the power of the engine 2 as a drive source.

The engine 2 is, for example, a reciprocating engine, and the piston is reciprocated by the explosive pressure in the combustion chamber to rotate the crankshaft. A torque converter 3 is connected to the crankshaft of the engine 2.

The torque converter 3 is housed in a converter case (vehicle member) 4, and includes a front cover 3a connected to a crankshaft and a pump impeller 3b fixed to the front cover 3a. Further, in the torque converter 3, the turbine runner 3c is arranged to face the pump impeller 3b in the front cover 3a, and the turbine shaft 3d is connected to the turbine runner 3c.

Further, in the torque converter 3, the stator 3e is arranged on the inner peripheral side between the pump impeller 3b and the turbine runner 3c, and the working fluid is sealed inside.

The pump impeller 3b and the turbine runner 3c are provided with a large number of blades. When the pump impeller 3b rotates, the working fluid is sent to the outer peripheral side, and when the working fluid is sent to the turbine runner 3c, the turbine runner 3c is rotated. Let me. As a result, power is transmitted from the crankshaft of the engine 2 to the turbine runner 3c.

The stator 3e changes the flow direction of the working fluid sent out from the turbine runner 3c and returns it to the pump impeller 3b to promote the rotation of the pump impeller 3b. Therefore, the torque converter 3 can amplify the transmission torque.

Further, in the torque converter 3, a clutch plate 3f fixed to the turbine shaft 3d is arranged to face the inner surface of the front cover 3a. The clutch plate 3f is hydraulically pressed against the front cover 3a, so that power is transmitted from the crankshaft to the turbine shaft 3d. Further, by controlling the hydraulic pressure, the clutch plate 3f slides into contact with the front cover 3a, so that the power transmitted from the crankshaft to the turbine shaft 3d can be adjusted.

The transmission 5 includes, for example, a primary pulley 6, a secondary pulley 7, and a belt 8, and is housed in a main case (vehicle member) 9. The primary pulley 6 is provided on the turbine shaft 3d, and the secondary pulley 7 is provided on the rotating shaft 10 arranged parallel to the turbine shaft 3d. The belt 8 is composed of a chain belt in which a link plate is connected by a pin, is hung between the primary pulley 6 and the secondary pulley 7, and transmits power between the primary pulley 6 and the secondary pulley 7. Here, the case where the belt 8 is composed of a chain belt has been described, but the belt 8 may be composed of, for example, a metal belt formed by sandwiching a plurality of pieces (elements) between two rings.

The primary pulley 6 is configured to include a fixed sheave 6a and a movable sheave 6b. The fixed sheave 6a and the movable sheave 6b are provided so as to face each other in the axial direction of the turbine shaft 3d. Further, the facing surfaces of both the fixed sheave 6a and the movable sheave 6b are cone surfaces 6c having a substantially conical shape, and the cone surfaces 6c form a groove through which the belt 8 is hung.

Similarly, the secondary pulley 7 is configured to include a fixed sheave 7a and a movable sheave 7b. The fixed sheave 7a and the movable sheave 7b are provided so as to face each other in the axial direction of the rotating shaft 10. Further, the facing surfaces of both the fixed sheave 7a and the movable sheave 7b are cone surfaces 7c having a substantially conical shape, and the cone surfaces 7c form a groove through which the belt 8 is hung.

The movable sheave 6b of the primary pulley 6 is configured to have a variable axial position of the turbine shaft 3d by the hydraulic pressure of oil supplied from a hydraulic pump (not shown) via the control valve 11. Further, the movable sheave 7b of the secondary pulley 7 is configured to have a variable axial position of the rotating shaft 10 by the hydraulic pressure of the oil supplied from the hydraulic pump via the control valve 11.

As described above, the primary pulley 6 has a variable facing distance between the fixed sheave 6a and the movable sheave 6b, and the secondary pulley 7 has a variable facing distance between the fixed sheave 7a and the movable sheave 7b. The groove through which the belt 8 is hung is narrow in the radial direction of the fixed sheave 6a and the movable sheave 6b, and the fixed sheave 7a and the movable sheave 7b, and wide in the radial direction. Therefore, when the facing distance between the cone surfaces 6c and 7c changes and the groove width over which the belt 8 is hung is changed, the position where the belt 8 is hung changes.

Taking the primary pulley 6 as an example, when the facing distance between the cone surfaces 6c becomes wide and the width of the groove over which the belt 8 is hung becomes wide, the position where the belt 8 is stretched on the cone surface 6c becomes the inner diameter side. , The winding diameter of the belt 8 becomes smaller. On the other hand, when the facing distance between the cone surfaces 6c is narrowed and the width of the groove over which the belt 8 is hung is narrowed, the position where the belt 8 is stretched on the cone surface 6c is on the outer diameter side, and the winding diameter becomes large. .. In this way, the transmission 5 continuously changes the transmission power between the turbine shaft 3d and the rotating shaft 10.

A front wheel 17 is connected to the rear stage of the rotary shaft 10 via a gear mechanism 13, a front drive pinion 14, a front differential 15, and a front drive shaft 16 housed in a transfer case 12. Then, the transmission power shifted by the transmission 5 is transmitted to the front wheels 17 via the gear mechanism 13, the front drive pinion 14, the front differential 15, and the front drive shaft 16.

Further, a rear wheel 22 is connected to the rear stage of the rotary shaft 10 via a gear mechanism 18, a propeller shaft 19, a rear differential 20, and a rear drive shaft 21 housed in the transfer case 12. Then, the transmission power shifted by the transmission 5 is transmitted to the rear wheels 22 via the gear mechanism 18, the propeller shaft 19, the rear differential 20, and the rear drive shaft 21.

The control valve 11 is housed in a storage chamber 23 formed vertically above the converter case 4 and the main case 9, as will be described in detail later. The control valve 11 is controlled by a TCU (not shown), and appropriately controls the hydraulic pressure supplied to the torque converter 3 and the transmission 5. The accommodation chamber 23 is covered with a valve cover (vehicle cover) 100 from above in a state where the control valve 11 is accommodated.

FIG. 2 is a diagram illustrating the configuration of the accommodation chamber 23. As shown in FIG. 2, in the converter case 4, the accommodating portion 4a is formed so that the upper end portion on the main case 9 side is recessed inward. Further, the main case 9 is the upper end portion on the converter case 4 side, and the accommodating portion 9a is formed so as to be recessed inward at a position facing the accommodating portion 4a.

Then, the space surrounded by the accommodating portion 4a of the converter case 4 and the accommodating portion 9a of the main case 9 becomes the accommodating chamber 23. The storage chamber 23 is filled with oil, and the control valve 11 is housed so as to be submerged in the oil. The main case 9 is formed with a communication hole 9b that connects the storage chamber 23 and the inside of the main case 9 so that the oil stored in the storage chamber 23 can flow into the main case 9.

Further, vertically above the accommodation chamber 23 is covered with a valve cover 100 so that the oil stored in the accommodation chamber 23 does not leak to the outside. The valve cover 100 is fixed to the upper surface 4b of the converter case 4 and the upper surface 9c of the main case 9 by bolts (not shown). The converter case 4 and the main case 9 are connected to each other so that the upper surfaces 4b and 9c are flush with each other.

Further, the valve cover 100 is formed with a gasket groove 108c (see FIG. 3), and a rubber gasket 110 is provided in the gasket groove 108c. When the valve cover 100 is fixed to the converter case 4 and the main case 9, the rubber gasket 110 is sandwiched between the upper surfaces 4b and 9c and the valve cover 100 so as to be crushed, and is stored in the accommodation chamber 23. Prevents oil from leaking to the outside.

FIG. 3 is a diagram showing the configuration of the valve cover 100. As shown in FIG. 3, the valve cover 100 is made of a resin material, and the main body 102, the protrusions 104, and 106 are integrally formed. As shown in the cross section in FIG. 2, the main body portion 102 is formed in a bowl shape bulging vertically upward as a whole, and a flange portion 108 is formed on the peripheral edge thereof.

The flange portion 108 is formed so as to extend to the outer peripheral side along the peripheral edge of the main body portion 102, and has a flush contact surface 108a that abuts on the upper surface 4b of the converter case 4 and the upper surface 9c of the main case 9. Have. Further, the flange portion 108 is formed with a plurality of through holes 108b penetrating in the vertical direction, and a metal collar 112 having a cylindrical shape is inserted through the plurality of through holes 108b.

In addition, screw grooves are formed on the upper surface 4b of the converter case 4 and the upper surface 9c of the main case 9 at positions facing the through holes 108b, respectively. When the valve cover 100 is fixed to the converter case 4 and the main case 9, the valve cover 100 is fixed by screwing the bolt inserted into the collar 112 into the screw groove.

Further, the flange portion 108 is formed with a gasket groove 108c in which a rubber gasket 110 is interposed inside the through hole 108b on the contact surface 108a in the circumferential direction.

The protrusions 104 and 106 are located on the outer peripheral side of the gasket groove 108c on the contact surface 108a of the flange portion 108, and are projected from the main body 102 (flange portion 108) perpendicularly to the contact surface 108a. It is integrally formed. Further, the protrusions 104 and 106 are provided so as to be located on opposite sides with respect to a reference axis passing through the center of the main body 102 in the lateral direction. As will be described in detail later, positioning holes 114 are formed on the upper surface 4b of the converter case 4 and the upper surface 9c of the main case 9 at positions facing the protrusions 104 and 106. When the valve cover 100 is fixed to the converter case 4 and the main case 9, the protrusions 104 and 106 are inserted into the positioning holes 114 to prevent the valve cover 100 from being displaced with respect to the converter case 4 and the main case 9.

By the way, when it becomes necessary to remove the valve cover 100, such as when removing the control valve 11 for inspection and maintenance, various vehicle members are housed in the engine room and a sufficient work space cannot be secured. It is difficult to remove the cover 100 perpendicularly to the converter case 4 and the main case 9. In order to remove the valve cover 100 vertically, it is necessary to remove the fixing between the vehicle body and the power transmission device 1 and move the position of the power transmission device 1 with respect to the vehicle body, which increases the working time.

Therefore, the operator first lifts the valve cover 100 slightly with respect to the converter case 4 and the main case 9, and pulls out one of the protrusions 104 and 106 from the positioning hole 114. Then, by tilting the valve cover 100 and pulling out the other of the protrusions 104 and 106 from the positioning hole 114, the valve cover 100 can be removed.

However, since the protrusions 104 and 106 are made of a resin material integrally formed with the main body 102, they are easily damaged with a smaller force than a metal material or the like. Therefore, the protrusions 104 and 106 of the present embodiment have a shape described below, so that the protrusions 104 and 106 are prevented from being damaged when the valve cover 100 is removed.

FIG. 4A is a partially enlarged view of the valve cover 100 including the protrusion 104, and FIG. 4B is a partially enlarged view of the valve cover 100 including the protrusion 106. As shown in FIG. 4A, the protrusion 104 is formed in a substantially cylindrical shape, and the reference axis side passing through the center in the lateral direction of the main body 102 is cut out so as to be separated from the contact surface 108a. The relief portion 104a is formed so as to be substantially hemispherical with a rounded shape.

Similarly, as shown in FIG. 4B, the protrusion 106 is formed in a substantially cylindrical shape, and the reference shaft side passing through the center in the lateral direction of the main body 102 is cut out from the contact surface 108a. The relief portion 106a is formed so as to become a substantially hemispherical shape that is rounded as the distance increases.

That is, the protrusions 104a and 106 are formed with relief portions 104a and 106a so as to have a line-symmetrical shape with respect to the reference axis passing through the center of the main body 102 in the lateral direction.

FIG. 5 is a diagram showing how the valve cover 100 is removed. When the valve cover 100 is removed from the converter case 4 and the main case 9, the valve cover 100 is slightly floated with respect to the upper surface 4b and the upper surface 9c as shown in FIG. 5A.

Then, for example, after the protrusion 106 is pulled out from the positioning hole 114, the valve cover 100 is tilted with the flange portion 108 along the longitudinal direction on the protrusion 104 side as a fulcrum, as shown in FIG. 5 (b). , The protrusion 104 is tilted in the positioning hole 114. At this time, since the relief portion 104a is formed in the protrusion 104, the valve cover 100 can be tilted without the protrusion 104 coming into contact with the positioning hole 114.

For example, when the valve cover 100 is tilted after the protrusion 104 is first pulled out from the positioning hole 114, the protrusion 106 is also tilted in the positioning hole 114. At this time, since the relief portion 106a is formed in the protrusion 106, the valve cover 100 can be tilted without the protrusion 106 coming into contact with the positioning hole 114.

As described above, in the valve cover 100, the protrusions 104 and 106 inserted into the positioning holes 114 are integrally formed with the main body 102, and the protrusions 104 and 106 are formed when the valve cover 100 is tilted. Relief portions 104a and 106a notched so as not to come into contact with the positioning hole 114 are formed.

This makes it possible to prevent the protrusions 104 and 106 from coming into contact with the positioning holes 114 and being damaged when the valve cover 100 is removed from the converter case 4 and the main case 9.

In particular, when the valve cover 100 is provided in the engine room and the valve cover 100 is removed from the bonnet side, it is difficult to remove the valve cover 100 and the protrusions 104 and 106 are likely to be damaged. Useful from.

Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, and it is understood that these also naturally belong to the technical scope of the present invention. Will be done.

For example, in the above embodiment, the protrusions 104 and 106 are formed in a substantially cylindrical shape, and the relief portion is formed so that the reference axis side passing through the center of the main body 102 in the lateral direction is a substantially hemispherical shape. 104a and 106a were formed. However, the shape of the relief portion is not limited to this, as long as the shape can prevent the protrusion from coming into contact with the positioning hole 114 and being damaged when the valve cover 100 is tilted and removed. It may have other shapes.

FIG. 6 is a diagram illustrating the configuration of the protrusions 200 and 300 in another embodiment. For example, as shown in FIG. 6A, the protrusion 200 has a shape in which the reference axis side passing through the center in the lateral direction of the main body 102 is cut out so that the cross section has a D shape with respect to the cylindrical shape. It may be. Further, as shown in FIG. 6B, the protrusion 300 may have a shape cut out so that the cross section has a T shape.

Further, in the above embodiment, the valve cover 100 is provided to prevent oil from leaking to the outside from the storage chamber 23 accommodating the control valve 11, but the present invention is not limited to this, and oil and water in the vehicle are not limited to this. It can be applied to the cover of a container in which a liquid such as is scattered inside.

The present invention can be used as a cover that covers the inside of a vehicle member when it is fixed to the vehicle member.

4 Converter case (vehicle member)
9 Main case (vehicle parts)
100 valve cover (vehicle cover)
102 Main body 108a Contact surface 104, 106 Projection 104a, 106a Relief

Claims (9)

A main body having a contact surface that comes into contact with the vehicle member when fixed to the vehicle member,
A pair of cylindrical protrusions that are integrally formed with the main body , project perpendicular to the contact surface , and are inserted into a pair of positioning holes formed in the vehicle member.
With
The pair of protrusions are arranged with a predetermined axis passing through the center of the main body on a plane including the contact surface when viewed from a direction orthogonal to the contact surface. Orthogonal
Each of the pair of protrusions includes a tapered portion formed at the tip portion and shrinking in diameter as it is separated from the contact surface, and only the predetermined shaft side including the tapered portion on the proximal end side of the tapered portion. Has a relief formed by notching up to
The relief portion is formed by pulling out only one of the pair of protrusions from one of the positioning holes in a state where the pair of protrusions is inserted into the pair of positioning holes. A vehicle cover characterized in that when the other of the portions is tilted with respect to the other of the positioning holes, the predetermined shaft side of the other protrusion does not come into contact with the other positioning holes. .. A flange portion that is integrally molded with the main body portion and extends to the outer peripheral side along the peripheral edge of the main body portion is provided.
The pair of protrusions are arranged on the flange portion, and the pair of protrusions is arranged on the flange portion.
In the relief portion, in a state where the pair of protrusions is inserted into the pair of positioning holes, only one of the pair of protrusions is pulled out from one of the positioning holes, whereby the main body portion is formed. When the flange portion in the vicinity of the other protrusion is rotated around an axis parallel to the predetermined axis, the predetermined shaft side of the other protrusion does not come into contact with the other positioning hole. The vehicle cover according to claim 1, wherein the cover is provided. The vehicle cover has a through hole that penetrates the flange portion in a direction perpendicular to the contact surface, and is fixed to the vehicle member by a bolt inserted through the through hole.
In the relief portion, after the bolt is removed and the main body portion floats from the vehicle member in a direction perpendicular to the contact surface, only one of the pair of protrusions is pulled out from one of the positioning holes. As a result, when the other of the pair of protrusions is tilted with respect to the other of the positioning holes, the predetermined shaft side of the other protrusion does not come into contact with the other positioning hole. The vehicle cover according to claim 2. The vehicle cover has a configuration in which the gasket is sandwiched between the flange portion and the vehicle member so as to crush the gasket and is fixed to the vehicle member.
The third aspect of the present invention is characterized in that when the bolt is removed, the shape of the gasket is restored so that the main body portion floats from the vehicle member in a direction perpendicular to the contact surface. The vehicle cover described. When viewed from a direction parallel to the predetermined axis, the relief portion has a shape in which the outer shape of the protrusion on the predetermined axis side moves away from the predetermined axis as the distance from the contact surface increases. The vehicle cover according to any one of claims 1 to 4. The vehicle cover according to claim 5 , wherein the relief portion is a hemispherical shape cut out from the predetermined shaft side of the protrusion portion . The vehicle cover according to any one of claims 1 to 6, wherein a gasket groove into which a gasket is inserted is formed over the peripheral edge of the contact surface. The vehicle cover according to any one of claims 1 to 7, wherein the main body portion and the protrusion portion are integrally formed of a resin. The vehicle cover according to any one of claims 1 to 8, which is provided in the engine room and is removed from the vehicle member from the bonnet side.

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