JP2000110921A - Cooling structure of continuously variable transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent sucking of water in a supply duct by arranging an intake port of cooling air of the supply duct in an opening shape between the upper end of a radiator and the lower end of an upper member, and arranging the intake port in an opening shape in the rear of the respective front ends and in front of the respective rear ends of the radiator and the upper member. SOLUTION: A supply duct 24 is extendedly arranged in a radiator 14. An intake port 34 of the radiator 14 side first duct part 26 is arranged in an opening shape so as to be positioned between the upper end 62 of the radiator 14 and the lower end of an upper member 6. The intake port 34 is also arranged in an opening shape so as to be positioned in the rear of the front end 66 of the radiator 14 and the front end 68 of the upper member 6 and in front of the rear end 70 of the radiator 14 and the rear end 72 of the upper member 6. With this constitution, since the intake port 34 is opened in a comparatively high position of a vehicle, splashed water is hardly splashed on the intake port 34. Even if water is splashed, the water hardly enters the intake port 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure for a continuously variable transmission, and more particularly to a cooling structure for a continuously variable transmission, which can make it difficult for water to enter an inlet of a supply duct for supplying cooling air to the continuously variable transmission. Can prevent the intrusion of water into the air, make it difficult to suck in the air warmed by the radiator from the intake, avoid the decrease in cooling efficiency, improve the assemblability of the supply duct, The present invention relates to a cooling structure for a continuously variable transmission that can prevent transmission of noise and can reduce noise.

[0002]

2. Description of the Related Art Some vehicles and the like are provided with an engine mounted in an engine room and a continuously variable transmission connected to the engine. The continuously variable transmission is
A continuously variable transmission mechanism is provided which is enclosed by the transmission case. The continuously variable transmission mechanism is provided by winding a belt around a drive-side pulley and a driven-side pulley capable of increasing and decreasing the groove width, and relatively increasing and decreasing each groove width of the drive-side pulley and the driven-side pulley. By increasing or decreasing the turning radius of
The driving force of the engine is taken out by changing the speed ratio steplessly.

FIGS. 14 and 15 show a cooling structure for cooling a continuously variable transmission mechanism of such a continuously variable transmission. 14 and 15, reference numeral 102 denotes a vehicle;
Denotes an engine room, 106 denotes an engine, and 108 denotes a continuously variable transmission. The continuously variable transmission 108 is a transmission case 1
One end of the supply duct 114 is connected to the cover 112 of the ten, and an inlet 116 for cooling air is provided at the other end of the supply duct 114.

[0004] The cooling structure of the continuously variable transmission 108 comprises a supply duct 11 for supplying cooling space to a transmission case 110.
The intake air 116 heated by the radiator 118 is sucked by arranging the intake 116 of the radiator 118 below one side of the radiator 118 and opening it inside the bumper 120 disposed in front of the radiator 118. It is difficult.

As a cooling structure for such a continuously variable transmission, Japanese Patent Application Laid-Open No. Hei 8-226531, and Japanese Patent Application Laid-Open No. 9-329
No. 218, Japanese Unexamined Patent Publication No. 7-248054, and Japanese Utility Model Laid-Open No. 5-6252.

Japanese Unexamined Patent Publication No. Hei 8-226531 discloses a cover for a continuously variable transmission in which an introduction duct for introducing outside air and an outside air are connected to a discharge / exhaust duct, and an exhaust duct is provided from the front to the rear of the vehicle. It is arranged in the flow direction of the traveling wind toward the vehicle to obtain a negative pressure suction effect by the traveling wind.

[0007] Japanese Unexamined Patent Publication No. 9-329218 discloses a continuously variable transmission cover in which an intake duct for introducing outside air and an outside air are connected to a discharge duct, and a sound absorbing material is provided in an exhaust duct. In addition, a mesh is provided at least on the outlet side of the exhaust duct to prevent the sound absorbing material from jumping out and to prevent stones and the like from entering.

Japanese Unexamined Patent Application Publication No. 7-248054 discloses an introduction duct for introducing and discharging outside air to and from a belt chamber that covers the periphery of a V-belt mounted on an input / output pulley of a continuously variable transmission. A discharge duct is provided, and a foam of a soft synthetic resin having a sound absorbing property is foamed in the passages of the introduction duct and the discharge duct.

[0009] Japanese Unexamined Utility Model Publication No. 5-6252 discloses an oil chamber casing having two or more rotating shafts arranged in parallel and forming an oil chamber and an air chamber casing forming an air chamber. In a power transmission device provided with bearings for supporting the rotary shaft at corresponding positions in each casing, the air chamber casing is made of a material having a larger linear expansion coefficient than the oil chamber casing. It is formed.

[0010]

FIG.
In the cooling structure of the continuously variable transmission 108 shown in FIG. 15, the intake 116 of the supply duct 114 is connected to the radiator 11
8 is located below one side and is open, so that water that has been splashed up due to a puddle running of the vehicle, etc.
May enter the inlet 116 from the lower gap, and water may be sucked into the supply duct 114.

For this reason, the cooling structure of the continuously variable transmission 108 shown in FIGS. 14 and 15 has a disadvantage that water may enter the transmission case 110 and cause functional deterioration.

Further, the continuously variable transmission 1 shown in FIGS.
In the cooling structure 08, since the supply duct 114 is formed integrally, it is difficult to connect to the cover 112 provided on the side of the continuously variable transmission 104, and there is a problem that the assembling property is deteriorated. .

[0013]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned disadvantages, the present invention provides an engine mounted in an engine room of a vehicle and a continuously variable transmission connected to the engine. In a cooling structure for a continuously variable transmission having a supply duct for supplying cooling air in a transmission case enclosing a continuously variable transmission mechanism of the continuously variable transmission, the supply duct is disposed in front of the continuously variable transmission. The cooling air intake of the supply duct is provided so as to be open between the upper end of the radiator and the lower end of the upper member disposed above the radiator. The radiator and the upper member are each provided with an opening at a position rearward of each front end of the radiator and the upper member and forward of each rear end of the radiator and the upper member.

The supply duct is divided into a first duct portion on the radiator side and a second duct portion on the continuously variable transmission side, and a second duct previously connected to the continuously variable transmission side is provided. Wherein a first connection portion of the first duct portion is connected to a second connection portion of the portion at a position where the first connection portion does not interfere with the radiator and the continuously variable transmission.
The first connecting portion of the first duct portion is formed in a bellows shape by using a flexible material, and the supply duct is expanded by removing a lower side of an inlet of the first duct portion. A part is formed and provided.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the cooling structure of a continuously variable transmission according to the present invention, an opening is provided by positioning an inlet of a supply duct between an upper end of a radiator and a lower end of an upper member disposed above the radiator. With this arrangement, the intake is opened at a relatively high position in the vehicle. Since the inlet is located behind the front end of each of the radiator and the upper member and is provided with an opening, it is difficult to enter the inlet even if water is applied. By providing the opening at a position forward of the rear end, it is possible to make it difficult to inhale the air warmed by the radiator.

Further, in the cooling structure of the continuously variable transmission according to the present invention, the supply duct is divided into a first duct portion on the radiator side and a second duct portion on the continuously variable transmission side, and the supply duct is provided on the continuously variable transmission side. The connection work can be easily performed by connecting the first connection part of the first duct part to the second connection part of the second duct part connected in advance at a position that does not interfere with the radiator and the continuously variable transmission. And the assemblability can be improved.

Further, in the cooling structure of the continuously variable transmission according to the present invention, the first connecting portion of the first duct portion of the supply duct is formed in a bellows shape by using a flexible material, and thus the first duct portion of the first duct portion is provided. The connection work between the first connection portion and the second connection portion of the second duct portion can be easily performed, the assemblability can be improved, the transmission of vibration can be prevented, and the noise can be reduced. it can.

In the cooling structure for a continuously variable transmission according to the present invention, the lower portion of the inlet of the first duct portion of the supply duct is removed to form an enlarged portion, so that the opening of the inlet is opened. The area can be enlarged to increase the amount of cooling air taken in, and the cooling performance can be improved.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 11 show an embodiment of the present invention. 1 and 2, 2 is a vehicle, 4 is an engine room, 6 is an upper member, 8 is a bumper, 10 is an engine, 12 is a continuously variable transmission, and 14 is a radiator.

In the engine room 4 of the vehicle 2, an engine 10 is mounted so as to be directed in the width direction of the vehicle 2, and a continuously variable transmission 12 is connected to the engine 10.
The radiator 14 is disposed in the engine room 4 so as to be located in front of the continuously variable transmission 14 and below the upper member 6 so as to be directed in the width direction. A bumper 8 is provided in front of the radiator 14.

The continuously variable transmission 12 is provided with a continuously variable transmission mechanism (not shown) covered by a transmission case 16. As shown in FIG. 2, the transmission case 16 connects one side in the width direction of the vehicle 2 to the engine 10, and the cover 1
8 is provided.

In the continuously variable transmission mechanism, a belt is wound around a driving pulley and a driven pulley capable of increasing and decreasing a groove width, and the respective groove widths of the driving pulley and the driven pulley are relatively increased or decreased to thereby adjust the belt width. The drive force of the engine 10 is extracted by changing the speed ratio in a stepless manner by increasing or decreasing the rotation radius.

In the cooling structure of the continuously variable transmission 12, a cover portion 18 attached to the transmission case 16 is provided with a cover side connection portion 20, and the cover side connection portion 20 is provided with an inlet 22. The transmission-side case 1 is connected to the cover-side connection portion 20.
A supply duct 24 for supplying cooling air to the inside 6 is connected. The supply duct 24 is provided to extend to the radiator 14 provided on the front side of the continuously variable transmission 12.

As shown in FIGS. 3 to 11, the supply duct 24 is divided into two parts, a first duct part 26 on the radiator 14 side and a second duct part 28 on the continuously variable transmission 12 side. I have.

As shown in FIGS. 3 to 5, the first duct portion 26 is provided with an intake portion 30 at one end and a first connection portion 32 at the other end. As shown in FIGS. 6 to 8, the intake section 30 is provided with an intake 34 for cooling air that is opened to the outside air, and is provided with a duct-side mounting boss 36. Intake 34
Is formed and provided so as to gradually expand toward the distal end in a planar shape. The intake unit 30 includes an intake 34
The lower side is removed to form an enlarged portion 38. The first connection part 32 is formed in a bellows shape by using a flexible material, and is provided with a first connection port 40. First duct section 26
Is provided with a first supply passage 42 extending from the inlet 34 to the first connection port 40.

FIGS. 9 to 11 show the second duct portion 28.
As shown in FIG. 2, a second connection portion 44 connected to the first connection portion 32 is provided at one end, and the cover-side connection portion 2 is provided at the other end.
There is provided a duct-side connecting portion 46 that is connected to the duct 0. Second
The connection portion 44 is provided with a second connection port 48 communicating with the first connection port 40, and a duct-side mounting bracket 50 is provided. The duct-side connecting portion 46 is provided with an outlet 52 communicating with the inlet 22. The second duct portion 28 includes a second
A second supply passage 54 extending from the connection port 48 to the outlet 52 is provided.

The cooling structure of the continuously variable transmission 12 is shown in FIG.
As shown in FIG. 2, a member-side bracket 56 is mounted on an upper member 6 disposed above the radiator 14 by means of member-side mounting bolts 58. 36 are attached by first attachment bolts 60.

The first duct section 24 attached to the upper member 6 has the intake port 34 having the upper end 62 of the radiator 14 and the upper member 6 disposed above the radiator 14.
Between the front end 66 of the radiator 14 and the front end 68 of the upper member 6 and forward of the rear end 70 of the radiator 14 and the rear end 72 of the upper member. The opening is provided.

The cooling structure of the continuously variable transmission 12 is as follows.
As shown in FIGS. 1 and 2, the duct-side connection portion 46 of the second duct portion 28 is connected to the cover-side connection portion 20 of the cover portion 18, and the transmission-side bracket 74 is attached to the transmission case 16. The transmission-side bracket 74 is provided with the duct-side mounting bracket 50 of the second duct portion 28 by using the second mounting bolt 78.

The supply duct 24 is connected to the first connection part 32 of the first duct part 26 attached to the upper member 6 by the second connection part 4 of the second duct part 28 attached to the continuously variable transmission 12.
4 through the first supply passage 42, the first connection port 40, the second connection port 48, the second supply passage 60, and the outlet 52 from the inlet 34 to the inlet 2 of the cover portion 18.
It is communicated to 2.

Next, the operation will be described.

During the operation of the engine 2, the continuously variable transmission 12 takes in outside air from the inlet 34 of the supply duct 24 as cooling air, and uses this cooling air as the first and second supply passages 42.
The liquid is guided to the outlet 52 by 54, supplied from the inlet 22 into the cover 24, and introduced into the transmission case 16.
The introduced cooling air cools the continuously variable transmission of the continuously variable transmission 12 and is discharged from a discharge port (not shown).

The cooling structure of the continuously variable transmission 12 is shown in FIG.
As shown in FIG. 2, the first duct portion 26 of the supply duct 24 is attached to the upper member 6 disposed above the radiator 14 by a member-side bracket 56.

At this time, the supply duct 24 has the intake 34 of the first duct portion 26 positioned between the upper end 62 of the radiator 14 and the lower end 64 of the upper member 6 disposed above the radiator 14. Open and provide,
The front end 66 of the radiator 14 and the front end 6 of the upper member 6
The opening is provided behind the rear end 8 and forward of the rear end 70 of the radiator 14 and the rear end 72 of the upper member.

As described above, the cooling structure of the continuously variable transmission 12 is configured such that the intake 34 of the supply duct 24 is provided between the upper end 62 of the radiator 14 and the lower end 64 of the upper member 6 disposed above the radiator 14. Since the intake port 34 is opened at a relatively high position of the vehicle by being provided so as to be positioned and opened, it is difficult for water that has been splashed up due to puddle traveling of the vehicle 2 to be taken into the inlet 34. In addition, since the intake port 34 is located behind the front ends 66 and 68 of the radiator 14 and the upper member 6 and is provided with an opening, it is difficult for the intake port 34 to enter the intake port 34 even if it is splashed with water. can do.

For this reason, the cooling structure of the continuously variable transmission 12 can make it difficult for water to enter the intake 34 of the supply duct 24 and make it difficult to enter the intake 34 even if it is splashed with water. By doing so, it is possible to prevent water from being sucked into the supply duct 24, prevent water from entering the transmission case 16, and prevent functional deterioration of the continuously variable transmission 12.

The cooling structure of the continuously variable transmission 12 has a structure in which the intake 34 is connected to the radiator 14 and the rear ends 7 of the upper member 6.
By providing an opening that is located forward of 0.72, it is possible to make it difficult to draw in the air warmed by the radiator 14, so that a reduction in cooling efficiency can be avoided.

The supply duct 24 is divided into two first ducts.
The second connecting portion 44 provided on the second duct portion 28 of the second duct portions 26 and 28 is connected to the cover-side connecting portion 20 provided on the cover portion 18 of the continuously variable transmission 12 in advance, so that the second
The connecting portion 44 can be disposed at a position where it does not interfere with the radiator 14 and the continuously variable transmission 12.

As a result, the first connection portion 32 of the first duct portion 26 is connected to the radiator 14 and the continuously variable transmission 12 at the second connection portion 44 of the second duct portion 28 connected to the continuously variable transmission 12. Since the connection can be performed at a position where no interference occurs, the connection operation can be easily performed, and the assembling property can be improved.

Further, the cooling structure of the continuously variable transmission 12 includes the first connecting portion 3 of the first duct portion 26 of the supply duct 24.
Since the second duct 2 is formed in a bellows shape by using a flexible material, the work of connecting the second duct portion 28 to the second connection portion 44 can be easily performed, and the assembling property can be improved. Transmission of vibration of the transmission 12 can be prevented, and noise can be reduced.

The cooling structure of the continuously variable transmission 12 is as follows.
By removing the lower side of the inlet 34 of the first duct portion 26 and forming and providing the expanded portion 38, the opening area of the inlet 34 can be enlarged to increase the amount of cooling air intake. And cooling performance can be improved.

FIG. 12 shows another embodiment of the present invention. The cooling structure of this alternative embodiment includes a supply duct 2
The first and second blocking plates 80 and 82 for preventing the intrusion of water are provided in the intake section 4 of the fourth embodiment, and a drain hole 84 for the intruded water is provided. The first blocking plate 80 is provided so as to protrude downward from the upper plate portion 86 in the intake portion 36. Second blocking plate 8
2 is provided behind the first blocking plate 80 so as to protrude upward from the lower plate 88 of the intake unit 30. The drain hole 84 is provided in the lower plate portion 88 immediately upstream of the second blocking plate 84.

When water enters through the inlet 34 of the supply duct 24, the water is blocked by the first blocking plate 80 and falls on the lower plate portion 88, and is blocked by the second blocking plate 82. Then, it is dropped on the lower plate portion 88. Lower plate 8
The water that has fallen on 8 is discharged from the drain hole 84.

As described above, the first and second blocking plates 80 and 82 are provided in the intake section 30, and the drain hole 84 is provided in the lower plate portion 88 immediately upstream of the second blocking plate 82. Thus, even if water is sucked in from the inlet 34, the inflow can be blocked by the first and second blocking plates 80 and 82, and the drain hole 8
4 can be drained immediately.

For this reason, the cooling concept of the continuously variable transmission 12 can surely prevent water from entering the transmission case 16 and favorably reduce the function of the continuously variable transmission 12 due to the entry of water. Can be prevented.

FIG. 13 shows still another embodiment of the present invention. The cooling structure of this still another embodiment includes:
A guide plate 90 is provided in front of the upper end 62 of the radiator 14 to collect cooling air and guide it to the inlet 34 of the supply duct 24.

As described above, by providing the guide plate 90 in front of the upper end 62 of the radiator 14, the radiator 14
The unheated cooling air ahead is collected and taken into the inlet 34.
And the amount of cooling air introduced can be increased, and the cooling efficiency of the continuously variable transmission 12 can be further improved.

[0048]

As described above, the cooling structure of the continuously variable transmission according to the present invention can make it difficult for the intake of the supply duct for supplying the cooling air to the continuously variable transmission to be sprayed with water. Can be made hard to enter even if it is exposed to water.

For this reason, the cooling structure of this continuously variable transmission is as follows.
Water can be prevented from being sucked into the supply duct, water can be prevented from entering the transmission case, and functional deterioration of the continuously variable transmission can be prevented.

Further, the cooling structure of the continuously variable transmission according to the present invention can make it difficult to draw in the air heated by the radiator, thereby avoiding a decrease in cooling efficiency.

[Brief description of the drawings]

FIG. 1 is a side view of a cooling structure of a continuously variable transmission showing an embodiment of the present invention.

FIG. 2 is a plan view of a cooling structure of the continuously variable transmission.

FIG. 3 is a plan view of a first duct unit.

FIG. 4 is a side view of a first duct unit.

FIG. 5 is a front view of a first duct unit.

FIG. 6 is a plan view of an intake section of the first duct section.

FIG. 7 is a side view of an intake section of the first duct section.

FIG. 8 is a front view of an intake section of the first duct section.

FIG. 9 is a plan view of a second duct unit.

FIG. 10 is a side view of a second duct unit.

FIG. 11 is a front view of a second duct unit.

FIG. 12 is a cross-sectional view of an intake section of a first duct section showing another embodiment.

FIG. 13 shows a radiator and a first radiator showing still another embodiment.
It is sectional drawing of a duct part.

FIG. 14 is a plan view of a cooling structure of a continuously variable transmission showing a conventional example.

FIG. 15 is a side view of a cooling structure of a continuously variable transmission showing a conventional example.

[Explanation of symbols]

 Reference Signs List 2 vehicle 4 engine room 6 upper member 8 bumper 10 engine 12 continuously variable transmission 14 radiator 16 transmission case 18 cover section 20 cover side connection section 24 supply duct 26 first duct section 28 second duct section 30 intake section 32 first connection Portion 34 Inlet 38 Expanding portion 44 Second connection portion 46 Duct side connection portion

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Seiji Ibe 2-12 Kawanami-cho, Atsuta-ku, Nagoya-shi, Aichi F-term (reference) in Aichi Machine Industry Co., Ltd. 3J063 AA01 AB22 AC03 BA01 BA03 BA09 BA10 BA15 CA01 XA11 XB06 XH04 XH42

Claims (4)

[Claims] An engine is mounted and provided in an engine room of a vehicle, and a continuously variable transmission is connected to the engine and provided in a transmission case enclosing a continuously variable transmission mechanism of the continuously variable transmission. In the cooling structure of a continuously variable transmission provided with a supply duct for supplying air, the supply duct is provided so as to extend to a radiator provided on the front side of the continuously variable transmission, and the cooling air for the supply duct is cooled. An inlet is provided and opened between the upper end of the radiator and the lower end of an upper member disposed above the radiator. A cooling structure for a continuously variable transmission, wherein the cooling structure is provided so as to be located forward of an end and opened. 2. The supply duct includes a first duct portion on the radiator side and a second duct portion on the continuously variable transmission side.
The second continuously variable transmission side is connected to the second continuously variable transmission side.
2. The continuously variable transmission according to claim 1, wherein a first connection portion of the first duct portion is connected to a second connection portion of the duct portion at a position that does not interfere with the radiator and the continuously variable transmission. 3. Machine cooling structure. 3. The cooling of the continuously variable transmission according to claim 2, wherein the supply duct is provided by forming a first connecting portion of the first duct portion into a bellows shape using a flexible material. Construction. 4. The continuously variable transmission according to claim 2, wherein the supply duct is provided by forming an enlarged portion by removing a lower side of an intake of the first duct portion. Cooling structure.