WO2021020088A1

WO2021020088A1 - Shutter device for vehicle

Info

Publication number: WO2021020088A1
Application number: PCT/JP2020/027229
Authority: WO
Inventors: 明宏前田; 原　拓也; 悠起朗設楽; 健良加納
Original assignee: 株式会社デンソー
Priority date: 2019-07-31
Filing date: 2020-07-13
Publication date: 2021-02-04
Also published as: JP2021024291A

Abstract

This shutter device for a vehicle is provided with a frame and a plurality of blades (32). The frame is formed in a frame shape and is disposed between two heat exchangers. The blades are disposed in a space inside the frame. The frame has a holding frame part disposed so as to horizontally cross respective middle sections of the plurality of blades. In the middle sections of the blades, held parts (322) rotatably held by the holding frame part are formed.

Description

Vehicle shutter device

Cross-reference of related applications

This application is based on Japanese Patent Application No. 2019-140685 filed on July 31, 2019, which claims the benefit of its priority, and the entire contents of the patent application are: Incorporated herein by reference.

This disclosure relates to a vehicle shutter device.

In vehicles, the air introduced into the engine room from the grill opening is used to dissipate heat from the radiator through which the engine cooling water flows and to dissipate heat from the condenser of the vehicle air conditioner. Some such vehicles are provided with a shutter device capable of temporarily blocking the flow of air from the grill opening to the engine compartment. As such a shutter device, for example, there is a shutter device described in Patent Document 1 below.

The shutter device described in Patent Document 1 includes a square frame-shaped frame and a plurality of blades arranged inside the frame. The blades are arranged vertically side by side in the frame. Each blade is formed so as to extend in the horizontal direction, and has shaft portions at both ends in the horizontal direction. The shaft portion of each blade is slidably inserted into an insertion hole formed in the frame. The insertion hole is formed so as to penetrate from the inner wall surface of the frame to the outer wall surface. Each blade is rotatably supported by the frame by a bearing structure consisting of a shaft portion of each blade and an insertion hole of the frame. The space inside the frame is opened and closed by the rotational movement of each blade. In this shutter device, air can pass when the plurality of blades are in the open state, and the flow of air through the frame is blocked when the plurality of blades are in the closed state.

Japanese Unexamined Patent Publication No. 2012-1184

In recent years, there is a situation that the space in the engine room is shrinking due to factors such as an increase in the number of devices installed in the engine room of the vehicle. Therefore, it is required to reduce the mounting space of the shutter device of the vehicle. To satisfy this requirement, the inventors are considering arranging the shutter device in a narrow gap formed between two heat exchangers such as a radiator and a capacitor. When arranging the shutter device in such a place, it is essential to reduce the thickness of the shutter device.

On the other hand, when making the shutter device thinner, it is necessary to reduce the width of the blades, which contradicts the increase in the number of blades mounted. Further, in order to reduce the ventilation resistance acting on the blade when the blade is in the open state, it is necessary to reduce the plate thickness of the blade. As a result, a large number of blades having a thin plate thickness are mounted on the shutter device, so that the rigidity of the blades is reduced. Further, depending on the vehicle, the total length of such a thin blade may be increased, and the rigidity of the blade may be further reduced.

When the rigidity of the blade decreases, self-excited vibration may occur in the blade due to the pressure fluctuation of the air passing between two adjacent blades and the influence of the Karman vortex formed by the air passing through the blade. When the blade self-excited and vibrates, the shaft portion of the blade supported by the frame is worn, and worse, the shaft portion may be damaged.

An object of the present disclosure is to provide a vehicle shutter device capable of suppressing self-excited vibration of a blade.

The vehicle shutter device according to one aspect of the present disclosure includes a frame and a plurality of blades. The frame is formed in a frame shape and is arranged between two heat exchangers, or in the front row or the last row of one or more heat exchangers, and is introduced from the grill opening of the vehicle. Air flows through the space inside the frame. The blade is arranged in the space within the frame of the frame, is rotatably supported by the frame, and opens and closes the space within the frame by the rotational operation. The frame has a holding frame portion that is arranged across the intermediate portion of each of the plurality of blades. A held portion that is rotatably held by the holding frame portion is formed in the intermediate portion of the blade.

According to this configuration, since the intermediate portion of the blade is held by the holding frame portion, the rigidity of the blade can be increased.

FIG. 1 is a diagram schematically showing a schematic configuration of a vehicle. FIG. 2 is a perspective view showing a perspective structure of the shutter device of the first embodiment. FIG. 3 is a side view showing the side structure of the upper blade of the first embodiment. FIG. 4 is a side view showing the side structure of the lower blade of the first embodiment. FIG. 5 is an enlarged view showing an enlarged structure around a connecting portion between the link member and the shaft in the shutter device of the first embodiment. FIG. 6 is a perspective view showing a perspective structure of the frame of the first embodiment. FIG. 7 is a cross-sectional view showing a cross-sectional structure of a connecting portion between the holding frame portion and the held portion of the blade of the first embodiment. FIG. 8 is a cross-sectional view showing a cross-sectional structure of a connecting portion between the holding frame portion and the held portion of the blade of the second embodiment. FIG. 9 is a perspective view showing a perspective structure of a connecting portion between the holding frame portion and the held portion of the blade of the second embodiment. FIG. 10 is a cross-sectional view showing a cross-sectional structure of a connecting portion between the holding frame portion and the held portion of the blade of the modified example of the second embodiment.

Hereinafter, an embodiment of the vehicle shutter device will be described with reference to the drawings. In order to facilitate understanding of the description, the same components are designated by the same reference numerals as much as possible in each drawing, and duplicate description is omitted.
<First Embodiment>
First, a schematic configuration of a vehicle equipped with the shutter device of the first embodiment will be described.

As shown in FIG. 1, a grill opening 2 is provided in front of the body 1 of the vehicle C. The grill opening 2 is provided to introduce the air in front of the vehicle body 1 into the engine room 3. In the engine room 3, in addition to the engine 4 of the vehicle C, a radiator 5 and a condenser 6 are arranged. The radiator 5 dissipates the cooling water by exchanging heat between the cooling water for cooling the engine 4 and the air introduced from the grill opening 2. The condenser 6 is a component of the refrigeration cycle of the air conditioner mounted on the vehicle C, and exchanges heat between the refrigerant circulating in the refrigeration cycle and the air introduced from the grill opening 2. Dissipate heat from the refrigerant. The radiator 5 and the condenser 6 are arranged between the grill opening 2 and the engine 4. In this embodiment, the radiator 5 and the condenser 6 correspond to heat exchangers.

A shutter device 10 capable of temporarily blocking the flow of air from the grill opening 2 to the engine room 3 is arranged between the radiator 5 and the condenser 6. The shutter device 10 enables early warm-up of the engine 4, for example, by temporarily blocking the flow of air from the grill opening 2 to the engine room 3 during a cold start of the engine 4. Further, the shutter device 10 improves the aerodynamic performance of the vehicle C by temporarily blocking the flow of air to the engine room 3 when the vehicle C travels at high speed, for example.

Next, the specific structure of the shutter device 10 will be described.
As shown in FIG. 2, the shutter device 10 includes a frame 20, a plurality of blades 30, and an actuator device 40.

The frame 20 includes a first frame main body 21 formed in a rectangular frame shape, and a second frame main body 22 and a third frame main body 23 arranged in a cross shape within the frame of the first frame main body 21. Have.
The first frame main body 21 has an upper frame piece 210, a lower frame piece 211, a right frame piece 212, and a left frame piece 213. The air introduced from the grill opening 2 shown in FIG. 1 flows through the space inside the frame of the first frame main body 21.

In the following, the longitudinal direction of the upper frame piece 210 and the lower frame piece 211 is also referred to as the X-axis direction, and the longitudinal direction of the right frame piece 212 and the left frame piece 213 is also referred to as the Z-axis direction. Further, the Z1 direction, which is one direction in the Z-axis direction, is referred to as "upward", and the Z2 direction, which is the other direction in the Z-axis direction, is referred to as "downward". Further, a direction orthogonal to both the X-axis direction and the Z-axis direction is also referred to as a Y-axis direction. Since the Y-axis direction also corresponds to the air flow direction, the Y-axis direction is also referred to as "air flow direction Y" below.

The second frame main body 22 is provided to reinforce the first frame main body 21. The third frame main body 23 is provided to hold the blade 30 and reinforce the first frame main body 21. The second frame main body 22 is provided between the upper frame piece 210 and the lower frame piece 211 of the first frame main body 21. The third frame main body 23 is provided between the right frame piece 212 and the left frame piece 213 of the first frame main body 21. The space in the frame of the first frame main body 21 is divided into four regions by the second frame main body 22 and the third frame main body 23.

The plurality of blades 30 are arranged in each of the four regions within the frame of the frame 20. In the four regions within the frame of the frame 20, the plurality of blades 30 are arranged so as to have a longitudinal direction in the Z-axis direction and are arranged side by side in the X-axis direction. In the following, for convenience, among the plurality of blades 30 shown in FIG. 2, the blade 30 arranged between the upper frame piece 210 of the first frame main body 21 and the third frame main body 23 is referred to as the “upper blade 31”. The blade 30 arranged between the lower frame piece 211 and the third frame main body 23 is referred to as a "lower blade 32".

As shown in FIG. 3, shaft portions 310 are formed at both ends of the upper blade 31. Further, a power transmission shaft 311 is further formed at the lower end of the blade 30. As shown in FIG. 4, shaft portions 320 are similarly formed at both ends of the lower blade 32. A power transmission shaft 321 is formed at the upper end of the lower blade 32. The

shaft portions

310 and 310 provided at both ends of the upper blade 31 are rotatably supported by the upper frame piece 210 and the third frame main body portion 23 of the first frame main body portion 21, respectively. The

shaft portions

320 and 320 provided at both ends of the lower blade 32 are rotatably supported by the lower frame piece 211 and the third frame main body 23 of the first frame main body 21. The power transmission shaft 311 provided at the lower end of the upper blade 31 and the power transmission shaft 321 provided at the upper end of the lower blade 32 are arranged on the third frame main body 23.

As shown in FIG. 5, a link member 80 is further assembled to the third frame main body 23. The link member 80 is formed so as to extend in the X-axis direction. The link member 80 is connected to the

power transmission shafts

311 and 321 of the upper blade 31 and the lower blade 32, respectively.

A shaft 70 is arranged on the left frame piece 213 of the first frame main body 21 so as to extend upward from the connecting portion with the third frame main body 23. The upper end of the shaft 70 is connected to the actuator device 40 shown in FIG. In FIG. 2, the link member 80 and the shaft 70 are not shown.

The actuator device 40 is fixed above one end of the upper frame piece 210 with screws or the like. The actuator device 40 rotates the shaft 70 based on the supply of electric power. The link member 80 is displaced relative to the third frame main body 23 in the X-axis direction based on the rotation of the shaft 70, so that the power transmission shafts 311 of the upper blade 31 and the lower blade 32 are respectively displaced from the link member 80. An external force in the X-axis direction is applied to 321. As a result, a rotational force is applied to the upper blade 31 and the lower blade 32, and the upper blade 31 and the lower blade 32 rotate. The space in the frame of the first frame main body 21 is opened and closed by the rotational operation of the upper blade 31 and the lower blade 32.

Specifically, when the plurality of blades 30 are in the open state, a gap is formed between the blades 30, so that air can flow from the grill opening 2 into the engine room 3 through the gap. When the plurality of blades 30 are closed, the gaps between the blades 30 are closed, so that the air flow from the grill opening 2 to the engine room 3 is blocked.

By the way, in the shutter device 10 of the present embodiment, since the plate thicknesses of the upper blade 31 and the lower blade 32 are thinned in order to reduce the thickness of the shutter device 10, the rigidity of the

blades

31 and 32 is lowered. There is. In particular, as shown in FIG. 2, since the overall length of the lower blade 32 is longer than that of the upper blade 31, the rigidity of the lower blade 32 is significantly reduced. Therefore, in the shutter device 10 of the present embodiment, the rigidity of the lower blade 32 is increased by holding the central portion of each lower blade 32 by the holding frame portion 24 provided on the frame 20.

Next, the holding structure of the lower blade 32 by the holding frame portion 24 will be described in detail.
As shown in FIG. 4, a held portion 322 is formed at the central portion in the longitudinal direction of the lower blade 32. The held portion 322 is formed so that the cross-sectional shape orthogonal to the longitudinal direction of the lower blade 32 is circular.

As shown in FIG. 6, the holding frame portion 24 is composed of a rod-shaped member, and is between the right frame piece 212 of the first frame main body 21 and the second frame main body 22, and the first frame main body 21. It is provided between the left frame piece 213 and the second frame main body 22. The holding frame portion 24 is arranged so as to cross the central portion between the lower frame piece 211 of the first frame main body portion 21 and the third frame main body portion 23. As shown in FIG. 7, the holding frame portion 24 is formed with a concave fitting portion 240 into which the held portion 322 of each blade 30 is fitted. The held portion 322 of each blade 30 is rotatably held with respect to the holding frame portion 24 by a structure that is fitted into the fitting portion 240 by utilizing the elasticity of the holding frame portion 24, that is, a so-called snap-fit structure.

According to the shutter device 10 of the vehicle C of the present embodiment described above, the actions and effects shown in the following (1) to (4) can be obtained.
(1) A held portion 322 that is rotatably held by the holding frame portion 24 of the frame 20 is formed in the central portion of the lower blade 32. According to such a configuration, since the central portion of the lower blade 32 is held by the holding frame portion 24, the rigidity of the lower blade 32 can be increased.

(2) The held portion 322 is formed so that the cross-sectional shape orthogonal to the longitudinal direction of the blade 30 is circular. According to such a configuration, the held portion 322 can be rotatably held by the holding frame portion 24.
(3) The holding frame portion 24 is formed with a fitting portion 240 into which the held portion 322 is rotatably fitted. According to such a configuration, since the held portion 322 can be held only by the holding frame portion 24, the held portion 322 can be held with a simple structure.

(4) The held portion 322 is formed in the central portion of the lower blade 32. According to such a configuration, the portion of the lower blade 32 that tends to have the lowest rigidity can be held by the holding frame portion 24, so that the rigidity of the lower blade 32 can be effectively improved.

<Second Embodiment>
Next, a second embodiment of the shutter device 10 of the vehicle C will be described. Hereinafter, the differences from the shutter device 10 of the first embodiment will be mainly described.
As shown in FIG. 8, in the shutter device 10 of the present embodiment, the held portion 322 of the lower blade 32 is held by being sandwiched between the holding frame portion 24 and the stopper member 25.

Specifically, the holding frame portion 24 is formed with a concave insertion groove 241 into which substantially half of the held portion 322 of the lower blade 32 is inserted.
Further, as shown in FIG. 9,

pedestals

323a and 323b are provided at both ends of the held portion 322 of the holding frame portion 24. When the portion of the lower blade 32 that opens and closes the space inside the frame of the frame 20 and is located above the held portion 322 is the first blade main body 324a, the pedestal portion 323a is the first blade main body. The lower end of the 324a and the upper end of the held portion 322 are joined. The pedestal portion 323a has a width larger than that of the held portion 322. When the portion of the lower blade 32 that opens and closes the space in the frame of the frame 20 and is located below the held portion 322 is the second blade main body 324b, the pedestal portion 323b is the second blade main body. The upper end of the 324b and the lower end of the held portion 322 are joined. The pedestal portion 323b has a width larger than that of the held portion 322.

As shown in FIG. 8, the stopper member 25 is made of a plate-shaped member, and is arranged so as to face the holding frame portion 24 on the downstream side in the air flow direction Y. The stopper member 25 is provided between the right frame piece 212 of the first frame body 21 and the second frame body 22, and between the left frame piece 213 of the first frame body 21 and the second frame body 22. It is fixed and provided. The stopper member 25 presses the held portion 322 of the lower blade 32 into the insertion groove 241 of the holding frame portion 24. As a result, the held portion 322 of the lower blade 32 is rotatably held by the insertion groove 241 of the holding frame portion 24 and the stopper member 25.

According to the shutter device 10 of the vehicle C of the present embodiment described above, in addition to the actions and effects shown in the above (1), (2), and (4), the following (5) to (7) are shown. The action and effect can be obtained.
(5) The held portion 322 of the lower blade 32 is rotatably held by being sandwiched between the holding frame portion 24 and the stopper member 25. According to such a configuration, it is possible to more accurately hold the held portion 322 of the lower blade 32.

(6) The holding frame portion 24 is arranged on the upstream side in the air flow direction Y with respect to the held portion 322 of the lower blade 32. The stopper member 25 is arranged on the downstream side in the air flow direction with respect to the held portion 322 of the lower blade 32. According to such a configuration, when the lower blade 32 is in the closed state, the lower blade 32 tries to be deformed toward the downstream side in the air flow direction Y by receiving the air pressure. However, the deformation of the lower blade 32 can be suppressed by the stopper member 25.

(7) The lower blade 32 has

pedestals

323a and 323b. One pedestal portion 323a has a width larger than that of the held portion 322 by joining one end portion of the held portion 322 and the lower end portion of the first blade main body 324a. The other pedestal portion 323b has a width larger than that of the held portion 322 by joining the other end portion of the held portion 322 and the upper end portion of the second blade main body 324b. According to such a configuration, the

pedestal portions

323a and 323b can suppress the intrusion of foreign matter into the fitting portion between the held portion 322 and the fitting portion 240 of the holding frame portion 24, so that the fitting portion can be covered. It becomes easy to avoid a situation in which the held portion 322 is difficult to rotate due to the invading foreign matter.

(Modification example)
Next, a modification of the shutter device 10 of the second embodiment will be described.
As shown in FIG. 10, the insertion groove 241 of the holding frame portion 24 of this modified example is formed so that the entire held portion 322 of the lower blade 32 can be inserted. The held portion 322 of the lower blade 32 is rotatably held by being arranged between the holding frame portion 24 and the stopper member 25. Even with such a configuration, it is possible to more accurately hold the held portion 322 of the lower blade 32.

<Other embodiments>
The above embodiment can also be implemented in the following embodiments.
The held portion 322 is not limited to the central portion of the lower blade 32, and may be provided at any portion as long as it is an intermediate portion between both ends of the lower blade 32.

A plurality of held portions 322 may be formed on the lower blade 32. Further, the number of the holding frame portions 24 may be appropriately changed according to the number of the held portions 322 formed on the lower blade 32.
-It is also possible to apply the same structure as the lower blade 32 to the upper blade 31.

-The shutter device 10 of each embodiment is not limited to the one arranged between the radiator 5 and the capacitor 6, and may be any one arranged between any two heat exchangers. For example, when the intake air cooler for cooling the intake air of the internal combustion engine of the vehicle and the condenser are arranged side by side in the air flow direction Y, a shutter device may be arranged between them. Further, the shutter device 10 may be arranged in the front row or the last row of one or a plurality of heat exchangers.

・ This disclosure is not limited to the above specific examples. Specific examples described above with appropriate design changes by those skilled in the art are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the above-mentioned specific examples, and their arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. The combinations of the elements included in each of the above-mentioned specific examples can be appropriately changed as long as there is no technical contradiction.

Claims

It is formed in a frame shape and is arranged between two heat exchangers (5, 6), or is arranged in the front row or the last row of one or more heat exchangers, and the grill opening of the vehicle (C). The frame (20), in which the air introduced from the part (2) flows through the space inside the frame,
It is provided with a plurality of blades (32) that are arranged in the space within the frame of the frame, are rotatably supported by the frame, and open and close the space within the frame of the frame by a rotational operation.
The frame has a holding frame portion (24) arranged so as to cross an intermediate portion of each of the plurality of blades.
A vehicle shutter device in which a held portion (322) rotatably held by the holding frame portion is formed in an intermediate portion of the blade.
The vehicle shutter device according to claim 1, wherein the held portion is formed so that the cross-sectional shape orthogonal to the longitudinal direction of the blade is circular.
The vehicle shutter device according to claim 1 or 2, wherein a fitting portion (240) into which the held portion is rotatably fitted is formed in the holding frame portion.
Further provided with a stopper member (25) fixed to the frame and arranged so as to face the holding frame portion.
The vehicle shutter device according to claim 1 or 2, wherein the held portion is rotatably held by being sandwiched between the holding frame portion and the stopper member.
Further provided with a stopper member fixed to the frame and arranged so as to face the holding frame portion.
The vehicle shutter device according to claim 1 or 2, wherein the held portion is rotatably held by being arranged between the holding frame portion and the stopper member.
The holding frame portion is arranged on the upstream side in the air flow direction with respect to the held portion.
The vehicle shutter device according to claim 4 or 5, wherein the stopper member is arranged on the downstream side in the air flow direction with respect to the held portion.
The vehicle shutter device according to any one of claims 1 to 6, wherein the held portion is formed in a central portion of the blade.
When the portion of the blade that opens and closes the space within the frame of the frame is the blade body (324a, 324b),
The blade has a pedestal portion (323a, 323b) to which the end portion of the held portion and the end portion of the blade body are joined.
The vehicle shutter device according to any one of claims 1 to 7, wherein the pedestal portion has a width larger than that of the held portion.