JP2008030520A - Arm support structure for vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arm support structure for a vehicular air conditioner which suppresses bending and falling of an arm. <P>SOLUTION: A rib wall 6 having a circular arc surface 6a having a turning axis C1 of the arm 4 as a center is provided so as to stand on a surface of a case 2, and a claw part 4g as a guide element guided along the circular arc surface 6a is provided on the arm 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an arm support structure for a vehicle air conditioner.

  2. Description of the Related Art Conventionally, an air conditioner case and an arm that is rotatably supported by the case, a support point at which the case rotatably supports the arm, and an action in which force is transmitted from the arm to another member. 2. Description of the Related Art An arm support structure for a vehicle air conditioner in which a point is displaced in the direction of the axis of rotation of the arm is known (for example, Patent Document 1).

In the arm support structure disclosed in Patent Document 1, the door is opened and closed by an actuator via a link mechanism including two arms.
Japanese Patent Laying-Open No. 2005-132208 (FIG. 11)

  However, as in Patent Document 1, when the support point and the action point are displaced in the direction of the rotation axis of the arm, the center of the support point (rotation axis) and the action point are separated in the radial direction. In addition, since the support point and the action point are also separated in the direction of the rotation axis, the arm may be bent or fall down three-dimensionally, making it difficult to obtain a desired action. It was.

  Then, an object of this invention is to obtain the arm support structure of the vehicle air conditioner which can suppress the bending and fall of an arm.

  In invention of Claim 1, it has the case (2) of the air conditioner (1), and the arm (4) rotatably supported by the said case (2), and the case (2) is an arm. The vehicle air conditioner in which the support point (A) for rotatably supporting (4) and the operating point (B) of the arm (4) are displaced in the direction of the rotation axis (C1) of the arm (4). An arm support structure, wherein a rib wall (6) having an arcuate surface (6a) centering on a rotation axis (C1) of the arm (4) is erected on the surface (2b) of the case (2). The arm (4) is provided with a guide (4g) guided along the arc surface (6a).

  The invention according to claim 2 is characterized in that a plurality of the guide elements (4g) are arranged in the circumferential direction of the arc surface (6a).

  The invention according to claim 3 is characterized in that the guide element (4g) is erected on the surface (4h) of the arm (4) facing the tip surface (6b) of the rib wall (6). .

  According to invention of Claim 1, it can suppress that an arm remove | deviates from a predetermined | prescribed circular arc track | orbit by guiding a guide to a circular arc surface.

  According to the invention of claim 2, by arranging a plurality of guides in the circumferential direction of the arc surface, the arm can be made to follow the arc track with higher accuracy. Moreover, it can suppress that an arm bends in the direction in alignment with the orthogonal surface of a rotating shaft.

  According to invention of Claim 3, it can suppress that an arm inclines with respect to a rotating shaft direction.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of an air conditioner having an arm support structure according to the present embodiment, FIG. 2 is a perspective view of two arms constituting a link mechanism, and FIG. 3 is a plan view of the arm support structure according to the present embodiment. 4 and 4 are sectional views taken along line IV-IV in FIG.

  In the air conditioner 1 according to the present embodiment, as shown in FIG. 1, the cam plate 3 rotatably attached to the case 2 is controlled so as to be rotatable inside the case 2. It is possible to control the open / closed state of a plurality of doors (doors for controlling the air flow path; not shown), of which one door axis is a link mechanism comprising two arms 4 and 5. It is comprised so that it may rotate.

  In such a configuration, the opening and closing control of a plurality of doors is performed by a single flat cam plate 3, and depending on the set position of the door, the support point and the action point are in the radial direction of the rotation shaft as in the arms 4 and 5. In addition to being separated from each other, the axial direction may be relatively large. In FIG. 1, the vertical direction is the axial direction of the arms 4 and 5 and the cam plate 3 (all parallel).

  The arms 4 and 5 are all supported by the case 2 so as to be rotatable. The cam plate 3 rotates the arm 4 and the arm 4 rotates the arm 5 so that the arm 5 is fixed. The door shaft 7 (FIG. 4) is rotated.

  The arms 4 and 5 are linked via an intermediate connection point formed by the protrusion 4j of the arm 4 and the groove 5a of the arm 5, and the rotation direction of the arm 4 driven by the cam plate 3 and the door The rotation directions (that is, the rotation direction of the arm 5) are opposite to each other.

  The arm 4 has a base portion 4a formed in a substantially columnar shape with the rotation axis C1 as a central axis, and a side view projecting from the base portion 4a in the outer diameter direction of the rotation shaft C1 (perpendicular to the rotation axis C1). A substantially right-angled trapezoidal arm portion 4b in a line of sight from the direction; and a substantially disc-like shape projecting from the end of the arm portion 4b opposite to the base portion 4a in a direction substantially perpendicular to the rotation axis C1. The tip part 4c is provided, and is formed in a substantially step shape in a side view. In plan view (line of sight from the direction along the rotation axis C1; FIG. 3), the arm portion 4b and the tip end portion 4c protrude substantially straight from the base portion 4a in the radial direction of the rotation axis C1.

  A cylindrical tubular portion 4e protrudes from the bottom surface (sliding contact surface with the surface 2a) of the base portion 4a on the side close to the tip portion 4c, and is 90 ° on a concentric circle of the tubular portion 4e. Each of the four claw portions 4f is projected. And as shown in FIG. 4, these four nail | claw parts 4f are inserted by the circular through-hole 2c formed in case 2, and the bottom part of the base | substrate part 4a and the hook-shaped part of the front-end | tip of the said nail | claw part 4f By sandwiching the wall of the case 2, the base portion 4 a is locked in contact with the surface 2 a of the case 2, and the base portion 4 a, that is, the arm 4 rotates around the central axis of the through hole 2 c. The structure supported by case 2 so that rotation is possible as (rotation axis C1) is obtained.

  As shown in FIGS. 2 and 3, the arm portion 4b is formed as three parallel plate-like ribs extending along a plane including the rotation axis C1, and can be reduced in weight while ensuring rigidity and strength. It is illustrated.

  In addition, a columnar protrusion 4d protrudes at a position separated from the rotation axis C1 of the arm portion 4b by a predetermined distance. The projection 4d is inserted into a groove (not shown) of the cam plate 3 and pressed from the side surface of the groove, so that the arm portion 4b rotates about the rotation axis C1.

  A cylindrical protrusion 4j protrudes from the tip portion 4c. As described above, the protrusion 4j is inserted into the slot 5a formed in the arm 5. By pressing the side surface of the groove 5a from the protrusion 4j, the arm 5 is rotated around the rotation axis C2. It is designed to be rotated.

  As for the arm 4 having the above-described configuration, as shown in FIG. 4, the support point A by the case 2 and the action point B for the arm 5 are separated by a distance D along the direction of the rotation axis C1. Become.

  As shown in FIG. 4, the claw portion 5c of the arm 5 is fitted into a circular through hole 2d formed in the wall of the case 2, and the arm 5 is located at the center of the through hole 2d at this portion. A configuration is obtained in which the shaft is supported by the case 2 so as to be rotatable about the rotation center (rotation axis C2).

  Ribbed walls 6 and 6 are erected on the surface 2b of the case 2 facing the arms 4 and 5 so as to slidably support the arms 4 and 5. Among these, the rib wall 6 that supports the arm 4 has an arc surface (side surface) 6a centering on the rotation axis C1.

  Here, in this embodiment, the arm 4 is provided with a claw portion 4g protruding from the surface 4h facing the tip surface 6b of the rib wall 6 and the side surface 4i of the claw portion 4g slides on the arc surface 6a of the rib wall 6. It is configured to touch. In other words, in the present embodiment, the claw portion 4 g corresponds to a guide that is guided along the arc surface 6 a of the rib wall 6.

  As shown in FIG. 3, there are a plurality of claw portions 4g spaced apart in the circumferential direction of the arc surface 6a (in this embodiment, three in the width direction both ends and the central portion in plan view (FIG. 3)). ) Is arranged. Specifically, as shown in FIG. 2, a part of the end of the arm portion 4b formed as three parallel plate-like ribs on the rotating shaft C1 side and the rib wall 6 side is protruded from the surface 4h. The claw portion 4g is formed.

  The side surface of the claw portion 4g is in sliding contact with the circular arc surface 6a, and the surface 4h in the vicinity of the claw portion 4g is opposed to the front end surface 6b of the rib wall 6 with a slight gap, or is in sliding contact. As shown in FIG. 4, the substantially L-shaped hook-like structure formed by the surface 4h and the claw portion 4g is locked to the tip of the rib wall 6. Note that the surface 4 h is in sliding contact with the surface 5 b of the arm 5.

  According to the above-described embodiment, the rib wall 6 having the arc surface (side surface) 6 a centering on the rotation axis C <b> 1 of the arm 4 is erected on the surface 2 b of the case 2. Since the claw portion 4g as a guide guided along 6a is provided, the claw portion 4g is guided by the arc surface 6a, so that the arm 4 can be prevented from coming off from a predetermined arc trajectory.

  Further, in the present embodiment, a plurality (three in the present embodiment) of the claw portions 4g are arranged in the circumferential direction of the arc surface 6a, so that the arm 4 can be made to follow a predetermined arc track with higher accuracy. With this configuration, the arm 4 can be placed along a certain section in the circumferential direction of the arc surface 6a (the length of the width of the arm 4 in plan view), so that the arm 4 is in the circumferential direction, that is, the rotation axis C1. It is possible to suppress bending in a direction along the orthogonal plane with (bending in plan view of FIG. 3).

  In the present embodiment, the front surface 6b of the rib wall 6 is opposed to the surface 4h of the arm 4 with a gap or is in sliding contact with the front surface 6b of the rib wall 6, so that the arm portion 4b that stands upright with respect to the front surface 6b of the rib wall 6 is provided. It is possible to suppress tilting (bending in a side view of FIG. 4).

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, in the above-described embodiment, the substantially L-shaped hook-shaped portion formed on the arm as a guide is configured to be in sliding contact with the tip of the rib wall, but the substantially U-shaped hook-shaped structure (guide) It is good also as a structure which latches and is slid so that a child may cover the front end surface of a rib wall.

The perspective view of the air conditioner which has the arm support structure concerning one Embodiment of this invention. The perspective view of the two arms which comprise a link mechanism in the arm support structure concerning one Embodiment of this invention. The top view of the arm support structure concerning one Embodiment of this invention. IV-IV sectional drawing of FIG.

Explanation of symbols

1 Air Conditioner 2 Case 4 Arm 4g Claw (Guide)
4h surface 6 rib wall 6a arc surface 6b tip surface A support point B action point C1 rotation axis

Claims (3)

The air conditioner (1) has a case (2) and an arm (4) rotatably supported by the case (2), and the case (2) rotatably supports the arm (4). An arm support structure for a vehicle air conditioner in which a support point (A) and an action point (B) of an arm (4) are shifted in the direction of the rotation axis (C1) of the arm (4),
A rib wall (6) having an arc surface (6a) centered on the rotation axis (C1) of the arm (4) is erected on the surface (2b) of the case (2),
An arm support structure for a vehicle air conditioner, wherein a guide (4g) guided along the arc surface (6a) is provided on the arm (4).   The arm support structure for a vehicle air conditioner according to claim 1, wherein a plurality of the guides (4g) are arranged in a circumferential direction of the arc surface (6a).   3. The vehicle according to claim 1, wherein the guide (4 g) is erected on a surface (4 h) of the arm (4) facing the tip surface (6 b) of the rib wall (6). Air support arm support structure.

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