JP2002061629A - Link part and support structure thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support structure of a link part capable of stabilizing the contact of a link part with a small screw washer surface to restrain run-out of the link surface, and reducing the rotating torque of the link part main body and the operating torque of the whole link mechanism to enable smooth operation. SOLUTION: In this support structure, a link lever 15 is supported on the tip of a support shaft 16 by the small screw 17, and a small screw washer 20 for fitting the small screw 17 is provided in the opposite surface to the support shaft 16 in the link lever 15. A surface of the link lever 15 abutting on the small screw washer 20 is provided with annular projections 22A, 22B formed concentrically with the small screw 17, and the tops of the annular projections 22A, 22B are brought into sliding contact with the small screw washer 20. By this structure, the contact of the link lever 15 and the small screw washer surface is stabilized to restrain run-out of the link surface, and the rotating torque of the link lever 15 main body and the operating torque of the whole link mechanism can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a link component and a support structure thereof, and more particularly, to a contact structure of a mounting seat surface of a link component rotatably mounted on a support shaft with a support shaft side.

[0002]

2. Description of the Related Art Conventionally, as a support structure for a link component of this type, there is a structure using a link lever 1 as shown in FIG. The link lever 1 is provided in an air conditioner unit for rotating an air flow control door for controlling the flow of hot air or cold air in an air conditioner such as an automobile. Specifically, the link lever 1 is rotatably attached to the support shaft 3 on the air conditioning unit side by a screw 2. The screw 2 rotatably holds the link lever 1 via a screw washer 4. Further, a contact cylinder portion 5 surrounding the support shaft 3 so as to surround the support shaft 3 is provided on the support shaft 3 side.
Are in sliding contact with the contact cylinder 5. At this time, a clearance of about 0.1 mm is usually set between the link lever 1 and the screw washer 4 so that the screw washer 4 does not press the link lever 1 to restrict the sliding.

[0003] Other support structures for the link portion include:
A link lever device disclosed in Japanese Patent Application Laid-Open No. 8-161068 is known. In this link lever device, the link lever is fitted to the support shaft, and a support that surrounds the support shaft and a support that rotatably clamps the link lever by elastic pressing force with a lever holding piece provided at the tip of the support shaft. It has a structure.

[0004]

However, in the former link lever support structure, it is necessary to set a clearance of about 0.1 mm between the screw washer 4 and the link lever 1, so that the link surface is not formed when the link is operated. There is a problem that the rotation torque of the link lever 1 is increased due to blurring (out of contact with the plane orthogonal to the support shaft 3). At the same time, since the link surface is inclined, the operating torque of the entire link mechanism increases.

Also, in the latter link lever device, similarly to the link lever support structure, the lever holding piece at the tip of the support shaft is deformed, so that when the link lever is rotated, the link surface is shaken. There is a problem that the rotational torque of the link lever 1 increases. Along with this, there is a problem that the operating torque of the entire link mechanism increases due to the inclination of the link surface.

Further, when the link lever and the screw washer are brought into plane contact, the rotational torque is further increased, and there is a problem that it is difficult to provide a highly accurate plane tolerance (flatness) to both.

Therefore, the present invention stabilizes the contact between the link component and the screw washer surface to suppress the deflection of the link surface, and also operates smoothly by reducing the rotational torque of the link component body and the operating torque of the entire link mechanism. It is an object of the present invention to provide a link component and a supporting structure thereof.

[0008]

According to the first aspect of the present invention,
A link component rotatably sandwiched between the supported base and the washer on the supported base, and an annular projection formed concentrically with a rotation center axis on a surface that comes into contact with the washer. The top of the annular projection abuts on the washer.

According to the first aspect of the present invention, since the link component comes into contact with the washer by the annular projection, the contact area with the washer is extremely small, and the rotational torque of the link component is reduced. There is action. Further, since the washer surely comes into contact with the annular projection, the link surface can be prevented from being shaken, and the entire link mechanism can be smoothly operated.

According to a second aspect of the present invention, there is provided the link component according to the first aspect, wherein a cross-sectional shape of the annular projection is:
It is characterized by being semicircular.

Therefore, according to the second aspect of the present invention, in addition to the operation of the first aspect, the contact between the top of the annular projection and the washer is a point contact (line contact). This has the effect of further reducing the contact area and further reducing the rotational torque.

Further, the invention according to claim 3 is the invention according to claim 1.
Alternatively, in the link component according to claim 2, a plurality of the annular protrusions are formed concentrically.

Therefore, according to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, since a plurality of annular projections are formed on the link component, the diameter of the washer can be reduced. The degree of freedom can be increased.

According to a fourth aspect of the present invention, there is provided the link component according to any one of the first to third aspects, wherein the annular protrusion is formed on both surfaces of the link component. And

Therefore, according to the fourth aspect of the invention, in addition to the effects of the first to third aspects of the present invention, since the annular projections are formed on both surfaces of the link component, the front and back of the link component can be used. It becomes possible to use it inverted.

According to a fifth aspect of the present invention, a link member is provided with a screw member at a tip of a support shaft provided on a supported substrate and having a screw hole so as to rotate on a plane substantially orthogonal to the support shaft. A support structure for a link component, which supports and is provided with a washer to which the screw member is fitted on a surface of the link member on the side opposite to the support shaft, the surface being in contact with the washer of the link component. An annular projection formed concentrically with the screw member is formed, and the top of the annular projection is in sliding contact with the washer.

According to the fifth aspect of the present invention, the link member and the washer are supported on the support shaft by the screw member, and the link component is sandwiched between the support shaft and the washer. Since the link component slides on the washer at the top of the annular protrusion, the rotational torque is set to be small. Also,
Since the annular protrusion of the link component is securely pressed by the washer as a whole, it has an effect of preventing the link surface from being shaken. For this reason, smooth rotation and reduction of the rotation torque of the entire link mechanism can be realized, and a highly durable and highly reliable link component support structure can be realized.

According to a sixth aspect of the present invention, there is provided the link component supporting structure according to the fifth aspect, wherein the annular protrusion is
A plurality is formed concentrically.

Therefore, in the invention according to claim 6, in addition to the effect of the invention according to claim 5, the washer having large and small diameters can be applied by forming the plurality of annular projections concentrically. it can.

Further, the invention described in claim 7 is the same as the invention described in claim 5.
Or the support structure of the link component according to claim 6,
A sliding cylinder portion that slides on the link component surrounding the support shaft is formed integrally with the support shaft.

According to the seventh aspect of the present invention, in addition to the functions of the fifth and sixth aspects of the present invention, since the sliding shaft is integrally formed so as to surround the support shaft, the link is provided. It is possible to further prevent the link surface of the component from being blurred.

According to an eighth aspect of the present invention, there is provided a link component supporting structure according to any one of the fifth to seventh aspects, wherein the supported base is a unit case of an air conditioning unit for a vehicle. The unit case can support the link component on the left and right side surfaces in the vehicle width direction, and the annular protrusion of the link component is formed on both surfaces.

Therefore, in the invention described in claim 8, in addition to the effects of the inventions described in claims 5 to 7, the unit case can support the link parts on the left and right side surfaces in the vehicle width direction. For example, the vehicle air conditioning unit can be made to correspond to a right-hand drive vehicle or a left-hand drive vehicle.
At this time, since annular projections are formed on the front and back surfaces of the link component, it is possible to use link components of the same standard regardless of the side surfaces of the unit case, and it is possible to reduce the number of components. .

[0024]

According to the first aspect of the present invention, since the link component comes into contact with the washer at the annular projection, the contact area with the washer is extremely small, and the rotational torque of the link component is reduced. There is. Further, according to the first aspect of the present invention, since the washer surely comes into contact with the annular projection, the link surface can be prevented from being shaken, and the entire link mechanism can be smoothly operated.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the contact area between the link component and the washer can be further reduced, and the rotational torque can be further reduced. .

According to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, since a plurality of annular projections are formed on the link component, the diameter of the washer can be reduced. The degree of freedom can be increased, and a versatile link component can be obtained.

According to the invention described in claim 4, claims 1 to 1 are provided.
In addition to the effect of the third aspect of the present invention, since the annular projections are formed on both surfaces of the link component, the link component can be used upside down. Therefore, there is an effect of suppressing an increase in the number of standardized link components.

According to the fifth aspect of the present invention, since the link component slides on the washer at the top of the annular projection, there is an effect of reducing the rotational torque. According to the fifth aspect of the present invention, the annular projection of the link component is securely pressed by the washer as a whole, so that the link surface is prevented from being shaken. As a result, smooth rotation and reduction of the rotation torque of the entire link mechanism can be realized, and a highly durable and highly reliable link component support structure can be realized.

According to the sixth aspect of the present invention, in addition to the effect of the fifth aspect of the present invention, since a plurality of annular projections are formed concentrically, a large and small diameter washer can be applied. it can.

According to the seventh aspect of the invention, in addition to the effects of the fifth and sixth aspects of the present invention, the link is formed integrally so that the sliding shaft surrounds the support shaft. This has the effect of further preventing the link surface of the part from being blurred.

According to the invention described in claim 8, claims 5 to 5 are provided.
In addition to the effect of the invention described in claim 7, since the unit case can support the link parts on the left and right side surfaces in the vehicle width direction, for example, a right-hand drive vehicle or a left-hand drive vehicle corresponds to the vehicle air conditioning unit. Can be done. At this time, since annular projections are formed on the front and back surfaces of the link component, it is possible to use link components of the same standard regardless of the side surfaces of the unit case, which has the effect of reducing the number of components. .

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a link component and a support structure thereof according to the present invention will be described below based on an embodiment shown in the drawings. This embodiment is an example in which the present invention is applied to an air conditioning unit for a vehicle, as shown in FIG.

The link component and the support structure of the present embodiment are applied to an air conditioning unit 10 for a vehicle as shown in FIG. Reference numeral 11 in the figure indicates a unit case.

The unit case 11 has a left and right separated shape joined by, for example, fastening screws.
The unit case 11 is formed so that it can be used for both a right-hand drive vehicle and a left-hand drive vehicle. FIG. 1 shows a case where the unit case 11 is used for a right handle. In the present embodiment, a blower (not shown) is coupled to the left side (the right side in FIG. 1) of the unit case 11 when viewed from the right driver's seat.

Reference numeral 12 in FIG. 1 denotes a hood for connecting a blower to the unit case 11. Also,
A hot water circulating pipe 13 for circulating hot water heated in the engine room side to a heating heat exchanger (heat core) (not shown) is provided at a lower portion of the unit case 11.
It is piped to pass under. The hood section 12
A cooling heat exchanger (evaporator) (not shown) is arranged in the inner part of the figure. This cooling heat exchanger has the structure shown in FIG.
An expansion valve indicated by a middle code 14 is connected.

In the unit case 11, an air volume control door for performing various air volume controls (not shown) is appropriately disposed. A support shaft 1 for rotatably supporting a link lever 15 as a link component for transmitting a driving force to these air volume control doors is provided on a side portion of the unit case 11.
6 protrudes in the vehicle width direction. The support shaft 16 has a screw hole 18 into which a screw 17 for supporting the link lever 15 is screwed. Link lever 15
Is provided with a mounting hole 19 through which the screw 17 is inserted. As shown in FIG. 1 and FIG.
8, the mounting hole 19 of the link lever 15 is aligned,
Screw washer 2 on the surface opposite to the mounting surface of link lever 15
0, screw 17 to screw washer 20, mounting hole 1
9, the link lever 15 is rotatably supported on the support shaft 16 by screwing the screw 17 into the screw hole 18.

Next, the structure of the link lever 15 will be described with reference to FIGS. FIG. 2 shows the link lever 15
FIG. 3 is a side view showing one side of FIG.
It is a side view which shows the other side of. FIG. 4 is an exploded perspective view of a mounting structure of the link lever 15.

The link lever 15 used in this embodiment is
It is a substantially triangular plate, and a mounting hole 19 is opened at a portion closer to one vertex portion 21 than the central portion.
Two annular projections 22A and 22B are formed concentrically around the mounting hole 19 so as to surround the mounting hole 19. The annular projections 22A and 22B have a semicircular cross section and are set to the same height. An annular reinforcing rib 23 is formed outside the annular projections 22A and 22B so as to surround them. The annular protrusions 22A and 22B and the annular reinforcing rib 23 correspond to FIG.
Also, as shown in FIG. 3, it is formed at the same position on the back side of the link lever 15.

A connecting projection 2 for connecting to another link component (not shown) is provided on the vertex portion 21 so as to protrude therefrom. The connection protrusion 24 is also provided at the same position on the back surface side of the apex portion 21, as shown in FIGS.

Further, the other apex portion 25 of the link lever 15 has a first cam groove 2 having a predetermined length facing the mounting hole 19.
6 are formed. Further, a second cam groove 28 having a predetermined length and a predetermined shape is formed on the other vertex portion 27 of the link lever 15 toward the vertex portion 25. In addition,
As shown in FIGS. 2 and 3, the first cam groove 26 and the second cam groove 28 are also formed at the same position on the back surface side. In addition, a slide projection provided on another link portion (not shown) is inserted into the first cam groove 26 and the second cam groove 28.

Also, the link lever 15 has a structure shown in FIGS.
As shown in FIG. 7, reinforcing ribs 29 are appropriately formed.
The link lever 15 can be used upside down depending on whether the vehicle air conditioner 10 is applied to a right-hand drive vehicle or a left-hand drive vehicle. For this reason, as shown in FIGS. 2 and 3, a recognition symbol 30 is provided on the side surface of the link lever 15 so that it can be confirmed whether the link lever 15 is used for a right handle or a left handle. Specifically, as shown in FIG. 1, when the vehicle air conditioner 10 is used for a right-hand drive, the unit is arranged such that the recognition symbol 30 indicated by “R” is directed outward on the link lever 15. By being combined with the side surface of the case 11, proper mounting is performed. Conversely, as shown in FIG.
When using for the left handle, the link lever 1
By attaching the recognition symbol 30 indicated by “L” in FIG. 5 to the side surface of the unit case 11 so that the recognition symbol 30 faces outward, proper mounting is performed.

Next, the link lever 1 will be described with reference to FIGS.
The support structure and operation / operation of No. 5 will be described. FIG. 5 is a sectional view showing a state in which the structure in which the link lever 15 is supported by the support shaft 16 is cut along the central axis, and FIG. 6 is an enlarged sectional view of the support structure.

As shown in FIG.
The mounting hole 19 of the link lever 15 is aligned with the screw washer 20 on the surface opposite to the mounting surface of the link lever 15.
And screw 17 to screw washer 20 and mounting hole 19
By screwing the screw 17 into the screw hole 18,
The link lever 15 is rotatably supported on a support shaft 16. In addition, around the support shaft 16, a cylindrical sliding contact cylindrical portion 3 is provided.
1 are provided integrally.

In this embodiment, two annular projections 22A formed around the mounting hole 19 of the link lever 15 are provided.
A screw washer 20 having a large diameter so as to cover both of 22B is used. For this reason, two annular projections 22A,
22B is in uniform contact with the surface of the screw washer 20. Further, as shown in FIG. 5, the annular reinforcing rib 23 formed on the surface opposite to the surface with which the screw washer 20 abuts,
It is set so as to be in contact with the sliding contact tube portion 31 surrounding the support shaft 16.

In such a supporting structure, when the link lever 15 is rotated by, for example, another link component, the screw washer 20 and the link lever 15 are in contact with only the tops of the annular projections 22A and 22B. Therefore, the contact area is extremely small, and the rotational torque of the link lever 15 can be significantly reduced. Also, screw washer 2
Since the screw 17 is supported between 0 and the tops of the annular protrusions 22A and 22B so that the clearance becomes 0, the link surface does not move on the link lever 15,
Also in this regard, an increase in rotational torque can be suppressed.
On the other hand, on the back surface of the link lever 15 (the surface opposite to the surface with which the screw washer 20 abuts), the annular reinforcing rib 29 and the sliding contact tube portion 31 are in sliding contact with each other. It has the effect of reducing the rotational torque.

As described above, in the link component and the support structure of the present embodiment, since the tops of the annular projections 22A and 22B having a semicircular cross section abut against the screw washer 20, the rotational torque between the link lever 15 and the screw washer 20 is reduced. can do. In the present embodiment, the two annular protrusions 22
A screw washer 20 having a diameter so as to abut both A and 22B was used. However, as shown in FIG. 7, a screw washer 20A having a short diameter so as to abut only the inner annular projection 22A was used. In such a case, a similar effect can be obtained. For this reason, the degree of freedom of the diameter dimension of the used screw washer can be increased.

In this embodiment, since the annular projections 22A and 22B are formed on the front and back surfaces, the unit case 1
The same link lever 15 can be used for both the case where 1 is used for the right handle and the case where it is used for the left handle, and it is possible to prevent the type of link parts from increasing.

Further, in the present embodiment, the annular projection 22
By securely contacting the screw washers 20 with the tops of the A and 22B, the link surface can be stabilized, and the driving force of the entire link mechanism can be smoothly transmitted.

In this embodiment, the link lever 15
When the mold of the link lever 15 needs to be improved and tuned in order to correct or adjust the deviation of the link surface, etc. at the time of initial molding, the entire mold must be replaced or significantly changed. There is no need to change the shape.
That is, the link lever 15 has the annular protrusions 22A and 22B.
Therefore, only the portion corresponding to the annular projections 22A and 22B in the mold needs to be tuned. Specifically, the annular protrusions 22A, 22B
Since only the height adjustment and the change of the top shape need to be performed, the improvement and tuning of the mold can be performed very easily. As a result, the cost of the mold can be significantly reduced.

In this embodiment, the screw washer 20
Metal, resin, etc. can be used as a constituent material of. Further, the link lever 15 can be made of a resin, a metal, or the like, and the rotational torque can be reduced without being influenced by the material.

Although the embodiments have been described above, the present invention allows various design changes accompanying the gist of the configuration. For example, in the embodiment described above, the present invention is applied to the link component used in the vehicle air conditioner. However, the present invention can be applied to link components in various fields.

In the above embodiment, the annular projection 2
Although the cross-sectional shapes of 2A and 22B are set to be semicircular, they may be rectangular, such as semi-elliptical or trapezoidal.

Further, in the above-described embodiment, the annular protrusions 22A and 22B are formed on both the front and back surfaces of the link lever 15, however, it is of course possible to form them on only one surface.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a link component support structure according to the present invention.

FIG. 2 is a side view showing one side surface of the link component of the embodiment.

FIG. 3 is a side view showing the other side surface of the link component of the embodiment.

FIG. 4 is an exploded perspective view showing a support structure of the embodiment.

FIG. 5 is a sectional view showing a support structure of the embodiment.

FIG. 6 is a partially enlarged cross-sectional view showing a support structure of the embodiment.

FIG. 7 is a partially enlarged sectional view showing a state in which a screw washer is replaced in the embodiment.

FIG. 8 is an exploded perspective view showing another example of mounting the support structure of the embodiment.

FIG. 9 is a partial sectional view showing a conventional link support structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Air conditioning unit for vehicles 11 Unit case 15 Link lever (link part) 16 Support shaft 17 Screw (screw member) 18 Screw hole 20 Screw washer 22A, 22B Annular protrusion 31 Sliding contact cylinder

Claims (8)

[Claims] 1. A link component (15) rotatably held between a supported base (16) and a washer (20) on the supported base (11, 16) side, wherein the washer (20) is provided. ) Are formed concentrically with respect to the center axis of rotation on the surface in contact with the annular projections (22A, 22B), and the tops of the annular projections (22A, 22B) abut on the washer (20). A link component (15) characterized by the following. 2. The link component (15) according to claim 1, wherein the annular projection (22A, 22B) has a semi-circular cross-sectional shape. 3. The link component (15) according to claim 1, wherein a plurality of the annular protrusions (22A, 22B) are formed concentrically. Parts (15). 4. The link component (15) according to claim 1, wherein the annular protrusions (22A, 22B) are formed on both surfaces of the link component (15). A link component (15). 5. A tip of a support shaft (16) provided on a supported substrate (11) and having a screw hole (18) formed thereon, so as to rotate on a surface substantially orthogonal to the support shaft (16). While supporting the link component (15) with the screw member (17),
A support structure for a link component (15) provided with a washer (20) on a surface of the link member (15) opposite to the support shaft (16) to which the screw member (17) is fitted. An annular projection (22A, 22B) formed concentrically with the screw member (17) is formed on a surface of the link component (15) that comes into contact with the washer (20). (22A, 22B) has the washer (2
The link component (1) is in sliding contact with (0).
5) The support structure. 6. The link component (15) according to claim 5, wherein a plurality of said annular projections (22A, 22B) are formed concentrically. 15) The support structure. 7. A support structure for a link component (15) according to claim 5 or claim 6, wherein the link component (1) surrounds the support shaft (16).
5) The sliding cylindrical portion (31) that slides on the supporting shaft (16).
A support structure for a link component (15), wherein the support structure is formed integrally with the link component (15). 8. The support structure for a link component (15) according to claim 5, wherein the supported base (11) is a unit case of a vehicle air conditioning unit (10). (11), wherein the unit case (11) can support the link component (15) on the left and right side surfaces in the vehicle width direction, and the link component (15)
The support structure for a link component (15), wherein the annular protrusions (22A, 22B) are formed on both surfaces.