JPH0712733Y2 - Link mechanism with rotating shafts with different inclinations - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a link for transmitting a motion of rotating about a rotary shaft having different inclinations without causing rattling by the engagement of a round shaft and a long groove. It is related to the mechanism and can be widely used as a link mechanism in various devices including opening and closing operations of dampers in automobile registers.

[Conventional technology]

FIG. 4 is a perspective view of a register on both sides of an instrument panel of a conventional automobile, FIG. 5 (a) is a partial side view thereof, and FIGS. 4 (b) and (c) are explanatory views of its operation.

As shown in the figure, in the conventional register 1, since the duct extends obliquely downward, the rotation axis X ₁ of the operation knob 2 for opening and closing the damper and the rotation axis X ₂ of the damper shaft S are parallel to each other. Rather, it has an angle α. The round bar 31 at the tip of the arm 3 attached to the damper shaft S is attached to the end of the lever 21 integrated with the operation knob 2 in the longitudinal direction (radial direction).
And fitted in the long groove 22 'in provided, by the pivoting movement of the arrow R ₂ about the axis X ₂ to the arm 3 in rotational motion of the arrow R ₁ about the axis X ₁ of the lever 21 The direction of the damper (not shown) in the register 1 is changed by the rotational movement of the arm 3 indicated by the arrow R ₂ .

Further, since the axis X _{1 of the} lever 21 and the axis X _{2 of the} arm 3 form an angle α, the lever 21 and the arm 3 are on a straight line, that is, on the line LL in FIG. 5 (b). When occupying the arm, the round shaft 31 is at the base end P ₀ of the long groove 22 'and the arm is as shown in FIG.
It occupies a vertical state on the 21st surface, but the lever 21 rotates and the line M-
If it occupies the position of M, the round shaft 31 will move to the tip position P _{1 of the} long groove 22 '.
, And is in a tilted state with respect to the arm 21 surface. If Shimere similarly position of the arm 21 is a line N-N, round shaft 31 occupies a front end position P ₂ of the long grooves 22 ', and tilts to the side opposite to the P ₁ position relative to the arm 21. Therefore, the constant width W of the long groove 22 'is considerably larger than the diameter d of the round shaft 31 in order to allow the tilted state of the round shaft 31 to the left and right.

[Problems to be solved by the device]

Since the width W of the long groove 22 'of the lever 21 is larger than the diameter d of the round shaft 31 on the arm, the gap G between the long groove 22' and the round shaft 31 is a large gap G (round shaft: P ₀ position). ), So that when the operation knob 2 is turned by hand, the gap is played, that is, "play".
The operation knob 2 cannot drive the damper smoothly and accurately.

[Means and Actions for Solving the Problems]

For example, as shown in FIG. ₁ , in a long groove 22 provided in the radial direction at the tip of a lever 21 which rotates around an axis X ₁ as in the conventional case, an inclination angle α is formed with the rotation axis X ₁ of the lever 21. In the link mechanism in which the round shaft 31 at the tip of the arm 3 rotating about the axis X ₂ is inserted, the shape of the long groove 22 is as shown in FIG.
The width W ₀ on the base end side is substantially equal to the diameter d of the round shaft 31, and in order to cope with tilting left and right due to the sliding of the round shaft 31, a sloped surface symmetrical to the ridge line 23 from the base end to the tip in order. spread while including F _1, F _2, round shaft 31 is to prevent a gap between the side surface of the round shaft 31 and the long groove 22 occupies a position of the throat elongated groove 22.

Therefore, since the long groove 22 of the lever 21 and the round shaft 31 are always free from play (play), the rotation of the lever 21 is accurately and smoothly transmitted to the arm.

〔Example〕

As shown in FIG. 1 (a), the drive structure of the damper shaft S has the same structure as the conventional example (FIGS. 4 and 5 (a)).
That is, the register 1 inclined from the outlet bottom surface 10 at an angle β
The operation knob 2 is rotatably supported on the front horizontal bottom surface 10 of the bottom surface 11 of the rotatably centered on the axis X ₁ , and the lever 21 inclined rearward at the angle β is extended to form the long groove 22 on the lever. A damper shaft S integral with the arm 3 having a round shaft 31 protruding downward is rotatably supported around an axis X ₂ on the inclined bottom surface 11, and the lever 21 and the arm 3 are provided with the round shaft 31 in a long groove. It was inserted into 22 and connected.

2 is a perspective view of the tip of the lever 21, FIG. 3 (a) is a plan view thereof, FIG. 3 (b) is a sectional view taken along line bb of FIG. 3 (a), and FIG. 3 (c) is (a). 2 is a cross-sectional view taken along the line cc of FIG. 2 and the shape of the long groove 22 is as shown in FIG. 2 and FIG.
The width W _{0 of the} base end (inner end) is the same as or slightly larger than the diameter d of the cylindrical round shaft 31.
The space between 23 and 23 gradually expands to the maximum width W ₁ , and the vertically inclined outward inclined surfaces F ₁ and F ₂ separated by the ridge line also have a shape with a gradually increased inclination degree. Ridges 23,23 and inclined planes F ₁ , F ₂
Corresponds to the tilting of the round shaft 31 in the long groove 22 in the left-right direction, and therefore, of course, neither the ridge line nor the inclined surface exists on the base end surface and the tip end surface of the long groove 22.

The dimensional relationship between the long groove 22 and the round shaft 31 is as shown in FIGS. 1 (b) and (c), when the lever 21 and the arm 3 are located on a straight line (line LL). Is the position P ₁ (or P ₂ ) that occupies the innermost position P ₀ of the long groove 22 and is perpendicular to the surface of the lever 21 and the lever 21 and the arm 3 form the maximum angle.
Then, since the rotation center axes X ₁ and X _{2 form an} angle α, the round shaft 31 tilts to the right (or left) with respect to the lever 21 at the maximum, but it is clear from FIG. 1 (c). As shown, the slanted surface of the long groove 22
F ₁ and F ₂ have a shape that spreads to the maximum width W ₁ and has the maximum inclination so that the tilt position change of the round shaft 31 is absorbed. The planes F ₁ and F ₂ are always parallel to each other, and the width between the ridgelines on both side surfaces of the long groove 22 is a dimension for accommodating the round shaft 31 whose tilt degree is changed by movement substantially without a gap.

Therefore, in the damper drive link mechanism of the register of this example, since the connection between the lever 21 and the arm 3 is achieved by the relational structure in which the gap between the long groove 22 and the round shaft 31 of the novel structure is not generated, Any turning operation of the operation knob 2 was smoothly and accurately transmitted to the damper shaft.

The lever 21 on the operation knob side may be provided with a round shaft and the arm 3 side may be provided with a long groove. In short, in a rotation transmission link mechanism in which both rotation axes X ₁ and X ₂ are not parallel to each other by a long groove and a round shaft, the long groove shape can absorb the tilt displacement generated when the round shaft moves in the long groove without any gap. For example, the intended purpose and effect can be achieved.

Therefore, the present invention is effective in being applied to various high-accuracy devices which do not favor the occurrence of rattling and noise in a link mechanism formed by coupling a long groove having a crossed rotary shaft and a round shaft.

[Effect of device]

Regardless of the link mechanism in which both rotary shafts intersect, the round shaft always slides in the long groove without a gap, so that backlash and noise can be prevented from occurring, and the rotary motion can be smoothly transmitted.

[Brief description of drawings]

FIG. 1 is an explanatory view of a main part of the mechanism of the present invention, in which (a) is a partial side surface, (b) is a partial plane surface, and (c) is a partial cross section. FIG. 2 is a perspective view of a lever tip portion having a long groove of the present invention. FIG. 3 (a) is a plan view of the tip of the lever of the present invention.
(B) is the bb sectional view taken on the line of FIG. (A), (c) is the same cc sectional view. FIG. 4 is a perspective view of a conventional register, in which FIG. 5 (a) is a partial side surface thereof, and FIG.
(C) is a figure which shows the partial cross section. 1 ... register, 2 ... operation knob, 3 ... arm, 21 ... lever, 22 ... long groove, 23 ... ridge, 31 ... round shaft, X _1, X ₂ ... rotary shaft.

Claims (1)

[Scope of utility model registration request] _1. A lever (21) which rotates about an axis (X ₁ )
A link mechanism in which a round shaft (31) at the tip of an arm (3) that rotates around a lever rotation shaft (X ₁ ) and an inclined shaft (X ₂ ) is fitted in a radial long groove (22) of , Long groove (22)
Has a width substantially the same as the diameter of the round shaft (31) on the base end side, and supports the tilt displacement of the round shaft (31) to the left and right,
A link mechanism with rotating shafts having different inclinations, characterized in that symmetrical sloping surfaces (F ₁ , F ₂ ) are formed on the ridge line (23) in order from the base end to the tip end and spread out.