JPH0640549Y2 - Lifting device for front spoiler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a movable front spoiler device mounted on a lower portion of a front end of an automobile, and more particularly to a device for raising and lowering the spoiler.

[Conventional technology]

The front spoiler device is for improving the aerodynamic characteristics of the automobile at high speeds to improve high-speed stability, particularly road holding performance, and there are a fixed type and a movable type.

The movable spoiler device raises the spoiler and stores it in the vehicle body when the vehicle is traveling at low speed or on a rough road, and when the vehicle exceeds a predetermined speed, the spoiler device automatically lowers the spoiler. There is an advantage that the original function of can be effectively performed.

As such a movable spoiler device in the related art, there are those disclosed in, for example, JP-A-61-222875 and JP-A-59-156875.

[Problems to be solved by the device]

The front spoiler is generally formed to have a horizontally long length substantially equal to the width of the vehicle body in order to sufficiently exert its functions, and both end portions thereof are generally bent rearward.

When installing such a long spoiler on the vehicle body, 1
Since it is difficult to support at two points, we try to support at two or more points.

In order to raise and lower the spoiler smoothly and stably, it is necessary to raise and lower each of the support points in synchronization, which makes the structure complicated and makes adjustment and assembly complicated. Instead, the entire lifting device must be large, and a large space for storing this must be secured in the vehicle body.

In order to solve this problem, the applicant of the present application has proposed that a drive motor, a screw rod linked to the motor via a transmission means, a slider screwed to the screw rod, and one end of which is connected to the slider. We are developing a small-sized lifting device with a relatively simple structure, which has a lifting rod whose other end is connected to a spoiler.

However, in this device, when the slider reaches the upper limit position or the lower limit position, excess rotation of the screw rod often causes the slider to stop in a state in which a stopper made of an elastic body such as rubber is compressed. When the motor is reversed from the state and the slider is moved in the reverse direction, the slider is pressed against the threaded rod due to the compressive force of the stopper of the elastic body, resulting in a so-called stick state, which may cause malfunction.

Further, a slight sticking of the slider, wear of the screw rod, or the like may cause a similar stick phenomenon, which may cause malfunction.

The present invention provides a front spoiler improved so that even if such a stick phenomenon occurs, it can be easily and naturally resolved under normal operating conditions without the operator's being aware of it. The purpose is to provide a lifting device.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a motor capable of rotating in the forward and reverse directions, a transmission means linked to a rotation shaft of the motor, a screw rod linked to the transmission means, and a screw rod screwed to the screw rod. And a slider that slides up and down in a vertical direction, and a lifting rod that is associated with the slider and that lifts and lowers the spoiler to a storage position for storing the spoiler in a vehicle body and a use position for hanging the spoiler downward from the vehicle body. Two substantially fan-shaped recesses symmetrically opposed to each other about an axis are formed on a surface of the device that is connected to the screw rod, and the recesses are formed in the recesses.
It is characterized in that two projecting portions which are provided on the threaded rod so as to face both sides orthogonal to the axis are engaged with each other so as to form a required play in the rotation direction in the recessed portion.

[Action]

According to the present invention, the driving force to the screw rod is transmitted after idling by the play of the motor, so that the slider supporting the load of the spoiler is transferred to the motor when moving from the lower limit to the upper limit. Such initial load can be reduced.

In addition, inertial force is generated in the motor and transmission member during idling,
Since this momentum acts as an impact force on the screw rod, even if a stick or the like is generated on the slider, it can be operated smoothly.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of the lifting device according to the present invention with the case lid removed, FIG. 2 is a cross-sectional plan view taken along the line AA in FIG. 1, and FIG. FIG. 3 is a front external view of a vehicle equipped with the above device.

In FIG. 3, (1) is a vehicle body, (2) is a front spoiler, and (3) is a pair of left and right lifting devices provided on both sides of the front end of the vehicle body (1). ) Can be moved up and down between a use position hanging from the front end of the vehicle body (1) shown by a solid line and a storage position stored in the front end portion of the vehicle body (1) shown by an imaginary line.

Each of the left and right lifting devices (3) has the same structure symmetrical to each other, and only one of them will be described below.

As shown in FIG. 1, the lifting device (3) has a case (5) fixed to the vehicle body (1) via a bracket (4).
And a motor (7) provided vertically in the case (5) and provided with a rotating shaft (6) capable of forward and reverse rotation in a downward direction.
A main gear (9) as a transmission means connected to the rotary shaft (6) via a coupling (8), a driven gear (10) meshing with the main gear, and a driven gear (10). By engaging the screw rod (11), the square nut (12) screwed with the screw rod (11), and the nut (12), the inside of the case (5) is guided by an appropriate guide member. A slider (13) that slides vertically in parallel with the screw rod (11), and an upper end pivotally attached to the slider (13) and the lower end protruding from the case (5) is fixed with the spoiler (3), It comprises an elevating rod (14) for elevating the spoiler (2) by moving together with the slider (13).

Reference numeral (15) is a bellows cover for covering a portion of the lifting rod (14) projecting from the case (5), where dust, rainwater, etc. are lifted (14).
To prevent it from adhering to.

(16) is a protective cover for concealing the contracted bellows cover (15) when the hoisting rod (14) is raised, that is, when the spoiler (2) is in a non-operating state, and is provided between the folds of the bellows cover (15). Water droplets will adhere, which freezes and the bellows cover (1
It is intended to prevent the extension of 5) and to prevent cracks from occurring.

(17) and (18) are elastic shock absorbers fixed to the upper and lower surfaces of the slider (13), and when the slider (13) moves to the upper limit or the lower limit position, the metal contacts the case (5) and the like. Is being prevented.

Next, the driven gear (10) and the screw rod (1
The structure of the engaging portion of 1) will be described.

As shown in FIGS. 4 to 6, on the upper surface of the driven gear (10), there are two substantially fan-shaped recesses (10b) symmetrically opposed to each other around the central shaft hole (10a). Has been formed. On the other hand, at the lower end of the screw rod (11), a projection relatively extending toward both sides orthogonal to the axis of the screw rod (11) and having a shape capable of allowing a predetermined angle of play in the rotation direction within the recess (10b). (11a) and a support shaft (11b) projecting downward from the (11a) are connected to each other.

The driven gear (10) and the screw rod (11) include a support shaft (11b) of the screw rod (11) and a driven gear (1) via a collar (19).
The shaft hole (10a) of (0) is rotatably penetrated, and the projection (11a) is loosely fitted in the recess (10b) for assembly.

The lower end of the support shaft (11b) protruding downward from the driven gear (10) is supported by the thrust bearing (20) fitted in the case (5) (see FIG. 4).

As shown in FIG. 6, the driven gear (10) and the threaded rod (11) are allowed to idle at their engaging portions in the forward and reverse directions by a required angle (90 degrees in this embodiment). Since the play is formed, in the screw rod (11), when the driven gear (10) is initially rotated in either direction, the driven gear (10) rotates in that direction by the angle described above, and thus, in the recess (10b). It is driven by contact between the side wall and the protrusion (11a).

In this way, when the driven gear (10) as the transmission means and the screw rod (11) are provided with a play in the rotational direction, the motor (7), which is subjected to a large load, is started at the time of forward and reverse activation. ,
In particular, when the slider (13) starts up the motor (7) in the upper and lower limit positions while the elastic cushioning bodies (17) and (18) are slightly compressed and stopped, the initial load is significantly reduced. can do.

Further, even if the slider (13) does not operate smoothly due to biting or sticking, or becomes inoperable, the motor (7) and driven gear (10) rotate in the forward and reverse directions by the amount of play. Can, and this gear (10)
The inertial force of the idling of the rod acts as an impact force on the screw rod (11), so by rotating the motor (7) forward and backward several times, the stick state is canceled and the slider (13) moves smoothly. Operation is obtained. Therefore, the motor (7) can be prevented from being overloaded and the durability is improved.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications in design and embodiments can be made without departing from the concept of the invention.

For example, in the above embodiment, the play in the rotational direction is provided between the driven gear (10) and the screw rod (11), but this is
It may be provided in the coupling (8) that connects the rotating shaft (6) of the motor (7) and the driving gear (9). in this case,
For example, a plurality of pins may be provided so as to project from one side of the coupling, and an arc-shaped elongated hole that engages with the pins may be formed at the other side.

[Effect of device]

According to the present invention, the screw rod has the motor and the transmission means,
At the initial stage of rotation in either direction, the motor is idled by the amount of play and then driven, so that the initial load at the time of forward and reverse startup of the motor can be reduced, and the slider can be operated smoothly.

In addition, the inertial force when the transmission means (driven gear) idles by an amount of play acts as a large impact force on the screw rod, and when the concave portion abuts the protrusion, However, even if a stick etc. should occur on the slider, etc., the screw rod can be rotated with a large torque due to the rotational moment about the shaft at that time. It is eliminated immediately in the early stage of operation.

Moreover, the stick state can be resolved naturally without the operator having to be aware of it, and since the motor is not overloaded, it can be made smaller and lighter, and is durable and reliable. It will be excellent.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a lifting device according to an embodiment of the present invention with a case lid removed, and FIG. 2 is a cross-sectional plan view taken along the line AA in FIG. FIG. 3 is a partially cutaway external perspective view showing a front portion of an automobile equipped with a spoiler, FIG. 4 is a vertical sectional view of an engaging portion between a driven gear and a screw rod, and FIG. And FIG. 6 is an exploded perspective view of an engaging portion between the screw rod and the screw rod, and FIG. 6 is a cross-sectional plan view taken along the line BB in FIG. (1) Vehicle body, (2) Front spoiler (3) Lifting device, (5) Case (6) Rotating shaft, (7) Motor (8) Coupling, (9) Driving gear (transmission means) (10) Driven gear ( Transmission means), (10b) recess (11a) protrusion, (11) screw rod (12) square nut, (13) slider (14) lifting rod, (15) bellows cover (16) protective cover, (17) ( 18) Elastic buffer

Claims (1)

[Scope of utility model registration request] 1. A forward / reverse rotatable motor, a transmission means linked to a rotary shaft of the motor, a screw rod linked to the transmission means, and a slider which is screwed with the screw rod and slides up and down. And a lifting rod that is linked to the slider and that lifts and lowers the spoiler to a storage position that is stored inside the vehicle body and a use position that hangs downward from the vehicle body, the linkage to the screw rod in the transmission means. Two substantially fan-shaped recesses that symmetrically face each other around the axis are formed on the surface, and two protrusions provided on the screw rod facing both sides orthogonal to the axis are formed in the recess. A lifting device for a front spoiler, which is engaged so as to form a required play in the rotation direction in the recess.