JP2002340076A - Mechanical speed governing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanical speed governing device equipped with excellent durability allowing maintaining the speed governing accuracy even through a long period of service by introducing a mechanical structure not using any filling oil. SOLUTION: The mechanical speed governing device is to adjust automatically the rotating speed of a second member installed rotatably relative to a first member and includes a rotation part 3 to make relative rotation with the second member, wherein a meandering engagement groove 5 is provided in a stationary side part 4 to be stationary relative to the rotation part, and on the other side, an engaging projection 6 is provided to be engaged with the groove in such an arrangement that the projection or groove is slidable in the meandering direction in compliance with the meander of the groove, and thereby if the rotational speed of the second member relative to the first member is low, the sliding of the projection or groove moves according to the rotational speed so that rotational resistance owing to the meander of the groove remains small, and if the rotational speed is large, the rotational resistance becomes large.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical type speed control device which automatically controls the speed without using a sealed oil unlike an oil damper device.

[0002]

2. Description of the Related Art By adopting a structure in which turning resistance increases when a user tries to turn rapidly,
2. Description of the Related Art A speed control device (damper device) that automatically controls a speed to rotate at a low speed is used in various fields.

For example, there is a case where an opening / closing body is rotatably provided on a main body such as a toilet body and its toilet lid or a toilet seat, and when the hand is released, the opening / closing body is slowly rotated downward and closed. When an opening / closing body that is urged to open such as a car trunk is unlocked (unlocked), the opening / closing body does not abruptly open, but slowly rises and turns to open.

[0004] In such a case, the above-mentioned speed governing device is provided in any case, and a large resistance is generated when the rotating body is suddenly rotated. Even if it is energized, it is configured to automatically and slowly rotate by the rotation resistance. Further, even if it is attempted to rotate by hand, the rotation resistance becomes a torque, so that it cannot rotate rapidly.

[0005] Most of the conventional governing devices use an oil damper device.

That is, for example, a rotating portion is arranged in the enclosed oil so that the viscosity of the oil is used so that when the rotating speed is increased, a large rotating resistance is generated.

[0007] However, such an oil damper device does not generate a predetermined rotation resistance due to the degree of pressure contact on the sliding surface of the rotation portion as compared with a mechanical type that does not use the enclosed oil. Although it has the advantage of being able to withstand long-term use, there is a risk of oil leakage because oil must be sealed, and it must be manufactured so that oil does not leak. In addition, there is a problem that the mass productivity is inferior, the cost becomes higher, and the temperature characteristic is obtained.

The present invention uses a mechanical system that does not use sealed oil, so that there is no need for a seal structure to prevent or prevent oil leakage, and it can be easily manufactured without using sealed oil, and excels in mass productivity. In addition, unlike the conventional mechanical type that generates a predetermined rotational resistance simply by pressing against the sliding surface, similar to the oil damper device, the governing accuracy is maintained even during long-term use and the durability is excellent. The purpose of the present invention is to provide a revolutionary mechanical governing device.

[0009]

The gist of the present invention will be described with reference to the accompanying drawings.

A mechanical speed controller for automatically adjusting a rotation speed of a second member 2 rotatably provided with respect to a first member 1, wherein the relative speed is controlled by the relative rotation of the second member 2. A meandering engagement groove 5 is formed in one of the rotating portion 3 that rotates and a fixed side portion 4 that is a fixed side with respect to the rotating portion 3 or a bearing portion 4 that supports the rotating portion 3. And the other is provided with an engaging projection 6 which engages with the engaging groove 5 so that the engagement between the engaging groove 5 and the engaging projection 6 is maintained during the relative rotation. In accordance with the meandering of the engaging groove 5, the engaging convex portion 6 or the engaging groove 5 is provided so as to be slidable in the meandering direction, and if the rotation speed of the second member 2 with respect to the first member 1 is small. Since the sliding movement of the engaging protrusion 6 or the engaging groove 5 follows, the rotational resistance due to the meandering of the engaging groove 5 is small. Those relating to a mechanical governor, characterized in that opposite the rotational resistance the greater the rotational speed is configured to be large.

When the engaging protrusion 6 is relatively rotated with respect to the engaging groove 5, the engaging groove 5 meanders in the left-right direction with respect to the rotation direction of the engaging protrusion 6. And
2. The mechanical governing device according to claim 1, wherein said engaging projections are configured to be slidable relative to said engaging grooves in the left-right direction which is the meandering direction. It is.

When the second member 2 is relatively rotated with respect to the first member 1 by a constant load, the engagement groove 5 has a smooth meandering curve. The mechanical governing device according to any one of claims 1 and 2, characterized in that the relative rotational speed is increased at a substantially constant low speed by increasing the rotational resistance as the rotational speed increases. It is related.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.

When the second member 2 is relatively rotated with respect to the first member 1, the engagement groove 5 and the engagement protrusion 6 remain engaged with each other, and the engagement protrusion 6 extends along the engagement groove 5. Rotate relatively.

That is, since the engaging protrusion 6 is provided so as to be slidable relatively in the meandering direction of the engaging groove 5, the engaging protrusion 6 is engaged with the engaging groove 5 according to the meandering of the engaging groove 5. Relative to the engagement groove 5 while sliding relative to the
The second member 2 rotates relatively.

Accordingly, when the second member 2 rotates slowly, the relative sliding movement of the engaging protrusion 6 with respect to the engaging groove 5 sufficiently follows the meandering of the engaging groove 5, so that the rotation is large. On the contrary, if the user tries to rotate quickly without causing any dynamic resistance, the relative sliding movement of the engaging projection 6 cannot follow the meandering of the engaging groove 5 due to inertia or the like, and the sliding movement along the meandering engaging groove 5 is not possible. As a result, the engaging convex portion 6 is forcibly rotated and moved, so that large turning resistance is generated.

Further, since the engaging projection 6 has a predetermined mass m, a force (F = mα) for causing the engaging projection 6 to generate an acceleration α by rotation is proportional to the rotation speed. It becomes resistance.

Therefore, when the second member 2 is relatively rotated by a constant load such as its own weight or a spring bias, the second member 2 cannot be rotated quickly due to the phenomenon of the increase in the rotation resistance, and is automatically rotated to a predetermined position. It turns at a low speed.

In the case of rotating by hand, power or the like,
If the user tries to turn it quickly, a large turning resistance is generated. This turns into a turning torque, which makes it difficult to turn sharply and makes it possible to turn only slowly. .

That is, for example, when the engaging protrusion 6 rotates relative to the engaging groove 5, the engaging groove 5 meanders in the left-right direction with respect to the rotation direction of the engaging protrusion 6. And the engaging projection 6
Is configured to be slidable relative to the engagement groove 5, and the engagement groove 5 is configured to draw a smooth meandering curve. When the motor 2 is relatively rotated by a constant load, when the rotation speed is increased, the rotation resistance is increased, so that the motor 2 is automatically adjusted to a substantially constant low speed and relatively rotated.

Therefore, for example, by using the present invention for the rotation connecting portion between the main body and the opening / closing body, a large torque can be generated for a sudden rotation of the opening / closing body, and the opening / closing body can be moved from the open position. In the case of closing and rotating down by its own weight,
The opening / closing body can be configured to turn downward and close at a substantially constant low speed without sudden closing.

Therefore, an innovative mechanical governing device which maintains the adjustment accuracy even in a long-term use and excels in durability without using the enclosed oil and which does not need to worry about oil leakage and no sealing measures can be easily provided. It can be realized.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

In the present embodiment, for example, a second member 2 (opening / closing portion 2) is provided rotatably with respect to a first member 1 (main body portion 1) on the fixed side, and the present invention is applied to this rotating connecting portion. In the first embodiment shown in FIGS. 1 to 8, the second member 2 is used.
The rotating portion 3 that rotates in accordance with the rotation of the first member 1 and the fixed side portion 4 provided on the first member 1 are configured so as to be in contact with or close to each other. And a plurality of engaging projections 6 (at a paired position with a central point as a large line point) provided on the opposing sliding surface of the rotating portion 3. At the same time, the engagement protrusions 6 are respectively moved in the meandering direction according to the meandering of the engagement grooves 5 so that the engagement state between the engagement groove 5 and the engagement protrusions 6 is maintained when the second member 2 rotates. If the rotation speed of the second member 2 with respect to the first member 1 is low, the sliding movement of the engagement protrusion 6 follows, so that the rotation resistance due to the meandering of the engagement groove 5 is small. When the rotation speed is high, the rotation resistance is increased.

That is, in the first embodiment, the engagement projection 6 is configured to rotate along the engagement groove 5 with the rotation of the second member 2. The engaging groove 5 is meandering in the left-right direction with respect to the rotation direction, and each engaging protrusion 6 is configured to be slidable linearly in the left-right direction that is the meandering direction.

More specifically, the engaging groove 5 is configured to draw a smooth sine curve so that the meandering degree is substantially constant and a substantially constant rotational resistance is generated at the same speed. And the second member 2 with respect to the first member 1
Is rotated by a constant load, and when the rotation speed increases, the rotation resistance increases, so that the relative rotation is performed at a substantially constant low speed.

That is, in this embodiment, the rotating second member 2
A rotating sliding surface that rotates and slides with respect to a facing surface of the fixed side portion 4 connected to the first member 1 on the fixed side is formed on the rotating portion 3 that rotates together with the fixed side portion 4. Meandering engagement groove 5
A sliding guide groove 7 is formed on the rotating sliding surface of the rotating portion 3, and the base of the engaging convex portion 6 formed in a piece shape is slidably engaged with the sliding guide groove 7. The engaging projection 6 is engaged with the engaging groove 5.

The engaging groove 5 is configured to meander left and right with respect to the circumferential direction of rotation of the engaging convex portion 6, that is, a smooth curve such as a sine curve meandering left and right with respect to the circumferential direction. The engaging protrusions 6 are slid linearly in the left-right direction, which is the meandering direction with respect to the circumferential direction, that is, in the radial direction (radial direction) of the rotating sliding surface of the rotating unit 3. It is freely configured.

Accordingly, when the engaging projection of the rotating part 3 rotates circumferentially with respect to the engaging groove 5 of the fixed side part 4 with the rotation of the second member 2, the engagement with the engaging groove 5 is maintained. The engaging projections 6 rotate, and the engaging projections 6 are automatically slid in the radial direction along the slide guide grooves 7 while rotating in accordance with the meandering of the engagement grooves 5. Become.

Therefore, if the engaging groove 5 is formed to have a smooth curve and the sliding movement of the engaging convex portion 6 is made smooth, the engaging member 5 can be engaged as long as the second member 2 is slowly rotated. Although the rotation resistance is small because the sliding movement of the engaging protrusion 6 sufficiently follows the meandering of the groove 5, the engaging groove 5 is meandering and engages due to inertia or the like when trying to rotate quickly. The delay in following the sliding movement of the projection 6 causes a large rotation resistance.

Therefore, the rotation resistance can be adjusted by designing the meandering degree, the number of the engagement protrusions 6, the respective sliding movement resistances, or the mass of the engagement protrusions 6, and the desired (automatic adjustment) can be achieved. The rotation speed (or the magnitude of the torque at the time of rotation) can be adjusted.

In this embodiment, the rotating part 3 is rotatable in the case body 8, the fixed side part 4 is assembled in a detented state, and the rotating part 3 is attached to the second member 2. A connecting portion 9 for connecting the connecting portion 9 and a connecting portion 10 for connecting the fixed side portion 4 to the first member 1 are provided as a unit, and a plurality of types of units which can have various governing speeds by the above design are mass-produced. That is, it is configured to be used as a hinge device.

In this embodiment, as described above, the engagement groove 5
By making the meandering into a sine curve shape as in the present embodiment so that the meandering degree is constant over the entire circumference,
It is always a constant turning resistance, and it is possible to adjust the speed so that it always becomes a constant low speed without shifting when rotating automatically, but by changing the meandering degree at design time, it is possible to shift at a predetermined turning position. You can also.

In the present embodiment, the engaging groove 5 is provided on the fixed side portion 4, but the rotating groove 3 may be provided with the engaging groove 5,
Although the engaging projection 6 is slidable along the meandering of the engaging groove 5, the member provided with the engaging groove 5 (the fixed side portion 4) may be configured to be slidable in the meandering direction.

In this embodiment, the rotating part 3 forming the rotating sliding surface facing the fixed side part 4 is provided on the rotating shaft, and the rotating part 3 and the fixed side part 4 are connected to each other. Although the engaging groove 5 and the engaging convex portion 6 are formed, in the second embodiment shown in FIG. 9, the rotating shaft itself is used as the rotating portion 3, and the engaging groove 5 is formed on the peripheral surface. An engaging projection 6 is provided on a bearing 4 for bearing the rotating portion 3 so as to be slidable.

In the second embodiment, the same operation and effect can be obtained, and the engaging projection 6
May be provided so as to be slidable, or the rotating portion 3 provided with the engagement groove 5 may be provided so as to be slidable.

The present invention is not limited to the present embodiment, and the specific configuration of each component can be appropriately designed.

[0038]

As described above, the present invention is constructed as described above. By using a mechanical system that does not use sealed oil, there is no need to worry about an oil leakage seal or a structure to prevent this. It is excellent in mass productivity, and unlike the conventional mechanical type, which simply generates a predetermined rotational resistance by simply pressing against the sliding surface, like the oil damper device, the speed regulation accuracy even in long-term use This is an epoch-making mechanical governing device with excellent durability and excellent durability.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a first embodiment.

FIG. 2 is a schematic sectional view of the first embodiment with a part cut away.

FIG. 3 is an explanatory view showing an engagement groove of the first embodiment.

FIG. 4 is an explanatory view showing an engagement projection of the first embodiment.

FIG. 5 is an explanatory perspective view showing a use state of the first embodiment.

FIG. 6 shows an operation state 1 of the engagement protrusion and the engagement groove according to the first embodiment.
FIG.

FIG. 7 shows an operation state 2 of the engagement convex portion and the engagement groove of the first embodiment.
FIG.

FIG. 8 is an operation state 3 of the engagement convex portion and the engagement groove of the first embodiment.
FIG.

FIG. 9 is an explanatory perspective view of a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First member 2 Second member 3 Rotating part 4 Fixed side part, bearing part 5 Engagement groove 6 Engagement convex part

Claims (3)

[Claims] 1. A mechanical speed controller for automatically adjusting a rotation speed of a second member rotatably provided with respect to a first member, wherein the relative rotation of the second member is controlled by the relative rotation of the second member. A meandering engagement groove is provided on one of a rotating portion that moves and a fixed side portion that is a fixed side with respect to the rotating portion or a bearing portion that supports the rotating portion. An engaging projection is provided for engaging with the mating groove, and the engagement is formed according to the meandering of the engaging groove so that the engagement state between the engaging groove and the engaging projection is maintained during the relative rotation. A mating convex portion or an engaging groove is slidably provided in a meandering direction, and if the rotation speed of the second member with respect to the first member is low, the sliding movement of the engaging convex portion or the engaging groove follows. Therefore, the rotational resistance due to the meandering of the engagement groove is small, and conversely, if the rotational speed is high, the rotational resistance is large. A mechanical governing device characterized in that it is configured to be easy to use. 2. The structure according to claim 2, wherein said engaging groove meanders in a horizontal direction with respect to a rotation direction of said engaging protrusion when said engaging protrusion is relatively rotated with respect to said engaging groove. 2. The mechanical governing device according to claim 1, wherein the engaging protrusion is configured to be slidable relative to the engaging groove in the left-right direction. 3. The engagement groove forms a smooth meandering curve, and when the rotation speed of the second member is relatively increased with respect to the first member under a constant load, the rotation speed is increased. The mechanical governing device according to any one of claims 1 and 2, wherein the relative rotational speed is configured to relatively rotate at a substantially constant low speed by increasing the rotational resistance.