JPH03144127A - Unidirectional constant-angle damper - Google Patents

Abstract

PURPOSE:To moderate impact in braking by fitting an inner frame in a hollow chamber formed in an outer frame, by providing a key regulating body for exposing an inner tooth formed on the inner surface of this inner frame inward, and by providing a resistance giving means for giving a pressing load against rotation of the inner frame between both the inner and the outer frames. CONSTITUTION:When a key pin 8 of an axis holder 10 is on a slope 6' immediately before an opening 6 against a key regulating body 7 fixed to an outer frame 2, a spiral tooth 23 of the pin 8 is brought into contact with the inner surface of a fitting part 4 of the key regulating body 7. Thus, an input axis 1 is freely rotated till this position, and when rotation of the input axis 1 is advanced and the pin 8 exceeds the slope 6', the pin 8 is projected outward from the opening 6 by a force of a spring 13 to be engaged with an inner tooth 5 of an inner frame 3. As a result, even though rotation of the input axis 1 is transmitted to the inner frame 3 to rotate it, rotation speed of the inner frame 3 is extremely reduced by a resistance giving means consisting of a friction resistance part 11A and a viscous filler 11B. In this way, the inner frame 3 is rotated at a relaxed speed, and when the pin 8 is brought into contact with the other end 6'' of the opening 6, the input axis side is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a unidirectional constant angle damper that is used in a rotating part and reduces its rotational speed in a predetermined region.

(Prior art) For example, with lids that open vertically and are rotatably mounted around a horizontal axis, when you release your hand from the open lid, the lid closes rapidly as if falling under the weight of the load, causing a large shock.
There was a risk that related components would be damaged. Conventional dampers used in such cases support the lid with an arm and provide a cylinder on the arm to provide sliding resistance.

(Technical Issues) These conventional dampers require a considerable amount of space for installation, are conspicuous and obstructive, and are troublesome to install, depending on whether they are suitable or not. However, no product has yet been proposed that can solve the above-mentioned problems and can be widely used in lids and other various products.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to be able to apply a brake to rotation in one direction around a certain axis within a predetermined range, thereby alleviating impact, and to prevent rotation in the opposite direction. The object of the present invention is to provide a unidirectional constant angle damper that does not provide any resistance and can be used for any purpose.

(Technical Means) The object is to provide an outer frame 2 having a hollow chamber 1 with a circular cross section, and a substantially cylindrical inner frame 3 fitted into the hollow chamber 1 and rotatably provided with respect to the outer frame 2. The opening 6, which is fixed to the outer frame 2 and has a portion 4 to be fitted into the inner frame 3, and which is to expose inward one-way internal teeth 5 formed on the inner surface of the inner frame, is inserted into the inner frame 3. A key regulating body 7 formed in the portion 4 is rotatably inserted into the key regulating body, and internal teeth 5 are provided on the outer peripheral surface within the range of the opening 6.
A shaft holder 10 is provided with at least one key pin 8 biased outwardly so as to be able to engage with the shaft holder 10 and a shaft mounting means 9 is provided at the center. This can be achieved by a configuration including a resistance imparting means 11 provided between the inner and outer frames so as to engage with the teeth 5 and apply a load to the rotation when the inner frame 3 rotates in the circumferential direction.

(Example) A description will be given below with reference to the drawings. The outer frame 2 has a hollow chamber 1 which is biased in one example, and the other side has a base part 17 having a mounting hole 16.
The hollow chamber l has a cylindrical shape, one of which is open in the axial direction, the other is closed, and a shaft 18 is provided that projects from the center of the wall surface in the opening direction * 1
8a indicates a groove provided in the longitudinal direction of the outer surface of the coaxial shaft 18.

The inner frame 3 has a substantially cylindrical shape that is large enough to be rotatably housed in the housing chamber 1, and a cylinder shaft 19 that projects axially outward from a closed wall surface on the same side as the outer frame 2 is connected to the shaft 18. is fitted and supported. Sawtooth-shaped one-way internal teeth 5 are formed on the inner surface of the inner frame 3 along the circumferential direction, and in the illustrated case, it has a structure that engages with a mating member when rotating to the left, but does not engage when rotating to the right.

The key regulating body 7 is a generally cylindrical portion 4 that is fitted into the inner frame 3.
and a flange-like portion 22 located on the opening side of the outer frame 2, in which the same number of convex portions 21 are formed outward in the radial direction and engage with a plurality of concave portions 20 formed on the mouth edge of the outer frame 2. ing. Inner frame 3
The fitting portion 4 has an opening 6 formed over a certain range in the circumferential direction around the axis, and engagement with the internal teeth 5 from within the regulating body is possible within this range.

The shaft holder 10 has an outer diameter that is rotatably fitted into the fitting portion 4 of the key regulating body 7, and two recesses 12 are formed on the outer peripheral surface of the shaft holder 10 at positions approximately half a circumference apart. A plate-shaped spring means 13 that urges the key pin 8 radially outward, which has helical teeth 23 that can be engaged with the internal teeth 5 in one direction.
It is stored so that it can be seen along with it. On the opposite side of the key pin 8, an auxiliary pin 38 is assembled with the same structure as the key pin 8, but its tip 39 is rounded and engages and disengages with a recess 40 on the inner surface of the insertion portion for positioning. The shaft holder 10 is also a member for directly or indirectly attaching the rotary input shaft (I) such as a lid described in the section of the prior art, and as a means 9 for this purpose, a recessed hole at the center of the shaft is provided on the outer frame opening side. There is a means 9
The form of can be set freely.

The resistance imparting means 11 is interposed between the inner frame 3 on the input shaft side and the outer frame 2 on the lid etc. side, and the portion 11 due to frictional resistance
A and a high viscosity filler 11B.

The former is incorporated into the inner frame 3 using the outer part of the cylindrical shaft 19, and has parts 24a, 24b, 25a, 25b that engage with the cylindrical shaft 19 by means of engagement means 19a, 19b. At least two rotary plates 24 and 25 rotate integrally with the rotating plate 3, and an annular elastic body 14 having waveform deformation arranged on both plate surfaces.
, engages with the concave strip 20' provided at the back of the concave portion 2o of the outer frame 2 and integrates with the outer frame 2, and the rotary plate 2
Two fixed plates 26 and 27 arranged to sandwich 4.25,
Each member 24, 25, 26 includes an adjustment ring 28 which is screwed into the external thread 19c of the cylinder shaft 19 through a female thread 28a formed inside the ring and adjusts the degree of deformation of the annular elastic body 14.
．． 27 is pressed against the inner frame end surface 3a and the ring 28 by the elastic body 14. 29 is a protrusion provided on the outer edge of the fixed plate 26.27, 30 is a radial unevenness formed on the plate surface of the rotating plate 24.25 and the adjustment ring 28, and 31 is formed on the plate surface of the fixed plate 26.27. This shows the unevenness in the circumferential direction.

The high viscosity filler 11B is filled in the space between the inner frame 3 and the outer frame 2, and the unevenness 30, 31 and the unevenness 3 on the outer periphery of the inner frame are
A viscous substance called torque grease can be used because it acts on the 2nd grade to create resistance.

33 is a member like an O-ring for the seal, 3
4 caps, and a protrusion 34 that fits into the circumferential groove 35 of the outer frame opening.
It has a bearing hole 37 in the center which is fixed to the outer frame 2 via a and which rotatably supports the end 36 of the shaft holder 10.

Note that although the illustrated opening 6 is approximately 1/4 of the entire circumference, this range can be set arbitrarily. Further, the elastic body 14 is not limited to a corrugated plate shape, but a coil shape can also be used. Material of each part,
The strength is selected depending on the purpose and use, but it is suitable for resin molding.

(Operation) The operation of the present invention configured as described above will be explained together with the operation of the constant angle damper. First, as shown in FIG. 4, the key pin 8 of the shaft holder 10, which rotates in one direction by the input shaft I, is inserted into the opening 6 with respect to the cam regulating body 7, which is fixed to the outer frame 2.
When the pin 8 is on the slope 6' immediately in front of the pin 8, the helical teeth 23 of the pin 8 are in contact with the inner surface of the fitting part 4 of the regulating body while being pushed by the spring means 13, so the input shaft ■ does not move up to this position. It rotates freely with just the torque of turning the shaft holder IO.

Note that the shaft holder 10 in FIG. 4 is in a fixed position with the auxiliary bottle 38 locked in the recess 4o.

The input shaft I rotates as shown in FIG.
When the bottle 8 passes the slope 6' of the opening 6, the bottle 8 is moved by the spring means 1.
3, it projects outward from the opening 6 and engages with the internal teeth 5 of the inner frame 3. As a result, the rotation of the human power shaft (■) is transmitted to the inner frame 3 and attempts to turn it in one direction, but since the inner frame 3 is subject to frictional resistance and viscous resistance from the resistance imparting means, the inner frame 3, that is, the input shaft side and the outer frame 2 and the relative rotational speed decreases significantly. However, although a resistive load is applied, the relative rotation does not stop, so rotation continues at a moderate speed. In the illustrated example, when the cam bin 8 comes into contact with the other end 6'' of the opening 6, the input shaft side is stopped (FIG. 6).

Therefore, in the illustrated case, the key pin 8 is connected to the slope 6' of the opening 6.
The input shaft I is provided with frictional resistance due to the elastic body I4 and viscous resistance due to the high viscosity filler 15 in the angular range from 6'' to the other end 6''.
By setting the closing position of the lid within this range, for example, the lid can be closed without causing unnecessary shock to the lid and its related components. Note that in the opposite direction to the above direction, the key pin 8 does not engage with the inner frame 3 and can freely rotate.

(Effect) Therefore, according to the present invention, since it is possible to brake rotation in one direction around a certain axis within a predetermined angular range, there is no need to apply unnecessary shock, and there is no resistance to rotation in the opposite direction. It is possible to perform damping without impairing operability because it does not give any However, since the rotating member can be attached to the shaft that supports it, it does not get in the way, and it can be used for a wide variety of things regardless of the object to which it is attached.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a cross-sectional view, Fig. 3 is a longitudinal sectional view, and Figs. 4 to 6 are explanatory diagrams of the operating state. It is. 1...Hollow chamber, 2...Outer frame, 3...Inner frame, 4...
- Fitting cylinder part, 5... Internal teeth, 6... Opening, 7... Key regulating body, 8... Key pin, 9... Shaft mounting means, I
O...Shaft holder, 11...Resistance imparting means.

Claims (1)

[Claims] (1) An outer frame 2 having a hollow chamber 1 with a circular cross section, and a hollow chamber 1
It has a substantially cylindrical inner frame 3 which is fitted into the outer frame 2 and is rotatable with respect to the outer frame 2, and a part 4 which is fixed to the outer frame 2 and fitted into the inner frame 3. The insertion portion 4 has an opening 6 formed on the inner surface of the frame in which the one-way internal teeth 5 are to be exposed inward.
a key regulating body 7 formed in the key regulating body 7; and at least one key regulating body rotatably inserted into the key regulating body and biased outwardly so as to be able to engage with the internal teeth 5 in the range of the opening 6 on the outer peripheral surface. A shaft holder 10 is provided with a key pin 8 and a shaft mounting means 9 is prepared in the center, and the shaft holder 10 is rotated in one direction, and the key pin 8 is
engages with the inner teeth 5 and when the inner frame 3 rotates in the circumferential direction,
A unidirectional constant angle damper comprising a resistance applying means 11 provided between the inner and outer frames to serve as the rotational load. (2) The shaft holder 10 has one or more recesses 12 on the outer peripheral surface, and the recesses 12
spring means 13 biasing the key pin 8 radially outward;
2. The unidirectional constant angle damper according to claim 1, wherein said unidirectional constant angle damper has a structure in which said damper is housed in said damper. (3) The resistance imparting means 11 includes an elastic body 14 that presses the inner frame 3 in the axial direction of the outer frame 2, and a highly viscous filler 15 filled between the inner and outer frames. One-way constant angle damper.