KR960013990B1 - Rotating-piston type rotary damper - Google Patents

Abstract

None.

Description

Rotary Piston Rotary Damper

1 is an exploded perspective view of the rotary damper.

2 is a cross-sectional view of the rotary damper.

3 is a plan view of the rotary damper with the cover open.

4 is a plan view of a rotor having the left half as a cross section.

5 is an enlarged view of the government of the rotor with a through hole installed.

6 is a plan view of the rotor in which the side seal portion and the government seal portion are formed by two-color molding.

7 is a diagram showing the increase and decrease of the volume of the expansion and contraction chamber by the rotation of the rotor.

8 is a perspective view of an embodiment in which a portion of the seal portion is cut off to form a cylinder portion.

* Explanation of symbols for main parts of the drawings

1: rotary damper 2: rotor

3: operating chamber 4: rotor housing

5: spindle 6: cover

7: circular hole 8: trochoid phase difference

10: seal portion 11: through hole

15: bearing 16: fixed external gear

20: working shaft 22: eccentric ring

24: O-ring 25: expansion chamber

The present invention relates to a rotary damper for use in order to smoothly open and close the glove box, for example, and more particularly to a rotary damper capable of generating a high high torque.

Rotating dampers are widely used to smooth the operation of the pusher mechanism and to improve the usability. Conventional rotary dampers are filled with a high viscosity silicone oil or the like between the housing and the disk-shaped rotor, generate shear force in the silicone oil when the rotor rotates, and use this as a source of torque for the damper. It is a structure to get an effect.

However, since the conventional rotary damper is bulky for the generated torque, it is practically difficult to use in a part requiring a large torque and its use is limited.

In addition, the use of high viscosity oil makes assembly work complicated and cumbersome.

Therefore, an object of the present invention is to provide a rotary damper that can obtain a high torque even in a small size and is easy to assemble.

The present invention has been made in view of the above, and is provided with a seal portion in each of the government parts that are approximately a delta shape and the outer circumferential surfaces are bonded at an acute angle, and a circular hole is drilled in the center of the side, and one side of the circular hole. In the center of the other side which has the opening part of which is a fitting hole, the rotor which provided the internal gear in the inner periphery of the other opening part, and the operation chamber which the said rotor was accommodated and one side open | released are opened. A rotor housing having a bearing and a fixed outer tooth gear coaxially with the bearing, one end of which is an operating shaft portion, and a main shaft having an eccentric ring in the middle of the height, and an operating shaft portion of the spindle; The cover is provided with a hole, and the inner tooth is engaged with the fixed outer tooth, and the rotor is brought into contact with the inner surface of the operating chamber in the rotor housing. And the expansion chamber formed by the inner surface of the operating chamber and the outer peripheral surface of the rotor by fitting the eccentric wheel of the main shaft into the fitting hole of the rotor and inserting the main shaft into the circular hole of the rotor to support the lower end with the bearing. ) Fill the viscous liquid in the cylinder and insert the cover with the opening of the rotor housing while inserting the working shaft of the main shaft into the hole.The outer peripheral surface of the rotor interferes with the inner surface of the operating chamber when the rotor rotates inside the operating chamber. The rotor is provided with a shape for increasing the volume of the expansion chamber, and at the same time, the rotor is provided with a tube for distributing the viscous liquid in the expansion chamber in which the volume decreases when the rotor rotates into the adjacent expansion chamber. It features.

That is, in the rotary piston rotary damper of the present invention, when the main shaft is rotated, the eccentric wheel rotates the rotor about the center of the main shaft, and the inner tooth of the rotor is fitted to the fixed outer tooth of the rotor housing. As a result, the rotor rotates while rotating the seal on the inner circumference of the operating chamber.

When the rotor rotates while operating in the operating chamber, the volume of the expansion chamber surrounded by the outer circumferential surface of the rotor and the inner surface of the operating chamber changes, and the viscous liquid in the expansion chamber in which the volume decreases flows into the adjacent expansion chamber through the tube. When the viscous liquid passes through the tube part, the resistance of the rotor becomes the rotational resistance, and further, the main shaft becomes the rotational resistance, whereby the desired damper effect can be exerted.

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

The rotary piston rotary damper 1, as shown in FIG. 1, has a rotor housing having a so-called delta rotor 2 and an operating chamber 3 in which the rotor 20 rotates while rotating inside. 4), the main shaft 5 of the rotor 2, and the lid 6 which covers the open part of the operation chamber 3 of the rotor housing 4, etc. are comprised.

As shown in FIG. 4, the rotor 2 is a short plastic substantially triangular shape in which three outer circumferential surfaces form an inner envelope of the epitroid, and a circular hole 7 is formed at the center of both sides of the triangular shape. ) Is opened through, and one opening portion (the upper half portion of the inner circumferential surface of the circular hole 7 in the drawing) of the circular hole 7 is used as a fitting hole, and the other opening portion (the inner circumferential surface of the circular hole 7 is shown in the drawing). An internal tooth trochoid phase difference 8 is formed in the lower half. In addition, through each hole where the outer peripheral surfaces are joined at an acute angle, a fitting groove 9 is formed over the entire width, a seal portion 10 is installed in each fitting groove 9, and a through hole for connecting adjacent outer peripheral surfaces with each other ( 11) It is drilled as a tube part.

In the present embodiment, the through hole 11 is a hole 12 penetrating from one side to the other side at a position slightly centered from the government of the rotor 2, as shown in FIG. And drill a small diameter hole from the two outer circumferential surfaces joined to the government to the hole 12, respectively, and communicate through the hole 12 on the way from one small diameter hole to the other small diameter hole. The openings on both sides of the hole 12 may be closed with a blocking cover. Therefore, the through-hole 11 laid in this form has one opening 11a open near the top of one outer peripheral surface, and the other opening 11b opens near the top of the adjacent outer peripheral surface.

In another embodiment, as shown in FIG. 6, the seal 10 is provided in the fitting groove 9 described above, and the side seal 13 is connected to the outer edge of the side of the rotor 2. It is integrally molded by a so-called two-color molding method with a PU elastomer resin or the like. Therefore, the seal portion 10 protrudes over the entire width of the rotor 2, and the side seal portion 13 slightly protrudes from the side surface in connection with the outer edge thereof.

The hole 14 shown in FIG. 4 is a hole for firmly supporting and mounting two-color molded elastomer resin on the rotor body.

The rotor housing 4 is made of a plastic hat and has an inner contour with a two-section epitroid curve, with one side (top) at the center of the operating chamber 3 with the open side closed at the other side. The bearing 15 is formed, and the fixed outer toothed tooth 16 is formed integrally with the bearing 15 coaxially, and the flange portion 17 is provided with a hole 18 for supporting the cover 6. At the same time, the main body fixing groove 19 is formed.

In FIG. 1, the main shaft 5 is made to be the working shaft portion 20 by striking one end of the opposite side shown as the upper end, and an end flange 21 is formed below the working shaft portion 20. At the same time, the eccentric ring 22 is integrally formed below the flange 21, and the lower end is formed in the form of a protrusion. Moreover, the flange 21 is set in the shape and size which cover the opening part of the operation chamber 3 of the rotor housing 4, and fits the O-ring 24 to the edge part 23. As shown in FIG. In addition, as shown in FIG. 2, the operation shaft part 20 may be separately formed and connected.

While assembling the rotary damper 1 made of the above-described components, as shown in FIGS. 1 and 2, the trochoid phase difference 8 of the rotor 2 is engaged with the fixed external tooth difference 16 to seal each seal 10. ) Is placed in the operating chamber 3 of the rotor housing 4 with the inner surface of the operating chamber 3 in contact with the inner surface of the operating chamber 3 and formed by the inner surface of the operating chamber 3 and the outer peripheral surface of the rotor 2. A viscous liquid is filled in the expansion chamber 25 of a substantially crescent type cross section.

In addition, the viscous liquid uses a silicone oil or the like as in the conventional rotary damper, but in the case of the rotary damper, a high torque can be obtained without having a very high viscosity, so that the viscous liquid can be used even with a low viscosity oil.

Then, the eccentric ring 22 of the main shaft 5 is fitted into the fitting hole of the rotor 2 while filling the viscous liquid, and the flange 21 is supported by the bearing 15 to support the lower end of the projection 3. The opening of the operating chamber 3 is closed by fitting to the internal combustion of the opening, and the lid 6 is put on the rotor housing 4 with the operating shaft 20 of the main shaft 5 inserted into the hole 26. The support mounting hole 27 of the lid 6 and the support mounting hole 18 formed in the flange portion 17 of the rotor housing 4 communicate with each other, and a screw is firmly inserted into the support mounting hole. Tighten.

When the rotary damper 1 is assembled in this manner, the viscous liquid filled inside by the seal portion of the O-ring 24 does not leak to the outside even when the rotor 2 and the main shaft 5 rotate.

Next, the operation of the rotary damper 1 having the above-described configuration will be described.

For example, when a rotational force is applied from the outside through a gear (not shown) mounted on the operating shaft 20 and the main shaft 5 rotates, the eccentric wheel 22 is centered on the center of the main shaft 5 to the rotor 2. Gives rotational force to The rotor 2, which is given rotational force, rotates about the center of the main shaft 5, but because the trocoid phase difference 8 is engaged with the fixed external tooth difference 16 of the rotor housing 40, The rotating force is generated so that the rotor 2 starts to rotate in the operating chamber 3 while sliding each seal portion 10 to the inner circumferential surface of the operating chamber 3.

When the rotor 2 rotates while rotating in the operating chamber 3 in this manner, the volume of the expansion and contraction chamber 25 formed by the operating surface of the rotor 2 and the inner surface of the operating chamber 3 is reduced by the rotor ( 2) changes with rotation.

For example, as illustrated in FIG. 7, the portion surrounded by the outer circumferential surface between the government A and the government B of the rotor 2 and the inner circumferential surface of the operating chamber 3 is similarly expanded to the expansion and contraction chamber 25AB. The part surrounded by the outer circumferential surface between the government (B) and the government (C) of the rotor (2) and the inner circumference of the operating chamber (3) is constructed in a new chamber (25BC), the government (C) and the government of the rotor (2). When the portion surrounded by the outer circumferential surface between (A) and the inner circumferential surface of the operation chamber 3 is the expansion chamber 25AC, the volume of the expansion chamber 25AC gradually increases in the state shown in FIG. The volume of the expansion chamber 25AB gradually decreases, and the volume of the expansion chamber 25AB increases to the maximum. As the volume of the expansion and contraction chamber 25 increases, the internal pressure gradually decreases. On the contrary, when the volume decreases, the internal pressure increases.

Therefore, the viscous liquid in the expansion chamber 25AB flows into the expansion chamber 25AC through the through hole 11A of the government A and at the same time the expansion chamber 25BC through the through hole 11B of the government B. Flows in. When the viscous liquid flows into the adjacent expansion and contraction chamber 25 through the through hole 11, resistance is generated in the passage of the through hole 11, and this resistance force acts as a rotational resistance of the rotor 2. Therefore, the rotational resistance of this rotor 2 becomes the rotational resistance of the main shaft 5, and exhibits a damper effect.

In addition, when the rotor 2 rotates and the volume of the expansion chamber 25AB becomes the minimum as shown in FIG. 7C, the viscous liquid in the expansion chamber 25AB becomes the expansion chamber 25AC, The flow into (25BC) stops, but on one side the volume of the expansion chamber 25AC continues to increase, and the volume of the expansion chamber 25BC begins to decrease. Therefore, the viscous liquid in the expansion chamber (25BC) at this time flows into the expansion chamber (25AC) through the through hole (11C) of the government (C), the flow resistance at this time acts as a rotational resistance of the main shaft (5) damper effect Will be used.

Then, the rotor 2 rotates again, and as shown in FIG. 7D, the movement of the viscous liquid into the expansion chamber 25AC is stopped when the volume of the expansion chamber 25AC is maximized. However, the volume of the expansion chamber 25AB gradually increases, and the volume of the expansion chamber 25AC decreases. Therefore, the viscous liquid in the expansion chamber 25BC flows into the expansion chamber 25AB through the through hole 11B of the government B, and the flow resistance at this time acts as a rotational resistance of the main shaft 5 to effect the damper. Will be exercised.

In addition, when the rotor 2 rotates, the volume of the expansion chamber 25AC begins to decrease, the volume of the expansion chamber 25AB gradually decreases, and the volume of the expansion chamber 25AB increases, and the expansion chamber ( Volume of 25BC) decreases. Therefore, the viscous liquid continuously flows from the expansion and contraction chamber 25 in which the volume decreases to the adjacent expansion and contraction chamber 25 in which the volume increases, whereby the damper effect is continuously exerted.

As such, when the rotor 2 rotates and rotates in the operating chamber 3, the volume of the expansion and contraction chamber 25 surrounded by the outer circumferential surface of the rotor 2 and the inner surface of the operating chamber 3 decreases and the volume of this volume decreases. During the sensitization, the viscous liquid in the expansion and contraction chamber 25 in which the volume decreases moves through the through hole 11 in the adjacent expansion and contraction chamber 25, and at this time, the flow resistance of the viscous liquid is the rotor 2, namely, the main shaft ( It becomes rotation resistance of 5) and continues to exert damper effect.

In the present embodiment, the ratio (i) = i = 2: 3 of the trochoid phase difference 8 of the rotor 2 and the fixed external tooth difference 16 of the rotor housing 4 is set to the rotor 2. Is rotated three times.

In the present embodiment, the through-holes 11 are formed inside the rotor 2 to communicate the expansion and contraction chambers 25 adjacent to each other, and at the same time, the flow resistance of the viscous liquid passing through the through-holes 11 to the rotors. Although the damper effect is exhibited by using the rotational resistance of (2), the cylinder part of the present invention is not limited to forming the through hole 11 in the rotor 2. As described above, if the small grooves 28a and 28b are formed in the middle to the end of the seal portion 10 provided at the top of the rotor 2, the manufacture of the small light through hole 11 in the rotor 2 is compared with that of the case where the small light through-hole 11 is laid. It is easy.

However, if a well-known one-way clutch (not shown) is connected to the working shaft 20 and connected to the outside via this clutch, the damper effect can be obtained only in one-way rotation.

In addition, the shape of the outer circumferential surface of the rotor 2 and the inner contour of the operating chamber 3 set the inner contour of the operating chamber 3 to epitroid and the rotor 2 to its inner contour in the above-described embodiment. However, the shape of the rotor 2 may be epitaxial and the shape of the operating chamber 3 may be a shape which draws the outer outline.

In other words, the inner contour of the operating chamber 3 has a shape in which the seal portion 10 slides when the rotor 2 rotates, and the shape of the outer circumferential surface of the rotor 2 is characterized in that the rotor 2 has an operating chamber ( 3) It is good to set it to the shape which increases / decreases the volume of the expansion and contraction chamber 25, without interfering with the inner surface of the operation chamber 3, when rotating and rotating inside. Similarly, the procoid may be a peritrocoid, a hypertrocoid, or the like in addition to the epitrocode. As described above, according to the present invention, since the viscous liquid in the expansion chamber whose volume decreases due to the rotation of the rotor flows into the neighboring expansion chamber, the damping function is exerted as the resistance torque of the main shaft. It is possible to provide a rotary damper that generates a large torque.

In addition, the rotary damper according to the present invention can use a viscous liquid with a low viscosity because it can generate a large torque even if the viscosity of the viscous liquid is low. Therefore, assembling work is easy compared with the conventional rotary damper, which had to be filled with a high viscosity viscous liquid.

Claims (6)

Seals are provided in each of the governments, each of which is approximately a delta shape and the outer circumferential surfaces are joined at an acute angle, a circular hole is provided at the center of the side surface, and one opening of the circular hole is a fitting hole and is placed in the inner circumference of the other opening. A rotor with gears; A rotor housing which accommodates the rotor, has a working chamber with one side open, a bearing in the center of the other side closed and a fixed outer tooth coaxially with the bearing; A main shaft having one end as an operating shaft and having an eccentric ring in the middle of the height thereof; And a cover in which a hole penetrating the operating shaft of the main shaft is provided, and the inner tooth is engaged with the fixed outer tooth, and the rotor is stored in the operating chamber of the rotor housing while the seal is in contact with the inner surface of the operating chamber. The eccentric wheel is fitted into the fitting hole of the rotor, and the main shaft is inserted into the circular hole of the rotor to support the lower end with the bearing, and the viscous liquid is filled into the expansion chamber formed by the inner surface of the operating chamber and the outer peripheral surface of the rotor. The cover is covered with the opening of the rotor housing while the operating shaft of the main shaft is inserted into the hole, and the support is mounted. The inner contour of the operating chamber is set to a shape in which the seal portion slides when the rotor is rotated. The outer circumference is designed to increase or decrease the volume of the expansion chamber without interfering with the inner surface of the operating chamber when the rotor rotates inside the operating chamber. Ahwooreo tenderness and the rotor is that the rotor, when rotating, characterized in that a tube for circulating a viscous liquid of the new interior volume that is reduced by the indoor expansion neighboring row planetary piston rotary damper. The rotary piston type rotation according to claim 1, wherein a tubular portion is formed by laying a through hole in the rotor and opening one opening of the through hole to one outer circumferential surface and opening the other opening to the other outer circumferential surface. Damper. The rotary piston type damper according to claim 1, wherein a portion of the seal of the rotor is cut off to form a cylinder. The rotary piston type according to any one of claims 1 to 3, wherein the contours of the three outer circumferential surfaces of the rotor form an inner contour of the epitrocode, and the inner contour of the operating chamber of the rotor housing draws an epitrooid curve. Rotary damper. The rotary piston type according to any one of claims 1 to 3, wherein the contours of the three outer circumferential surfaces of the rotor form an epitrooid, and the inner contours of the operating chamber of the rotor housing draw the outer contours of the epitrooid curve. Rotary damper. The outline of the three outer circumferential surfaces is a short, roughly triangular shape that draws the inner contour of the epitrooid, and the seals are installed in each government where the outer circumferential surfaces are bonded at an acute angle. One opening is opened on one outer circumferential surface, the other opening is opened on the other outer circumferential surface, a circular hole is opened in the center of the side surface, and one opening portion of the circular hole is a fitting hole, and the other opening is opened. A rotor having a trocoid phase internal tooth difference formed on an inner circumference of the portion; A rotor housing having a two-section epitroid curve with an inner profile, an operating chamber with one side open, and a bearing in the center of the other side closed to install a fixed outer tooth coaxially with the bearing; A main shaft having one end as an automatic shaft portion and having an eccentric ring in the middle of the height thereof; And a cover having an opening opening through the operating shaft of the main shaft, and the rotor is fitted into the operating chamber of the rotor housing while the seal is in contact with the inner surface of the operating chamber by fitting the trochoidal internal tooth gear to the fixed external tooth gear. And fitting the eccentric wheel of the main shaft into the fitting hole of the rotor, inserting the main shaft into the circular hole of the rotor, supporting the lower end with the bearing, and the viscous liquid in the expansion chamber formed by the inner surface of the operating chamber and the outer peripheral surface of the rotor. It is filled, and the cover is placed on the opening of the rotor housing while the working shaft of the main shaft is inserted into the hole. The viscous liquid in the expansion chamber in which the volume decreases as the rotor rotates is disposed through the through hole of the rotor. Piston-type rotary damper of the rotor, characterized in that to flow into the expansion chamber of the.