TW577963B - Damper - Google Patents

Abstract

Provided is a damper, wherein a means for applying brake force to urging members is set within a means for applying brake force to viscous fluid so as to make the size of product smaller. The damper D comprises a housing 11, a rotor 31, a cam body 41, a coil spring 51 and a viscous fluid 71. The housing 11 is provided with a cylindrical receiving recess 14 of which the center of bottom has a cam portion 15 protruding in the axial direction of receiving recess 14. The tip part of the cam portion 15 has two cam surfaces 15a extending peripherally. The rotor 31 is rotatably received in the receiving recess 14. The cam body 41 being rotatable at a predetermined angle in relation to the rotor 31 and having two cam surfaces 42a slidably contacting with two cams 15 is axially movable in relation to the rotor 31. The coil 51 is installed between and the rotor 31 to push the cam body 41 to contact the cam portion 15. The viscous fluid 71 is filled in the receiving recess 14.

Description

577963 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a damper for braking the rotation of a rotating body. [Prior art] The above-mentioned conventional damper is disclosed in, for example, Japanese Patent Publication No. 6-6 59, which increases the braking force by adding the viscous resistance of a viscous liquid and the resistance of a compression coil spring. Of the building. [Summary of the Invention] Problems to be Solved by the Invention The above-mentioned conventional damper is made of a viscous liquid braking force imparting mechanism that imparts braking force by viscous resistance of viscous fluid, and a spring member that imparts resistance by compressing a coil spring. Since the power-giving mechanism is constructed separately, it has the disadvantage of being large. In order to solve the above-mentioned problems, the present invention is to provide a damper capable of miniaturization by installing a braking force imparting mechanism of an elastic member in a viscous liquid braking force imparting mechanism. The damper of the present invention includes: a housing provided with a cylindrical receiving recess, a central portion of the bottom of the receiving recess is provided with a cam portion, and projects toward the axial direction of the receiving recess, and the front end portion has a cam surface in the circumferential direction; a rotating body, The cam body is rotatably received in the receiving recess; the cam body can move axially relative to the rotary body and cannot rotate relative to the rotary body, and has a cam surface in the circumferential direction, which is slidably connected to the cam surface of the housing; an elastic member Is installed between the cam body and the rotating body, so that the cam body is crimped to the cam portion; and a viscous liquid is filled in the receiving recess.

314154.ptd Page 8 577963 V. Description of the invention (2) Furthermore, it is better to make the cam body rotate a predetermined angle with the rotating body, and it is better to install two or more cam surfaces on the cam part and the cam body. [Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a damper according to an embodiment of the present invention, FIG. 2 is a right-side sectional side view of each component shown in FIG. 1, and FIG. 3 is a cam portion and a cam portion shown in FIGS. 1 and 2. Explanatory explanatory view of the cam surface of the cam body. FIG. 4 is a sectional view of the damper in which the components shown in FIG. 1 are assembled, and FIG. 5 is a sectional view corresponding to the line XX in FIG. 4. In FIG. 1 or FIG. 2, the damper D is provided with a housing 11 having a cylindrical receiving recess 14, a rotating body 31 being received in the receiving recess 14 of the housing 11, and a cam body 4 1. Can be moved axially relative to the rotating body 31, and at the same time can be rotated relative to the rotating body 31 by a predetermined angle; the coil spring 51 is used as a spring member so that the cam body 41 is directed toward the cam portion of the housing 11 1 5 spring compression method; viscous liquid (6 1: refer to Figure 4), viscous liquid such as lubricating oil, silicone oil, etc. filled in the receiving recess 14 of the housing 1 1; and 0-ring 7 1, when As a sealing member, a seal is formed between the casing 11 and the rotating body 31 so that the viscous liquid (61) does not leak from the casing 11. The casing 11 includes: a casing body 12 made of synthetic resin; and a circular upper cover 2 1 made of synthetic resin in plan view for closing an opening provided at one end of the casing body 12. The housing body 12 includes a cylindrical portion 13 with one end open in the axial direction, and a mounting portion 19 integrally mounted on the outer periphery of the cylindrical portion 13. The cylindrical portion 13 is provided with a cylindrical receiving recess 14, and the receiving recess 14 has a bottom

314154.ptd Page 9 577963 V. Description of the invention (3) The central portion (center) is provided with a cam portion 15 having a circular shape in plan view. The cam portion 15 has two cam surfaces 1 5 a (refer to Section 3). (Picture), protruding axially toward the receiving recess 14, the front end portion is separated by 180 degrees in the circumferential direction and is undulating. At the same time, a cylindrical support shaft 16 is installed. The diameter of the cam portion 15 protruding a predetermined length in the axial direction is small. In addition, the cylindrical portion 13 is provided with an annular segment portion 17 on the inside of the opening end for receiving the outer cover 21, and the fastening portion 2 of the outer cover 21 1 is provided with a fastening hole 1 8 provided on the opening side 1 8 Axisymmetric position at 0 degrees. The plate-shaped mounting portion 19 is provided with a mounting hole 20. The outer cover 21 is provided with an engaging portion 2 2 for engaging with the retaining hole 18 at an axially symmetrical position of 180 degrees on the outer periphery, and a circular hole through which a part of the rotating body 31 passes is provided in the center. twenty three. The rotating body 3 1 formed of the synthetic resin includes: a large-diameter portion 3 2; a middle-diameter portion 36 that is concentrically provided at the front end of the large-diameter portion 3 2 and passes through a hole 2 3 of the outer cover 2 1; and The small-diameter portion 37 is arranged concentrically at the front end of the middle-diameter portion 36 and passes through the hole 23 of the outer cover 21. The large-diameter portion 32 is provided with a cylindrical accommodating recess 33, which faces from the bottom opposite to the bottom of the accommodating recess 14 of the housing body 12 (the front end on the opposite side of the middle-diameter portion 36) toward the middle-diameter portion 3 6 On the side, a receiving groove 34 is provided at an axially symmetrical position of 180 degrees of the receiving recess 33. The receiving groove 3 6 is extended from the bottom toward the axial direction by a predetermined length, and a plurality of through holes 3 5 are provided at the same time. The housing recess 33 is communicated with the outside and serves as a function of storing air. The small-diameter portion 37 is provided with two flat surfaces 38, and faces from the front end (the side opposite to the side of the middle-diameter portion 36) toward the side of the middle-diameter portion 36 to form an I-shaped cut.

314154.ptd Page 10 577963 V. Description of the invention (4) The cam body 41 made of the above synthetic resin is provided with; the large-diameter portion 4 2 ′ is approximately the same service as the cam portion 15 of the housing 11 and The bottom (cam part 1 5 side) is provided with two cam surfaces 4 2 a (refer to FIG. 3), separated by 180 degrees toward the circumferential direction, and correspondingly undulating with the cam surface 1 5 a; the protrusion 4 3 'Axially symmetric at 180 degrees connected to the outer periphery of the large diameter portion' extends axially 'and its width is narrower than the width of the receiving groove 34 of the rotating body 31; and the small toes 44' are concentric Connected at the front end of the large-diameter portion 42. The large-diameter portion 4 2 and the small-diameter portion 4 4 are provided at their centers with through-holes 4 5 ′, and the supporting shafts 16 of the external body 12 are rotatably penetrated. Therefore, since the width of the protrusion 41 is narrower than the width of the receiving groove 34, the protrusion 41 can move in the axial direction with respect to the rotating body 31, and can rotate a predetermined angle with respect to the rotating body 31. Next, an example of a method of assembling the damper D will be described. First, the middle-diameter portion 36 is inserted into the small-diameter portion 37 of the rotating body 31 through the O-ring 71 'and the hole 2 3 of the outer cover 21 is simultaneously inserted, so that the 0-ring 71 is abutted on the middle-diameter portion. 3 6 The large-diameter portion 3 2 on the outside, and the outer cover 21 is brought into contact with the large-diameter portion 3 2 through the 0-ring 7 1, and the O-ring 7 丨 and the outer cover 2 丨 are mounted on the rotating body 3 Next, a predetermined amount of the viscous liquid 61 is poured into the receiving recess 14 of the housing body 12, and then the through-hole 45 is penetrated through the support shaft 6, and the cam body 41 is inserted into the receiving recess 14. Then, the coil spring 51 is inserted into the accommodating recessed portion 14 so that one end (lower) side thereof abuts against the large-diameter portion 42 of the small-diameter portion 4 4 of the cam body 41. As described above, the other end (upper) side of the coil spring 5 1 is accommodated in the receiving recess 3 3 of the rotating body 3 1 to which the O-ring 7 1 and the outer cover 21 are installed, and the large

314154.ptd Page 11 577963 V. Description of the invention (5) The diameter portion 32 is inserted into the receiving recess 14. When the large-diameter portion 32 is inserted into the receiving recess 14 in this way, it is inserted in a manner corresponding to the protrusion 4 3 corresponding to each receiving groove 34, so that the protrusion 43 of the cam body 41 can be inserted (received in). Containment trench 34. Then, after the fastening portion 2 2 of the outer cover 21 corresponds to the fastening hole 18 of the housing body 12, the outer cover 21 is stacked toward the housing body 12 side, and each fastening portion 2 2 is buckled. It can be assembled as shown in Figure 4 by matching the way with the corresponding buckle holes 18. When assembled in this manner, the air in the receiving recess 33 of the rotating body 31 is discharged through the through hole 35, and the air that has not been exhausted remains in the receiving recess 33 or the through hole 35. The thus-assembled damper D is sealed between the outer cover 21 and the rotating body 31 by the 0-ring 71, and the seal between the housing body 12 and the rotating body 31 is formed by fitting. However, the viscous liquid 61 may leak from between the housing body 12 and the rotating body 31. If the liquid body 1 is to be more completely sealed, the housing body 12 and the outer cover 2 1 may be heat-sealed or sealed. A 0-ring seal is arranged between the housing body 12 and the outer cover 21. Next, the operation will be described. It is explained that the damper D is used to brake the opening and closing of the door lintel, and the door lintel is turned from the closed state to the open state by rotating from the vertical state to the horizontal state. Then, in the closed state of the lintel, the coil spring 51 is brought into a state of maximum extension, and the two cam surfaces 15a and 42a are brought into full contact with each other.

314154.ptd Page 12 577963 V. Description of the invention (6) First, the closed state of the lintel when it is locked is released, and then when the lintel is turned, there will be a gap (gap) between the side wall of the receiving groove 34 and the protrusion 43. The door lintel is not braked, but rotates while accelerating by its own weight, so that the protrusion 4 3 is abutted to the side wall of the receiving groove 34. Then, when the protrusion 43 abuts against the side wall of the receiving groove 34, the lintel, the body 3 1 ^ 3 1 and the cam body 4 1 all start to rotate, so a viscous liquid 6 1 between the housing body 12 and the rotation occurs. Viscous resistance. And rotates by the cam body 41 along the cam surface 42a along the cam surface 51a of the cam surface 51a and * compresses the helical spring yellow 5 1 '. Therefore, the compression coil spring opening force is generated. By its own weight, while accelerating, it is opened while being braked as described above. Slowly open the bumps. According to one embodiment of the present invention, because the cam portion is accommodated in the rotation, Zhao 41, Spiral Elite 51 (made of elastic members) The power-giving mechanism) is closed in Zhao 31, and the damper D can be miniaturized. The cam body 41 can be rotated by a predetermined angle with respect to the rotating body 31. Therefore, the light η β is opened and the brake is accelerated after the opening speed is accelerated. Therefore, self-jealousy can be turned on even by the self-weight. 42 technology, so that the cam portion 15 and the cam body 41 are provided with two cam surfaces 1 5 a, and the force_outside cam body 41 does not tilt the cam portion 15, that is, because no additional knowledge is required . Shili can make the cam body 41 turn, so the braking torque can be the same as above. In the form of the turtle, it is explained that the coil spring 5 1 can be used as the elastic member for other elastic members that can perform the same function, such as plate jing. .

577963 V. Description of the invention (7) The above description is an example of enabling the cam body 41 to rotate a predetermined angle with respect to the rotating body 31, but it is also possible to prevent the cam body 41 from rotating relative to the rotating body 31, and When the rotating body 31 starts to rotate against the housing 11, the brake is directly applied. The above description is an example in which the cam portion 15 and the cam body 41 are provided with two cam surfaces 15 a and 4 2 a, respectively. However, the cam surfaces 15 a and 4 2 a may be one or more than three. . [Effect of the Invention] As described above, according to the present invention, the cam body, the cam body, and the urging member (the urging member brake applying mechanism) are contained in the rotating body, so that the damper can be miniaturized. Then, since the cam body can be rotated by a predetermined angle with respect to the rotating body, the brake can be applied after acceleration of the opening speed of the lintel, so the lintel with a lighter weight can also be opened by the self weight. In addition, since the cam portion and the cam body are provided with two or more cam surfaces, the cam body does not incline the cam portion, and the braking torque can be increased similarly.

314154.ptd Page 14 577963 Brief Description of Drawings [Simplified Description of Drawings] Figure 1 is an exploded perspective view of a damper according to an embodiment of the present invention. Fig. 2 is a side view of a right cross section of each element shown in Fig. 1. Fig. 3 is the cam diagram of the cam part and the cam body shown in Fig. 1 and Fig. 2. The first surface is shown in Fig. 4 5 and Fig. 5 Yuan Gezhi's instructions-X X, X, X, D, X, Y, X, Y, X, X, X, X, X, X, X, X, X, X, X, X, X, X, X, X11 Mounting part 20 Mounting part L 21 Top cover 22 Fastening part 23 Sub-L 31 Rotating body 32 ^ 42 Large diameter portion 34 Receiving groove 35 ^ 45 Through hole 36 Middle diameter portion 37 '44 Small diameter portion 38 Flat surface 41 Cam body 43 Convex strip 51 Coil spring (elastic member) 61 Viscous liquid 71 0-ring (sealing member) D Damper

314154.ptd Page 15

Claims (1)

577963 Case No. 91133226 Date of application for patent 1. Scope of application 1. A damper, a casing, with a central part of a circle, a cam part protruding toward the front end, and a rotating body at the front end, which can be cam body, can be opposite The aforementioned rotation is connected to the aforementioned cam surface; the elastic pressing member is provided to make the aforementioned cam body press contact with the viscous liquid, and fills 2. If the scope of the patent application is relative to the aforementioned rotation body 3. If the scope of the patent application applies to the cam portion and the aforementioned cam 93. 1.13-p Repair date ',, ... Preparation: cylindrical receiving recess, the bottom of the receiving recess, the cam portion has a T07 wheel surface in the circumferential direction toward the axis of the receiving recess; the rotation method accommodates In the receiving recessed portion; for the rotating body to move in the axial direction without rotating at the same time, and a cam surface in the circumferential direction is slid between the cam body and the rotating body in the cam portion; Receiving recess. The damper according to item 1, wherein the cam body is rotatable by a predetermined angle. The damper according to item 1 or item 2, wherein the body is provided with two or more cam surfaces. 314154.ptc Page 16