JP4242107B2 - Rotating damper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary damper. More specifically, the present invention relates to a rotary damper that includes a damper mass that is coupled to a damper hub via an elastomer intermediate laminate, and that can be attached to a driving end of a cardan shaft for an automobile.
[0002]
[Prior art]
Rotational dampers are generally known in various embodiments and applications. These rotary dampers are used in all places where it is necessary to suppress the effects of undesirable rotational vibrations, in particular on cardan shafts. In this case, torsional or circumferential and axial vibrations that occur in the drive train or drive shaft are reduced by a rotary damper that has torsion and an assigned axial damping action. Vibration occurs both at idling and at high speed when the cardan shaft rotates at high speed. Correspondingly adjusted rotating dampers resist vibrations and attenuate the vibrations, improving driving comfort.
[0003]
Normally, the rotary damper is designed for long life and is not susceptible to wear. Therefore that the damper mass deviates from the elastomeric intermediate laminate is that it does not occur only very rarely. However, such a situation cannot be completely eliminated. For these cases extremely rare, when the resilient coupling between the hub and the flywheel ring is released, so that the unit in the vicinity rotary damper is not damaged, that the rotary damper disposed or formed desirable. For example, in the automobile industry, there is a tendency to reduce the weight. At this time, the fuel tank attached in the vicinity of the cardan shaft is manufactured from a resin that may be damaged by a detached damper mass.
[0004]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to improve the reliability of the rotary damper by improving the rotary damper of the type mentioned at the beginning. It is an object of the present invention to provide a rotary damper that does not damage surrounding components when the damper mass is removed .
[0005]
[Means for Solving the Problems]
The above problem is solved according to the present invention by the damper mass being surrounded by a protective holder whose periphery is fixed to a component of the cardan shaft. Accordingly, the protective holding tool functions when the damper mass that may occur in some cases is removed, and the protective holding tool is provided to prevent the released damper mass from being left uncontrolled from a predetermined position. This protective holder prevents the damper mass from moving out of position.
[0006]
Basically, the protective holder can be fixed in two ways. One possible way is to attach the protective holder to the damper mass in a form-fitting manner and to prevent it from rotating to the cardan shaft components. Therefore, the protective holder can be manufactured from a protective thin plate made of a material that can be deep drawn. The protective thin plate has fixing locking bodies that are uniformly distributed in the circumferential direction. The fixing locking bodies extend inward in the radial direction and are provided so as to form a pair. Is configured such that the fixing locking bodies are symmetrical with respect to the radius. The fixing locking body is preferably disposed on a side surface of the protective thin plate facing the transmission shaft. The pair of fixing latches is formed in a bifurcated shape or a substantially U shape, and is attached to a connecting member provided between the cardan shaft and the transmission shaft. In other words, the protective thin plate is coupled to the damper mass in a shape-fitting manner, but by being fixed to the connecting member via a pair of bifurcated fixing locking bodies, it is possible to prevent the damper mass from rotating in the rotational direction. Sufficient clearance or play is provided.
[0007]
Another principle possibility of forming the protective holder and fixing it to the cardan shaft is that the protective holder surrounds the damper mass intermittently in the circumferential direction, i.e. in the form of a basket. In this case, a slight gap can be provided between the protective holder and the damper mass, so that the damper mass has a sufficient gap for damping during its movement. Such a protective holder can be composed of separate protective brackets that are uniformly distributed in the circumferential direction of the rotary damper. The protective bracket is fixedly coupled to a connecting element between the cardan shaft and the transmission shaft. When specially necessary, the damper mass can be held in a predetermined position by the protective bracket so that the damper mass is not biased in the radial direction or the axial direction.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings.
[0009]
FIG. 1 is a perspective view of a rotary mass damper or a rotary damper 10 according to a reference example of the present invention. The rotary damper 10 includes a hub 3 and a damper mass 4. An elastomer member or an elastomer body 2 is attached between the damper mass 4 and the damper hub 3. The protection holder 1 for the damper mass 4 is composed of a substantially annular protective thin plate 5 surrounding the damper mass 4 from the outside in this embodiment. At this time, the protective thin plate 5 has a fixing locking body 6 provided as a pair of members. The fixing locking bodies 6 are uniformly distributed in the circumferential direction and extend toward the inside in the radial direction. In this embodiment, three pairs of fixing locking bodies are provided, and three fixing openings 7 of the hub 3 are also provided. Each pair of fixing locking bodies is provided with a fixing opening 7. It is arranged to correspond to. The pair of fixing latches 6 are formed symmetrically with respect to the radius.
[0010]
FIG. 2 shows a cross section taken along line AA of the rotary damper 10 shown in FIG. The protective holder 1 is composed of a protective thin plate 5 that fits in shape, that is, fits closely to each other and surrounds the damper mass 4 from its outer periphery. The fixing locking body 6 faces inward in the radial direction in the rotary damper 10. An elastomer intermediate laminate 2 is provided between the hub 3 and the damper mass 4.
[0011]
FIG. 3 shows the protective holder 1 shown in FIGS. 1 and 2 attached to the connecting body 20 between the transmission shaft 21 and the cardan shaft 22. The transmission shaft 21 and the cardan shaft 22 are coupled to each other via a connecting body 20 having rotational elasticity and bending elasticity. The basic component of the connecting body 20 is a rubber ring 23, which is on the one hand a fixing shaft 25 for the transmission shaft or drive shaft 21 by screws 24 and on the other hand a fixing hub 27 for the cardan shaft 22 by screws 26. Each is screwed. In this embodiment, the fixing hub 27 and the thin plate 28 constituting the damper hub 3 of the rotary damper 10 are also screwed by screws 26. The protective thin plate 5 is engaged with a connecting member or spacer 29 located near the screw 26 by the fixing latch 6. By this method, the protective thin plate 5 and the damper mass 4 are securely held in the predetermined position, and the fixing disk is fixed by the fixing disk, that is, the pair of the spacer 29 and the bifurcated fixing locking body 6. A configuration is provided in which the body 6 has a predetermined spacing with respect to the screw 26, and the freedom of movement of the rotary damper 10 necessary for the circumferential damping action is obtained. At this time, the damping action of the rotary damper 10 is not affected.
[0012]
Figure 4 is a similar perspective view as Figure 1 showing the actual施例rotary damper 10 according to the present invention. In this embodiment, the protective holder 1 is composed of a plurality of brackets 30 that are uniformly distributed in the circumferential direction of the rotary damper 10.
[0013]
FIG. 5 is a cross-sectional view taken along line AA of the rotary damper 10 shown in FIG. The protective bracket 30 intermittently surrounds the damper mass 4 connected to the damper hub 3 via the elastomer intermediate laminate 2 in the circumferential direction, that is, in a cage shape. A hole 31 is provided in the protective bracket 30, and a fixing screw 26 is inserted into the hole 31. The damper hub 3 has an opening 32 that passes therethrough, into which a sleeve-like formed body 33 of the protective bracket 30 is inserted.
[0014]
FIG. 6 shows the protective bracket 30 attached to the rotary damper 10 and the connecting element 23 of the connecting body 20 arranged between the transmission shaft 21 and the cardan shaft 22. The connecting element 23 is substantially formed from rubber. The protective bracket 30 is fixedly coupled to the fixing hub 27 of the cardan shaft 22 by screws 26. At this time, the protective bracket 30 simultaneously functions as a spacer 29 between the fixing hub 27 and the rubber ring 23 of the connector 20. Note that the angular extent or width of the protective bracket 30 is adjusted for each application. The protective holder 1 does not affect the damping action of the rotary damper 10. In other respects, the structure of the connecting body 20 corresponds to the connecting body shown in FIG.
[0015]
【The invention's effect】
The present invention relates to a rotary damper that can be attached to a driving end of a cardan shaft for an automobile, in particular, provided with a damper mass coupled to a damper hub via an elastomer intermediate laminate, wherein the damper mass (4) is a cardan shaft. The rotary damper is surrounded by a protective holder (1) fixed to the component (22). With this configuration, the reliability of the rotary damper increases, and a rotary damper that does not damage surrounding components when the damper mass is removed is provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a protective holder that surrounds a damper mass in a shape-fitting manner.
2 is a cross-sectional view taken along line AA of the rotary damper shown in FIG.
FIG. 3 is a partial cross-sectional view showing a connection between a cardan shaft and a transmission shaft provided with a locking member inserted into a coupling screw for the cardan shaft.
FIG. 4 is a perspective view showing a protective holder made of a protective bracket.
5 is a cross-sectional view taken along line AA of the rotary damper shown in FIG.
FIG. 6 is a partial cross-sectional view showing the coupling between the cardan shaft and the transmission shaft with a protective bracket screwed on.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Protective holder 2 Intermediate laminated body 3 Hub 4 Damper mass 5 Protective thin plate 6 Fixing latch 7 Fixing opening 10 Rotating damper 20 Linkage 21 Transmission shaft 22 Cardan shaft 23 Rubber ring 24 Screw 25 Fixing hub 26 Screw 27 Fixing hub 28 Thin plate 29 Spacer 30 Protective bracket

Claims (1)

In particular, it is a rotary damper comprising a damper mass that can be attached to a driving end of a cardan shaft for an automobile and is connected to a damper hub via an intermediate laminate made of elastomer, and the damper mass (4) is connected to the cardan shaft (22 ) component which is fixed to a protective holders are by (1) is surrounded Ri preparative around, whereby when said damper mass (4) is released, to move deviates the damper mass (4) In what is prevented,
The protective holder (1) comprises a separate protective bracket (30) that intermittently surrounds the damper mass (4) in the circumferential direction and is uniformly distributed in the circumferential direction of the rotary damper (10). ,
The protective bracket (30) is fixed to a connecting element between the cardan shaft (22) and the transmission shaft (21);
A rotary damper in which the protective bracket (30) surrounds the damper mass (4) with a slight gap.

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