Arrangement for the vibration decoupling of a motor for motorized two-wheelers, having an engine-mount swing arm

Abstract

An arrangement for the vibration decoupling of a motor for motorized two-wheelers is provided. In an embodiment of the two-wheeler an engine-mount swing arm is mounted to be rotatable about a first shaft. The first shaft is mounted on the vehicle frame of the two-wheeler to be rotatable about a second shaft by way of a decoupling swing arm. A support rod fitted with damping buffers is provided on the engine-mount swing arm, oriented such that vibrations are decoupled in and against the direction of travel, with vibrations being decoupled in the direction of the cylinder axis and providing good anti-squat behavior.

Claims

1. An arrangement for decoupling engine vibration from a frame of a two-wheel motor vehicle, comprising: a first shaft; an engine-mount swing arm with an engine and one of the two vehicle wheels, the engine-mount swing arm being arranged to rotate about the first shaft; a second shaft disposed on fastening clips of a frame of the motor vehicle; a decoupling swing arm arranged to couple the first shaft and the second shaft; a supporting rod coupled by a fastening element at a first end to the first shaft; and at least one damping buffer arranged to support a second end of the supporting rod on the frame of the motor vehicle, wherein the first shaft is located vertically below the second shaft, the decoupling swing arm is rotatable about the second shaft and includes connecting arm portions at opposite ends of the decoupling swing arm, each of the connecting arm portions being coupled to a respective one of the first and second shafts, the supporting rod is oriented to decouple engine vibration from the frame in at least one of a longitudinal direction of the motor vehicle and an axis direction of a cylinder of the engine, the frame includes a frame side stop configured to receive the second end of the supporting rod in a manner that permits supporting rod movement along a longitudinal axis of the supporting rod, and the supporting rod is supported against the frame side stop by rubber buffers located on respective front and rear sides of the frame side stop in a manner that permits and dampens supporting rod movement in a direction of the supporting rod longitudinal axis.

2. The arrangement according to claim 1, wherein the engine is a vibration-compensated single-cylinder engine, and the supporting rod is oriented along the cylinder axis direction.

3. The arrangement according to claim 1, wherein the decoupling swing arm is a single swing arm.

4. The arrangement according to claim 3, wherein the decoupling swing arm is located lower on the motor vehicle than the engine cylinder.

5. The arrangement according to claim 1, wherein the second shaft is rotatably disposed on the fastening clips of the frame.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic lateral view of a motorized two-wheeler with the arrangement for the vibration decoupling according to an embodiment of the present invention.

(2) FIG. 2 is a detailed perspective view of the engine-mount swing arm from FIG. 1;

(3) FIG. 3 is a schematic view of an embodiment of the supporting rod with damping buffers according to the present invention.

DETAILED DESCRIPTION OF THE DRAWINGS

(4) FIG. 1 illustrates an example of a view from a side of a motorized two-wheeler 2, which is designed with an example arrangement 1 for the vibration decoupling according to the invention. FIG. 2 illustrates the arrangement 1 in a detail view. In the following, reference will be made to an equal extent to FIGS. 1 to 3. The arrangement 1 for the vibration decoupling is designed with an engine-mount swing arm 10, which is disposed to be rotatable about a first shaft 11. In the following, the first shaft 11 will also be called the shaft of the engine-engine mount swing arm 10. The first shaft 11 with a decoupling swing arm is rotatably disposed at a second shaft 12 on the vehicle frame 3 of the two wheeler 2. Furthermore, a supporting rod 13 equipped with damping buffers 14a, 14b is provided at the engine-mount swing arm 10. In FIGS. 1 and 2 only the damping buffer 14b is visible of the damping buffers 14a, 14b, while the second damping buffer 14a is situated farther away at the extreme end of the supporting rod 13, as illustrated in FIG. 3. One frame-side stop 15a, 15b respectively is situated between the damping buffers 14a, 14b.

(5) In the present embodiment of the invention, the supporting rod 13 is situated approximately in the vehicle longitudinal direction F or is arranged to be slightly rotated at an angle of approximately 15 with respect to the longitudinal direction F of the vehicle. The orientation of the decoupling swing arm 20 and of the supporting rod 13 amounts approximately to an angle of 90. In other words, this means that the supporting rod is oriented approximately in the direction of motion of the cylinder, i.e. in the cylinder direction, while the decoupling swing arm 20 is arranged in a direction orthogonal thereto, thus approximately in a vertical direction (transverse direction with respect to the longitudinal direction of the vehicle). Likewise, the spring strut 30, which is illustrated in FIG. 1, is arranged in a vertical direction.

(6) FIG. 2 further shows that the second shaft 12, which as the decoupling shaft, is disposed at frame-side fastening clips 16a, 16, is rotatably disposed on the latter. In this case, the fastening clips may project as sheet metal clips or bearing elements at the frame in such a manner that the second shaft 12 is in each case disposed between the fastening clips 16a, 16b. The decoupling swing arm 20 further has two connecting arms 20a, 20b with one fastening element 21, 22 respectively arranged at both ends for the respective shafts 11, 12. The supporting rod 13 is fastened with its fastening-side end 13a directly together with a fastening element 21 of the first shaft 11 of the engine-mount swing arm 10. In an alternative embodiment of the invention, two supporting rods 13 could preferably be arranged in parallel, in each case, together with a fastening element 21, on a left and right end of the first shaft together with the latter.

(7) As explained above, at its movable end 13b, the supporting rod 13 has two damping buffers 14a, 14b, preferably designed as rubber buffers, the rubber buffers 14a, 14b, in each case being pressed against a frame-side stop 15a, 15b, depending on the direction of motion of the engine-mount swing arm in or against the direction of motion.

(8) In the present embodiment of the invention, the frame-side stop is arranged such that the supporting rod projects through a frame opening, specifically through an opening in the frame-side stop, in order to be able to support itself by the first rubber buffer 14b against the stop in the direction of travel, while it can support itself against the direction of travel by the second buffer 14a on the opposite side of the frame-side stop. In order words, through an opening in the frame, the supporting rod can in each case appropriately dampen the vibrations by way of the buffers 14a, 14b.

(9) The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.