Torque rod
AssigneeYamashita Rubber Kabushiki Kaisha
InventorHitoshi Shimada
Life of this patent
Estimating the term…
Abstract
A second inner member and a second insulator are provided in a second ring-shaped member forming a torque rod. A first bore section and a second bore section are provided in front of and in the rear of the second inner member. The insulator has an elastic arm section extending in the direction of a Y axis. A spring adjustment recess extends in a slit shape in the direction of an X axis from an end of the first bore section. The spring adjustment recess forms an unrestricted part of the elastic arm section by the second ring-shaped member, whereby the Z spring in the axial direction of the inner member is lowered, and the XZ spring ratio can be changed greatly while maintaining the size of the X spring in the main vibration inputting direction.
Claims11
A torque rod comprising:
- a rod main body of a long member,
- a small round section and a large round section which form a pair of vibration isolating connecting sections different in size, being provided in each end in the longitudinal direction of the rod main body,
- at least the large round section of the vibration isolating connecting sections including a ring-shaped member provided in the rod main body, an inner member arranged in a center portion of the ring-shaped member, and an insulator of an elastic body elastically connecting the inner member and the ring-shaped member,
- wherein, a center axis of the inner member is a Z axis, a main vibration inputting axis orthogonal to the Z axis is an X axis, and an axis orthogonal to these Z axis and X axis is a Y axis,
- wherein the insulator extends from the inner member to both sides of the X axis and includes
- an elastic arm section, each extending end of which is joined to, and restricted in the Y axis by the ring-shaped member, and
- a spring adjustment recess provided in a part of a joint portion of the elastic arm section relative to the ring-shaped member, and separating a part of the elastic arm section from the ring-shaped member so as to provide an unrestricted region on the elastic arm section that is separated from and not restricted by the ring-shaped member, and
- wherein the insulator has a spring value of Ex in the X axis, a spring value of Ey in the Y axis, and a spring value of Ez in the Z axis, all of which are affected by the depth and width of the spring adjustment recess,
- wherein the insulator has a XZ spring ratio of Ez/Ex, which may be reduced by including the spring adjustment recess in comparison to not including the spring adjustment recess, in order to adjust a frequency of the rigid body resonance in the direction of the Z axis in such a way as to be offset from the high sensitive frequency on a vehicle body side.
Dependencies are inferred from the claim text.