JPH0645721Y2 - Torque rod - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a torque rod for suppressing an excessive rotation amplitude of a power unit (which connects an engine and a transmission) caused by a reaction torque when a vehicle is accelerated.

(Prior Art) Various devices for supporting a power unit have been devised. And FF (front engine front
In a drive, etc., the vibration of the engine is absorbed by the mount device, and the torque rod suppresses the excessive rotation amplitude of the power unit due to the reaction torque generated when the vehicle starts or suddenly accelerates.

A conventional torque rod is disclosed in Japanese Utility Model Publication No. 52-51377. This is one in which a power unit and a vehicle body are connected to each other, and an elastic member is provided at a connecting portion with the power unit and a connecting portion with the vehicle body.

With this configuration, the elastic member is sufficiently deformed, and the stress generated in each of these portions opposes the reaction torque of the power unit, and an excessive increase in the rotational amplitude can be suppressed.

In JP-B-51-40327, the connecting portion of the torque rod on the power unit side is arranged in a circle whose diameter is a line segment connecting the shaft support portion on the vehicle body side and the center of impact rotation during acceleration of the power unit. Technology is disclosed.

With such a configuration, the reaction rod causes the torque rod to swing inside the power unit around the shaft support portion to move the power unit to the elastic support member side, and the reaction torque acts as a compression force of the elastic support member to cause rotational vibration. It is an attempt to suppress the width.

(Problems to be solved by the invention) However, in the torque rod disclosed in Japanese Utility Model Publication No. 52-51377, both ends of the rod are simply connected to the power unit and the vehicle body. It was very effective, but when the direction of the reaction torque changed, the effect was not sufficient.

That is, in a general automobile, the rotation center of the power unit when the vehicle suddenly accelerates from the stop is at the center of gravity position, and as the road surface reaction force increases as it accelerates, the rotation center becomes closer to the center of gravity. The direction of the reaction torque changes as it continuously moves to the output shaft, but this torque rod cannot follow the change in this direction and there is a problem that a sufficient suppression effect cannot be obtained. It was

Further, in the torque rod disclosed in Japanese Patent Publication No. 51-40327, the reaction torque generated in the power unit causes the torque rod to oscillate, causing the power unit to move in parallel so that the elastic support member absorbs the torque. Therefore, there is a problem that a large compressive force is applied to the elastic support member, which may cause breakage or deterioration of durability.

The present invention has been made in view of the above problems, and has a strength that can sufficiently suppress the reaction torque even if the direction of the reaction torque changes, and the product cost is low and the torque with high dimensional accuracy is high. The purpose is to provide rods.

(Means for Solving Problems) As means for solving the above problems and achieving the object, three cylindrical mounting members to be connected to a vehicle or a power unit are provided, and each mounting member is In a torque rod formed by connecting a pair of rod parts, the torque rod is
The two plate members of the substantially L-shaped first member and the second member are joined by welding, and the flange for the welding is
The torque rod is oriented in a direction orthogonal to the axial center direction of the shaft passing through the rubber bush, and the first member is formed of a flat plate having one hole at each end and the bending portion,
The second member is formed by a plate body having burring holes at positions corresponding to the holes of the first member, and a bead is formed between the burring holes of the second member. It is a thing.

(Operation) With the above configuration, the torque rod is formed into a shape bent at a constant angle.
Since the direction of the flange that joins the first member and the second member is orthogonal to the axial center direction of the shaft that penetrates through the rubber bush, it can be used as a torque rod for suppressing the rotational force. , And the bead provided on the second member, the reaction torque can be sufficiently suppressed even if the rotation center of the power unit moves due to the reaction torque, and excessive rotational vibration of the power unit can be effectively prevented.

Moreover, since the outer housing portion and the rod portion of the mounting member are integrally formed, welding is not required, the number of parts is reduced, and the dimensional accuracy can be improved.

(Embodiment) Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

The first member 1 is one in which the outer housing parts 2, 3, 4 and the rod parts 5, 6 are integrally punched from a steel plate,
As shown in the figure, it is substantially L-shaped, and a large diameter hole 7 is formed at one end thereof, and small diameter holes 8 and 9 are formed at the bending portion and the other end thereof.

The outer shape of the second member 10 is approximately L, which is the same as that of the first member 1.
The large-diameter hole 7 of the first member 1 has a letter-like shape.
And burring holes 11, 12, 1 at the positions corresponding to
3 are formed and the rod parts 5, 6 between the burring holes 11, 12, 13 are formed.
Beads 14 and 15 are formed on the. The second member 10 is also integrally formed from a steel plate.

Then, the first member 1 and the second member 10 are fixed by spot welding. And a flange provided on the first member 1 and the second member 10 for this spot welding.
As shown in FIG. 2 and FIG. 3, the direction of 1a and the flange 10a is the axial direction of the shaft that penetrates through holes 7, 8, 9 and burring holes 11, 12, 13 via rubber bushes 16, 20. The direction is orthogonal to. As a result, the bending strength of the torque rod can be increased.

FIG. 5 shows a state where a rubber bush is attached to the outer housing. The rubber bush 16 attached to the large-diameter burring hole 11 of the outer housing portion 2 is shown.
Is provided with a metal collar 17 at the center, and slits 18 are formed above and below the collar 17.
And a small diameter burring hole 1 in the outer housing parts 3 and 4
A rubber bush 20 having a metal collar 19 provided at the center is attached to the terminals 2 and 13. In this way, the torque rod 24 having the three mounting portions 21, 22, and 23 is constructed.

Then, as shown in FIG. 4, the large-diameter mounting portion 21 of the torque rod 24 is attached to the power unit 25, and the small-diameter mounting portion 2 is attached.
Bracket 2 fixing 2,23 to body member 26
Attached to 7,28, the power unit 25 is supported by the vehicle. Reference numerals 29, 30, and 31 in FIG. 4 denote mount devices, which support the load of the power unit 25. Further, 32 is a stopper device, which acts to suppress yawing of the power unit 25.

In this embodiment, in order to support the power unit 25, a torque rod 33 having the same structure as the torque rod 24 is provided so as to face the front-rear direction of the vehicle.

Next, the torque rods 24, 33 configured as described above
The action of will be explained.

When the vehicle is stopped, the load of the power unit 25 is supported by the mount members 29, 30, 31 and the vibration of the engine is absorbed by these mount members 29, 30, 31 and at the same time the torque rods 24, 33 are also supported. Be absorbed. This is because the slits 18 formed in the rubber bushes 16 of the torque rods 24, 33 have a soft characteristic in the vertical direction.

Then, during acceleration, the reaction torque of the power unit 25 can be suppressed by the torque rods 24, 33. Here, when accelerating the vehicle, the power unit generated by the reaction torque
Although the center of rotation of 25 moves continuously, since the torque rods 24 and 33 of the present invention are bent in a substantially L shape,
It is possible to follow the movement of the rotation center and sufficiently suppress the reaction torque.

Although two torque rods are used in this embodiment,
It is also possible to consider the weight of the power unit and the strength of the torque rod as one unit.

(Effects of the Invention) As described in detail above, according to the present invention, the mounting portions having the rubber push of the torque rod are provided at three places, and the pair of rods connecting the torque rods are fixed and bent at a constant angle. Since it has a shape, it is possible to suppress the reaction torque in any acceleration state.

In this case, the first and second parts constituting the torque rod
Since the direction of the flange for welding the member of (1) is set to the direction orthogonal to the axial center direction of the shaft penetrated through the rubber bush, the bending strength as the torque rod can be increased and the rotational force can be suppressed. As a torque rod, it can be used as a foothold.

Further, the burring hole of the second member is formed into a tubular shape, and is a press-fitting tube for a rubber bush. For this reason, since the rubber bush support cylinder is formed in a state of being joined to the first member, the processing of the torque rod and the rubber bush support cylinder can be performed at the same time.

Since the bead is formed between the burring holes of the second member, the strength is further increased in the direction in which the rotational force of the engine acts, and this bead is formed between the first member and the second member. The bending resistance of the plate between each hole and each burring hole will be improved.

Furthermore, the outer housing and the rod of the mounting portion are integrally formed from a plate material to have a simple structure, and the number of parts and the number of assembly steps can be reduced, so that the product cost can be reduced and the outer housing portion can be welded. Since the rod portion is not connected, the dimensional accuracy can be improved.

[Brief description of drawings]

1 is a front view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II of FIG. 1, FIG. 3 is a sectional view taken along the line II-II of FIG. FIG. 5 is a front view showing a mounting state of a torque rod having mounting members at three positions on a vehicle, FIG. 5 (a) is a front view of a torque rod of the present invention, and FIG. 5 is a sectional view taken along line III-III of FIG. 1 …… First member 2,3,4 …… Outer housing part 5,6 …… Rod part 7,8,9 …… Hole 10 …… Second member 11,12,13 …… Burling hole 14, 15 …… Bead 16,20 …… Rubber bush 21,22,23 …… Mounting part 24 …… Torque rod 25 …… Power unit

Claims (1)

[Scope of utility model registration request] 1. A torque rod comprising tubular mounting members connected to a vehicle or a power unit at three locations, and the mounting members being connected by a pair of rod portions, wherein the torque rods are substantially L-shaped. The first plate member and the second plate member are joined by welding, and the flange for the welding is formed in the axial direction of the shaft that penetrates the torque rod through the rubber bush. The first member is formed of a flat plate having one hole at each end and the bending portion, and the second member has a burring hole at a position corresponding to the hole of the first member. A torque rod, characterized in that it is formed of a plate body provided, and a bead is formed between each burring hole of the second member.