JPH01317818A - Rigidity adjustable device for vehicular stabilizer - Google Patents

Abstract

PURPOSE:To aim at performing the changeover of the rigidity smoothly and freely by forming a run off to prevent the interference of a connecting rod at the time of cancelling the restriction at a collet to increase the roll rigidity restricting and cancelling the connecting rod of a stabilizer. CONSTITUTION:In a rigidity adjusting device 10, a clamp link 36 is energized upward by means of a compression spring 44 in the state that a wire cable 46 is not pulled, and the switch part 32 of a collet 30 is closed. The click part 34 of the collet is engaged at the recessed part 12a of a con'rod 12, and the axial movement of the con'rod 12 is restricted to the side of a supporting member 20. As a result, the torque of the stabilizer 16 is activated between the body or a suspension, and the roll rigidity of the body is set largely. A run off 56 for preventing the interference made by the upper flute part 12b of the recessed part 12a is formed in the inner circumference of the click part 34. The generation of pinching between tapered part 32a of the switch means 32 and the aperture of the clamp link 36 is thus prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a variable stiffness device for a stabilizer for a vehicle that can change the roll stiffness of a vehicle body depending on the running condition of the vehicle.

(Prior art) As a rigidity variable device for this type of vehicle stabilizer,
For example, there is a device proposed in Utility Model Application No. 62-159023, and as shown in the cross-sectional view of the main part in FIG. (Connecting rod) 1 is attached so as to be movable in the axial direction with respect to the vehicle body side or suspension side, and between these connecting rods 1 and the vehicle body side or suspension side, the axial movement of the connecting rod 1 is controlled according to the vehicle running conditions. It is constructed by providing a rod lock mechanism 2 for restraint or release of restraint.

The rod lock mechanism 2 includes a cylindrical collet 3 that is fitted onto the connecting rod l, and the collet 3 is provided with an opening/closing portion 3b that can be opened and closed in the radial direction by an axial slit 3a. When the claw portion 3C formed on the inner periphery of the portion 3b is engaged with the recess 1a formed in the connecting rod 1 by the closing operation of the opening/closing portion 3b, the connecting rod 1 is restrained in the axial direction and the stabilizer is The opening/closing part 3b is firmly held, thereby increasing the roll rigidity of the vehicle.
When the claw portion 3C is disengaged from the recess la by the opening operation, the connecting rod l is released from the restraint, and the support portion of the stabilizer is freely moved, thereby reducing the roll rigidity of the vehicle. There is.

The opening/closing operation of the collet 3 is performed by forming a tapered part 3d on the outer periphery of the opening/closing part (in the illustrated state, the claw part 3C is fitted into the recessed part 1a, so that the tapered part 3d has approximately the same diameter. .

) is formed, and a clamping member 4 is fitted into the tapered portion 3d, and the clamping member 4 is moved in the axial direction of the collet 3, thereby performing the clamping.

That is, the clamp member 4 is attached to the tapered portion 3 of the collet 3.
By moving d in the large diameter direction (upward in the figure),
The clamp member 4 presses the outer periphery of the opening/closing part 3b in the inner diameter direction, and the collet 3 is closed, and the clamp member 4 is moved in the small diameter direction (downward in the figure) on the tapered part 3d. As a result, the pressure on the outer periphery of the opening/closing portion 3b is released, so that the opening operation of the collet 3 is performed.

By the way, in such a conventional rigidity variable device for a vehicle stabilizer, the clamp member 4 is biased by the spring 5 in the direction of the larger diameter of the tapered portion 3d of the collet 3, so that the connecting rod 1 is normally restrained. It is in a state of high rigidity.

Therefore, the roll rigidity can be reduced by moving the clamp member 4 in the direction of the smaller diameter of the tapered portion 3d against the biasing force of the spring 5, thereby opening the collet 3. .

(Problem to be Solved by the Invention) However, in such a conventional vehicle stabilizer rigidity variable device, when an attempt is made to switch the roll rigidity to a small value while a torsional force is applied to the stabilizer due to driving on a rough road, etc. Since the torsional reaction force (in the axial direction) of the stabilizer is already acting on the connecting rod 1, the axial movement of the connecting rod 1 is started along with the opening operation of the collet 3.

For example, if the collet 3 is opened with a downward torsional reaction force acting on the connecting rod l, the moving speed of the connecting rod l is extremely high due to the torsional reaction force, so the collet 3 does not fully open. At this time, the upper end (
Stepped part) lb is forced into it.

Therefore, the collet 3 is forced open by the stepped portion 1b of the recessed portion 1a, and the opening force of the collet 3 presses down the clamp member 4, which is attempting to move the tapered portion 3d in the direction of the smaller diameter. This causes the so-called twisting phenomenon.

In this way, if a twist occurs between the collet 3 and the clamp member 4, there is a risk that the variable rigidity device will become inoperable. However, there was a problem in that the roll stiffness of the vehicle remained constant, resulting in poor ride comfort.

Therefore, in view of such conventional problems, the present invention provides a variable rigidity stabilizer for a vehicle that allows the rigidity of the stabilizer to be freely changed without causing twisting even when a torsional force is acting on the stabilizer. The purpose is to provide equipment.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a connecting rod in which a stabilizer is supported on a supporting body side of a vehicle body or a suspension, and the supporting portion is movable in an axial direction, and the connecting rod. and the support body, is fitted onto the connecting rod, and forms a radial opening/closing portion;
a collet, the claw portion formed on the inner periphery of the opening/closing portion being engaged with a recess formed in the connecting rod by the closing operation of the opening/closing portion to restrain axial movement of the connecting rod; In a rigidity variable device for a vehicle stabilizer that increases roll rigidity by restraining a connecting rod and decreases roll rigidity by releasing the restraint, the collet is provided with an inner periphery of the claw portion of the collet, when the restraint of the connecting rod is released; It is constructed by forming a relief part to prevent the upper step part of the recess from interfering with the downward movement of the connecting rod.

Furthermore, the opening/closing operation of the opening/closing part formed in the collet is
In the case where the clamping member is fitted into a tapered part formed on the outer periphery of the opening/closing part, a clamp member is provided in the tapered part of the collet to prevent the collet from opening when the connecting rod is released from the restraint. On the other hand, the object can also be achieved by providing a relief part to prevent the clamp member from interfering with the clamp member.

(Function) In the vehicle stabilizer variable rigidity device of the present invention having the above configuration, as one configuration for achieving the object, when the connection port/rad is released from the connection, Since a relief part is formed to prevent the upper step of the recess from interfering with the downward movement of the connecting rod, when the collet is opened by releasing the restraint of the connecting rod, the connecting rod moves downward. Even if you start moving,
Since the claw portion and the upper step portion do not interfere with each other, the collet is prevented from being forcibly pushed open by the connecting rod, so that no twisting occurs between the two.
Such a restraint release operation is performed smoothly.

Further, as another configuration for achieving the purpose, the opening/closing operation of the opening/closing part formed in the collet is performed by a clamp member fitted into a tapered part formed on the outer periphery of the opening/closing part. In this case, a relief part is provided in the tapered part of the collet to prevent the clamp member from interfering with the opening operation of the fret when the connection rod is released from the connection rod. Even if the connecting load is forcibly inserted between the claws of the collet and pushes the collet open when releasing the restraint, the relief portion prevents the clamp member from interfering with the opening/closing portion. Therefore, it is possible to prevent the occurrence of stiffness between the two.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

That is, FIG. 1 shows an embodiment of the rigidity variable device 10 for a vehicle stabilizer according to the present invention, and 12 is a connecting rod as a connecting rod. The connecting rod 12 is connected to the end portion, and the intermediate portion of the connecting rod 12 is supported via a collar 18 by a connecting rod support member 20 serving as a support body so as to be movable in the axial direction.

Although not shown, the stabilizer 16 is bent into a substantially U-shape as a whole, and its both sides are arranged in the longitudinal direction of the vehicle, and the middle part is arranged in the lateral direction of the vehicle, and the connecting rods are attached to both ends of the stabilizer 16, respectively. 12 is connected, while the intermediate portion is rotatably supported on the vehicle body side (not shown).

Incidentally, the connecting rod 12 may be provided at either side end portion of the stabilizer 16.

The suspension rod support member 20 includes a suspension arm (not shown) that rotatably and vertically swingably supports a wheel (not shown), or a suspension arm (not shown) that is configured as a separate member that is integrally fixed to the suspension arm. , the connecting rod support member 2
0 and the connecting rod 12 are fixed or released via a rod lock mechanism 24, which will be described later.

The collar 18 passes through the connecting rod support member 20 and is attached to the connecting rod support member 20 through rubber bushings 22° 228 arranged on both sides thereof, with a buffering function in the vertical direction, and at the upper end of the collar 18. A base plate 26 of a rod lock mechanism 24 is screwed onto the portion and fixed integrally therewith.

The rubber bushings 22.22a are sandwiched between the base plate 26 and a nut 18a screwed onto the lower end of the collar 18 in the drawing.

A large diameter hole 26a for inserting the connecting rod 12 is formed in the center of the base plate 26, and a cylindrical collet 30 that is fitted onto the connecting rod 12 is provided on the inner periphery of the large diameter hole 26a. They are fitted and fixed via pins 28.

The fret 30 is also shown in FIGS. 2 and 3, and has an opening/closing part 32 that can be opened and closed in the radial direction through a plurality of slits (divided parts) extending in the axial direction, and the inner periphery of the opening/closing part 32. A claw portion 34 that can be engaged with a recess 12a formed in the connecting rod 12 is provided to protrude in the inner diameter direction.

In the opening/closing part 32, the claw part 34 is attached to the connecting rod 1 in a natural state.
2, the outer periphery of the opening/closing part 32 has a tapered shape whose diameter increases upward in the figure (as shown in the figure). Part 32
It is a.

An opening 36a formed in a clamp link 36 as a clamp member is fitted into the outer periphery of the collet 30, and the inner periphery of the opening 36a extends along the tapered part 32a of the outer periphery of the opening/closing part 32. By moving in the axial direction, the opening/closing operation of the opening/closing section 32 is performed.

That is, by moving the clamp link 36 downward in the drawing, the opening/closing section 32 is opened, and by moving the clamp link 36 upward in the drawing, the opening/closing section 32 is opened. 36a and is operated to close.

The clamp link 36 has one end pivotally connected to the base plate 26 by a pin 38 and the other end of a link lever 40 via a pin 42, and the free end of the clamp link 36 A wire cable 46 is further connected to the free end in the direction in which the compression spring 44 is arranged.

-l The other end of the wire cable 46 is introduced into the vehicle interior (not shown), and when a lever or the like is connected to the end and the driver operates the lever, the wire cable 46 is pulled. It is becoming more and more popular.

A rebound rubber 48a is attached to the upper end of the connecting rod 12 via a back-up body 48.

48a, and a bound rubber 50 is attached to the lower end of the connecting rod 12.

In addition, the above-mentioned clamp link 36 and the above-mentioned link lever 40
An ON/OFF switch 52 for detecting the vertical movement of the clamp link 36 is attached to the pivot point between the clamp link 36 and the clamp link 36.

Furthermore, the rod lock mechanism 24
It is housed in a protective cover 54 fixed to 6, and is protected from flying stones and muddy water.

Therefore, in the variable stiffness device IO configured as described above, when the wire cable 46 is not pulled, the clamp link 36 is set to the upper position by the biasing force of the compression spring 44, and the opening/closing portion 32 of the collet 30 is closed. It is in a state.

Therefore, the claw portion 34 of the collet 30 can engage with the recess 12a of the connecting rod 12, and the claw portion 34 and the recess 1
2a are engaged with each other, the connecting rod 12
The axial movement of is restricted to the collet 30 side, and in turn to the connecting rod support member 20 side via the rubber bushes 22, 22a. Therefore, when the connecting rod 12 is in a restrained state, the torsional force of the stabilizer 16 acts between the vehicle body and the suspension, so the roll rigidity of the vehicle body is set to be large, and the vehicle stability, especially when traveling at high speeds, is significantly improved.

Next, the wire cable 46 is pulled and the clamp link 3 is
6 is moved downward in the figure against the biasing force of the compression spring 44, the opening/closing portion 32 of the collet 30 is operated to open, the claw portion 34 is disengaged from the recess 12a, and the restraint of the connecting rod 12 is released.

Then, the connecting rod 12 is freely moved up and down with respect to the connecting rod support member 20, and the torsional force of the stabilizer 16 is released.

For this reason, the roll stiffness of the car body is small (set, especially
The human force exerted on the vehicle body due to road vibration when driving on rough roads is significantly reduced, and the ride comfort of the vehicle is significantly improved.

By the way, when releasing the restraint of the connecting rod 12, the torsional force of the stabilizer 16 acts on the stove 12 when driving on a rough road, and the downward movement of the connecting rod 12 and the opening operation of the opening/closing part 32 are caused. When these are performed at the same time, the upper step 12b of the recess 12a interferes with the inner periphery of the claw 34 that is about to be removed from the recess 12a.

In this embodiment, a relief portion 56 is formed on the inner periphery of the claw portion 34 to prevent the upper step portion 12b from interfering with the upper step portion 12b.

The shape of the relief portion 56 is determined by the relationship between the opening speed of the opening/closing portion 32 when the claw portion 34 is removed from the recess 12a and the moving speed when the connecting rod 12 is moved downward. ' That is, Fig. 4 shows the opening speed characteristics of the opening/closing part 32 (shown by the solid line).
5(a), the upper step portion 12b is located at the upper end of the claw portion 34. ,
In addition, position B is located at the upper step portion 12 as shown in FIG. 5(b).
b shows a state where the claw portion 34 is located at the lower end.

The area between A and 8 is above the incomplete release range, and in this incomplete release range, the moving speed of the connecting rod 12 is greater than the opening speed of the opening/closing part 32 (indicated by diagonal lines in FIG. 4). 12b and the claw portion 34 interfere with each other.

Therefore, the shape of the relief part 56 needs to be determined so as not to produce the diagonal line part.
As shown in the figure, it is formed as a concave portion curved in the axial direction.

With the above configuration, in the variable rigidity device 10 of the present embodiment, the relief portion 56 is formed on the inner periphery of the claw portion 34, so the opening speed of the collet 30 (the opening speed is determined by the relief portion 56 being formed). The relationship between the opening speed of the inner circumference of the claw portion 34 and the moving speed of the connecting rod 12 is as shown in FIG.
, B, the moving speed of the connecting rod 12 can be prevented from becoming higher than the opening speed of the collet 30.

Therefore, even when the claw 34 is removed from the recess 12a with a downward load acting on the connecting rod 12, the upper step 12b of the recess 12a is prevented from interfering with the inner periphery of the claw 34. can do.

Therefore, the claw portion 34, that is, the collet 30 is forcibly pushed open by the upper step portion 12b, and a stove is generated between the tapered portion 32a on the outer periphery of the opening/closing portion 32 and the opening 36a of the clamp link 36. This allows smooth operation of the rod rotor mechanism 24.

Therefore, the connecting rod 12 can be released from the restraint even when traveling on a rough road, and the range of practical use of the variable stiffness device 10 is significantly increased.

In this case, as shown in FIGS. 6 and 7, the angle θ of the formed end of the relief portion 56 is set to be equal to or greater than the taper angle θ1 formed at the stepped portion of the recess 12a, as shown in FIG. This prevents poor fitting when transitioning from the restrained state to the unrestricted state.

In other words, when θ, θ1, a reaction force of F is generated, and the locking at the relief portion 56 is prevented by 0. >θ, a reaction force F is generated to prevent locking at the relief portion 56.

Furthermore, in the above embodiment, when forming the relief portion 56, the relief portion 56 is formed from the upper and lower ends of the claw portion 34,
Although the case where an acute angle portion is provided at the formed end portion has been shown, as shown in FIG.
By providing the relief portions 56a and 56b, it is possible to prevent wear on both ends of the relief portion 56 as much as possible, thereby preventing malfunctions due to wear.

FIGS. 10 to 13 show other embodiments, in which the same components as in the above embodiment are given the same reference numerals and redundant explanations will be omitted.

That is, in this embodiment, the relief portion 60 is connected to the clamp link 3.
6 is formed in the tapered part 32a of the collet 30 into which the collet 30 is fitted, so that even if the claw part 34 is forcibly pushed open by the upper step part 12b of the recessed part 12a, the tapered part 32a will not interfere with the clamp link 36. By preventing the two from collapsing, fujili between the two can be prevented.

That is, when the opening/closing portion 32 of the collet 30 is closed, the opening 36a of the clamp link 36 is tightly fitted into the tapered portion 32a on the outer periphery, and when the connecting rod 12 is released from this state, As described above, this is done by moving the clamp link 36 downward in the figure, but the opening/closing part 3 is moved by the upper step 12b of the recess 12a.
Even if the tapered portion 2 is forcibly expanded, the tapered portion 32a is formed with a relief portion 60.
Since a gap is provided between a and the clamp link 36, the opening/closing portion 32 can be freely opened.

For this reason, the collet 30 and the clamp link 36
This prevents the occurrence of twisting between the rod lock mechanism 24 and the connecting rod 12, and enables smooth operation even when the rod lock mechanism 24 is released with a downward load acting on the connecting rod 12 as in the above embodiment. .

The ramp link 36 marked rrL-h is rotated around the pin 42 when moving up and down, so the clamp link 36
is operated in an inclined state with respect to the collet 30, and therefore, the position where the connecting rod 12 abuts against the collet 30 differs in the left-right direction in FIG.

The relief portions 60 are formed downward in the figure from the position where the clamp link 36 abuts against the tapered portion 32a at the restraining position of the suspension rod 12.

Incidentally, the relationship between the opening speed of the collet 30 and the moving speed of the connecting rod 12 in this embodiment is as shown in FIG. It is understood that

As shown in FIG. 11 above, the M and N positions shown in the same figure are as shown in FIG. Conventional sawlet opening width AxI shown in Fig. 14
The collet opening width ΔX in this example is x,',x,' as shown in FIG.

When setting X t' + X t', Δx, = x
, ' + x, ' ax, = x , ' + x @', 7Ix.

7Ix becomes very large compared to .

(Effects of the Invention) As described above, in the variable rigidity device for a vehicle stabilizer of the present invention, when the connection rod is released from its restraint, the rigidity variable device for a vehicle stabilizer according to the present invention has a Since the relief part is formed to prevent the upper step part of the recess from interfering with the upper part of the recess, even if the connecting rod starts to move downward as the collet is opened by releasing the restraint of the connecting rod, the claw part will not interfere with the connecting rod. Since there is no interference with the upper step,
It is possible to prevent the collet from being forced open by the connecting rod.

Therefore, it is possible to prevent the occurrence of twisting between both the collet and the connecting rod within the incomplete release range of the variable rigidity device, and it is possible to smoothly perform the restraint release operation.

Further, as another configuration for achieving the present invention, the opening/closing operation of the opening/closing part formed in the collet is performed by a clamp member fitted into a tapered part formed on the outer periphery of the opening/closing part. In this case, a relief part is provided in the tapered part of the collet to prevent the clamp member from interfering with the opening operation of the collet when the connection rod is released from the connection rod. To prevent the clamp member from interfering with the opening/closing part by the escape part even if the connecting rod is forced to enter between the claw parts of the collet and push the collet open when the restraint is released. Therefore, it is possible to prevent the occurrence of stiffness between the two.

Therefore, whereas in the past it was necessary to release the connection rod before entering a rough road, with the present invention, the release operation can be performed even while driving on a rough road. The operability of the variable device is significantly improved, and drivability and ride comfort of the vehicle can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the overall configuration of an embodiment of the present invention, Fig. 2 is a perspective view of a collet used in an embodiment of the present invention, and Fig. 3 is a cross-sectional view taken along the line ■-■ in Fig. 2. Figure 4 is a characteristic diagram showing the relationship between the opening speed of the conventional collet and the moving speed of the connecting port/throat, and Figures 5 (a) and (b) are conventional characteristic diagrams showing the relationship between the opening speed of the collet and the moving speed of the connecting port and throat. An explanatory diagram showing the positional relationship with the upper step, FIG. 6 is a partially enlarged view showing the essential parts of the present invention, and FIG. 7 is the relationship between the angle of the forming end of the relief part and the angle of the step of the recess. FIG. 8 is a characteristic diagram showing the relationship between the opening speed of the collet and the moving speed of the connecting rod of the present invention, FIG. 9 is an enlarged view of main parts showing another embodiment of the present invention, and FIG. 10 to 13 show still other embodiments of the present invention, FIG. 10 is a sectional view of the main part, FIG. 1I is an enlarged sectional view of section E in FIG. 1O, and FIG. 12 is a perspective view of the collet. , Figure 13 is the first
14 is a characteristic diagram showing the relationship between the opening speed of the collet and the moving speed of the connecting rod in the embodiment shown in FIG. 10, and FIG. 15 is the conventional variable stiffness device. FIG. DESCRIPTION OF SYMBOLS 10... Rigidity variable device, 12... Connecting rod (connecting rod), 12a... Recessed part, 12b... E direction part, 16... Stabilizer, 20... Connecting rod support member (support body ), 24... rod lock mechanism, 30...
...This throat, 32...Opening/closing part, 32a...Tapered part, 34...Claw part, 36...Clamp link (
Clamp member), 56.60... relief part. Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (2)

[Claims] (1) A connecting rod that supports the stabilizer on the side of the support body of the vehicle body or suspension, and the support portion of which is movable in the axial direction, and a connecting rod that is provided between the connecting rod and the support body and that is externally fitted onto the connecting rod. At the same time, a radial opening/closing part is formed,
a collet, the claw portion formed on the inner periphery of the opening/closing portion being engaged with a recess formed in the connecting rod by the closing operation of the opening/closing portion to restrain axial movement of the connecting rod; In a rigidity variable device for a vehicle stabilizer that increases roll rigidity by restraining a connecting rod and decreases roll rigidity by releasing the restraint, the collet is provided with an inner periphery of the claw portion of the collet, when the restraint of the connecting rod is released; 1. A variable rigidity device for a vehicle stabilizer, characterized in that a relief portion is formed to prevent the upper step of the recess from interfering with the downward movement of the connecting rod. (2) A connecting rod that supports the stabilizer on the supporting body side of the vehicle body or suspension, and the supporting portion of which is movable in the axial direction, and a connecting rod that is provided between the connecting rod and the supporting body and that is externally fitted onto the connecting rod. At the same time, a radial opening/closing part is formed,
a collet formed on the inner periphery of the opening/closing part that is engaged with a recess formed in the connecting rod by the closing operation of the opening/closing part to restrain axial movement of the connecting rod; Fitted into a tapered part formed on the outer periphery,
and a clamp member that opens and closes the opening/closing section by relative movement in the axial direction of the collet, and increases roll rigidity by restraining the connecting rod with the collet, while decreasing roll rigidity by releasing the restraint. In the variable rigidity device for a stabilizer for a vehicle, the tapered portion of the collet is provided with a relief portion for preventing the clamp member from interfering with the opening movement of the collet when the connection rod is released from the restraint. A variable rigidity device for a vehicle stabilizer, characterized by: