JPH059206Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a stabilizer for a vehicle that can change the roll stiffness of a vehicle body depending on the running condition of the vehicle.

Conventional technology As a stabilizer for this type of vehicle, JP-A-57-
Some are described in Publication No. 66009.

This is a stabilizer device in which both ends of a U-shaped stabilizer rotatably attached to the vehicle body are connected to suspension arms that support left and right wheels, respectively, and the stabilizer is partially divided into left and right parts. , a piston is attached to one side and a cylinder is attached to the other side, and the two are slidably connected, and a fluid such as oil is sealed in both cylinder chambers formed by the piston rod and cylinder, and both cylinder chambers are bypassed. A switching valve is provided in the middle of this bypass passage to allow the two cylinder chambers to communicate or become independent using hydraulic pressure of the power steering, and the left and right suspension arms are connected to each other by communication or independence between the two cylinder chambers. The stabilizer function is configured to be uncoupled or connected, so that the stabilizer function is not activated when driving straight, improving ride comfort when driving straight, and when turning, the stabilizer function is activated when turning, improving turning performance when turning. It's getting old.

Problems to be Solved by the Invention By the way, the conventional vehicle stabilizer described above uses a hydraulic cylinder to switch the torsional rigidity of the stabilizer, and therefore has the following problems.

(1) Since the torsional rigidity of the stabilizer is switched by the hydraulic pressure of the power steering, the structure would be extremely complicated if this was applied to a four-wheel drive vehicle.

(2) If oil leaks due to deterioration of the sealing material of the hydraulic cylinder, the performance of the hydraulic cylinder will deteriorate, making it impossible to increase the roll rigidity of the vehicle body, resulting in poor reliability.

(3) The unsprung weight of the vehicle increases.

The present invention has been made for the purpose of solving the above-mentioned conventional problems.

Means to solve the problem A rod lock device is used to prevent the vertical movement of the connecting rod and increase (switch) the roll rigidity of the car body.The rod lock device has an engaging protrusion on the inner periphery of the upper end, and the lower end is used for rod fitting. The connecting rod is placed on the outer periphery of the connecting rod while being fixed to the upper end of the cylindrical body of the connecting rod. A collet that prevents the vertical movement of the collet, and a collet that is fitted to the outer periphery of the collet so as to be movable vertically.
a collet tightening cylindrical body which, when pushed upwards on the collet, engages the inner circumferential surface of the collet receiving hole with the inclined surface on the outer circumference of the collet, tightening the collet and fitting the engaging protrusion into the recess; It is composed of a coil spring that pushes the tightening cylinder upward and uses the cylinder to tighten the collet, and a cylinder pushing down mechanism that pushes down the collet tightening cylinder against the spring force of the coil spring. .

Function: The collet tightening cylinder is pushed up above the collet by the spring force of the coil spring, presses the inclined surface on the outer circumference of the collet with the inner circumferential surface of the collet receiving hole, and engages the engaging protrusion provided on the inner circumferential surface of the collet. fitting into the concave part of the conrod so as to sandwich the conrod from the radial direction to prevent upward and downward movement of the conrod,
In other words, it locks the stove. Also, from this state, when the barrel pushing mechanism pushes down the collet tightening cylinder against the spring force of the coil spring, the collet, which is released from the tightening by the collet tightening cylinder, expands in diameter and the engaging protrusion comes out of the recess. The upper and lower movements of the cooking stove are released, that is, the cooking stove is placed in an unlocked state and the cooking stove is allowed to move up and down.

Embodiment Next, a stabilizer for a vehicle according to the present invention will be explained with reference to the drawings. Reference numerals 1 and 1 denote connecting rod support members, and these connecting rod support members 1 and 1 are arranged at appropriate intervals in the left-right direction of the vehicle body. 2,
2 is a cooking rod, and these cooking rods 2, 2
is attached to the connecting rod support members 1, 1 so as to be movable up and down. 3 is a torsion bar;
The torsion bar 3 has a pair of left and right side pieces 3a, 3b.
and a connecting piece 3c that connects these side pieces 3a and 3b.
The side piece 3 is formed into a U-shape by
The tips of a and 3b are pivoted to the lower ends of the connecting rods 2 and 2 by brackets 4 and 4, and the left and right sides of the connecting piece 3c are rotatable to suspension members 5 and 5 such as suspension arms. is supported by Reference numerals 6 and 6 denote cylinders for fitting connecting rods attached to the connecting rod supporting members 1, 1. A protruding flange 6a is provided at the upper part of these cylinders 6, 6, and a male thread 6b is formed on the upper outer periphery of the flange 6a, and a recessed part 6c is formed on the upper surface of the flange 6a. has been done. Also, the outer periphery of the lower end of the cylinders 6, 6 has a male thread 6d.
is formed. Then, between the nut 7 screwed onto the male screw 6d and the flange 6a, the upper and lower rubber bushes 8, 8 and the upper and lower washers 9, 9, which are disposed on the upper and lower surfaces of the connecting rod support members 1, 1, are sandwiched. These cylindrical bodies 6, 6 are attached to the connecting rod support members 1, 1, and connecting rods 2, 2 are fitted therein so as to be movable up and down. Reference numerals 10 and 10 indicate guide bushes that are press-fitted into the upper and lower ends of the cylindrical bodies 6 and 6 to smooth the vertical movement of the connecting rod 2, and 11 indicates a seal ring that is attached to the inner periphery of the nut 7. 11 prevents lubricating oil from leaking into the lower dust cover 12 when lubricating oil is sealed between the guide bush 10 and the connecting rod 2. A dust cover band 13 fastens the upper end of the lower dust cover 12 to a dust cover bracket 14, and the dust cover bracket 14 is held between the nut 7 and the lower washer 9.
15 is a dust cover holder to which the lower end of the lower dust cover 12 is attached; 16 and 17 are rebound stop levers and bound stop levers attached to the top and bottom of the cooking rod 2;
The rebound stop lever 16 is glued to a rubber back-up body 18, which is secured to the upper part of the cooking rod 2 with a nut 19.

Reference numeral 20 denotes a rod locking device, which has an engaging convex portion 21a on the inner periphery side and is disposed on the outer periphery of the connecting rod 2. By fitting the convex portion 21a into the connecting rod 2
A collet 21 is fitted to the outer periphery of the collet 21 so as to be movable vertically, and when the collet 21 is pushed upward, the collet receiving hole 2
The inner circumferential surface of 2a is the inclined surface 21 of the outer circumference of the collet 21.
b, tightens the collet 21, and fits the engaging protrusion 21a into the recess 2a of the connecting rod 2; Coil spring 2 tightening the collet 21 with the body 22
3, and a cylindrical body pushing down mechanism 24 that pushes down the collet tightening cylindrical body 22 against the spring force of this coil spring 23.

The collet 21 includes a cylindrical base portion 21c whose inner diameter is larger than the diameter of the connecting rod 2, and a pair of left and right arc-shaped spring plate portions 21d and 21e connected to the upper portion of the base portion 21c. A pair of engaging convex portions 21a, 21a are formed on opposing inner peripheral surfaces of the spring plate portions 21d, 21e with a spacing d slightly larger than the diameter of the connecting rod 2. has been done. Then, the cylindrical base 21c is inserted into the recess 6 of the flange 6a.
c, and press the base 21c with the collar 25, and press the collar 25 with the nut 26 screwed onto the male thread 6b of the flange 6a.
The spring plate portion 21d,
When the outer peripheral side of 21e is pressed, these spring plate parts 2
1d and 21e are bent, and engaging protrusions 21a and 21a provided on their inner peripheral surfaces fit into the recess 2a of the connecting rod 2, thereby preventing the connecting rod 2 from moving up and down.

The collet tightening cylinder 22 is formed into a cylindrical shape with a lid, and a collet receiving hole 22a is provided in the center of the lid portion 22b. By using the collet receiving hole 22a, the collet tightening cylinder 22 is fitted to the outer periphery of the collet 21 so as to be able to move up and down, and when it is pushed up above the collet 21, the inner circumferential surface of the collet receiving hole 22a is It comes into contact with the inclined surface 21b on the outer periphery of the collet 21, tightens the collet 21, and aligns the engaging convex portion 21a with the concave portion 2 of the connecting rod 2.
It is designed to fit into a.

The coil spring 23 is elastically mounted between the lower surface of the lid portion 22b of the collet tightening cylinder 22 and the base portion 27 fixed to the flange 6a of the connecting rod fitting cylinder 6. Push up the collet tightening tube 22 above the collet 21 and tighten the collet tightening tube 22.
It has the effect of tightening the

Further, the cylindrical body pushing down mechanism 24 includes the base portion 2
7, a lever receiving part 24a provided upright, and a disk 24c, one end of which is pivotally supported by a pin 24b at the upper end of the lever receiving part 24a, and provided on both sides of the central part.
A cylinder pressing lever 24 that presses both sides of the upper surface of the lid part 22b of the collet tightening cylinder 22 with its lower end 24e.
d, and a coil elastically loaded between the spring receiving part 24e provided on the lower surface of the other end of the cylindrical pressing lever 24d and the base part 27, and pushing up the other end of the cylindrical pressing lever 24d. Spring 24f
, a wire cable 24i whose one end is fixed to a wire receiving part 24g provided at the other end of the cylindrical pressing lever 24d by a wire entrant 24h, and whose other end extends to the driver's seat side; It is connected to the end of the cable 24i on the driver's seat side,
It consists of a cable operation section 24j that pulls and operates the wire cable 24i. When the wire cable 24i is pulled by the cable operating section 24j, the barrel pressing lever 24d rotates clockwise, and the lower ends of the discs 24c and 24e push down the collet tightening barrel 22. Collet 21 is beginning to loosen its grip.

Note that 28 is a cover that is attached to the base portion 27 and covers the cylindrical pressing lever 24d, etc., 29 is a cover band that attaches the cover 28 to the base portion 27, and 30 is a dust cover receiving portion on the upper part of the cover 28. 28a is an upper dust cover attached to the dust cover band 31, and the upper dust cover 30 and the lower dust cover 12 are communicated with each other through a communication pipe (not shown).

Next, the operation of the above rod lock device 20 will be described. Unless the wire cable 24i is pulled by the cable operation part 24j of the cylinder pushing down mechanism 24, the collector pulling cylinder 22
3, the collet 21 is kept pushed upward by the inner circumferential surface of the collet receiving hole 22a, and the engaging convex portions 21a, 21a provided on the inner circumferential surfaces of the spring plate portions 21d, 21e tighten. stove rod 2
It is fitted into the recess 2a. By preventing the vertical movement of the connecting rod 2 in this manner, the stabilizer functions, so that the roll rigidity of the vehicle body is increased and the turning performance of the vehicle is improved. In addition, the wire cable 24i is connected to the cable operating section 24j.
When pulled, the cylindrical pressing lever 24d rotates clockwise, and the discs 24c and 24c provided on both sides of the central part rotate
The lower end of 24c is the lid part 22 of the collet tightening cylinder 22.
b comes into contact with both sides of the upper surface of the coil spring 23, and pushes it down against the spring force of the coil spring 23. Therefore, the collet 21 is released from the clamping by the collet clamping cylinder 22, so that the spring plate portion 2 of the collet 21 is released.
1d and 21e return to their original positions (diameter enlarged) by their own spring force, and the engaging protrusion 21a is connected to the connecting rod 2.
from the recess 2a. For this reason, stove 2
is in a state where it can move up and down, and the stabilizer does not function, so the roll stiffness of the vehicle body is reduced, improving ride comfort when the vehicle is traveling straight.

In this embodiment, the rod lock device 20 is attached to both connecting rods 2, but the rod lock device 20 is attached to one connecting rod 2,
The other connecting rod 2 may be fixed to the connecting rod support member 1.

Effects of the Invention As explained above, the present invention connects at least one end of a torsion bar to a connecting rod that is vertically movably supported by a connecting rod support member on the body side or suspension side of a vehicle, and this connecting rod has the following features:
In a vehicle stabilizer whose vertical movement is prevented by a rod lock device, the rod lock device has an engaging convex portion on the inner periphery of the upper end side, and the lower end side is connected to the upper end of the cylinder for rod fitting, etc. A collet is fixedly placed on the outer periphery of the cooking rod and prevents vertical movement of the cooking rod by fitting the convex part into a recess provided on the circumferential surface of the cooking rod, and a collet that prevents vertical movement of the cooking rod. When the collet is pushed down above the collet, the inner circumferential surface of the collet receiving hole engages with the inclined surface on the outer circumference of the collet, tightening the collet, and fitting the engaging protrusion into the recess. A collet tightening cylindrical body, a coil spring which pushes the collet tightening cylindrical body upward, and a coil spring which uses the outer cylinder body to tighten the collet, and pushes down the collet tightening cylindrical body against the spring force of the coil spring. Since it is composed of a cylindrical body pushing down mechanism, it has the following effects.

(1) A collet is used, and the engaging protrusion provided on the inner circumference of the collet fits into the recess provided on the circumferential surface of the connecting rod to prevent vertical movement of the connecting rod, so the operation of conventional power steering is improved. The structure is simpler than the one that prevents the vertical movement of the connecting rod using hydraulic pressure, and it is particularly easy to apply to four-wheel drive vehicles.

(2) Since a hydraulic cylinder or the like is not used, there is no reduction in the roll rigidity of the vehicle body due to oil leakage from the hydraulic cylinder, making it possible to improve the reliability of the rod lock device.

(3) Since the structure is simpler than when using a hydraulic cylinder, it is possible to suppress an increase in the unsprung weight of the vehicle.

(4) The structure of the rod lock device can be simplified because the collet is tightened or released by moving the collet tightening cylinder up and down.

(5) Since the collet locks the conrod by holding it in the radial direction, deflection of the conrod can be eliminated and the conrod can be reliably locked.

(6) When the collet tightening cylinder is pushed up above the collet, the inner circumferential surface of the collet receiving hole engages with the inclined surface on the outer periphery of the collet, tightening the collet, and when the collet tightening cylinder is pushed down below the collet. Since the inner circumferential surface of the collet receiving hole and the inclined surface on the outer circumferential surface of the collet are disengaged from each other, the tightening of the connecting rod is released. By moving the collet up and down, the collet can be reliably tightened and untightened.

Furthermore, since the collet tightening cylinder can tighten the collet evenly from the radial direction,
No biasing force or the like is applied to the collet during tightening, and uneven wear between the engaging protrusion and the recess can be effectively prevented.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the vehicle stabilizer of the present invention, Fig. 2 is a sectional view of the collet in a pressed state,
FIG. 3 is a side view of the barrel-pushing mechanism, and FIG. 4 is a perspective view of the collet. DESCRIPTION OF SYMBOLS 1... Connecting rod support member, 2... Connecting rod, 2a... Recess, 3... Torsion bar, 20
...Rodlock device, 21...Collection, 21
a... Engaging convex portion, 22... Collet tightening cylinder, 2
3...Coil spring, 24...Cylinder body pushing down mechanism.

Claims (1)

[Scope of utility model registration request] Connecting at least one end of the torsion bar to a connecting rod that is vertically movably supported by a connecting rod support member on the vehicle body side or suspension side of the vehicle,
In this vehicle stabilizer, the connecting rod is prevented from moving up and down by a rod lock device. It is arranged on the outer periphery of the conrod while being fixed to the upper end, etc., and the convex part is fitted into a recess provided on the circumferential surface of the conrod so as to sandwich the conrod from the radial direction, thereby controlling the vertical movement of the conrod. A collet is fitted to the outer periphery of the collet so as to be movable up and down, and when the collet is pushed upward, the inner circumferential surface of the collet receiving hole engages with the sloped surface of the outer periphery of the collet, tightening the collet. a collet tightening cylinder for fitting the engaging protrusion into the recess; a coil spring for pushing the collet tightening cylinder upward and tightening the collet by the cylinder; 1. A stabilizer for a vehicle, comprising: a cylindrical body pushing down mechanism that pushes down the collet tightening cylindrical body against a spring force.