JPH0512264U - Suspension device for automobile seat - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to prevent the bottom feeling even when the upper frame is lowered. [Structure] A damper 1 and an auxiliary link 7 are arranged in a V shape between an upper frame 2 and a lower frame 3, and a slide hole 25 is formed in the upper frame 2 in the horizontal direction. 25, the upper end of the damper 1 is slidably attached, the upper part of the auxiliary link 7 is pivotally attached to the upper end of the damper 1, and the lower part of the auxiliary link 7 is pivotally attached to the lower frame 3. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a suspension device for an automobile seat, which is capable of weight adjustment.

[0002]

[Prior Art]

 As shown in FIG. 5, a conventional vehicle seat suspension system includes a left- and right-hand side between a frame-shaped upper frame 2 on which a seat cushion is mounted and a lower frame 3 fixed to the vehicle floor. There is one in which a pair of X-shaped links 5 ', 6'and an inclined hydraulic damper 1 having a compression support spring 12 wound around the piston rod side are arranged.

[0003]

[Problems to be solved by the device]

However, in such a hydraulic damper 1, when the upper frame 2 is lowered due to the seating of the occupant, the upper end of the hydraulic damper 1 rotates in the fall direction (arrow direction) with the lower end serving as a fulcrum, compared to before the occupant sits down. The inclination angle α ₂ of the hydraulic damper 1 becomes small (the inclination angle of the hydraulic damper 1 before the passenger is seated is α ₁ ). Therefore, the vertical component W ₂ = P ₁ cos θ ₁ of the spring force P ₁ of the compression support spring 12 of the hydraulic damper 1 is reduced and the piston speed and the seating of the hydraulic damper 1 are reduced as compared with the state before the occupant is seated. The repulsive elastic force and the damping force of the spring 12 against the load become small, and there is a possibility that a bottoming feeling may occur. Therefore, an object of the present invention is to prevent the bottoming feeling due to the lowering of the upper frame.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the suspension device for a vehicle seat according to the present invention has the damper and the auxiliary link arranged in a V shape between the upper frame and the lower frame, and the suspension frame is mounted on the upper frame. A slide hole is formed in the horizontal direction, the upper end of the damper is slidably attached to the slide hole, the upper portion of the auxiliary link is pivotally attached to the upper end of the damper, and the lower portion of the auxiliary link is attached to the lower frame. It is characterized by being pivotally attached.

[0005]

[Action]

 When the upper frame descends, the damper rotates in the fall direction with its lower end as a fulcrum, but the upper part of the damper is pivotally attached to the upper end of the auxiliary link, and the upper part of the auxiliary link causes the upper end of the damper to come to the upper frame. Slide along the formed slide holes.

[0006]

【Example】

 An embodiment according to the present invention will be described with reference to FIGS. In the figure, 2 is an upper frame on which a seat cushion is placed, and this upper frame 2 is a frame-shaped frame composed of a front frame member 21, a rear frame member 22, and left and right frame members 23 and 24. The front frame member 21 is located on the front side of the seat cushion. A slide hole 25 is horizontally formed in the right frame member 24 of the upper frame 2 at a substantially central portion thereof. 3 is a lower frame fixed to the vehicle floor. This lower frame 3 is a frame-like frame composed of a front frame member 31, a rear frame member 32, left and right frame members 33 and 34, like the upper frame 2. The front frame member 31 of the lower frame 3 is arranged below the front frame member 21 of the upper frame 2, and the lower frame 3 and the upper frame 2 are a pair of left and right X-shaped links. The upper frame 2 is mounted at 5, 6, 5 ', 6'movably in the vertical direction. A torsion bar (not shown) is provided on the X-shaped links 5 and 6, and the upper frame 2 is biased upward by the elasticity of the torsion bar.

A damper 1 and an auxiliary link 7 are arranged between the upper frame 2 and the lower frame 3 in a V shape. The auxiliary link 7 is formed so that its length is shorter than that of the damper 1. The damper 1 is composed of a hydraulic damper 11 and a coil-shaped compression support spring 12 wound around the piston rod side of the hydraulic damper 11. The lower end 13 of the damper 1 is pivotally attached to the rear of the right frame member 34 of the lower frame 3, and the upper end 14 of the piston rod thereof is slidable in a slide hole 25 formed in the right frame member 24 of the upper frame 2. Installed.

A lower portion 71 of the auxiliary link 7 is pivotally attached to the front portion of the right frame member 34 of the lower frame 3, and an upper portion 72 thereof is pivotally attached to the upper end portion 14 of the damper 1. Since the upper portion 72 of the auxiliary link 7 is tilted toward the damper 1 and pivotally attached to the upper portion 14 of the damper 1, when the upper frame 2 descends, the lower portion 71 of the auxiliary link 7 is used as a fulcrum to support the auxiliary link 7. 7 rotates in the fall direction. That is, as the upper frame 2 of the auxiliary link 7 descends, the link 72 has a half diameter, and the upper portion 72 moves on the circumference around the lower portion 71, so that the upper end portion 14 of the damper 1 is placed in the slide hole 25. It is sliding along the direction of damper 1.

In the suspension device configured as described above, when an occupant sits on the seat cushion, the damper 1 rotates in the fall direction (arrow direction) with the lower end portion 13 as a fulcrum, as shown in FIG. Since the upper end portion 14 of the damper 1 is pivotally attached to the upper portion 72 of the auxiliary link 7, the upper end portion 14 of the damper 1 is attached to the upper frame 2 as the auxiliary link 7 rotates in the fall direction (arrow direction). Slide along the slide hole 25 in the direction of the damper 1 (arrow direction). Therefore, as compared with the case where the upper end portion 14 of the damper 1 is pivotally attached to the upper frame 2 as in the conventional case, the change in the rotation angle of the damper 1 in the fall direction is smaller. That is, the inclination angle α ₂ of the damper 1 is less changed than the inclination angle α ₁ of the damper 1 before sitting. Therefore, when the upper frame 2 descends, the vertical component of the spring force of the compression support spring 12 of the damper 1 does not decrease, the decrease of the piston speed of the damper 1 can be prevented, and the repulsion of the spring 12 against the seating load can be prevented. Since it is possible to prevent a decrease in elasticity and a decrease in damping force of the damper 1, it is possible to prevent the occurrence of a bottoming feeling. Further, even if the upper frame 2 is lowered, it is possible to prevent the occurrence of a bottoming feeling, so that the lowermost position of the upper frame 2 can be made lower than in the conventional case. Therefore, the vertical movement range of the upper frame is widened. Further, since the function of the piston rod and the like of the damper 1 can be prevented from being deteriorated, the damper 1 can be downsized. If the length of the auxiliary link 7 is longer than the length of the damper 1, the damper 1 gradually rotates in the standing direction as the upper frame 2 descends, and the inclination angle of the damper 1 increases, so that the damper 1 increases. The vertical component of the spring force of 1 increases, the piston speed increases, and the damping force of the damper 1 increases.

[0010]

[Effect of the device]

 According to the present invention, the damper and the auxiliary link are arranged in a C-shape between the upper frame and the lower frame, and the upper end of the damper is slidably mounted in the horizontal slide hole formed in the upper frame. Furthermore, since the upper part of the auxiliary link is pivotally attached to the upper end of the damper, when the upper frame descends, the auxiliary link and the damper rotate in the fall direction, but the upper end of the auxiliary link moves to the lower end. It moves on the circumference with the length of the link as the center and the diameter. Therefore, since the upper end of the damper slides along the slide hole, it is possible to reduce the change in the inclination angle of the damper, prevent the spring reaction force, piston speed, and damping force of the damper from decreasing, and the bottom It is possible to prevent the generation of feeling.

[Brief description of drawings]

FIG. 1 is a perspective view of a suspension device according to the present invention.

FIG. 2 is a side view of the suspension device shown in FIG.

FIG. 3 is a side view of the suspension device shown in FIG. 1 in a state where an upper frame is lowered.

FIG. 4 is a side view showing a state in which the auxiliary link and the damper rotate in the fall direction when the upper frame descends in the suspension device shown in FIG.

FIG. 5 is a partial side view of a conventional suspension device.

[Explanation of symbols]

 1 damper 2 upper frame 3 lower frame 5, 6, 5 ', 6'X-shaped link 7 auxiliary link 25 slide hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kojiro Nagata, 3-12-12 Matsubara-cho, Akishima-shi, Tokyo Inside Tachi-S Co.

Claims (1)

[Scope of utility model registration request] 1. An automobile seat suspension comprising an X-shaped link and a damper arranged between a frame-shaped upper frame on which a seat cushion is placed and a lower frame fixed to the vehicle floor. In the device, the damper and the auxiliary link are arranged in a V shape between the upper frame and the lower frame, and a slide hole is formed in a horizontal direction in the upper frame, and the damper is provided in the slide hole. An upper end of the auxiliary link is slidably mounted, an upper part of the auxiliary link is pivotally attached to an upper end of the damper, and a lower part of the auxiliary link is pivotally attached to the lower frame.