JPH0436983Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a seat cushioning device that alleviates shocks and vibrations transmitted from a vehicle to a seat.

(Prior Art and Problems to be Solved) Some conventional seat shock absorbers include a spring that absorbs shock and a damper that absorbs vibration.

However, in the case of a shock absorbing device that uses springs and dampers interposed between the seat and the vehicle body, it is necessary to provide a link mechanism to prevent the seat from tilting, which increases the number of parts that make up this link mechanism and increases the weight. There was a problem in that it led to an increase in costs and costs.

The present invention aims to solve these conventional problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a seat shock absorber in which a spring and a damper are interposed between the vehicle body and the seat, in which two pipes are curved into a U-shape. A U-shaped tube is formed, and each U-shaped tube has two link portions extending in parallel and an arm portion connecting these two link portions, and the center portions of the link portions of each U-shaped tube are overlapped with each other. , a central axis passing through the central part is provided, one end of the damper is connected to this central axis, two sub-links are rotatably connected to the other end of the damper, and each U-shape is connected to the vehicle body and the seat. A guide hole was formed in which the tip of the link of the tube and the tip of each sub-link were pivotally supported, and the arm of each U-shaped tube was slidably inserted therethrough.

(Function) A pair of X-shaped link mechanisms are constructed by rotatably connecting the link portions of each U-shaped tube through a central axis, which functions to move the seat in parallel with the vehicle body. As the seat moves up and down, the damper expands and contracts via each sub-link and central shaft.

By configuring the pair of X-shaped link mechanisms with two pipes, sufficient rigidity can be ensured and the number of parts can be reduced.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

As shown in Fig. 1A, Fig. 1B, and Fig. 1C, a box-shaped lower case 1 and an upper case 2 are provided, which overlap each other, and the lower case 1 is attached to the vehicle body side, and the upper case 2 is used for operation. A seat is constructed by attaching a cushion 4 for seating a person.

Four coil springs 3 are interposed at each corner between the lower case 1 and the upper case 2.

Two U-shaped pipes 5 and 6 are created by curving the pipe into a U-shape.
Each U-shaped tube 5, 6 has link portions 5C, 6C parallel to each other, and arm portions 5D, 6D connecting both link portions 5C, 6C.

Center portion 5 of link portions 5C and 6C of U-shaped tubes 5 and 6
b, 6b are superimposed on each other, and the central portion 5b,
A pair of X-shaped link mechanisms are constructed by passing one central shaft 11 through 6b and rotatably connecting the link parts 5C and 6C to each other.

The U-shaped tube 5 rotatably connects the tip 5a of each link portion 5C to the lower case 1 via one shaft 7, while the tip 6a of each link portion 6C of the U-shaped tube 6 is connected to the lower case 1 via one shaft 7. It is rotatably connected to the upper case 2 via a shaft 8. The shafts 7, 8 are supported by brackets 9, 10 provided to sandwich the respective tip ends 5a, 6a.

Guide 1 is installed in lower case 1 and upper case 2 respectively.
2, 13 are installed, guide holes (elongated holes) 12A, 13A are formed horizontally in these guides 12, 13, and U-shaped tubes 5, 6 are formed in these guide holes 12A, 13A.
The respective arm portions 5D and 6D are inserted therethrough.

Sliders 14 and 15 are attached to the arm portions 5D and 6D of the U-shaped tubes 5 and 6, respectively, and the sliders 14 and 15 are brought into sliding contact with the inner wall surface 1A of the lower case 1 and the inner wall surface 2A of the upper case 2.

A damper 17 is provided to damp vibrations of the spring 3, and the damper 17 is designed so that oil sealed in the cylinder 23 generates flow resistance as a rod 24 protruding from the cylinder 23 is displaced.

The damper 17 has its cylinder base end 23A fitted onto the central shaft 11, and its rod tip 24A connected to sub-links 18 and 19 via the shaft 20. The shafts 7 and 8 are connected to the lower case 1 and the upper case 2, respectively, via the shafts 7 and 8.

The guides 21 and 22 are attached to the damper 1 in the lower case 1.
Attach the cylinder 23 of No. 7 between them.

In addition, the bracket 9, guides 12, 21, 2
2 and an annular protrusion 25 on which the spring 3 is seated are integrally formed in the lower case 1 by punching or the like.

With this configuration, the operation will be explained next.

When a shock is transmitted from the vehicle body, the spring 3 contracts and absorbs the shock. At this time, the link parts 5C and 6C rotate about the central axis 11 while sliding the sliders 14 and 15, and the upper Case 2 is lowered parallel to lower case 1. At the same time, the sub-links 18 and 19 also rotate, causing the damper 17 to extend between it and the shaft 20.

When the spring 3 expands due to its elastic restoring force, as the link parts 5C and 6C rotate about the central axis 11, the arm parts 5D and
6D is guided in the horizontal direction by the guide holes 12A and 13A, so the upper case 2 is raised parallel to the lower case 1. At this time, sublink 18,
19 also rotates and contracts the damper 17 between it and the shaft 20 to absorb vibrations.

In this way, since the two U-shaped tubes 5 and 6 form a pair of X-shaped link mechanisms, sufficient rigidity is ensured and the number of parts can be reduced.

(Effects of the invention) As described above, according to the invention, in a seat shock absorbing device in which a spring and a damper are interposed between the vehicle body and the seat, two U-shaped pipes are formed by curving the pipe into a U-shape. , each U-shaped tube extends in parallel 2
It has a link part of the book and an arm part that connects both link parts, and the center part of the link part of each U-shaped tube is overlapped with each other, and a center axis passing through this center part is provided, and the damper is attached to this center axis. One end is connected, two sub-links are rotatably connected to the other end of the damper, and the link tip of each U-shaped tube and the tip of each sub-link are respectively pivotally supported on the vehicle body and the seat. At the same time, guide holes were formed through which the arms of each U-shaped tube could be slidably inserted, so by using U-shaped tubes, sufficient rigidity of the link mechanism was ensured, and the weight was reduced by reducing the number of parts. Or, it can make assembly work easier and contribute to cost reduction.

[Brief explanation of the drawing]

FIG. 1A is a cross-sectional view showing an embodiment of the present invention, FIG. 1B is a cross-sectional view taken along the line XX in the same figure, and FIG. 1C is a cross-sectional view taken along the line Y-Y in the same figure. 1...Lower case, 2...Upper case, 3...Spring, 4...Cushion, 5, 6...U-shaped tube,
5C, 6C...Link part, 5D, 6D...Arm part, 5a, 6a...Tip part, 5b, 6b...Central part, 7, 8...Shaft, 11...Central axis, 12A, 1
3B...Guide hole, 14,15...Slider,
17...Damper, 18,19...Sublink,
20... Axis.

Claims (1)

[Scope of utility model registration request] In a seat shock absorbing system that uses a spring and a damper between the vehicle body and the seat, the pipe is
It is curved into a letter shape to form two U-shaped tubes, and each U-shaped tube has two link sections extending in parallel and an arm section connecting these two link sections. The central parts of the parts are overlapped with each other, and a central axis passing through the central part is provided, one end of the damper is connected to this central axis, and two sub-links are rotatably connected to the other end of the damper, The vehicle body and the seat are characterized by forming guide holes in which the link tip of each U-shaped tube and the tip of each sub-link are respectively pivotally supported, and through which the arm portion of each U-shaped tube is slidably inserted. A shock absorber for seats.