JPH0223883Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cushion plate that is incorporated into a tail cab support device, a bonnet support device, etc. of a freight vehicle.

For example, an automobile cab support device 1 elastically supports a cab 3 on a vehicle body frame 2, as shown in FIG. connect,
The other end of the rod 5 is connected to a stay 7 erected on the vehicle body frame to restrict the longitudinal displacement of the cab 3.

Note that the vertical displacement is buffered by a spring 8 or the like.

However, it is desirable that the stay 4 and the rod 5 slide smoothly relative to each other in order to prevent vibrational displacement from the body frame 2 from being transmitted to the cab 3, but since the cab 3 is quite heavy, It is difficult to achieve smooth sliding without causing play between the two supporting parts.

Therefore, as shown in FIG. 2, a cushion plate 9 has been conventionally interposed between the inner end surface 4a of the stay 4 and the outer end surface 5a of the rod 5 to fill the space between both members and to 5 is transmitted to the stay 4 while being buffered. As shown in FIG. 3, this cushion plate 9 has a structure in which rubber 11 is vulcanized and adhesive-molded between a pair of steel plates 10, 10, and a synthetic resin thrust washer is further installed between the cushion plate 9 and the stay 4. ,
A thrust spacer made of galvanized steel is incorporated to improve the riding comfort of the cab 3.

However, since the cushion plate 9 has metal plates on both sides, it has a high coefficient of friction, and even if it is plated, if it wears away, it is likely to cause corrosion. If this corrosion occurs, the coefficient of friction will increase, making it difficult to operate smoothly. It will be missing. Moreover, if the amount of friction increases due to this friction coefficient, there is a possibility that backlash may occur.

Furthermore, such a configuration is heavy due to the use of metal, and the processing process requires plating, punching, and
It is disadvantageous in terms of cost because it involves a wide range of applications such as vulcanization and adhesion.

Further, since the cushion plate 9 has a constant width l, a washer plate, a spacer plate, etc. may be required.

The present invention was developed in view of the above-mentioned drawbacks, and it copes with various loads and deformations by appropriately changing the spring constant, and is also advantageous in terms of manufacturing, assembly, and cost. Its purpose is to provide a cushion plate that is characterized by its ability to fill the space created between a pair of movable bodies through which a support shaft passes, and to prevent the movement of one movable body from affecting the other. A cushion plate for buffering transmission includes a boss portion having a center hole through which the support shaft is inserted, and an outer surface and an inner surface extending outward from a plane S formed by the outer surface of the boss portion, and the inner surface is
A thrust plate that protrudes outward from the plane formed by the inner surface of the boss and has a plate thickness that becomes thinner toward the tip, and a plurality of slits formed in the radial direction that divide this thrust plate into a plurality of fan-shaped pieces. and is entirely made of synthetic resin.

An embodiment of the present invention will be described below with reference to the drawings.

However, for convenience of the following explanation, FIGS. 1 and 2 will be referred to.

FIG. 4 is a front view of the cushion plate according to the present invention, and FIG. 5 is a sectional view taken along the line - in FIG. 4. Cushion plate 2 shown in FIG.
As shown in FIGS. 4 and 5, 0 consists of a pair of synthetic resin dish-shaped discs, and includes a boss part 22 with a center hole 21 in the center through which the support shaft 6 is inserted, and a radius from this boss part 22. It has a thrust plate portion 23 that is formed to become gradually thinner toward the outside.

As shown in FIG. 5, this thrust plate portion 23 protrudes outward with respect to a plane S constituted by the outer surface of the boss portion 21, and when the cushion plate 20 is interposed between the stay 4 and the rod 5, This is to enable the thrust plate portion 23 to cope with various loads and deformations by appropriately changing the spring constant.

The cushion plate 20 may be used alone in the form of a plate, or in combination with two or more plates as shown in FIG.

In particular, as is clear from FIG. 5, this thrust plate portion 23 has a relatively thick wall thickness _l1 near the boss portion 22, gradually becomes thinner toward the outer periphery, and has a wall thickness _l2 at the tip. It's becoming less relevant.

The reason why the cushion plate 20 is formed into a tapered shape is that when the cushion plate 20 is inserted between the stay 4 and the rod 5, the space between the two cannot be precisely measured and installed. It is.

In other words, both the stay 4 and the rod 5 support the support shaft 6.
Since it is not fixed at a predetermined position and is always displaced, the installation space is not constant, but even in such a case, if it is tapered, the load generated between the stay 4 and the rod 5 can be reduced. Alternatively, the spring constant of the cushion plate 20 is adjusted in response to the amount of deformation due to torsion, etc., and a predetermined elastic force is always exerted between the stay 4 and the rod 5 without using a thrust washer or the like. It becomes possible to do so. However, if this space is too large, 22 or more sheets may be used back to back as shown in FIG.

Further, since this cushion plate 20 is molded from synthetic resin, it can be said that it has achieved better wear resistance and a lower coefficient of friction than conventional products. Examples of the synthetic resins used here include thermoplastic resins such as polyamide and polyacetal, and thermosetting resins such as phenolic resin and polyester.

In order to mold the cushion plate 20 using this thermoplastic resin, it is performed by injection molding, and when using a conventional thermosetting resin, two steps are required: preforming and heat curing molding. Compared to conventional products, the number of steps involved in molding is extremely small, and product costs can be reduced accordingly.

However, in order to further enhance the wear resistance, it is preferable to disperse a solid lubricant (for example, molybdenum disulfide, graphite, boron nitride, silicon nitride, silicon carbide, etc.) in this synthetic resin.
In this way, the solid lubricant is worn away, and it is possible not only to reduce the wear resistance and friction coefficient of the cushion plate 20, but also to improve the mechanical strength.

In particular, with this configuration, not only is there no need for plating for anti-corrosion and anti-friction effects as in conventional products, but it also exhibits a self-lubricating effect, buffers the movement of the rod 5, and prevents the stay 4 from moving. This results in extremely good cabin ride comfort.

However, in order to improve the buffering force against the force in the axial direction of the support shaft 6, as is clear from FIG. The thrust plate 23 is divided into a plurality of fan-shaped pieces. By dividing the thrust plate 23 into a plurality of fan-shaped pieces, the amount of elastic deformation of each fan-shaped piece increases, the buffering force in the axial direction of the support shaft 6 increases, and the thickness of the thrust plate 23 tapers toward the tip. Because of its shape, the fan-shaped piece deforms to fit the contact surface, and together with the fan shape of the fan-shaped piece, the contact area is large. Therefore, even if the load in the thrust direction increases, the increase in surface pressure can be suppressed to a low level.

Therefore, the self-lubricating property of the thrust plate 23,
Low surface pressure provides wear resistance against rotational movements.

Furthermore, by interposing or mixing fibers such as glass fibers and carbon fibers into the synthetic resin constituting the cushion plate 20, the mechanical strength of the cushion plate can be strengthened without increasing its weight.

If the molded cushion plate 20 is inserted between the stay 4 and the rod 5 in this way,
Even if the space between the two is not measured in advance or is inserted, the thrust plate portion 23 deforms and presses the stay 4 and the rod 5 with a predetermined elastic force. Next, when the vehicle runs, vibrations from the body frame 2 are transmitted to the rods 5, but the movement, displacement, and deformation of the rods 5 are all buffered by the smooth rotational deformation of the cushion plate 20. 4, and the cabin is held with good riding comfort.

Although the above-mentioned embodiment applies the cushion plate to an automobile cab support device, the present invention is not limited to this in any way.
Needless to say, it can be used in machine tools or various operating devices.

As is clear from the above description, according to the present invention, a boss portion having a center hole through which the support shaft is inserted, and a thrust plate portion formed to have a thinner wall gradually outward in the radial direction from the boss portion. Since the entire body is molded into a dish-shaped synthetic resin, it fills the space between the movable bodies without using washers, reduces the friction that occurs between the two movable bodies, and is suitable for use in automobile cab support devices, bonnet support devices, etc. When used in a car, it is possible to create a cab with a comfortable ride, and the bonnet can be opened and closed smoothly.It is also extremely easy to manufacture this cushion plate, and costs can be reduced. Moreover, it is possible to obtain a product with excellent corrosion resistance and abrasion resistance.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the vehicle cab support system;
3 is an enlarged sectional view of the conventional cushion plate shown in FIG. 2, FIG. 4 is a front view of the cushion plate according to the present invention, and FIG. 5 is a sectional view of the main part of FIG. FIG. 4 is a sectional view taken along the - line in FIG. 4; 4... Stay, 5... Rod, 6... Support shaft,
20...Cushion plate, 21...Center hole,
22...Boss part, 23...Thrust plate part,
24...Slit.

Claims (1)

[Scope of utility model registration request] In a cushion plate that fills a space created between a pair of movable bodies through which a support shaft is inserted and buffers transmission of the motion of one movable body to the other, a boss portion having a center hole through which the support shaft is inserted. The outer surface and inner surface of the boss extend outwardly from the plane S formed by the outer surface of the boss, and the inner surface projects outward from the plane S formed by the inner surface of the boss, and the plate thickness becomes thinner toward the tip. A cushion plate that is made entirely of synthetic resin and has a thrust plate that has a radial shape and a plurality of slits formed in the radial direction that divide the thrust plate into a plurality of fan-shaped pieces.