JPS5819369Y2 - linear washer - Google Patents

Description

[Detailed description of the invention] This invention relates to a linear washer made of wire, and in particular,
The present invention relates to a linear washer that is preferably interposed between two members that rotate relative to each other.

In general, in various link systems, steel, non-ferrous materials, plastics, resins, A flat washer or spacer made of etc. is incorporated.

However, if so-called dust such as dust or foreign matter adheres or accumulates on the sliding part of the lever in which such a washer is installed and enters the inside between the sliding parts,
There is a problem in that the sliding resistance of the lever in the link system increases significantly due to rolling resistance or catching of dust.

This idea was made in view of the above-mentioned conventional problems, and it is a linear washer that can reduce the adhesion and accumulation of dust on the washer seating part and improve the operability of the lever in the link system. The purpose is to provide.

The linear washer according to this invention is interposed between two relatively rotating members, and at least on the side of the contact portion with one of the members,
A plurality of protrusions are formed.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIGS. 1A and 1B are explanatory diagrams showing one embodiment of the linear washer according to this invention.

The linear washer 10 is formed from an elastic wire having a wire diameter d, and forms a spiral wire shape from a base end 11, a distal end 12, and an intermediate part 13.

The base end portion 11 has a large diameter ring shape, and the ring diameter B
is set to match the size of the support surface of the bearing or part of the lever to be seated.

The tip portion 12 has a small diameter ring shape, and the ring diameter C
is set to a size that allows the linear washer 10 to fit into the outer diameter of the shaft portion through which it is inserted.

The intermediate portion 13 connects the proximal end portion 11 and the distal end portion 12 by an arc or a spiral line having a radius R.

Furthermore, the tip portion 12 includes a bearing portion or a portion of the lever,
A plurality of protrusions 14 are provided which are in sliding contact with each other.

As shown unfolded in FIG. 2, each protrusion 14 forms a bending radius R1 on both sides with respect to the horizontal portion of the distal end 12, a center bending radius R2, and slopes on both sides of the protrusion 14. 14A forms an inclination angle θ with respect to the horizontal seating surface of the member to be seated, and comes into contact with the seating surface at the apex of each protrusion 14.

The sum of the height El of the protrusion 14 and the height D of the intermediate part forms the total height L of the linear washer 10 in the free state,
It is set to an appropriate value based on the spring constant of the wire forming the linear washer 10, etc., depending on the necessary clearance between the two members in which the linear washer 10 is interposed.

Next, the operation of the above embodiment will be explained with reference to FIG.

FIG. 3 shows a shaft portion 16A of the bushing 16 on the bearing boss portion 15.
is press-fitted, and the bearing boss 15 and the head 16 of the bush 16 are
This figure shows part of a ring system in which a swing lever 17 is rotatably inserted into the shaft portion 16A between the shaft portion B and the shaft portion 16A, with the swing lever 17 being laterally supported by linear washers 10 from both ends thereof. .

That is, the swinging lever 17 is installed with the spring force based on the state in which the intermediate portion 13 of the linear washer 10 is contracted in the height direction, and also in the free height of the linear washer 10. Depending on the mounting condition, the swing lever 17 is held at an appropriate position in the axial direction of the shaft portion 16A, and an appropriate clearance is secured between the bearing boss portion 15 or the head portion 16B of the bush 16.

Further, the swing lever 17 is connected to the protrusion 1 of the linear washer 10.
4 and the top of the swing lever 17, and if dust enters around this sliding part, the dust will not adhere or be caught on the inclined surface 14A of the protrusion 14 and the seating surface of the swing lever 17. Since it is limited to a small area occupied by the inclination angle θ' formed by the angle θ', the amount is very small and does not significantly increase the sliding resistance of the swing lever 17.

Further, the linear washer 10 and the seating surface of the swing lever 17 are in contact with each other via the plurality of protrusions 14, and a gap is formed between them in the other circumferential portions excluding the protrusions 14. Therefore, dust can easily pass between the two, and by a slight rotation of the swing lever 1T, it becomes possible to actively drop off the dust stuck between the two, and the swing lever 17 Operability can always be maintained in good condition.

According to the above embodiment, since the portion of the linear washer 10 that comes into contact with the seating surface of the swing lever 17 is formed as the protruding portion 14, it is possible to suppress the adhesion of dust and the occurrence of a catching phenomenon between the two. Smooth operation of the swing lever 17 can be ensured.

In addition, in the shape of the protrusion 14 in the above embodiment,
Setting the chevron-shaped shape of the protrusion 14 by setting the both side bending radius R1 and the center bending radius R2 as appropriate radii of curvature, respectively,
By reducing the effective radius of friction consisting of the ring diameter C of the tip portion 12 provided with the protrusion 14, the operability between the protrusion 14 of the linear washer 10 and the seating surface of the swing lever 17 can be greatly improved. can.

FIG. 4 is an explanatory view showing a linear washer 10A as another embodiment of this invention, and the difference from the previous embodiment is that a plurality of protrusions 18 are also provided on the base end 11 on the large diameter side. The point is that

That is, according to this linear washer 10A, it is possible to suppress dust adhesion and catching between the members on both sides to be interposed, and to improve smooth operation between the two members. can.

5A and 5B are explanatory diagrams showing a linear washer 20 as yet another embodiment of this invention, and this linear washer 20 consists of a single ring closed in the circumferential direction,
Chevron-shaped protrusions 21 are provided at multiple positions on the circumference of the ring.

According to this linear washer 20, it is interposed between two relatively rotating members through the contact of the protruding portion 21, and forms an appropriate clearance between the two members, and also rotates with the linear washer 20. Dust may adhere to the contact area with the
It is possible to suppress the occurrence of catching and to smoothly operate the rotating member.

Further, the linear washer according to this invention is not limited to one having a circular cross section, but can also be applied to one having a rectangular cross section.

As described above, the linear washer according to this invention is interposed between two relatively rotating members, and has a plurality of protrusions formed on the side of the contact portion with at least one of the members. This has the effect of ensuring proper clearance between the two members and maintaining smooth operability of the rotating member.

[Brief explanation of the drawing]

FIG. 1A is a plan view showing one embodiment of the linear washer according to this invention, FIG. 1B is a side view of FIG. 1A, and FIG.
Fig. 3 is a partially sectional side view showing the same mounting state; Fig. 4 is a side view showing another embodiment; Fig. 5 A is the same. A plan view showing still another embodiment, FIG. 5B is a side view of FIG. 5A. 10, IOA, 20... Linear washer, 141
8, 21...Protrusion.

Claims (1)

[Scope of utility model registration request] A linear washer characterized by being interposed between two relatively rotating members and having a plurality of protrusions formed on the side of the contact portion with at least one of the members.