DESC:ENHANCED REBOUND DAMPING ASSEMBLY IN SHOCK ABSORBER

Field of the invention:

The present invention relates to a rebound stop for a shock absorber and, more particularly, to a rebound damping assembly in the shock absorber.

Background of the invention:

Usually damping force of any shock absorber is tuned to ideal ride conditions of a particular vehicle. The shock absorber consists of two major contributors for a good ride comfort a) damping force and b) spring.

In most of prior art cases, required spring compression adjustment option is available for setting based on the number of riders and stiffness requirement of rider.

Typically, shock absorbers are designed such that the damping value of the shock absorber changes at different velocities of stroking; these values are designed keeping a particular road condition and riding conditions. The damping forces can be reduced to some extent through plate valve combination, but there are few limitations to increase the damping forces after a set value.

Also, there are limitations on feasibility to fit in the available vehicle envelope, fitting a next bore size design and cost for having a higher damping force with original design of piston valve assembly, which is one of the key contributors for providing alternate ride comforts.

Accordingly, there exists need to provide an enhanced rebound damping assembly in the shock absorber that helps in increasing damping force for rebound damping and also overcomes the above mentioned drawbacks in the prior art.
Objects of the invention:

An object of the present invention is to increase damping force for rebound damping in a shock absorber beyond conventional shock absorber.

Another object of the present invention is to balance both higher damping force, combination of plate valves and cost to maintain the required values in for rebound damping in the shock absorber.

Summary of the invention:

Accordingly, the present invention provides an enhanced rebound damping assembly in a shock absorber. The shock absorber comprises a damper body having a first piston and plate valve assembly configured therein and a piston rod. The first piston and plate valve assembly is operably connected with the piston rod inside the damper body. The rebound damping assembly is configured within the the damper body. The rebound damping assembly comprises of a second piston and plate valve assembly that is operably connected with the first piston and plate valve assembly and the piston rod. The second piston and plate valve assembly acts as an additional piston with a set of plate valves to provide a marginal resistance to oil flow through a set of holes in the piston and the plate valves.

Brief description of the drawings:

The objects and advantages of the present invention will become apparent when the disclosure is read in conjunction with the following figures, wherein

Figure 1 shows longitudinal sectional view of a rebound damping assembly in a shock absorber, in accordance with the present invention;

Figure 2 shows enlarged cross-sectional view of the rebound damping assembly in the shock absorber, in accordance with the present invention;

Figure 3 shows a graph for damping pickup characteristic of the rebound damping assembly in the shock absorber, in accordance with the present invention.

Detailed description of the embodiments:

The foregoing objects of the present invention are accomplished and the problems and shortcomings associated with the prior art, techniques and approaches are overcome by the present invention as described below in the preferred embodiments.

The present invention provides an enhanced rebound damping assembly in a shock absorber. This helps to increase damping force for rebound damping in the shock absorber where, with normal piston assembly combination it has limitations. The enhanced rebound damping assembly can be incorporated to all shock absorbers with an extra stroke at compression.

The present invention is illustrated with reference to the accompanying drawings, throughout which reference numbers indicate corresponding parts in the various figures. These reference numbers are shown in bracket in the following description.

Referring to figure 1, a rebound damping assembly in a shock absorber (100), in accordance with the present invention is shown.

The shock absorber (100) comprises of a damper body (10) having a first piston and plate valve assembly (20) configured therein. The first piston and plate valve assembly (20) is operably connected with a piston rod (30) inside the damper body (10).
The rebound damping assembly is configured within the the damper body (10). The rebound damping assembly comprises of a second piston and plate valve assembly (40). The second piston and plate valve assembly (40) is operably connected with the first piston and plate valve assembly (20) and the piston rod (30).

In an embodiment, the second piston and plate valve assembly (40) acts as an additional piston with a set of plate valves. This additional piston provides a marginal resistance to oil flow through a set of holes in the piston and the plate valves. The second piston and plate valve assembly (40) provides an add on damping force during rebound stroke of the shock absorber (100). The plate valve combination is distributed over two sets of pistons and valve assembly (20 and 40) to bring in an additional damping force within the damper envelope. The rebound damping assembly achieves balance both higher damping force and combination of plate valves to maintain the required values.

Advantages of the invention:

1. The rebound damping assembly achieves higher damping force within the damper envelope.
2. The rebound damping assembly achieves enhanced 30% rebound damping (Figure 3) in the shock absorber (100).
3. The rebound damping assembly is applicable for all Shock absorbers with an extra stroke at compression.

The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the present invention and its practical application, and to thereby enable others skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstances may suggest or render expedient, but such omissions and substitutions are intended to cover the application or implementation without departing from the scope of the claims of the present invention.
,CLAIMS:invention.

We claim:

1. An enhanced rebound damping assembly in a shock absorber (100), the shock absorber (100) comprising,
a damper body (10) having a first piston and plate valve assembly (20) configured therein and a piston rod (30), wherein the first piston and plate valve assembly (20) is operably connected with the piston rod (30) inside the damper body (10),
characterized in that,
the rebound damping assembly configured within the the damper body (10), the rebound damping assembly comprises of a second piston and plate valve assembly (40), wherein the second piston and plate valve assembly (40) is operably connected with the first piston and plate valve assembly (20) and the piston rod (30), and
wherein, the second piston and plate valve assembly (40) acts as an additional piston with a set of plate valves to provide a marginal resistance to oil flow through a set of holes in the piston and the plate valves.

2. The enhanced rebound damping assembly in the shock absorber as claimed in claim 1, wherein the second piston and plate valve assembly (40) provides an add on damping force during rebound stroke of the shock absorber (100).

3. The enhanced rebound damping assembly in the shock absorber as claimed in claim 1, wherein the plate valve combination is distributed over two sets of pistons and valve assembly (20 and 40) to bring in an additional damping force within the damper envelope.

Dated this 22nd day of January 2019
Madhavi Vajirakar
(Agent for Applicant) IN/PA-2337