FIELD OF INVENTION

The present invention generally relates to a movement control mechanism for a three wheeled vehicle and more particularly to movement control mechanism control mechanism to control side movement of three wheeler vehicle.

BACKGROUND OF THE INVENTION

Generally in three wheeled vehicles steering assembly is very complex and has weight imbalance on left and right side of the steering assembly. Normally due to vehicle packaging more weight concentration remains in the right side of the steering. Due to road disturbances, unbalanced masses and lateral forces acting on front wheel general inclination of vehicle steering assembly shift towards right side of the vehicle.

Due to said right side inclination of the steering vehicle moves towards right side due to which driver has to put more efforts for continuous steering correction for stability. Involvement of continuous steering correction for stability of vehicle driver's fatigue increases and leads poor handling of vehicle. In existing design(s), directional stability is achieved by different steering column geometry arrangements. Due to dimensional variations, and bad road conditions, directional stability will get distorted and vehicle tends to move away from vehicle centreline.

Directional stability is considered as one of the vital parameter for safe handling of road vehicle, there is a requirement to develop a steering geometry which can address above mentioned issue.

SUMMARY OF THE INVENTION

Main objective of present invention is to provide movement control mechanism to control one side movement of the vehicle due to unbalance weight concentration at either side of steering assembly. Claimed arrangement is used for maintaining movement of the vehicle in longitudinal centreline of the vehicle. Said mechanism is attached with the steering assembly and has a spring unit fixed on the opposite side of the front suspension mounting area such that spring tension on one side can balance weight concentration on the other side. Mentioned spring unit is fixed with one upper bracket and one lower bracket. Upper bracket is fixed with the handle base of the steering assembly and said lower bracket is connected with the head tube of the vehicle frame. Said head tube of the frame is supporting the steering column further supporting the handle base over which handle bar of the vehicle is mounted. This movement control mechanism also has adjustment means fixed with the lower bracket. Said adjustment means helps in changing spring tension as per requirement of the vehicle.

Summary provided above explains the basic features of the invention and does not limit the scope of the invention. Additional detailed information related to the enablement of the invention will be provided in the detailed description and accompanying claims. Scope of the invention shall be based on the claims provided.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING

The present invention will become more fully understood from the detailed description given herein below and the accompanying drawing(s). Provided drawings are incorporated in and constitute embodiments of the invention and illustrates several aspects of the invention and together with a description of the embodiments serve to explain the principles of the invention. Drawings given below are provided to support the description of the invention and are not limiting the scope of the present invention. A brief description of the drawing is As follows:

Figure 1 depicts the existing arrangement of steering assembly in three wheelers.

Figure 2 shows different embodiments of the claimed invention.

Figure 3 and Figure 4 describe essential embodiments of the claimed invention.

DETAILED DESCRIPTION OF THE INVENTION

The embodiments disclosed below are not intended to be exhaustive or to limit the invention to the precise forms disclosed in the following detailed description. Rather, the embodiments are chosen and described so that best enabling arrangements of the invention can be explained through all possible embodiments and examples of it. The mvention may have application to all kind of vehicles. In Figure 1 steering column assembly for existing concept is described. The steering column assembly of three wheeled vehicles mainly consists of steering column 100, head pipe 101, front suspension unit 103 and trailing arm 102 connected with front wheel 104.

Steering column 100 rotatably passes through head pipe 101 and is connected to front wheel 104 through said trailing arm 102. Front suspension unit 103 is fixed with the steering column 100 at upper end 103a and with wheel axle 11 through a bracket 05 at the lower end 103b.

Above mentioned mounting arrangement of front suspension unit 103 is generally kept on right side of the steering assembly S and left side of steering assembly S comparatively has lesser elements. This packaging arrangement results in weight imbalance on left and right side of the steering assembly S. Due to road disturbances, unbalanced masses and lateral forces acting on front wheel 104, general inclination of vehicle steering assembly S shift towards right side of the vehicle.

Further, referring to Figure 2, Figure 3 and Figure 4 main embodiments of the movement control mechanism control mechanism are shown in order to describe assembling arrangement for enablement of the invention. Said movement control mechanism control mechanism controls right side movement of the vehicle due to unbalance weight concentration on right side of steering assembly S. Said steering assembly S consists of a handle bar 01 which is supported by a handle base 02. This handle base 02 is connecting steering assembly S with the steering column 100 as well as head tubelOl. This control mechanism has a spring unit 06 which is arranged in right side of the steering column 100 such that spring tension on the right side of the steering column 100 balances out the weight on the right side of steering column 100 and facilitates front orientation of the handle bar 01.

Referring back to Figure 3 and Figure 4, mentioned spring unit 06 is fixed with one upper bracket 04 through its upper mounting hook 06a and with one lower bracket 09 through its lower mounting hook 06b. Upper bracket 04 is fixed with the handle base 02 of the steering assembly S through fastening means 03. Lower end 09b of the lower bracket 09 is connected with the head tube 101 through lower bracket mounting means 10 and upper end of said lower bracket is supporting an adjustment mechanism 07,08. Said adjustment mechanism 07, 08 helps in changing the tension of spring 06 as per requirement of the vehicle. Said adjustment mechanism 07, 08 has threaded adjustment screw 07 which is fixed with the lower mounting hook 06b of the spring 06 on one end. Other end of mounting adjustment screw 07 is fixed with the lower bracket 09 through adjustment means 08. Said mounting means 08 run across threads of the adjustment screw 07 on human intervention. As per the requirement of amount of tension required on the right side of the steering assembly S, this adjustment means 08 can be arranged over the adjustment screw 07 and handle bar 01 or steering assembly S position can be corrected.

This control mechanism is described to be on the left side of the steering assembly S due to mounting of front suspension assembly 103 on the right side which shall be considered an exemplary embodiment of the invention which is providing the best mode of operation for same. However this control mechanism is applicable for both right and left side based on the vehicle assembly and packaging.

Claimed control mechanism ensures a directional stability for a three wheeler with an option to adjust it as per road and load conditions. This mechanism also facilitates lesser driver effort requirement and reduces user discomfort as during driving of the vehicle because with this mechanism it is easy to adjust the unbalanced load of vehicle and better directional stability can be achieved.

NUMERAL CLASSIFICATION

100 Steering Column
101 Head Tube
102 Trailing Arm
103 Front Suspension Unit
103a Front Suspension Upper End
103b Front Suspension Lower End
104 Front Wheel
01 Handle Bar
02 Handle Base
03 Upper Bracket Fastening Means
04 Upper Bracket
05 Front Suspension Mounting Bracket
06 Spring Unit
06a Upper Mounting Hook Of Spring
06b Lower Mounting Hook Of Spring
07 Adjustment Screw
08 Adjustment Means

9 Lower Bracket
10 Lower Bracket Mounting Means
11 Front Wheel Axle
12 Adjustment Screw Positing Support
S Steering Assembly

WHAT IS CLAIMED IS:

1) A movement control mechanism for a three wheeled vehicle, comprising a steering assembly supporting a front wheel and a handle bar assembly through a steering column such that a front suspension system is fixed on one side of the front wheel characterized in that a spring unit is fixed on opposite side of the front suspension system wherein the spring unit is fixed with the handle bar assembly through an upper bracket and with a head tube of a frame of the three wheeler.

2) The movement control mechanism, as claimed in claim 1, wherein the handle bar assembly comprises a handle bar supported on a handle base fixed with the steering column such that the upper bracket is fixed with said handle base.

3) The movement control mechanism, as claimed in claim 1, wherein the lower bracket comprises atleast one adjustment means configured to change the tension proportion of the spring unit.