DESC:FORM 2
The Patent Act 1970
(39 of 1970)
&
The Patent Rules, 2005

COMPLETE SPECIFICATION
(SEE SECTION 10 AND RULE 13)

TITLE OF THE INVENTION

“THROTTLE LEVER MECHANISM FOR A VEHICLE”

APPLICANT:

Name Nationality Address
Mahindra & Mahindra Limited Indian Mahindra & Mahindra Ltd.,
MRV, Mahindra World City (MWC),
Plot No. 41/1, Anjur Post, Chengalpattu,
Kanchipuram District – 603004 (TN) INDIA

The following specification particularly describes and ascertains the nature of this invention and the manner in which it is to be performed:-

TECHNICAL FIELD
[001] The embodiments herein generally relate to throttle lever mechanisms for vehicles and more particularly, but not exclusively to combination of cable and rod based throttle lever mechanism for vehicles

BACKGROUND
[002] Generally, work vehicles like tractors or other similar vehicles include a hand operated throttle lever and a foot operated throttle lever for providing acceleration to the vehicle. The conventional, hand operated throttle lever, hereinafter called as throttle lever includes a cable that is directly connected between a throttle lever and a fuel injection pump. The cable connecting the throttle lever and the fuel injection pump is usually oriented in a horizontal direction and prolonged exposure of the cable leads to accumulation of mud inside the cable during puddling operations. Hence, life of the cable is reduced due to rusting of cable and thereby resulting in cable failure. Further, the aforementioned throttle lever mechanism is prone to early breakage of a wire provided inside the cable due to contact of the wire with metal crimped parts provided to the cable and thereby resulting in premature cable failure.
[003] Therefore, there exists a need for a throttle lever mechanism that prevents entry of mud inside the cable to prevent cable failure. Furthermore, there exists a need for a throttle lever mechanism that can eliminate the aforementioned drawbacks.

OBJECTS
[004] The principal object of an embodiment of this invention is to provide a throttle lever mechanism that prevents entry of mud inside the cable to prevent cable failure.
[005] Another object of an embodiment of this invention is to provide a throttle lever mechanism enabling swiveling of the cable to prevent cable disorientation and wire breakage.
[006] Yet, another object of an embodiment of this invention is to provide a throttle lever mechanism having high efficiency and high durability.
[007] The objects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.
BRIEF DESCRIPTION OF DRAWINGS
[008] The embodiments of this invention are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[009] FIG. 1 depicts a perspective view of a throttle lever mechanism, according to an embodiment of the invention as disclosed herein;
[0010] FIG. 2 depicts a perspective view of a throttle lever assembled with a governor control friction assembly, according to an embodiment of the invention as disclosed herein;
[0011] FIG. 3 depicts a side view of a cable and linkage element assembled with a governor cross shaft assembly, according to an embodiment of the invention as disclosed herein; and
[0012] FIG. 4 depicts a partial perspective view of a swivel assembly, a cable mounting bracket and the linkage element, according to an embodiment of the invention as disclosed herein.

DETAILED DESCRIPTION
[0013] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0014] The embodiments herein achieve a throttle lever mechanism that prevents entry of mud inside the cable to prevent cable failure. Referring now to the drawings and more particularly to FIGS. 1 through 4, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0015] FIG. 1 depicts a perspective view of a throttle lever mechanism 100, according to an embodiment of the invention as disclosed herein. In an embodiment, the throttle lever mechanism 100 includes a throttle lever 102, a governor control friction assembly 104, a cable 106, a swivel assembly 108, cable mounting bracket 110 (as shown in fig. 3), a linkage element 112, a governor cross shaft assembly 114, a rod 116 and a plurality of nuts 118 (as shown in fig. 3).
[0016] In an embodiment, the throttle lever 102 is mounted to the governor control friction assembly 104 (as shown in fig. 2). The throttle lever 102 is operated by an operator’s hand.
[0017] In an embodiment, the governor control friction assembly 104 is used to hold the throttle lever 102 at definite engine speed i.e., constant engine speed is achieved.
[0018] The cable 106 includes an inner wire 106a (as shown in fig. 4) and an outer casing 106b (as shown in fig. 2). The outer casing 106b of the cable 106 is used to enclose and protect the inner wire 106a. The inner wire 106a of the cable 106 is having a first end 106f (as shown in fig. 2) and a second end 106s (as shown in fig. 3). In an embodiment, the first end 106f of the inner wire 106a of the cable 106 is connected to the throttle lever 102 via governor control friction assembly 104. Further, in an embodiment, the second end 106s of the inner wire 106a of the cable 106 is connected to the linkage element 112. Furthermore, in an embodiment, a longitudinal axis of the inner wire 106a is substantially co-axial to a longitudinal axis of the outer casing 106b of the cable 106. The cable 106 connecting the throttle lever 102 and the linkage element 112 is substantially oriented in a vertical direction. Furthermore, in an embodiment, the longitudinal axis of the inner wire 106a of the cable 106 is substantially transverse to a longitudinal plane of the linkage element 112.
[0019] In an embodiment, the swivel assembly 108 is configured to be provided to the cable 106. In an embodiment, the swivel assembly 108 includes a shaft 108a (as shown in fig. 4), a bush 108b (as shown in fig. 4) mounted onto the shaft 108a, a locking element (not shown) and a plurality of washers (not shown). In an embodiment, the shaft 108a of the swivel assembly 108 is having oval cross section. However, it is also within the scope of the invention to provide the shaft 108a with circular cross section or any other cross section without otherwise deterring the intended function of the shaft 108a as can be deduced from the description. The bush 108b is used to provide bearing surface for the shaft 108a and also support movable motion of the shaft 108a. Each of the washers (not shown) of the swivel assembly 108 is used to hold each of the nuts 118. In an embodiment, each of the washers (not shown) is a spring washer. However, it is also within the scope of the invention to provide any other type of washers to hold the nuts 118 without otherwise deterring the intended function of the washers (not shown) of the swivel assembly 108 as can be deduced from the description. The locking element (not shown) of the swivel assembly 108 is used to lock one end (not shown) of the shaft 108a. In an embodiment, the swivel assembly 108 is used to hold at least a portion of the cable 106 substantially in an upright position. Further, the shaft 108a of the swivel assembly 108 turns to hold the cable 106 located between the swivel assembly 108 and the linkage element 112 substantially in the upright position on engagement of the throttle lever 102. The swivel assembly 108 regulates the orientation of the cable 106. The swivel assembly 108 enables swiveling of the cable 106 to prevent disorientation of the cable 106 and breakage of the inner wire 106a of the cable 106.
[0020] In an embodiment, the cable mounting bracket 110 is used to support the cable 106. In an embodiment, the cable mounting bracket 110 is a L-shaped bracket. However, it is also within the scope of the invention to provide an I-shaped bracket or any other type of bracket having different shape without otherwise deterring the intended function of the cable mounting bracket 110 as can be deduced from the description. In an embodiment, the cable mounting bracket 110 is having a base 110a and an arm 110b extending from the base 110a. The base 110a of the cable mounting bracket 110 defines an opening 110o mounted to a transmission housing (not shown). The arm 110b of the cable mounting bracket 110 defines an opening (not shown) to hold the bush 108b of the swivel assembly 108.
[0021] In an embodiment, the linkage element 112 is connected to the shaft 114a of the governor cross shaft assembly 114. In an embodiment, the linkage element 112 is used to provide motion to the governor cross shaft assembly 114 via shaft 114a.
[0022] The governor cross shaft assembly 114 is used to pull the rod 116 via a longitudinal member 114l i.e., to provide linear motion to the rod 116. The governor cross shaft assembly 114 is also connected with the foot operated accelerator pedal assembly (not shown). The governor cross shaft assembly 114 transmits the effort force from foot operated accelerator pedal assembly (not shown) to pull the rod 116. Therefore, a common governor control is provided for both throttle lever 102 and accelerator pedal assembly (not shown).
[0023] The rod 116 is used to operate a fuel feed unit (not shown). In an embodiment, the fuel feed unit (not shown) is a fuel injection pump. The rod 116 is having a first end 116a and a second end 116b. In an embodiment, the first end 116a (as shown in fig. 1) of the rod 116 is connected to the longitudinal member 114l (as shown in fig. 1) of the governor cross shaft assembly 114 and the second end 116b (as shown in fig. 1) of the rod 116 is connected to the fuel feed unit (not shown).
[0024] The working of the throttle lever mechanism 100 is as follows. As and when, an operator or driver pulls the throttle lever 102 to provide acceleration to the vehicle (not shown), the cable 106 is pulled by the throttle lever 102 due to angular displacement of the throttle lever 102. The pulling of cable 106 turns the linkage element 112 to turn the shaft 114a of the governor cross shaft assembly 114. The shaft 114a turns the longitudinal member 114l of the governor cross shaft assembly 114 to pull the rod 116 to actuate the fuel feed unit (not shown) and thereby the fuel feed unit (not shown) injects fuel into the engine (not shown). Further, the swivel assembly 108 holds the cable 106 located between the swivel assembly 108 and the linkage element 112 substantially in upright position due to turning of shaft 108a on engagement of the throttle lever 102 i.e., turning of shaft 108a is done to prevent contact of inner wire 106a of the cable 106 with metal crimp parts of cable 106 and thereby resulting in prevention of breakage of the inner wire 106a of the cable 106. Thus, an efficient and highly durable throttle lever mechanism 100 is provided for the engine (not shown).
[0025] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
CLAIMS
We claim,
1. A throttle lever mechanism comprising:
a throttle lever;
a linkage element connected to a shaft of a governor cross shaft assembly;
a cable comprising an inner wire having a first end connected to the throttle lever and a second end connected to the linkage element;
a swivel assembly having a shaft, a bush mounted on to the shaft, at least one washer and a locking element, the swivel assembly connected to the cable;
a cable mounting bracket having a base and an arm extending from the base, the arm defining an opening adapted to hold the bush of the swivel assembly; and
a rod having a first end connected to a longitudinal member of the governor control cross shaft assembly and a second end connected to a fuel feed unit,
wherein
the swivel assembly is adapted to hold at least a portion of the cable substantially in an upright position; and the cable pulls the linkage element to turn the shaft of the governor cross shaft assembly to pull the rod through the longitudinal member to actuate the fuel feed unit on engagement of the throttle lever; and shaft of the swivel assembly turns to hold the portion of the cable in upright position on engagement of the throttle lever.
2. The throttle lever mechanism as claimed in claim 1, wherein said fuel feed unit is a fuel injection pump.
3. The throttle lever mechanism as claimed in claim 1, further comprising a governor control friction assembly adapted to hold the throttle lever at definite engine speed.
4. The throttle lever mechanism as claimed in claim 1, wherein the locking element of the swivel assembly is adapted to lock one end of the shaft of the swivel assembly.
5. The throttle lever mechanism as claimed in claim 1, wherein the base of the cable mounting bracket includes an opening adapted to be secured to a transmission housing.
6. The throttle lever mechanism as claimed in claim 1, wherein the throttle lever is a hand operated throttle lever.

7. The throttle lever mechanism as claimed in claim 1, wherein the portion of cable in upright position is between the swivel assembly and the linkage element.

Date: 22nd March, 2016 Signature:
Dr..Kalyan Chakravarthy

ABSTRACT
Throttle lever mechanism for a vehicle includes a throttle lever, a governor control friction assembly, a cable, a swivel assembly, cable mounting bracket, a linkage element, a governor cross shaft assembly, a rod and a plurality of nuts. The cable is connected to the throttle lever and the linkage element. The swivel assembly is used to hold the cable located between the swivel assembly and the linkage element substantially in an upright position due to turning of a shaft of the swivel assembly on engagement of the throttle lever.
,CLAIMS:CLAIMS
We claim,
1. A throttle lever mechanism comprising:
a throttle lever;
a linkage element connected to a shaft of a governor cross shaft assembly;
a cable comprising an inner wire having a first end connected to the throttle lever and a second end connected to the linkage element;
a swivel assembly having a shaft, a bush mounted on to the shaft, at least one washer and a locking element, the swivel assembly connected to the cable;
a cable mounting bracket having a base and an arm extending from the base, the arm defining an opening adapted to hold the bush of the swivel assembly; and
a rod having a first end connected to a longitudinal member of the governor control cross shaft assembly and a second end connected to a fuel feed unit,
wherein
the swivel assembly is adapted to hold at least a portion of the cable substantially in an upright position; and the cable pulls the linkage element to turn the shaft of the governor cross shaft assembly to pull the rod through the longitudinal member to actuate the fuel feed unit on engagement of the throttle lever; and shaft of the swivel assembly turns to hold the portion of the cable in upright position on engagement of the throttle lever.
2. The throttle lever mechanism as claimed in claim 1, wherein said fuel feed unit is a fuel injection pump.
3. The throttle lever mechanism as claimed in claim 1, further comprising a governor control friction assembly adapted to hold the throttle lever at definite engine speed.
4. The throttle lever mechanism as claimed in claim 1, wherein the locking element of the swivel assembly is adapted to lock one end of the shaft of the swivel assembly.
5. The throttle lever mechanism as claimed in claim 1, wherein the base of the cable mounting bracket includes an opening adapted to be secured to a transmission housing.
6. The throttle lever mechanism as claimed in claim 1, wherein the throttle lever is a hand operated throttle lever.

7. The throttle lever mechanism as claimed in claim 1, wherein the portion of cable in upright position is between the swivel assembly and the linkage element.