DESC:TECHNICAL FIELD

The present invention relates generally to a moulded case circuit breakers and, more particularly, to a“3-pinion and a rack mechanism in Rotary operating mechanisms and Motor operators” used for remote operations of a switching device / molded case circuit breakers used for transmission and distribution of electrical power within industrial / domestic segment.

BACKGROUND

The use of electrical devices is well known for making, breaking and to provide safety in a typical electrical distribution system.

These devices get mounted inside a board or panel board for added safety to the operator. Most often these devices are required to be operated either from outside or by opening the enclosure/ panel.

In view of operator’s safety, remote operation is an alternative way to operate the switching devices. Usually to achieve this, an add-on accessory is mounted over the switching device, which may operate the device when called for.

Also in today’s scenario response time for an electrical switching system to switchover from one desired source to the other is gaining importance. Thus with a view of lesser operational time and remote operation and space of a switching device, rotary operating mechanism coupled with rotary operating hands and direct driven type or stored energy type motor mechanism are used.

In light of foregoing discussion, there exists a need to provide a mechanism that minimizes the effort for opening, closing and resetting of the circuit breaker mechanism. There exists a need to provide a mechanism for a mechanism which forms the main system of rotary operating mechanism and motor operating system with less number of components to convert linear movement of SCPD knob to rotary through optimized utilization of space for making the overall mechanism compact and reliable used for circuit breaker operation. Also, there is a need for mechanism such mechanism engages positively with the operating knob of the circuit breaker.

The above mentioned shortcomings, disadvantages and problems are addressed herein and which will be understood by reading and studying the following specification.

This mechanism consists of a 3-Pinion and a rack (Either horizontal or vertical) which forms a cassette system that converts linear motion of breaker knob into rotary output. This rotary output can be effectively utilized to build surrounding architecture for the rotary operating mechanism and motor operator mechanisms.

Usually, Rotary operating mechanisms and motor operators incorporate various mechanical linkage systems and linear to rotary conversion systems for achieving the desired purpose. Differently arranged cam-scotch and rack and pinion arrangements are common. Few coupled with spring energy systems are further made effective.

The prior-art Patent document US3970808 relates to handle mechanism which is readily assembled to form an architecture which rotates relatively with a fixed element positioned eccentrically to the breaker centre as well as mechanism centre. This mechanism utilizes cam scotch linkage mechanism in an effective manner.

The prior-art Patent document Patent US7361857 relates to external operating handle mechanism for MCCB which incorporates single pinion and one sided toothed and both side guided rack mechanism for conversion purpose. The pinion directly coupled to handle drives the rack which eventually drive the toggle knob of MCCB.

There still exists a need to for an improvised mechanism for enhancing the efficiency of the existing rack travel and thereby building a compact space utilizing mechanism for improvised toggle travel and sustained reliability.

SUMMARY

This summary is provided to introduce concepts related an improved rack travel in rotary operating mechanisms and motor operators for MCCB. This summary is not intended to identify essential features of the subject matter nor is it intended for use in determining or limiting the scope of the subject matter.

In one implementation, the present invention provides an improvised mechanism in line with above patent with a very basic differentiation being the driving pinion.

In one implementation, the present invention generally relates to building a compact space utilizing mechanism for improvised toggle travel and sustained reliability.

In one implementation of the present invention, the proposed invention resides in exact gear data selection and mechanism building which otherwise turns out to be self locking, because the data selection not only depends on gear design parameters but also on mechanism architecture assembly as a whole.

In one implementation of the present invention provides a mechanism which can be effectively utilized for any Rotary operating mechanism as well as motor operators.

In one implementation, the present invention provides an improvised mechanism in line with above patent with a very basic differentiation being the driving pinion. In the present invention the mechanism rack is driven by two identical gears which are simultaneously driven by the main pinion thus introducing a parallel step in the system wherein the rack meshes with intermediate identical gears instead of main pinion and since the identical gears being two in nos. add up for effective increase in rack travel. The present invention generally relates to building a compact space utilizing mechanism for improvised toggle travel and sustained reliability.

In one implementation, the present invention resides in exact gear data selection and mechanism building which otherwise turns out to be self locking, because the data selection not only depends on gear design parameters but also on mechanism architecture assembly as a whole.

In one implementation, the present invention provides a mechanism which can be effectively utilized for any Rotary operating mechanism as well as motor operators.

Accordingly, in one implementation, an improved rotary mechanism comprising a 3-gear and a rack arrangement CHARACTERIZED IN THAT at least one power input gear (6) configured to receives power through at least one motor and gearing arrangement and thereby transfers the power received simultaneously to at least one power output gear (7) and at least one horizontal rack (8); and the power output gear (7) configured to transfer the power received to the horizontal rack (8) and a truncated one side toothed horizontal rack (9) or a truncated one side toothed vertical rack (10) and thereby initiates motion of the horizontal rack (8) and the truncated one side toothed horizontal rack (9) or the truncated one side toothed vertical rack (10) simultaneously.

In one implementation, an improved rotary mechanism comprising a 3-gear and a rack arrangement CHARACTERIZED IN THAT at least one power input gear (6) configured to receives power through manual rotary movement of operating knob and thereby transfers the power received simultaneously to at least one power output gear (7) and at least one horizontal rack (8); and the power output gear (7) configured to transfer the power received to the horizontal rack (8) and a truncated one side toothed horizontal rack (9) or a truncated one side toothed vertical rack (10) and thereby initiates motion of the horizontal rack (8) and the truncated one side toothed horizontal rack (9) or the truncated one side toothed vertical rack (10) simultaneously.

Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to refer like features and components.

Figure 1 illustrates a motor operator superimposed on a MCCB and sub system mechanism of rotary operating mechanism for MCCBs is shown, in accordance with an embodiment of the present subject matter.

Figure 2 illustrates an internal architecture of motor operator comprising a 3-gear and a vertical rack mechanism is shown, in accordance with an embodiment of the present subject matter.

Figure 3 illustrates various components of the sub assembly in vertically oriented configuration is shown, in accordance with an embodiment of the present subject matter.

Figure 4 illustrates a differently configured 3-gear and a rack mechanism as a sub assembly for motor operator is shown, in accordance with an embodiment of the present subject matter.

Figure 5 illustrates a cassette incorporating 3-gear and horizontal rack mechanism which can be effectively used as a sub system for both rotary operating mechanism and motor operator is shown, in accordance with an embodiment of the present subject matter.

Figure 6 illustrates a sub system configuration incorporating 3-gear and horizontal rack mechanism for rotary operating mechanism is shown, in accordance with an embodiment of the present subject matter.

Figure 7 illustrates a various components of the sub system is shown, in accordance with an embodiment of the present subject matter.

Figure 8 illustrates a typical construction and component of 3-gear and horizontal rack mechanism is shown, in accordance with an embodiment of the present subject matter.

Figure 9 illustrates a 3-gear and horizontal rack arrangement is shown, in accordance with an embodiment of the present subject matter.

Figure 10 illustrates a 3-gear and horizontal rack mechanism with one side toothed rack, is shown, in accordance with an embodiment of the present subject matter.

DETAILED DESCRIPTION OF THE PRESENT INVNENTION

Preferred embodiments of the present disclosure will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the present disclosure in unnecessary detail.

The terms and words used in the following description are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention.

It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise.

By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.

In one implementation, the invention relates generally an improved rack travel in rotary operating mechanisms and motor operators for MCCB.

In one implementation, the proposed mechanism consists of a 3-Pinion and a rack (Either horizontal or vertical) which forms a cassette system that converts linear motion of breaker knob into rotary output. This rotary output can be effectively utilized to build surrounding architecture for the rotary operating mechanism and motor operator mechanisms.

The rotary operating mechanisms and motor operators incorporate various mechanical linkage systems and linear to rotary conversion systems for achieving the desired purpose. Differently arranged cam-scotch and rack and pinion arrangements are common. Few coupled with spring energy systems are further made effective.

In one implementation, the present invention provides an improvised mechanism in line with above patent with a very basic differentiation being the driving pinion. The present invention generally relates to building a compact space utilizing mechanism for improvised toggle travel and sustained reliability.

Another important object of this invention resides in exact gear data selection and mechanism building which otherwise turns out to be self locking, because the data selection not only depends on gear design parameters but also on mechanism architecture assembly as a whole.

Also the present invention provides a mechanism which can be effectively utilized for any Rotary operating mechanism as well as motor operators.

Referring now to figure 1, shows motor operator superimposed on a MCCB and sub system mechanism of rotary operating mechanism for MCCBs.

Referring now to figure 2, shows internal architecture of motor operator comprising a 3-gear and a vertical rack mechanism.

Referring now to figure 3, shows the various components of the sub assembly in vertically oriented configuration.

Referring now to figure 4, shows a differently configured 3-gear and a rack mechanism as a sub assembly for motor operator.

Referring now to figure 5, shows a cassette incorporating 3-gear and horizontal rack mechanism which can be effectively used as a sub system for both rotary operating mechanism and motor operator.

Referring now to figure 6, shows sub system configuration incorporating 3-gear and horizontal rack mechanism for rotary operating mechanism.

Referring now to figure 7, shows various components of the sub system.

Referring now to figure 8, shows typical construction and component of 3-gear and horizontal rack mechanism.

Referring now to figure 9, shows the improved rack travel by 3-gear and horizontal rack arrangement.

Referring now to figure 10, shows another approach for 3-gear and horizontal rack mechanism with one side toothed rack.

Below mentioned are the components used in the invention:
1. Motor operator
2. Subsystem of rotary operating mechanism
3. Base
4. Cover plate
5. Cassette
6. Power input gear (Main Gear)
7. Power output gear (rack mover)
8. Horizontal rack
9. Truncated one side toothed horizontal rack
10. Vertical rack
11. Housing pins
12. Motor
13. Housing plates.

In one implementation an effective use of 3-gear and a rack arrangement is provided wherein the power input gear (6) which either receives power through motor and gearing arrangement or manual rotary movement of operating knob and transfers it simultaneously to power output gear (7) and horizontal rack (8). The power output gear (7) eventually transfer the power and motion to the horizontal rack (8) and truncated one side toothed horizontal (9) or vertical rack (10), in sync, as per the configuration of system in mechanism.

As the rack is subjected to motion transferred by two gears simultaneously, the effective travel increases in multiples with respect to single pinion and a rack mechanism for same size architecture.

In one implementation, the present invention is specialized in incorporating a specific design philosophy of accompanying the general gear data like numbers of teeth and meshing angles to be multiple of factor “3”.

Also, the proposed invention further incorporates truncated one side toothed horizontal rack arrangement to leverage easy rack design as when the rack is supposed to simultaneously engage with power input gear (6) and power output gear (7) the tooth profile meshing with any of the either side lags or leads by a factor of module and tooth angle with the other side tooth profile. In one implementation, preferably a 20 degree tooth angle is used with pressure angle of preferably 20 degree.

In one implementation, the present invention enable to develop a compact size mechanism which in caters for improved rack travel with 3-gear and a rack mechanism as against same size single gear and rack mechanism.

Apart from above mentioned features, advantages and the implementation, the present invention have some features that provides advancement over the existing prior-art, few of them are mentioned below:

1. The present invention includes a single pinion-rack arrangement replaced by 3-gear pinion rack arrangement.
2. The present invention provides an effective increase in rack travel.
3. The identical gear combination at justified angle for increased movement is presented by the proposed invention.
4. The present invention is configured and suitable to work with any standard gear module existing in the prior-art.

Accordingly, in one implementation, an improved rotary mechanism comprising a 3-gear and a rack arrangement CHARACTERIZED IN THAT at least one power input gear (6) configured to receives power through at least one motor and gearing arrangement and thereby transfers the power received simultaneously to at least one power output gear (7) and at least one horizontal rack (8); and the power output gear (7) configured to transfer the power received to the horizontal rack (8) and a truncated one side toothed horizontal rack (9) or a truncated one side toothed vertical rack (10) and thereby initiates motion of the horizontal rack (8) and the truncated one side toothed horizontal rack (9) or the truncated one side toothed vertical rack (10) simultaneously.

In one implementation, an improved rotary mechanism comprising a 3-gear and a rack arrangement CHARACTERIZED IN THAT at least one power input gear (6) configured to receives power through manual rotary movement of operating knob and thereby transfers the power received simultaneously to at least one power output gear (7) and at least one horizontal rack (8); and the power output gear (7) configured to transfer the power received to the horizontal rack (8) and a truncated one side toothed horizontal rack (9) or a truncated one side toothed vertical rack (10) and thereby initiates motion of the horizontal rack (8) and the truncated one side toothed horizontal rack (9) or the truncated one side toothed vertical rack (10) simultaneously.

In one implementation, the truncated one side toothed horizontal (9) or vertical (10) rack enables the improved rotary mechanism to engage the power output gear (7) smoothly.

In one implementation, The improved rotary mechanism as claimed in claims 5 and 6, wherein the tooth profile meshing with any of the either side lags or leads by a factor of module and tooth angle with the other side tooth profile, wherein preferably a 20 degree tooth angle is used with pressure angle of preferably 20 degree.

WORKING EXAMPLE

In one exemplary embodiment of the present invention, the following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.

Although a an improved rack travel in rotary operating mechanisms and motor operators for MCCB has been described in language specific to structural features and/or methods, it is to be understood that the embodiments disclosed in the above section are not necessarily limited to the specific features or methods or devices described. Rather, the specific features are disclosed as examples of implementations of an improved rack travel in rotary operating mechanisms and motor operators for MCCB.
,CLAIMS:1. An improved rotary mechanism comprising a 3-gear and a rack arrangement CHARACTERIZED IN THAT
at least one power input gear (6) configured to receive power through at least one motor and gearing arrangement and thereby transfer the power received simultaneously to at least one power output gear (7) and at least one horizontal rack (8); and
the power output gear (7) configured to transfer the power received to the horizontal rack (8) and a truncated one side toothed horizontal rack (9) or a truncated one side toothed vertical rack (10) and thereby initiates motion of the horizontal rack (8) and the truncated one side toothed horizontal rack (9) or the truncated one side toothed vertical rack (10) simultaneously.

2. The improved rotary mechanism as claimed in claim 1, wherein the truncated one side toothed horizontal (9) or vertical (10) rack enables the improved rotary mechanism to engage the power output gear (7) smoothly

3. The improved rotary mechanism as claimed in claims 1 and 2, wherein the tooth profile meshing with any of the either side lags or leads by a factor of module and tooth angle with the other side tooth profile.

4. The improved rotary mechanism as claimed in claims 1 to 3, wherein preferably a 20 degree tooth angle is used with pressure angle of preferably 20 degree.

5. An improved rotary mechanism comprising a 3-gear and a rack arrangement CHARACTERIZED IN THAT
at least one power input gear (6) configured to receives power through manual rotary movement of operating knob and thereby transfers the power received simultaneously to at least one power output gear (7) and at least one horizontal rack (8); and
the power output gear (7) configured to transfer the power received to the horizontal rack (8) and a truncated one side toothed horizontal rack (9) or a truncated one side toothed vertical rack (10) and thereby initiates motion of the horizontal rack (8) and the truncated one side toothed horizontal rack (9) or the truncated one side toothed vertical rack (10) simultaneously.

6. The improved rotary mechanism as claimed in claim 5, wherein the truncated one side toothed horizontal (9) or vertical (10) rack enables the improved rotary mechanism to engage the power output gear (7) smoothly.

7. The improved rotary mechanism as claimed in claims 5 and 6, wherein the tooth profile meshing with any of the either side lags or leads by a factor of module and tooth angle with the other side tooth profile, wherein preferably a 20 degree tooth angle is used with pressure angle of preferably 20 degree.