CLIAMS:We claim,
1. A sealing arrangement for a motor, said arrangement comprising,
at least one ring (10) slidably mounted on a stator frame (12) of the motor;
an O-ring (14) integrated with said ring (10) mounted on the stator frame (12); and
a plurality of snap lock members (16) on said ring (10) adapted to secure the position of said O-ring (14) with respect to the stator frame (12).
2. A sealing arrangement as claimed in claim (1) wherein said O-ring (14) of at least one said ring (10) slidably mounted on stator frame (12) is adapted to be positioned between the stator frame (12) and a drive end shield (18) of said motor.
3. A sealing arrangement as claimed in claim (1) wherein said O-ring (14) of at least one said ring (10) slidably mounted on stator frame (12) is adapted to be positioned between the stator frame (12) and the commutator end cover (20).
4. A sealing arrangement as claimed in claim (1) wherein said snap lock members (16) on said rings (10) mounted on the stator frame (12) are oriented in opposite direction.
5. A sealing arrangement as claimed in claim (1) wherein said plurality of snap lock members (16)on said ring interlock with the drive end shield (18).
6. A sealing arrangement as claimed in claim (1) wherein said plurality of snap lock members (16) on said ring interlock with the commutator end cover (20).
7. A sealing arrangement as claimed in claim (1) wherein, said O-ring (14) extends inwardly from said two slid able rings (10)
,TagSPECI:Complete specification:
The following specification particularly describes the invention and the manner in which it is to be performed.

Field of the invention:
[001] The invention relates to a sealing arrangement for a motor.
Background of the invention:
[002] Gear reduction starters are used for application like tractors and other off highway vehicles. The starter motors for these applications face the problems due to entry of water and dust into the motor. To prevent the entry of dust and water, O-rings are used for sealing the motor. Typically there are grooves provided in the stator frame or the drive end shield or the commutator end cover for fitting the O-rings. The O-rings or a gasket needs to be accurately positioned in the grooves for proper sealing effect. This is difficult and time consuming for the assembly. Further there is a possibility that the O-rings or the gaskets fitted in the groove slip from their position and the sealing effect is lost and it allows the dust and water to enter the motor.
[003] Thus it is necessary that a simple means for sealing the starter motors is provided which is easy for assembly and reliable.
Brief description of the invention:
[004] The present invention envisages a sealing arrangement for a motor. The sealing arrangement comprises two rings slidably mounted on a stator frame of the motor. An O-ring is integrated with each of the ring such that the O-ring seals the gaps between the stator frame and drive end shield of the motor and between stator frame and commutator end cover. There are pluralities of snap lock members on each of the rings. These snap lock members are oriented in opposite direction and are adapted to interlock with the drive end shield and the commutator end cover.
[005] The present invention improves the sealing between stator frame and drive end shield, and the stator frame and the commutator end cover. The snap fit ensures a reliable and secure positioning of the O-ring. There is no need of precise groove in the stator frame or drive end shield or the commutator end cover for the positioning of the O-ring. Locating the O-ring or the gasket in the groove is not required and hence the time for assembly is reduced. The proposed snap fit rings with integrated O-rings for sealing are easy to assemble and mount on the motor.
Brief description of the drawings:
[006] The present invention is described with reference to the following accompanying drawings,
[007] Fig. 1 illustrates a ring with an integrated O-ring for sealing in accordance with one embodiment of the invention; and
[008] Fig. 2 illustrates a motor with rings slidably mounted on the stator frame for the purpose of sealing.
Detailed description of the invention:
[009] Fig. 1 illustrates a ring (10) with an integrated O-ring (14) for sealing in accordance with one embodiment of the invention.
[0010] It is envisaged in accordance with one embodiment of the invention that the ring (10) is provided between stator frame (12) and the drive end shield (18) of a motor, and the stator frame (12) and the commutator end cover (20) to improve the sealing. The ring (10) has an integrated O-ring (14) which seals the motor from dust and water. The ring (10) is held in position by means of plurality of snap lock members (16).
[0011] Fig. 2 illustrates a motor with rings (10) slidably mounted on the stator frame (12) for the purpose of sealing.
[0012] The sealing arrangement for a motor comprises at least one ring (10) slidably mounted on a stator frame (12) of the motor. An O-ring (14) is integrated with the ring (10) mounted on the stator frame (12). A plurality of snap lock members (16) are provided on the ring (10). The snap lock members (16) on the ring (10) interlock with the commutator end cover (20) and the drive end shield (18) of the motor. The snap lock members (16) are thus adapted to secure the position of the O-ring (14) with respect to the stator frame (12). The O-ring (14) of one the rings (10) slidably mounted on the stator frame (12) is adapted to be positioned between the stator frame (12) and the drive end shield (18). The O-ring (14) of one said ring (10) slidably mounted on the stator frame (12) is adapted to be positioned between the stator frame (12) and the commutator end cover (20).
[0013] In accordance with one embodiment of the invention, it is envisaged that the snap lock members (16) on the two rings (10) mounted on the stator frame (12) are oriented in opposite direction and interlock with the drive end shield (18) or the commutator end cover (20).
[0014] In one embodiment of the invention the O-ring (14) extends inwardly from said two slidable rings (10) and can be slideably positioned between the stator frame (12) and the drive end shield (18) or between the stator frame (12) and the commutator end cover (20).
[0015] The present invention discloses a snap ring (10) mounted on the stator frame (12) which includes an O-ring (14) to prevent entry of water and dust into the motor. To improve the sealing between the stator frame (12) and the drive end shield (18) or between the stator frame (12) and the commutator end cover (20) the snap rings (10) securely positions the sealing O-rings (14). The need for a precise groove in the stator frame (12) or the drive end shield (18) or the commutator end cover (20) for fitting an O-ring (14) is overcome by the snap rings (10) in accordance with the present invention. There is no need to locate the O-ring (14) or a profile gasket in the groove. The O-rings (14) can be positioned easily in less time by sliding the snap rings (10) on the stator frame (12) and locking the snap lock members (16) with the drive end shield (18) and the commutator end cover (20). It is easy to assemble and to replace the sealing O-rings (14) as they are externally mounted.
[0016] It should be understood that embodiments explained in the description above are only illustrative and do not limit the scope of this invention. Many such embodiments and other modifications and changes in the embodiment explained in the description are envisaged. The scope of the invention is only limited by the scope of the claims.