Description:Field of Invention
[001] The invention relates to engine oil pumps provided on internal combustion engines. It more particularly relates to engine oil pumps that can be easily modified for utilisation on different engines. It additionally relates to engine oil pumps that have features to reduce oil pressure if pumped oil pressure exceeds a threshold value.
Background of the Invention
[002] Conventional, oil pumps installed in a typical internal combustion engine are designed specifically for each engine. Such pumps in the event of their utilization in other vehicles need to be completely redesigned, tested and calibrated to ensure that they are supplying the appropriate quantities of oil at a given engine RPM (Rotations Per Minute). This adds to the design and development cost and time of different vehicles. This in turn makes adds to the cost of the final product i.e. the vehicle sold in the market.
[003] Even though engines can be provided with variable displacement pumps to cater to requirement of different oil supply requirements, the complexity of such systems adds to the designing, testing, manufacturing and ultimately to the maintenance, cost and time of the vehicle. Such systems may also require additional external components like flow control valves or even additional flow control systems to effectively regulate the pressures developed by the pump itself. Given the inherent complexity of such devices, the need for using advanced tooling and skilled workforce increases. This in turn again adds to the vehicle’s cost. Given that our market is price sensitive, such solutions even though technically feasible, providing them may not always be economically viable. Therefore, it is an objective of the present invention, to provide an engine oil pump that is easy to manufacture and hence economically provide in different vehicles.
[004] It is another objective of the present invention to provide an engine oil pump that does not need any complicated additional systems to regulate oil pressure generated by the engine oil pump.
[005] It is still another objective of the present invention to provide an engine oil pump that has limited number of parts and is hence easy to manufacture and assemble in large numbers, thereby making it easier to achieve economies of scale.
[006] It is yet another objective of the present invention to provide an engine oil pump that has a simple construction, thereby making it easier to maintain in the long run.
[007] Further, advantages provided by the use of the present invention would become clear as the invention is described.
Summary of the Invention
[008] An embodiment of the invention achieving the stated objective, that is engine oil pump for commercial vehicles (100), comprises of, an idle gear (5), a head gear (10), driving and driven gears (20A, 20B), a casing (25), idle shaft (30), driving and driven shafts (35, 40), a cover (45), plurality of fastening elements (50), a holding pin (55), a ball (60), a spring (65), and a seat (70). In the engine oil pump for commercial vehicles (100), the casing (25) is provided with a wall (25W) on one of its sides that is configured to form a chamber (25C) and an extended portion of this chamber (25EP). The chamber (25C) houses and holds the driving and driven gears (20A, 20B) on driving and driven shafts (35, 40) that are respectively held within supporting positions provided on the casing (25) at their one end and at the cover (45) at their other end. The driving shaft (35) passes through an opening in said casing (25) to receive and hold upon its other end the head gear (10) on the other side of the casing (25). The idle gear (5) is received and held on the idle shaft (30), the idle shaft (30) being located and held within an opening in the casing (25), with said opening configured to be located outside of the wall (25W) and in a top central portion of the casing (25) at a location such that the teeth of idle gear (5) remains in constant mesh with the teeth of the head gear (10). The extended portion (25EP) of the chamber (25C) is provided with an opening (25H1) that opens into a housing portion (25SC) of the casing (25) that houses the ball (60) along said opening (25H1). The ball (60) being positioned above one end of the spring (65) with the other end of said spring (65) being further supported on the pin (55) though a seat (70). The pin (55) being positioned and held within an opening given in the housing portion (25SC). The cover (45) is has an outer profile configured to match the outer profile of the wall (25W) given on one side of the casing (25), so as to be able to form a seal for the chamber (25C) and the extended portion (25EP) from above. The cover (45) is provided with multiple openings that are located along its outer edge that are configured to be located over matching openings provided outside the wall (25W) so as to allow the plurality of fastening elements (50) to attach the cover (45) on the casing (25).
Brief Description of Drawings
[009] The present invention is illustrated in the accompanying drawings that contain references numerals for indicating its various parts. The description of the present invention would therefore be better understood with reference to accompanying diagrams, wherein
[0010] Figure 1 discloses an exploded view of the preferred embodiment of the present invention.
[0011] Figure 2 discloses another exploded view of the preferred embodiment of the present invention.
[0012] Figure 3 discloses a cut section view of the preferred embodiment of the present invention.
[0013] Figure 4 discloses another cut section view of the preferred embodiment of the present invention.
[0014] Figure 5 discloses the front view of the preferred embodiments of the present invention.
[0015] Figure 6 discloses the back view of the preferred embodiments of the present invention without its cover.
Detailed Description of the Invention
[0016] Referring to the set of figures 1, and 2, engine oil pump for commercial vehicles (100), comprises of, an idle gear (5), a head gear (10), driving and driven gears (20A, 20B), a casing (25), idle shaft (30), driving and driven shafts (35, 40), a cover (45), plurality of fastening elements (50), a holding pin (55), a ball (60), a spring (65), a seat (70). The invention’s construction is as shown in the figures and as described hereinafter.
[0017] The casing (25) (refer to Figs 3 and 4) is provided with a wall (25W) on one of its sides that is configured to form a chamber (25C) and an extended portion of this chamber (25EP). The chamber (25C) houses and holds the driving and driven gears (20A, 20B) on driving and driven shafts (35, 40) that are respectively held within supporting positions provided on the casing (25) at their one end and at the cover (45) at their other end. The driving shaft (35) passes through an opening in said casing (25) to receive and hold upon its other end the head gear (10) on the other side of the casing (25). The driving and driven gears (20A, 20B) mesh with each other, and hence the driving torque received by driving gear (20A) is transmitted to driven gear (20B) as well.
[0018] The idle gear (5) (refer to Figs 1, 3, and 5) is received and held on the idle shaft (30). The idle shaft (30) being located and held within an opening in the casing (25), with said opening configured to be located outside of the wall (25W) and in a top central portion of the casing (25) at a location such that the teeth of idle gear (5) remains in constant mesh with the teeth of the head gear (10). The head gear (10) in turn receives its driving torque from a vehicular rotational input source that can be gears and shafts connected with the prime mover or any other rotational input source as the vehicle designer may find suitable for the purpose.
[0019] The extended portion (25EP) (refer to Figs 3, 4 and 6) of the chamber (25C) is provided with an opening (25H1) that opens into a housing portion (25SC) of the casing (25) that houses the ball (60) along said opening (25H1). The ball (60) being positioned above one end of the spring (65) with the other end of said spring (65) being further supported on the pin (55) though a seat (70). The pin (55) being positioned and held within an opening given in the housing portion (25SC).
[0020] The opening at the lower end of said housing portion (25SC) is open to allow fluid to drain through the housing portion (25SC). The chamber (25C) transitions into the extended portion through arms (25A1, 25A2) whose profile are configured to allow gears (20A, 20B) to trap oil between surface of the arms (25A1, 25A2) and the teeth of gears (20A, 20B).
[0021] The cover (45) (refer to Figs 1, 2, 3 and 4) is having an outer profile configured to match the outer profile of the wall (25W) given on one side of the casing (25), so as to be able to form a seal for the chamber (25C) and the extended portion (25EP) from above. The cover (45) is provided with multiple openings that are located along its outer edge that are configured to be located over matching openings provided outside the wall (25W) so as to allow the plurality of fastening elements (50) to attach the cover (45) on the casing (25).
[0022] The cover (45) has an opening (45H1) (refer to Fig. 2) that is provided on a projected portion that is located approximately above the driving gear (20A). The cover (45) has another opening (45H2) that is provided on a projected portion that is located approximately above the extended portion (25EP) of the chamber (25C). The plurality of fastening elements allows the cover (45) to be fastened to the case (25) and then further onto an engine superstructure as provided on the vehicle. The extended portion (25EP) of the chamber (25C) is provided with an opening (25H2) that leads into a cavity ending at the opening provided for the idle shaft (30) in the casing (25), said opening (25H2) facilitates lubrication of the idle shaft (30).
[0023] The case (25) is provided with a plurality of ribs (25R) (refer to Figs 1 and 2) along a top portion of said case that begin along the edge of said case (25), and also at the opening provided for idle shaft (30), and then terminate at the wall (25W). Openings are provided along the edges of the case (25) to allow for proper accommodation of dowel pins (15) to enable for proper alignment and fixing of said case (25) on the engine superstructure as provided on the vehicle.
[0024] When the engine oil pump for commercial vehicles (100) (refer to figs. 3 to 6) starts operating, the idle gear (5) transmits the rotational input to the head gear (10), which in turn drives the driving gear (20A) and the driven gears (20B). This causes oil entering the chamber (25C) from the opening (45H1) to get trapped between the teeth of the gears (20A, 20B) and the arms (25A1, 25A2) and then get pushed into the extended portion (25EP).
[0025] The idle shaft (30)’s accommodating opening now begins receiving lubrication via the opening (25H2) and its linked cavity. In case the developed pressure exceeds a threshold value, lubrication fluid pushes the ball (65), that causes the spring (65) to get compressed, thereby allowing the lubrication fluid (lubrication oil) to flow past it and out of the opening provided at the lower end of the housing portion (25SC). The appropriate amount of lubricating fluid flows into the extended portion (25EP) and then out of the opening (45H2) of the cover (45) and towards the parts to be lubricated in the engine superstructure, via the fluid connections made to the opening (45H2).
[0026] The engine oil pump for commercial vehicles (100), so disclosed can be easily modified by varying the thickness of the gears (20A, 20B), the wall (25W) and also the cover (45). This would allow such a pump to be utilized in different vehicles with similar or the same pump requirement with minimum alteration to other features of the engine oil pump for commercial vehicles (100). The construction of the engine oil pump for commercial vehicles (100) so disclosed is strong, properly lubricated along its essential points and also protected against development of over pressure anytime during its ordinary operation.
[0027] Technical advantages offered by the invention i.e., engine oil pump for commercial vehicles (100) are-
- It is easy to manufacture and hence economically provide in different vehicles.
- It does not need any complicated additional systems to regulate oil pressure generated by the engine oil pump.
- It has limited number of parts and is hence easy to manufacture and assemble in large numbers, thereby making it easier to achieve economies of scale.
- It has a simple construction, thereby making it easier to maintain in the long run.
- It is structurally strong.
- It provides multiple features to ensure proper lubrication of components included within itself.
[0028] The disclosed invention i.e. the engine oil pump for commercial vehicles (100) achieves all the set-out objectives.
[0029] 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 present invention has been herein described in terms of its preferred embodiment, those skilled in the art will recognize that the preferred embodiment herein disclosed, can be practiced with modifications within the scope of the invention herein described.
, Claims:We Claim,
1. An engine oil pump for commercial vehicles (100) comprising,
• an idle gear (5),
• a head gear (10),
• driving and driven gears (20A, 20B),
• a casing (25),
• idle shaft (30),
• driving and driven shafts (35, 40),
• a cover (45),
• plurality of fastening elements (50),
• a holding pin (55),
• a ball (60),
• a spring (65),
• a seat (70),
wherein,
- the casing (25) is provided with a wall (25W) on one of its sides that is configured to form a chamber (25C) and an extended portion of this chamber (25EP);
- the chamber (25C) houses and holds the driving and driven gears (20A, 20B) on driving and driven shafts (35, 40) that are respectively held within supporting positions provided on the casing (25) at their one end and at the cover (45) at their other end; the driving shaft (35) passes through an opening in said casing (25) to receive and hold upon its other end the head gear (10) on the other side of the casing (25);
- the idle gear (5) is received and held on the idle shaft (30), the idle shaft (30) being located and held within an opening in the casing (25), with said opening configured to be located outside of the wall (25W) and in a top central portion of the casing (25) at a location such that the teeth of idle gear (5) remains in constant mesh with the teeth of the head gear (10);
- the extended portion (25EP) of the chamber (25C) is provided with an opening (25H1) that opens into a housing portion (25SC) of the casing (25) that houses the ball (60) along said opening (25H1); the ball (60) being positioned above one end of the spring (65) with the other end of said spring (65) being further supported on the pin (55) though a seat (70); the pin (55) being positioned and held within an opening given in the housing portion (25SC);
- the cover (45) is has an outer profile configured to match the outer profile of the wall (25W) given on one side of the casing (25), so as to be able to form a seal for the chamber (25C) and the extended portion (25EP) from above; and
- the cover (45) is provided with multiple openings that are located along its outer edge that are configured to be located over matching openings provided outside the wall (25W) so as to allow the plurality of fastening elements (50) to attach the cover (45) on the casing (25).
2. The engine oil pump for commercial vehicles (100) as claimed in claim 1, wherein,
- the opening at the lower end of said housing portion (25SC) is open to allow fluid to drain through the housing portion (25SC);
- the cover (45) has an opening (45H1) that is provided on a projected portion that is located approximately above the driving gear (20A); and
- the cover (45) has another opening (45H2) that is provided on a projected portion that is located approximately above the extended portion (25EP) of the chamber (25C).
3. The engine oil pump for commercial vehicles (100) as claimed in claim 2, wherein the chamber (25C) transitions into the extended portion through arms (25A1, 25A2) whose profile are configured to allow gears (20A, 20B) to trap oil between surface of the arms (25A1, 25A2) and the teeth of gears (20A, 20B).
4. The engine oil pump for commercial vehicles (100) as claimed in claim 3, wherein,
- the plurality of fastening elements allows the cover (45) to be fastened to the case (25) and then further onto an engine superstructure as provided on the vehicle; and
- the extended portion (25EP) of the chamber (25C) is provided with an opening (25H2) that leads into a cavity ending at the opening provided for the idle shaft (30) in the casing (25), said opening (25H2) facilitates lubrication of the idle shaft (30).
5. The engine oil pump for commercial vehicles (100) as claimed in claim 4, wherein, the case (25) is provided with a plurality of ribs (25R) along a top portion of said case that begin along the edge of said case (25), and also at the opening provided for idle shaft (30), and then terminate at the wall (25W).
6. The oil pump for commercial vehicles (100) as claimed in claim 5, wherein openings are provided along the edges of the case (25) to allow for proper accommodation of dowel pins (15) to enable for proper alignment and fixing of said case (25) on the engine superstructure as provided on the vehicle.
Dated 17th day of February 2025

VIDIT CHOUBEY
(IN P/A 5566)
AGENT FOR THE APPLICANT(S)

To,
The Controller of Patents,
The Patent Office, at Mumbai