CN212273011U - Transmission oil pump with efficient lubrication - Google Patents

Abstract

The utility model provides a derailleur oil pump with high-efficient lubrication, including the pump body, inner rotor, external rotor, be equipped with the rotor chamber in the pump body, the rotor chamber includes oil feed chamber and oil outlet chamber, the inside wall of oil feed chamber is the same with the radius of the inside wall of oil outlet chamber, and all concentric with the shaft hole, the outside wall of oil feed chamber is the same with the radius of the outside wall of oil outlet chamber, and all concentric with the rotor chamber, two terminal surfaces of inner rotor all are equipped with a plurality of inner rotor oil pockets, the distance of inner rotor oil pocket to inner rotor center is greater than the radius of shaft hole, is less than the distance of the inside wall of oil feed chamber to shaft hole center; and a plurality of outer rotor oil holes are formed in the two end faces of the outer rotor, and the distance from the outer rotor oil holes to the center of the outer rotor is greater than the distance from the outer side wall of the oil outlet cavity to the center of the rotor cavity and smaller than the radius of the rotor cavity. According to the technical scheme, the oil holes are formed in the end faces of the inner rotor and the outer rotor, so that the efficient lubrication effect can be achieved, the contact area of the end faces can be reduced, and the friction resistance between the end faces is reduced.

Description

Transmission oil pump with efficient lubrication

Technical Field

The utility model relates to a derailleur oil pump technical field especially relates to a derailleur oil pump with high-efficient lubrication.

Background

The manual transmission is matched with the traditional heavy truck for a long time in the past, the manual transmission is complex to operate, a user can master the use skill after certain training, more and more heavy trucks start to be matched with the AT transmission along with the pursuit of the user on the comfort of the heavy truck in recent years, and particularly, the large-scale matched heavy AT transmission for special commercial vehicles and military vehicles can effectively reduce the operation difficulty and improve the comfort of the vehicles. The output rotating speed of the diesel engine is much lower than that of the gasoline engine due to the pressure working mode of the diesel engine, the power input end of the heavy AT transmission is connected with a flywheel of the diesel engine through a hydraulic torque converter, and an oil pump of the transmission is directly driven by the hydraulic torque converter.

Based on the restriction of above factor, transmission oil pump rotor rotational speed is not high, is unfavorable for forming complete oil film between rotor and the oil pump casing, and the rotor wears in advance with the oil pump casing easily, causes the rotor jamming even when wearing and tearing impurity is more, and the rotor also can explode because of the jamming when serious. In order to solve the phenomenon, most of heavy AT transmission oil pumps carry out manganese series phosphating on the rotor AT present, and a phosphating layer covered on the surface of the rotor has better wear resistance so as to relieve advanced wear caused by insufficient establishment of an oil film AT a low speed, but the phosphating layer is easy to peel off in the wear process, the peeled rotor and a pump body shell are subjected to advanced wear AT the low speed, and the powder metallurgy rotor phosphating has high process requirements and higher cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a derailleur oil pump with high-efficient lubrication is provided for solve the derailleur and form insufficient problem at rotor end face oil film when the low-speed revolution.

In order to achieve the purpose of the invention, the utility model adopts the following scheme: the utility model provides a derailleur oil pump with high-efficient lubrication, includes the pump body, inner rotor, external rotor, inner rotor and external rotor internal gearing, be equipped with the shaft hole in the pump body and hold the rotor chamber of inner rotor and external rotor, rotor chamber bottom is equipped with oil feed chamber and oil outlet chamber, oil feed chamber and oil outlet chamber are located the shaft hole both sides respectively, the inside wall of oil feed chamber is the same with the radius of the inside wall of oil outlet chamber, and all concentric with the shaft hole, the lateral wall of oil feed chamber is the same with the radius of the lateral wall of oil outlet chamber, and all concentric its characterized in that with the rotor chamber: the two end surfaces of the inner rotor are respectively provided with a plurality of inner rotor oil holes, and the distance from the inner rotor oil holes to the center of the inner rotor is greater than the radius of the shaft hole and less than the distance from the inner side wall of the oil inlet cavity to the center of the shaft hole; and a plurality of outer rotor oil holes are formed in the two end faces of the outer rotor, and the distance from the outer rotor oil holes to the center of the outer rotor is greater than the distance from the outer side wall of the oil outlet cavity to the center of the rotor cavity and smaller than the radius of the rotor cavity.

Preferably, the number of the oil holes of the inner rotor is the same as the number of teeth of the inner rotor, and the number of the oil holes of the outer rotor is the same as the number of teeth of the outer rotor.

Furthermore, each inner rotor oil pocket is evenly distributed on two end faces of the inner rotor at intervals, and each outer rotor oil pocket is evenly distributed on two end faces of the outer rotor at intervals.

Furthermore, the inner rotor oil pocket and the outer rotor oil pocket are both round blind holes, and the inner rotor oil pocket and the outer rotor oil pocket are the same in diameter and depth.

Furthermore, the inner rotor oil pocket and the outer rotor oil pocket are directly formed in the powder metallurgy firing process.

The utility model has the advantages that: through including, the terminal surface of external rotor sets up the oil pocket, make every oil pocket can both store fluid in the operation, and when the derailleur rotational speed is lower, fluid in the oil pocket can release, let the terminal surface form abundant oil film, rotor end surface oil film forms inadequately and takes place wearing and tearing in advance when having avoided low rotational speed, especially when the derailleur is out of work of stewing for a long time, after oil inlet chamber and the equal backward flow of fluid in oil outlet chamber, a small amount of fluid still can be stored in the oil pocket, when the engine starts the time gearbox oil pump and has not inhaled oil, can provide the end face lubrication demand for it, thereby play high-efficient lubricated effect. Moreover, the oil holes provide efficient end face lubrication, reduce the contact area of the end faces and reduce the friction resistance between the end faces. In addition, the oil cavity is directly formed in the powder metallurgy firing process, the manufacturing cost is low, and meanwhile, the oil cavity has the characteristic of being not easy to wear, and can keep the efficient lubricating effect for a long time.

Drawings

FIG. 1 is an exploded view of an embodiment of the present invention;

fig. 2 is a schematic structural view of a pump body in an embodiment of the present invention;

fig. 3 is a schematic structural view of an inner rotor in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the outer rotor in the embodiment of the present invention.

In the figure:

1-pump body 2-positioning pin 3-bush

4-inner rotor 5-outer rotor 6-cover plate

7-screw 8-steel ball 9-spring

10-screw plug 11-rotor cavity 12-oil inlet cavity

13-oil outlet cavity 14-inner rotor oil cavity 15-outer rotor oil cavity

16-axial hole.

Detailed Description

In order to facilitate the understanding of those skilled in the art, the present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.

As shown in fig. 1 to 4, a transmission oil pump with high-efficiency lubrication comprises a pump body 1, an inner rotor 4, an outer rotor 5 and a cover plate 6, wherein the inner rotor 4 and the outer rotor 5 are engaged with each other, a shaft hole 16 and a rotor cavity 11 for accommodating the inner rotor 4 and the outer rotor 5 are arranged in the pump body 1, an oil inlet cavity 12 and an oil outlet cavity 13 are arranged at the bottom of the rotor cavity 11, the oil inlet cavity 12 and the oil outlet cavity 13 are respectively arranged at two sides of the shaft hole 16, the inner side wall of the oil inlet cavity 12 and the inner side wall of the oil outlet cavity 13 have the same radius and are concentric with the shaft hole 16, the outer side wall of the oil inlet cavity 12 and the outer side wall of the oil outlet cavity 13 have the same radius and are concentric with the rotor cavity 11, a bushing 3 is arranged at the central hole of the inner rotor 4, an oil groove matched with the oil inlet cavity 12 and the oil outlet cavity, the cover plate 6 is provided with two positioning holes matched with the positioning pins 2, the cover plate 6 is fixed on the pump body 1 through screws 7, and the screws 7 can be hexagon socket countersunk head screws 7. In addition, a safety valve component consisting of a steel ball 8, a spring 9 and a screw plug 10 is arranged on one side of the pump body 1. The two end surfaces of the inner rotor 4 are provided with a plurality of inner rotor oil holes 14, and the distance from the inner rotor oil holes 14 to the center of the inner rotor 4 is greater than the radius of the shaft hole 16 and less than the distance from the inner side wall of the oil inlet cavity 12 to the center of the shaft hole 16; and a plurality of outer rotor oil holes 15 are formed in two end faces of the outer rotor 5, and the distance from the outer rotor oil holes 15 to the center of the outer rotor 5 is greater than the distance from the outer side wall of the oil outlet cavity 13 to the center of the rotor cavity 11 and smaller than the radius of the rotor cavity 11. The inner rotor oil pocket 14 and the outer rotor oil pocket 15 both have an oil storage function, so that each oil pocket can store oil in the transmission operation process, the oil can be released when the transmission rotating speed is low, the released oil is driven to flow on the whole end face through the rotation of the rotor, and the end face is enabled to form a sufficient oil film, so that the efficient lubrication effect is achieved.

Further, the number of the inner rotor oil pockets 14 may be the same as the number of teeth of the inner rotor 4, and the number of the outer rotor oil pockets 15 may be the same as the number of teeth of the outer rotor 5, so that the oil pockets can store and release more oil, thereby reducing the time for forming an oil film. Each inner rotor oil pocket 14 is evenly distributed on two end faces of the inner rotor 4 at intervals, and each outer rotor oil pocket 15 is evenly distributed on two end faces of the outer rotor 5 at intervals, so that the coverage surface of the oil pockets is larger and more uniform, and the time for forming an oil film is further reduced. The inner rotor oil pocket 14 and the outer rotor oil pocket 15 can be round blind holes, and the inner rotor oil pocket 14 and the outer rotor oil pocket 15 are the same in diameter and depth, so that the amount of oil stored and released in each oil pocket is consistent, oil can cover the end face more uniformly, and the time for forming an oil film is further reduced.

Furthermore, each oil pocket can store oil in the running process of the transmission, when the rotating speed of the transmission is low, the oil in the inner rotor oil pocket 14 and the outer rotor oil pocket 15 can be released, the end faces can form a sufficient oil film, the problem that the rotor end face oil film is not sufficiently formed and is worn in advance when the rotating speed is low is avoided, particularly when the transmission is kept still for a long time and does not work, after the oil in the oil inlet cavity 12 and the oil outlet cavity 13 flows back, the inner rotor oil pocket 14 and the outer rotor oil pocket 15 can still store a small amount of oil, and when the oil pump of the transmission does not suck oil when the engine is started, the end face lubrication requirement can be provided for the transmission. Moreover, the inner rotor oil pocket 14 and the outer rotor oil pocket 15 provide efficient end face lubrication, reduce the contact area of the end faces and reduce the friction resistance between the end faces.

In addition, the inner rotor oil pocket 14 and the outer rotor oil pocket 15 are directly formed in the powder metallurgy firing process, the manufacturing cost is low, and meanwhile, the inner rotor oil pocket and the outer rotor oil pocket are not easy to wear, and the high-efficiency lubricating effect can be kept for a long time.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and although the present invention has been disclosed for the preferred embodiment, it is not intended to limit the form and style of the product of the present invention, and those skilled in the art can make some modifications or modifications to the equivalent embodiment without departing from the scope of the present invention, but all that does not depart from the technical solution of the present invention still fall within the scope of the patent of the present invention.

Claims (5)

1. The utility model provides a derailleur oil pump with high-efficient lubrication, includes the pump body (1), inner rotor (4), external rotor (5), inner rotor (4) and external rotor (5) inner gearing, rotor chamber (11) that are equipped with shaft hole (16) and hold inner rotor (4) and external rotor (5) in the pump body (1), rotor chamber (11) bottom is equipped with oil feed chamber (12) and goes out oil chamber (13), oil feed chamber (12) are located shaft hole (16) both sides respectively with going out oil chamber (13), the inside wall of oil feed chamber (12) is the same with the radius of the inside wall of going out oil chamber (13), and all is concentric with shaft hole (16), the outside wall of oil feed chamber (12) is the same with the radius of the outside wall of going out oil chamber (13), and all is concentric with rotor chamber (11), its characterized in that: a plurality of inner rotor oil holes (14) are formed in the two end faces of the inner rotor (4), and the distance from the inner rotor oil holes (14) to the center of the inner rotor (4) is larger than the radius of the shaft hole (16) and smaller than the distance from the inner side wall of the oil inlet cavity (12) to the center of the shaft hole (16); and a plurality of outer rotor oil holes (15) are formed in two end faces of the outer rotor (5), and the distance from each outer rotor oil hole (15) to the center of the outer rotor (5) is greater than the distance from the outer side wall of the oil outlet cavity (13) to the center of the rotor cavity (11) and smaller than the radius of the rotor cavity (11).

2. The transmission oil pump with efficient lubrication of claim 1, wherein: the number of the inner rotor oil holes (14) is the same as the number of teeth of the inner rotor (4), and the number of the outer rotor oil holes (15) is the same as the number of teeth of the outer rotor (5).

3. The transmission oil pump with efficient lubrication of claim 2, wherein: each inner rotor oil pocket (14) is uniformly distributed on two end faces of the inner rotor (4) at intervals, and each outer rotor oil pocket (15) is uniformly distributed on two end faces of the outer rotor (5) at intervals.

4. The transmission oil pump with efficient lubrication of claim 3, wherein: the inner rotor oil pocket (14) and the outer rotor oil pocket (15) are both round blind holes, and the inner rotor oil pocket (14) and the outer rotor oil pocket (15) are the same in diameter and depth.

5. The transmission oil pump with efficient lubrication of claim 4, wherein: the inner rotor oil pocket (14) and the outer rotor oil pocket (15) are directly formed in the powder metallurgy firing process.

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