CN114215909A - Transmission lubricating system and vehicle - Google Patents

Abstract

The invention provides a gearbox lubricating system and a vehicle. Wherein, the oil pump shell is arranged opposite to the front shell and is connected on the front shell; the oil pump body is arranged between the front shell and the oil pump shell. The front shell is a front shell of the gearbox, and the oil pump body is of all other structures except the oil pump shell. Wear to be equipped with the input shaft on the gearbox procapsid, the input shaft front end need be connected motor and engine isotructure, and the outside axial space of gearbox procapsid itself has been occupied, and other mechanisms can't be installed to gearbox procapsid front end. The gearbox lubricating system of this structure sets up the oil pump shell outside the casing in the front, with the oil pump body integration in the front between casing and the oil pump shell, the oil pump body is located between motor and the gearbox procapsid, can not occupy in addition and increase the holistic axial length of gearbox, gearbox lubricating system simple structure, occupation space is little.

Description

Transmission lubricating system and vehicle

Technical Field

The invention relates to the technical field of transmissions, in particular to a transmission lubricating system and a vehicle.

Background

The traditional mechanical transmission mostly adopts splash lubrication, a few structures adopt simple auxiliary lubrication devices, and for a large transmission with a plurality of parts far away from the oil level, if a traditional lubrication method is adopted, rotating parts such as gears, bearings and parts close to the center of a main shaft far away from the oil level cannot be lubricated well, so that the service life and the service performance of the transmission are influenced.

The forced lubricating system of the transmission in the prior art comprises a transmission rear shell, an intermediate shaft, an oil pump and a circulating oil path, wherein the circulating oil path comprises an oil inlet pipe, an oil outlet pipe and an oil injection pipe. Wherein, the oil pump sets up on the casing of back and is connected on the jackshaft rear end interface, advances oil pipe, goes out oil pipe and communicates oil pump oil feed end and oil feed end respectively, goes out oil pipe connection oil spout pipe. The oil spout pipe stretches into inside the derailleur casing, is equipped with the nozzle opening on the oil spout pipe. The oil pump draws the inside lubricating oil of derailleur out to the oil spout pipe, and lubricating oil sprays through the nozzle to the gear jet lubrication when jackshaft rotates.

According to the forced lubricating system of the transmission, the oil pump is arranged outside the transmission shell, so that the occupied space and the overall length of the transmission are increased; in addition, the oil injection pipe injects oil opposite to the gear, when the oil injection pipe rotates at a high speed, lubricating oil is easily thrown to the outer side of the main shaft of the transmission under the action of centrifugal force, and the lubricating oil is difficult to lubricate parts close to the inner side of the main shaft, so that the problems of abrasion, sintering and the like of parts on the inner side of the main shaft are easily caused; meanwhile, the oil inlet pipe and the oil return pipe of the transmission forced lubrication system are both arranged outside the transmission shell, and an external pipeline is easy to damage and leak oil; in addition, the oil pump of the forced lubrication system of the transmission is connected to the rear end interface of the intermediate shaft, occupies the rear end interface of the intermediate shaft, cannot be added with a power takeoff and a speed reducer at the rear end of the transmission simultaneously when the type spectrum of the transmission needs to be expanded subsequently, and has the problem of occupying the type spectrum expansion interface.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the oil pump of the transmission lubricating system in the prior art is arranged at the rear end of the intermediate shaft outside the rear shell of the transmission, so that the whole occupied space and the whole length of the transmission are increased, and the transmission lubricating system and the vehicle are provided.

In order to solve the above problems, the present invention provides a transmission lubrication system including a front housing, an oil pump housing, and an oil pump body. Wherein, the oil pump shell is arranged opposite to the front shell and is connected to the front shell; the oil pump body is arranged between the front shell and the oil pump shell.

Optionally, in the gearbox lubricating system described above, an oil inlet channel and an oil outlet channel respectively communicated with the oil pump body are provided between the front housing and the oil pump housing.

Optionally, in the transmission lubrication system described above, the oil inlet channel is surrounded by oil inlet grooves respectively formed between the front housing and the oil pump housing; the oil outlet channel is formed by surrounding an oil outlet groove formed between the front shell and the oil pump shell.

Optionally, in the gearbox lubricating system described above, the oil outlet channel is provided with a first oil outlet; the gearbox lubrication system further comprises:

the oil spraying pipe is arranged in the front shell and communicated with the first oil outlet, and a first oil spraying hole is formed in the oil spraying pipe.

Optionally, in the gearbox lubricating system described above, a second oil outlet is provided on the oil outlet channel; the gearbox lubrication system further comprises:

an input shaft provided on the oil pump housing and the front housing; the input shaft is provided with a first oil duct; the first oil duct is communicated with the second oil outlet;

the main shaft is arranged on the inner side of the input shaft; a second oil duct is arranged on the main shaft and communicated with the first oil duct, and the second oil duct extends from one end of the main shaft to the other end of the main shaft; and a second oil injection hole communicated with the second oil duct is formed in the main shaft.

Optionally, in the gearbox lubricating system described above, a transition groove is provided on the oil pump housing, and two ends of the transition groove are respectively communicated with the second oil outlet and the first oil passage.

Optionally, in the transmission lubrication system, the first oil duct is disposed in the middle of the input shaft, an oil inlet is disposed on the input shaft, and two ends of the oil inlet are respectively communicated with the transition groove and the first oil duct.

Optionally, in the gearbox lubricating system, the transition groove is annular, and/or at least two oil inlets are formed in the circumferential direction of the input shaft.

Optionally, the gearbox lubrication system described above further comprises an intermediate shaft provided on the front housing; the oil pump body is connected with the front end of the intermediate shaft.

The invention provides a vehicle comprising a gearbox lubrication system as described in any one of the above.

The invention has the following advantages:

1. according to the gearbox lubricating system provided by the invention, the oil pump shell is arranged outside the front shell, the oil pump body is integrated between the front shell and the oil pump shell, the oil pump body is positioned between the motor and the gearbox front shell, the overall axial length of the gearbox cannot be additionally occupied or increased, and the gearbox lubricating system is simple in structure and small in occupied space.

2. The oil inlet channel and the oil outlet channel are arranged between the front shell and the oil pump shell and are located inside the gearbox shell, so that the oil duct is effectively prevented from being damaged by external force, and the oil leakage of the oil duct is prevented.

3. The oil inlet channel and the oil outlet channel are directly formed on the front shell and the oil pump shell, an oil conveying pipeline does not need to be additionally arranged, and the gearbox lubricating system is simple in structure.

4. Lubricating oil that the oil pump body was pumped is divided into two the tunnel after getting into the oil outlet passageway, gets into through first oil-out all the way and spouts the oil spout pipe and lubricate the gear, gets into first oil duct and second oil duct through the second oil-out all the way, and the inboard spare part of main shaft is lubricated through the blowout of second oil spout, and lubricating system can lubricate all parts of gearbox inside, improves lubricated effect by a wide margin, prevents that the inboard spare part of main shaft from wearing and tearing the sintering, is showing the life who improves the gearbox.

5. The oil pump body is arranged at the front end of the intermediate shaft and does not occupy the axial space of the gearbox additionally, and the rear end interface of the intermediate shaft is not occupied, so that the power takeoff and the speed reducer can be connected through the rear end interface of the intermediate shaft to expand the type spectrum of the gearbox.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows a schematic view of an oil pump housing of the transmission lubrication system of the present invention;

FIG. 2 shows a schematic view of the front housing of the transmission lubrication system of the present invention;

FIG. 3 shows a schematic representation of the lubrication circuit of the transmission lubrication system of the present invention;

FIG. 4 shows a schematic of an oil spray bar of the transmission lubrication system of the present invention.

Description of reference numerals:

1-front housing; 2-oil pump housing; 21-a transition groove; 3-an oil pump body; 4-an oil inlet channel; 41-oil inlet tank; 5-an oil outlet channel; 51-an oil outlet groove; 52-a first oil outlet; 53-a second oil outlet; 6-oil spraying pipe; 61-a first injection hole; 7-an input shaft; 71-a first oil passage; 72-oil inlet hole; 8-a main shaft; 81-a second oil passage; 82-second spray hole.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a transmission lubrication system, as shown in fig. 1 and 2, which includes a front housing 1, an oil pump housing 2, and an oil pump body 3. Wherein, the oil pump shell 2 is arranged opposite to the front shell 1 and is connected on the front shell 1; the oil pump body 3 is provided between the front housing 1 and the oil pump housing 2.

The front shell 1 is a front shell 1 of a gearbox, and the oil pump body 3 is an oil pump except for the shell of the oil pump body. Wear to be equipped with input shaft 7 on the gearbox procapsid 1, input shaft 7 front end needs to connect structures such as motor and engine, and the outside axial space of gearbox procapsid 1 itself has been occupied, and other mechanisms can't be installed to gearbox procapsid 1 front end.

The gearbox lubricating system of this structure sets up the oil pump housing 2 outside casing 1 in the front, with oil pump body 3 integrated between casing 1 and oil pump housing 2 in the front, oil pump body 3 is located between motor and the gearbox procapsid 1, can not occupy in addition and increase the holistic axial length of gearbox, gearbox lubricating system simple structure, occupation space is little.

Referring to fig. 1 and 2, an oil inlet passage 4 and an oil outlet passage 5, which are respectively communicated with the oil pump body 3, are provided between the front housing 1 and the oil pump housing 2. The oil inlet channel 4 and the oil outlet channel 5 are arranged between the front shell 1 and the oil pump shell 2, and the oil inlet channel 4 and the oil outlet channel 5 are both located inside the gearbox shell, so that the oil duct is effectively prevented from being damaged by external force, and the oil leakage of the oil duct is prevented.

Preferably, the oil inlet passage 4 is surrounded by oil inlet grooves 41 respectively formed between the front housing 1 and the oil pump housing 2; the oil outlet passage 5 is defined by oil outlet grooves 51 respectively formed between the front housing 1 and the oil pump housing 2. The oil inlet channel 4 and the oil outlet channel 5 are directly formed on the front shell 1 and the oil pump shell 2, an oil conveying pipeline does not need to be additionally arranged, and the gearbox lubricating system is simple in structure. For example, the oil inlet groove 41 and the oil outlet groove 51 are both cast and molded on the front shell 1 and the oil pump housing 2, the oil pump housing 2 is connected to the front shell 1 through bolts, a sealing gasket is arranged between the two shells for sealing, the oil pump housing 2 outside the oil inlet groove 41 and the oil outlet groove 51 is a plane, a sealing gasket is arranged on the oil pump housing 2, the oil inlet grooves 41 on two sides are butted and enclosed into the oil inlet channel 4 after the oil pump housing 2 is butted with the front shell 1, the oil outlet grooves 51 on two sides are butted and enclosed into the oil outlet channel 5, and the outer sides of the oil inlet channel 4 and the oil outlet channel 5 are sealed through sealing gaskets to prevent oil leakage.

The oil inlet channel 4 is provided with an oil inlet which is communicated with an oil filter inside the gearbox, the oil inlet channel 4 is communicated with an oil inlet of the oil pump body 3, the oil outlet channel 5 is communicated with an oil outlet of the oil pump body 3, the oil pump body 3 pumps lubricating oil out of the filter to the oil inlet channel 4, and then the lubricating oil is pumped out of the oil pump body 3 and enters the oil outlet channel 5.

As shown in fig. 1, 2 and 4, the oil outlet channel 5 is provided with a first oil outlet 52; the gearbox lubricating system further comprises an oil spraying pipe 6, the oil spraying pipe 6 is arranged in the front shell 1 and communicated with the first oil outlet 52, and a first oil spraying hole 61 is formed in the oil spraying pipe 6. Spout oil pipe 6 and extend the inside gear top of gearbox, lubricating oil spouts through first nozzle opening 61 on spouting oil pipe 6, lubricates the gear.

Further, a second oil outlet 53 is arranged on the oil outlet channel 5; referring to fig. 3, the gearbox lubrication system further comprises an input shaft 7 and a main shaft 8. Wherein, the input shaft 7 is arranged on the oil pump shell 2 and the front shell 1; the input shaft 7 is provided with a first oil passage 71; the first oil passage 71 communicates with the second oil outlet 53; the main shaft 8 is arranged on the inner side of the input shaft 7; a second oil channel 81 is arranged on the main shaft 8, the second oil channel 81 is communicated with the first oil channel 71, and the second oil channel 81 extends from one end of the main shaft 8 to the other end of the main shaft 8; the main shaft 8 is provided with a second oil jet hole 82 communicated with the second oil passage 81. Lubricating oil pumped out by the oil pump body 3 enters the oil outlet channel 5 and then is divided into two paths, one path of lubricating oil enters the oil injection pipe 6 through the first oil outlet 52 to lubricate the gear, the other path of lubricating oil enters the first oil duct 71 and the second oil duct 81 through the second oil outlet 53, and the lubricating oil is sprayed out through the second oil injection port to lubricate parts inside the main shaft 8.

Referring to fig. 1 and 3, a transition groove 21 is formed in the oil pump housing 2, and two ends of the transition groove 21 are respectively communicated with the second oil outlet 53 and the first oil passage 71. The second oil outlet 53 and the first oil passage 71 are communicated through the transition groove 21. Optimally, the transition groove 21 is integrally formed in the middle of the oil pump housing 2, and the second oil outlet 53 and the first oil passage 71 can be communicated without an additional communication structure, so as to further simplify the lubrication system of the gearbox.

Referring to fig. 3, the first oil passage 71 is disposed in the middle of the input shaft 7, an oil inlet 72 is disposed on the input shaft 7, and two ends of the oil inlet 72 are respectively communicated with the transition groove 21 and the first oil passage 71. The input shaft 7 is provided with an oil inlet hole 72 communicating with the outside so as to communicate the first oil passage 71 and the transition groove 21 in the middle of the input shaft 7 through the oil inlet hole 72.

Preferably, the first oil passage 71 extends in the axial direction of the input shaft 7, the second oil passage 81 is provided in the middle of the main shaft 8 and extends in the axial direction of the main shaft 8, and the second oil passage 81 is provided with a plurality of second oil injection holes 82 at intervals to facilitate uniform injection of the lubricating oil. A connecting pipe is fixedly arranged on the first oil channel 71 in a penetrating manner, and the other end of the connecting pipe is in clearance fit with the second oil channel 81, so that the main shaft 8 can rotate relative to the connecting pipe, and the first oil channel 71 and the second oil channel 81 are communicated through the connecting pipe.

Preferably, the transition groove 21 is annular, at least two oil inlets 72 are arranged on the circumferential direction of the input shaft 7, and the contact area between the annular transition groove 21 and the oil inlets 72 is large, so that lubricating oil can conveniently enter the oil inlets 72 from the transition groove 21. At least two oil inlet holes 72 are formed in the circumferential direction of the input shaft 7, so that lubricating oil can enter the first oil passage 71 quickly. For example, the input shaft 7 is provided with two oil inlet holes 72, the two oil inlet holes 72 are perpendicular to the first oil passage 71, and the transition groove 21 is provided around the oil inlet holes 72.

The gearbox lubrication system also comprises an intermediate shaft (not shown in the figures) provided on the front casing 1; the oil pump body 3 is connected to the front end of the intermediate shaft. Compare the oil pump among the prior art and locate the jackshaft rear end, can occupy the axial length and the occupation space of gearbox rear housing rear side to can occupy a jackshaft rear end interface. The jackshaft front end is located to the oil pump body 3 of this structure, and the axial space of 7 front ends of input shaft itself is occupied by motor and engine isotructure, and the axial space that the jackshaft front end can not occupy the gearbox in addition is located to oil pump body 3 to do not occupy the jackshaft rear end interface, accessible jackshaft rear end interface connection power takeoff and speed regulator, in order to expand the gearbox type register.

Optionally, the oil pump is an internal gear pump, and the rotor shaft of the oil pump body 3 is connected with an intermediate shaft, and the intermediate shaft rotates to drive the oil pump rotor shaft to rotate to pump oil.

As a first alternative embodiment of the embodiment 1, the transition groove 21 may also be an arc-shaped groove as long as the oil inlet hole 72 thereof can communicate with the transition groove 21 when the input shaft 7 rotates. The number of the oil inlet holes 72 on the input shaft 7 can be one, three or the like, and the oil inlet holes 72 can also be obliquely arranged on the input shaft 7; or the oil inlet 72 is not provided, the first oil passage 71 is obliquely arranged on the input shaft 7, the outer end of the first oil passage 71 is communicated with the transition groove 21, and the inner end is obliquely communicated with the second oil passage 81 inwards. As a further modification, it is also possible to omit the transition groove 21 and communicate the second oil outlet 53 and the first oil passage 71 through an oil pipe.

As a second alternative embodiment of embodiment 1, the oil inlet channel 4 may also be an oil inlet pipe, the oil outlet channel 5 is an oil outlet pipe, the oil inlet pipe is communicated with the oil inlet of the oil pump body 3, the oil outlet pipe is communicated with the oil outlet of the oil pump body 3, and the oil inlet pipe and the oil outlet pipe are disposed in the oil pump housing 2 or outside the oil pump housing 2.

Example 2

The present embodiment provides a vehicle including the transmission lubrication system of embodiment 1. The vehicle may be a domestic vehicle, a commercial vehicle, or an engineering work vehicle, etc.

Gearbox lubricating system inside the vehicle sets up the oil pump housing 2 outside casing 1 in the front, with oil pump body 3 integrated between casing 1 and oil pump housing 2 in the front, oil pump body 3 is located between motor and the gearbox procapsid 1, can not increase the holistic axial length of gearbox, gearbox lubricating system simple structure, occupation space is little.

According to the above description, the present patent application has the following advantages:

1. the oil pump body 3 is integrated between the oil pump shell 2 and the front gearbox shell 1 and is positioned between the gearbox and the motor, the arrangement is simple, and the overall length of the gearbox cannot be increased;

2. the oil pump body 3 is connected to the front end of the intermediate shaft, so that an interface at the rear end of the intermediate shaft is not occupied, and the gearbox can be simultaneously integrated with a power takeoff and a speed reducer at the rear end of the intermediate shaft;

3. lubricating oil is sprayed out from the two oil paths, is sprayed to the gear from the oil spraying pipe 6 and is sprayed to parts near the main shaft 8 from the main shaft 8, almost all parts of a transmission system can be lubricated, and the lubricating effect is greatly improved;

4. the oil inlet channel 4 and the oil outlet channel 5 of the oil pump body 3 are formed by the oil pump shell 2 and the oil groove on the front gearbox shell 1 together, so that the number of parts such as an oil conveying pipe is reduced;

5. the whole lubricating system is arranged inside the gearbox shell, and a fault point that oil pipelines are arranged outside the gearbox shell to cause oil leakage easily is avoided.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A transmission lubrication system, comprising:

a front case (1);

an oil pump housing (2) disposed opposite to the front housing (1) and connected to the front housing (1);

the oil pump body (3) is arranged between the front shell (1) and the oil pump shell (2).

2. Gearbox lubrication system according to claim 1, characterised in that between the front housing (1) and the oil pump housing (2) there are provided an oil inlet channel (4) and an oil outlet channel (5) communicating with the oil pump body (3), respectively.

3. Gearbox lubrication system according to claim 2, characterised in that the oil inlet channel (4) is enclosed by oil inlet grooves (41) respectively formed between the front housing (1) and the oil pump housing (2); the oil outlet channel (5) is formed by enclosing an oil outlet groove (51) which is respectively formed between the front shell (1) and the oil pump shell (2).

4. Gearbox lubrication system according to claim 2 or 3, characterised in that said oil outlet channel (5) is provided with a first oil outlet (52); the gearbox lubrication system further comprises:

the oil spraying pipe (6) is arranged in the front shell (1) and communicated with the first oil outlet (52), and a first oil spraying hole (61) is formed in the oil spraying pipe (6).

5. Gearbox lubrication system according to claim 2 or 3, characterised in that a second oil outlet (53) is provided in the oil outlet channel (5); the gearbox lubrication system further comprises:

an input shaft (7) provided to the oil pump housing (2) and the front housing (1); a first oil channel (71) is arranged on the input shaft (7); the first oil passage (71) communicates with the second oil outlet (53);

a main shaft (8) provided inside the input shaft (7); a second oil channel (81) is arranged on the main shaft (8), the second oil channel (81) is communicated with the first oil channel (71), and the second oil channel (81) extends from one end of the main shaft (8) to the other end of the main shaft (8); and a second oil spray hole (82) communicated with the second oil duct (81) is formed in the main shaft (8).

6. The gearbox lubrication system according to claim 5, wherein a transition groove (21) is formed in the oil pump housing (2), and two ends of the transition groove (21) are respectively communicated with the second oil outlet (53) and the first oil channel (71).

7. The gearbox lubrication system according to claim 6, wherein the first oil channel (71) is arranged in the middle of the input shaft (7), an oil inlet hole (72) is formed in the input shaft (7), and two ends of the oil inlet hole (72) are respectively communicated with the transition groove (21) and the first oil channel (71).

8. Gearbox lubrication system according to claim 7 characterised in that the transition groove (21) is annular and/or that the input shaft (7) is provided with at least two oil inlet holes (72) in the circumferential direction.

9. Gearbox lubrication system according to any of claims 1-3, characterised by further comprising an intermediate shaft provided on the front housing (1); the oil pump body (3) is connected with the front end of the intermediate shaft.

10. A vehicle comprising a gearbox lubrication system according to any of claims 1-9.

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