CN220016030U - Transfer case - Google Patents

Abstract

The utility model relates to the field of engineering machinery and discloses a transfer case which comprises a case body, a power transmission assembly, an oil return lubrication assembly and a radiator, wherein the oil return lubrication assembly is arranged outside the case body and is used for sucking oil liquid at the bottom of the case body from an oil outlet at the bottom of the case body to an oil inlet at the top of the case body so as to lubricate the power transmission assembly by the oil liquid; the radiator is arranged outside the box body and used for radiating the oil pumped out from the oil outlet of the box body by the oil return lubrication assembly. By arranging the oil return lubrication assembly, forced oil return lubrication is added on the basis of splash lubrication, so that lubrication and heat dissipation of the power transmission assembly in the box body are more sufficient; through setting up the radiator, can carry back in the box after carrying out the heat dissipation with the fluid of the suction in the oil return lubrication assembly follow box, further improve the heat dispersion to the inside power transmission assembly of box, can guarantee the abundant lubrication and the heat dissipation of power transmission assembly on the whole, improved power transmission assembly's life.

Description

Transfer case

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to a transfer case.

Background

Transfer cases, i.e., devices that distribute power from an engine, may output power to the rear axle, or to both the front and rear axles. The transfer case for the engineering machinery at present mainly has the following defects: firstly, the transfer case is internally lubricated and radiated to the gears and the internal bearings mainly by means of splash lubrication, so that the problems that the lubrication of internal parts is insufficient, the internal parts are easy to overheat, the abrasion is aggravated, and early failure is caused exist. Second, the assemblability is poor. Finally, the high-temperature gasification of the oil in the tank is easy to evaporate from the respirator in the working process, and the oil seeps into the respirator after condensing outside the tank.

Disclosure of Invention

The utility model aims to provide a transfer case which can ensure sufficient lubrication and heat dissipation of a power transmission assembly and prolong the service life of the power transmission assembly.

To achieve the purpose, the utility model adopts the following technical scheme:

a transfer case, comprising:

a case;

the power transmission assembly is arranged in the box body and is used for transmitting and distributing power;

the oil return lubrication assembly is arranged outside the box body and is used for sucking oil liquid at the bottom of the box body from an oil outlet at the bottom of the box body to an oil inlet at the top of the box body so as to lubricate the power transmission assembly by the oil liquid;

the radiator is arranged outside the box body and used for radiating the oil pumped out from the oil outlet of the box body by the oil return lubrication assembly.

As a preferred technical scheme of the transfer case, the oil return lubrication assembly comprises an oil pump, a first oil pipe and a second oil pipe, wherein an oil inlet of the oil pump is communicated with one end of the first oil pipe, the other end of the first oil pipe is communicated with an oil outlet of the case body, an oil outlet of the oil pump is communicated with one end of the second oil pipe, and the other end of the second oil pipe is communicated with an oil inlet of the case body; the radiator is arranged on the second oil pipe.

As a preferred solution of the transfer case, the transfer case further comprises an oil filter, the oil filter is disposed on the second oil pipe, and the oil filter is located upstream of the radiator.

As a preferred solution of the transfer case, the power transmission assembly includes:

the input assembly comprises an input shaft and an input gear, the input gear is fixedly arranged on the input shaft, first bearings are arranged on two sides of the input shaft, and the first bearings are used for rotatably supporting the input shaft on the box body;

the output assembly comprises an output shaft and output gears, the output gears are fixedly arranged on the output shaft, the output gears are meshed with the input gears, a plurality of output gears in the output assembly are distributed at intervals along the circumferential direction of the input gears, the output shafts are respectively provided with second bearings on two sides of the output gears, and the second bearings are used for rotatably supporting the output shaft on the box body.

As the preferable technical scheme of the transfer case, the number of the output components is three, and the connecting lines of the central points of the three groups of the output components are isosceles triangles or equilateral triangles;

the oil inlet channel is arranged on the box body and is opposite to the oil inlet of the box body, the oil inlet channel can split oil entering the box body from the oil inlet of the box body into two streams, one stream of oil can flow to one side face of an output gear in a group of output assemblies positioned at the top and one side wall of the box body, and the other stream of oil can flow to the other side face of the output gear in a group of output assemblies positioned at the top and the other side wall of the box body;

the two side walls of the box body are respectively provided with a diversion channel, and the diversion channels can divert oil flowing down from the oil inlet channels and oil splashed to the side walls to the positions of the first bearing and the second bearing at the corresponding sides.

As a preferred technical solution of the transfer case, the diversion channel includes:

the two first drainage ribs jointly form a first diversion channel, and the first diversion channel is used for guiding oil flowing out of the diversion channel to the second bearing position on the corresponding side of the group of output assemblies at the vertex;

the two second drainage ribs are positioned below the first drainage ribs, and form a second diversion channel together, and the second diversion channel is used for guiding oil splashed to the side wall between the first drainage ribs and the second drainage ribs to the first bearing on the corresponding side;

the four third drainage ribs are located below the second drainage ribs or the first drainage ribs, the four third drainage ribs are two by two in one, each group of third drainage ribs form a third flow guide channel, the two third flow guide channels are in one-to-one correspondence with the two groups of output components located at the bottom point, and the third flow guide channels are used for guiding oil splashed to the side wall between the second drainage ribs and the third drainage ribs or the first drainage ribs to the second bearing position located at the corresponding side of the bottom point in the output components.

As the preferable technical scheme of the transfer case, the input shaft and the input gear are of an integrated structure, and the output shaft and the output gear are of an integrated structure.

As the preferred technical scheme of transfer case, one side of box is provided with just to the first assembly mouth of input shaft and input gear, the diameter of first assembly mouth is greater than the diameter of input gear, first assembly mouth department can dismantle and be connected with first flange, wherein be close to the outer lane of a first bearing of first flange is fixed in on the first flange.

As the preferred technical scheme of transfer case, the opposite side of box is provided with just to output shaft and output gear's second assembly mouth, the diameter of second assembly mouth is greater than output gear's diameter, second assembly mouth department can dismantle and be connected with the second flange, wherein be close to the outer lane of a second bearing of second flange is fixed in on the second flange.

As the preferred technical scheme of transfer case, still include ventilation unit, ventilation unit with the box intercommunication, be provided with in the box with the exhaust passage of ventilation unit intercommunication, just the axis of exhaust passage with ventilation unit's axis is mutually perpendicular.

The utility model has the beneficial effects that:

according to the transfer case, the forced oil return lubrication is added on the basis of keeping splash sliding by arranging the oil return lubrication assembly, so that lubrication and heat dissipation of the power transmission assembly in the case body are more sufficient; in addition, through setting up the radiator, can carry back in the box after carrying out the heat dissipation with the fluid of oil return lubrication assembly follow the suction in the box again, can further improve the heat dispersion to the inside power transmission assembly of box, can guarantee the abundant lubrication and the heat dissipation of power transmission assembly on the whole, improved power transmission assembly's life.

Drawings

FIG. 1 is a cross-sectional view of a transfer case provided by an embodiment of the present utility model;

FIG. 2 is a left side view of a transfer case provided by an embodiment of the present utility model;

FIG. 3 is a schematic diagram of oil return of a transfer case in an oil inlet channel for diversion according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a flow directing channel on a side wall of a transfer case according to an embodiment of the present utility model;

FIG. 5 is a schematic illustration of a flow directing channel on another side wall of a transfer case provided in an embodiment of the present utility model;

FIG. 6 is a partial cross-sectional view of a transfer case provided by an embodiment of the present utility model.

In the figure:

10. a case; 11. an oil outlet; 12. an oil inlet; 13. an oil inlet passage; 14. an exhaust passage;

21. an input shaft; 22. an input gear; 23. a first bearing; 24. an output shaft; 25. an output gear; 26. a second bearing;

31. an oil pump; 32. a first oil pipe;

41. a first drainage rib; 42. the second drainage ribs; 43. a third drainage rib;

51. a first flange; 52. a second flange;

60. and a ventilation device.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 6, an embodiment of the present utility model provides a transfer case, which includes a case 10, a power transmission assembly, an oil return lubrication assembly, and a radiator, wherein the power transmission assembly is disposed in the case 10, and is used for transmitting and distributing power; the oil return lubrication assembly is arranged outside the box body 10 and is used for sucking oil liquid at the bottom of the box body 10 from an oil outlet 11 at the bottom of the box body 10 to an oil inlet 12 at the top of the box body 10 so as to lubricate the power transmission assembly by the oil liquid; the radiator is arranged outside the box body 10 and is used for radiating the oil pumped out by the oil return lubrication assembly from the oil outlet 11 of the box body 10. By arranging the oil return lubrication assembly, forced oil return lubrication is added on the basis of keeping splash sliding, so that lubrication and heat dissipation of the power transmission assembly in the box body 10 are more sufficient; in addition, through setting up the radiator, can carry back into the box 10 after carrying out the heat dissipation with the fluid of oil return lubrication assembly follow the suction in the box 10, can further improve the heat dispersion to the inside power transmission subassembly of box 10, can guarantee the abundant lubrication and the heat dissipation of power transmission subassembly on the whole, improved power transmission subassembly's life.

Referring to fig. 2, the oil return lubrication assembly includes an oil pump 31, a first oil pipe 32 and a second oil pipe (not shown in the figure), an oil inlet of the oil pump 31 is communicated with one end of the first oil pipe 32, the other end of the first oil pipe 32 is communicated with an oil outlet 11 of the tank 10, an oil outlet of the oil pump 31 is communicated with one end of the second oil pipe, and the other end of the second oil pipe is communicated with an oil inlet 12 of the tank 10; a radiator (not shown) is provided on the second oil pipe. The radiator may be a fin-tube radiator or an air-cooled radiator, but is not limited thereto, and the structure of the radiator is the prior art and will not be described in detail herein.

The transfer case provided in this embodiment further includes an oil filter (not shown) disposed on the second oil line, with the oil filter being located upstream of the radiator. Through setting up the oil filter, can filter the impurity in the fluid, avoid impurity to get into the radiator and flow back to in the box 10, improved the life of radiator and power transmission subassembly.

Referring to fig. 1, the power transmission assembly includes an input assembly and a plurality of groups of output assemblies, the input assembly includes an input shaft 21 and an input gear 22, the input shaft 21 is used for driving connection with the engine, the input gear 22 is fixedly arranged on the input shaft 21, the input shaft 21 is provided with first bearings 23 on both sides of the input gear 22, and the first bearings 23 are used for rotatably supporting the input shaft 21 on the box 10; each output assembly comprises an output shaft 24 and an output gear 25, the output gears 25 are fixedly arranged on the output shafts 24, the output gears 25 are meshed with the input gears 22, a plurality of output gears 25 in the output assembly are distributed at intervals along the circumferential direction of the input gears 22, the output shafts 24 are provided with second bearings 26 on two sides of the output gears 25, and the second bearings 26 are used for rotatably supporting the output shafts 24 on the box body 10. In this embodiment, referring to fig. 2, the number of output components is three, and the connection lines of the central points of the three output components are isosceles triangles or equilateral triangles. The input gear 22 and the output gears 25 of the two output modules at the bottom point are located at the lower part of the tank 10, and can contact the oil located at the bottom of the tank 10, so that the oil can splash for lubrication. The remaining components in the power transmission assembly can be lubricated by forced oil return.

Specifically, referring to fig. 3, an oil inlet channel 13 is provided on the tank 10, which is opposite to the oil inlet 12 of the tank 10, the oil inlet channel 13 can split the oil entering the tank 10 from the oil inlet 12 of the tank 10 into two streams, wherein one stream of oil can flow to one side face of the output gear 25 in the group of output components located at the vertex and one side wall of the tank 10, and the other stream of oil can flow to the other side face of the output gear 25 in the group of output components located at the vertex and the other side wall of the tank 10; the two side walls of the box body 10 are respectively provided with a diversion channel, and the diversion channels can divert the oil flowing down from the oil inlet channel 13 and the oil splashed on the side walls to the positions of the first bearing 23 and the second bearing 26 on the corresponding sides.

Specifically, referring to fig. 4 and 5, the flow guiding channel includes two first flow guiding ribs 41, two second flow guiding ribs 42 and four third flow guiding ribs 43, the two first flow guiding ribs 41 together form a first flow guiding channel, and the first flow guiding channel is used for guiding oil flowing out of the flow guiding channel to the second bearing 26 located at the corresponding side of the group of output components at the vertex; the second drainage ribs 42 are located below the first drainage ribs 41, and the two second drainage ribs 42 together form a second diversion channel which is used for guiding oil splashed to the side wall between the first drainage ribs 41 and the second drainage ribs 42 to the position of the first bearing 23 on the corresponding side; the third drainage ribs 43 are located below the second drainage ribs 42 or the first drainage ribs 41 (fig. 4 shows an example that the third drainage ribs 43 are located below the second drainage ribs 42, fig. 5 shows an example that the third drainage ribs 43 are located below the first drainage ribs 41), four third drainage ribs 43 are grouped in pairs, each group of third drainage ribs 43 forms a third diversion channel, two third diversion channels are in one-to-one correspondence with two groups of output components located at the bottom point, and the third diversion channels are used for guiding oil splashed to the side wall between the second drainage ribs 42 and the third drainage ribs 43 or between the second drainage ribs 42 and the first drainage ribs 41 to the second bearing 26 located at the corresponding side of the corresponding output components at the bottom point.

By the cooperation of the oil inlet channel 13 and the flow guide channel, the oil return lubrication assembly conveys the oil return flow into the box 10 to the rest parts except the input gear 22 and the output gears 25 in the two groups of output assemblies at the bottom point, so that the lubrication of all the parts of the power transmission assembly is realized, and the lubrication is sufficient.

Referring to fig. 1, in the present embodiment, the input shaft 21 and the input gear 22 are integrally formed, and the output shaft 24 and the output gear 25 are integrally formed. The matching connection structure between the input shaft 21 and the input gear 22 and between the output shaft 24 and the output gear 25 is omitted, so that the shaft is free of excessive parts, and the processing and the assembly are convenient.

One side of the case 10 is provided with a first fitting opening facing the input shaft 21 and the input gear 22, the diameter of the first fitting opening is larger than that of the input gear 22, and a first flange 51 is detachably connected to the first fitting opening, wherein an outer ring of one first bearing 23 close to the first flange 51 is fixed on the first flange 51. The other side of the box 10 is provided with a second assembly opening facing the output shaft 24 and the output gear 25, the diameter of the second assembly opening is larger than that of the output gear 25, a second flange 52 is detachably connected to the second assembly opening, and the outer ring of one second bearing 26 close to the second flange 52 is fixed on the second flange 52. The input shaft 21 and the input gear 22 can be directly assembled from the first assembly port, and the output shaft 24 and the output gear 25 can be directly assembled from the second assembly port, so that the assembly method is simple and reliable.

In addition, referring to fig. 6, the transfer case provided in this embodiment further includes a ventilation device 60, the ventilation device 60 is communicated with the case 10, an exhaust channel 14 that is communicated with the ventilation device 60 is disposed in the case 10, and an axis of the exhaust channel 14 is perpendicular to an axis of the ventilation device 60. By arranging the exhaust passage 14, high-temperature oil gas can be prevented from directly evaporating from the ventilation device 60, and the problem of oil seepage of the ventilation device 60 is solved.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Transfer case, its characterized in that includes:

a case (10);

the power transmission assembly is arranged in the box body (10) and is used for transmitting and distributing power;

the oil return lubrication assembly is arranged outside the box body (10) and is used for sucking oil liquid at the bottom of the box body (10) from an oil outlet (11) at the bottom of the box body (10) to an oil inlet (12) at the top of the box body (10) so as to lubricate the power transmission assembly by the oil liquid;

the radiator is arranged outside the box body (10) and is used for radiating oil pumped out of the oil outlet (11) of the box body (10) by the oil return lubrication assembly.

2. The transfer case according to claim 1, characterized in that the oil return lubrication assembly comprises an oil pump (31), a first oil pipe (32) and a second oil pipe, an oil inlet of the oil pump (31) is communicated with one end of the first oil pipe (32), the other end of the first oil pipe (32) is communicated with an oil outlet (11) of the case (10), an oil outlet of the oil pump (31) is communicated with one end of the second oil pipe, and the other end of the second oil pipe is communicated with an oil inlet (12) of the case (10); the radiator is arranged on the second oil pipe.

3. The transfer case of claim 2, further comprising an oil filter disposed on the second oil line, the oil filter being upstream of the radiator.

4. The transfer case of any one of claims 1-3, wherein the power transmission assembly comprises:

the input assembly comprises an input shaft (21) and an input gear (22), wherein the input gear (22) is fixedly arranged on the input shaft (21), first bearings (23) are arranged on two sides of the input gear (22) of the input shaft (21), and the first bearings (23) are used for rotatably supporting the input shaft (21) on the box body (10);

the output assembly comprises an output shaft (24) and output gears (25), the output gears (25) are fixedly arranged on the output shaft (24), the output gears (25) are meshed with the input gears (22), a plurality of output gears (25) in the output assembly are distributed at intervals in the circumferential direction of the input gears (22), the output shaft (24) is provided with second bearings (26) on two sides of the output gears (25), and the second bearings (26) are used for rotatably supporting the output shaft (24) in the box body (10).

5. The transfer case of claim 4, wherein the number of output assemblies is three, and the lines of the central points of the three output assemblies are isosceles triangles or equilateral triangles;

an oil inlet channel (13) opposite to an oil inlet (12) of the box body (10) is arranged on the box body (10), the oil inlet channel (13) can split oil entering the box body (10) from the oil inlet (12) of the box body (10) into two streams, one stream of oil can flow to one side face of an output gear (25) in a group of output assemblies positioned at the top and one side wall of the box body (10), and the other stream of oil can flow to the other side face of the output gear (25) in the group of output assemblies positioned at the top and the other side wall of the box body (10);

two side walls of the box body (10) are respectively provided with a diversion channel, and the diversion channels can divert oil flowing down from the oil inlet channel (13) and oil splashed to the side walls to the positions of the first bearing (23) and the second bearing (26) at the corresponding sides.

6. The transfer case of claim 5, wherein the diversion channel comprises:

the two first drainage ribs (41) jointly form a first diversion channel, and the first diversion channel is used for guiding oil flowing out of the diversion channel to the second bearing (26) on the corresponding side of the group of output assemblies at the vertex;

the two second drainage ribs (42), the second drainage ribs (42) are located below the first drainage ribs (41), the two second drainage ribs (42) together form a second diversion channel, and the second diversion channel is used for guiding oil splashed to the side wall between the first drainage ribs (41) and the second drainage ribs (42) to the position of the first bearing (23) on the corresponding side;

the four third drainage ribs (43), third drainage rib (43) are located second drainage rib (42) or the below of first drainage rib (41), four third drainage rib (43) are two by two in one, every group third drainage rib (43) form a third water conservancy diversion passageway, two third water conservancy diversion passageway with be located two sets of output subassembly one-to-one of bottom, the third water conservancy diversion passageway is used for splashing second drainage rib (42) with the fluid of lateral wall between third drainage rib (43) or first drainage rib (41) is directed to be located the bottom correspond in the output subassembly corresponds side second bearing (26).

7. The transfer case of claim 4 wherein said input shaft (21) is of unitary construction with said input gear (22) and said output shaft (24) is of unitary construction with said output gear (25).

8. The transfer case of claim 4 wherein a first mounting opening is provided on one side of the case (10) opposite the input shaft (21) and the input gear (22), the first mounting opening having a diameter greater than the diameter of the input gear (22), a first flange (51) being removably connected to the first mounting opening, wherein an outer race of a first bearing (23) adjacent the first flange (51) is secured to the first flange (51).

9. The transfer case of claim 4 wherein a second mounting port is provided on the other side of the case (10) opposite the output shaft (24) and the output gear (25), the second mounting port having a diameter greater than the diameter of the output gear (25), a second flange (52) being removably attached to the second mounting port, wherein an outer race of a second bearing (26) adjacent the second flange (52) is secured to the second flange (52).

10. A transfer case according to any one of claims 1-3, further comprising venting means (60), said venting means (60) being in communication with said case (10), an exhaust passage (14) being provided in said case (10) in communication with said venting means (60), and the axis of said exhaust passage (14) being perpendicular to the axis of said venting means (60).