Amphibious transfer case

Abstract

The utility model relates to the technical field of power transmission, in particular to an amphibious transfer case which comprises a case body and an input shaft, and the input shaft is inserted into the case body and rotationally connected with the case body; the output shaft is inserted into the box body and is rotationally connected with the box body; the transmission component is arranged between the input shaft and the output shaft, and the input shaft drives the output shaft to rotate through the transmission component; the clutch assembly comprises an outer abrasive disc and an inner abrasive disc, the outer abrasive disc and the inner abrasive disc are connected to the output shaft and the transmission assembly respectively, a separation spring is arranged between the inner abrasive disc and the outer abrasive disc, and the inner abrasive disc and the outer abrasive disc can move close to each other and away from each other; transmission between the output shaft and the transmission assembly is achieved through friction between the inner abrasive disc and the outer abrasive disc. The separation spring is arranged between the inner abrasive disc and the outer abrasive disc, so that during oil drainage, under the action of the separation spring, separation of the inner abrasive disc and the outer abrasive disc can be accelerated, and the effects of lubricating the inner abrasive disc and the outer abrasive disc and cooling the inner abrasive disc and the outer abrasive disc are achieved.

Description

Technical Field

[0001] This application relates to the technical field of power transmission, and particularly to an amphibious transfer case. Background Art

[0002] The transfer case is one of the key components in the power system, and it can distribute the power of the engine for multiple outputs.

[0003] The clutch mechanism of the transfer case is usually a friction plate group arranged between the input shaft and the output shaft. In the existing transfer case, a piston is set, and the piston is pushed hydraulically, so as to push the friction plates closer to each other to make the friction plates fit together, and the transmission between the input shaft and the output shaft is realized through the frictional force between the friction plates.

[0004] However, when the hydraulic system leaks oil, the separation between the friction plates has a lag, resulting in poor braking timeliness and short service life of the friction plates. Utility Model Content

[0005] This utility model aims to solve one of the technical problems in the background art.

[0006] To this end, this utility model provides an amphibious transfer case.

[0007] The technical solution adopted by this utility model to solve its technical problems is:

[0008] An amphibious transfer case, comprising

[0009] a box body, and

[0010] an input shaft, the input shaft is inserted on the box body and rotatably connected to the box body;

[0011] an output shaft, the output shaft is inserted on the box body and rotatably connected to the box body;

[0012] a transmission component, the transmission component is arranged between the input shaft and the output shaft, and the input shaft drives the output shaft to rotate through the transmission component;

[0013] a clutch component, the clutch component includes an outer friction plate and an inner friction plate, the outer friction plate and the inner friction plate are respectively connected to the output shaft and the transmission component, a separation spring is arranged between the inner friction plate and the outer friction plate, the inner friction plate and the outer friction plate can move closer to and away from each other, and the transmission between the output shaft and the transmission component is realized through friction between the inner friction plate and the outer friction plate.

[0014] Further, the transmission assembly includes a main gear and a toothed ring. The main gear is coaxially and fixedly connected to the shaft of the input shaft inside the box body. A toothed ring is coaxially sleeved on the shaft of the output shaft inside the box body. The main gear meshes with the toothed ring. The inner grinding plate is connected to the toothed ring, and the outer grinding plate is connected to the output shaft.

[0015] Further, multiple inner grinding plates and outer grinding plates can be provided. The multiple inner grinding plates and outer grinding plates are alternately and spaced apart from each other.

[0016] Further, end face tooth structures are provided on both sides of the outer grinding plate and the inner grinding plate.

[0017] Further, a limit shell is coaxially and fixedly connected to the shaft of the output shaft inside the box body. A piston is arranged inside the limit shell. The piston is slidably matched with the output shaft along the axial direction of the output shaft. The piston is used to push the inner grinding plate and the outer grinding plate to move closer to each other. An oil cavity is formed between the piston and the limit shell.

[0018] Further, the toothed ring and the output shaft are connected through a support bearing. Multiple support bearings are provided. A spacer is arranged between the support bearings. The spacer forms a lubrication cavity between adjacent support bearings. A main spring is sleeved on the output shaft. One end of the main spring abuts against the support bearing, and the other end abuts against the piston.

[0019] Further, the output shaft penetrates through the side wall at one end of the box body and is rotatably connected to the inner side wall at the other end of the box body through a rotating bearing. A lubrication cavity is formed among the output shaft, the inner side wall of the box body, and the rotating bearing.

[0020] Further, an oil pump is further included. The oil pumping port of the oil pump is communicated with the oil cavity through a first oil pipe.

[0021] Further, the oil pumping port of the oil pump is communicated with the lubrication cavity through a second oil pipe.

[0022] Further, a drain pipe is connected between the first oil pipe and the box body. The drain pipe is communicated with the internal cavity of the box body. An electromagnetic valve is connected to the drain pipe. A drain pipe is connected between the oil inlet of the oil pump and the box body.

[0023] The beneficial effect of the present utility model is that by arranging a separation spring between the inner grinding plate and the outer grinding plate in this application, when draining oil, under the action of the separation spring, the separation of the inner and outer grinding plates can be accelerated, and the separation spring makes the inner and outer grinding plates always have a certain gap, so that hydraulic oil can enter between the inner and outer grinding plates to lubricate the inner and outer grinding plates and take away the heat, reduce the temperature of the end face teeth, and improve the service life of the inner and outer grinding plates. Description of the Drawings

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a schematic structural diagram of the present utility model.

[0026] Figure 2 It is a schematic structural diagram of the present utility model.

[0027] In the figure: 1, input flange; 2, coupling; 3, input shaft; 4, lubrication chamber; 5, box body; 6, installation clearance; 7, through cover; 8, oil pump; 9, oil hole; 10, oil cavity; 11, output shaft; 12, first oil pipe; 13, second oil pipe; 14, piston; 15, main spring; 16, fixed distance ring; 17, support bearing; 18, main gear; 19, tooth ring; 20, drain oil pipe; 21, first oil passage; 22, second oil passage; 23, outer friction plate; 24, separation spring; 25, inner friction plate; 26, solenoid valve; 27, limit shell. Specific embodiments

[0028] The present utility model will now be further described in detail in conjunction with the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0029] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present utility model. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] An amphibious transfer case, comprising a case body 5, an input shaft 3, an output shaft 11, and a clutch assembly.

[0032] The input shaft 3 penetrates through opposite side walls of the case body 5. The input shaft 3 is rotatably connected to the side walls of the case body 5 through two rotating bearings. One end of the input shaft 3 is connected with a coupling 2 for connecting with other power components. The coupling 2 is located at the front side of the case body 5. An input flange 1 is connected to the outer side wall at the front side of the case body 5 for installing the case body 5. A cover 7 is connected to the rear end of the case body 5, and an oil pump 8 is connected to one end of the cover 7 away from the case body 5.

[0033] The output shaft 11 is arranged parallel to the input shaft 3. The rear end of the output shaft 11 penetrates through the rear side wall of the case body 5 and is rotatably connected to the inner side wall at the front side of the case body 5 through a rotating bearing. The output shaft 11 is rotatably connected to the rear side wall of the case body 5 through a rotating bearing. A lubrication cavity 4 is arranged between the output shaft 11 and the inner wall at the front side of the case body 5.

[0034] A transmission member is arranged between the input shaft 3 and the output shaft 11. The input shaft 3 drives the output shaft 11 to rotate through a transmission assembly. The transmission assembly includes a main gear 18 and a gear ring 19. The main gear 18 is coaxially and fixedly connected to the shaft body of the input shaft 3 inside the case body 5. A gear ring 19 is coaxially sleeved on the shaft body of the output shaft 11 inside the case body 5. The main gear 18 meshes with the gear ring 19. An installation gap 6 is formed by arranging a space between the gear ring 19 and the output shaft 11. A receiving groove is arranged on the inner side wall at the front side of the gear ring 19. The gear ring 19 and the output shaft 11 are connected through a support bearing 17. The support bearing 17 is located in the receiving groove. Multiple support bearings 17 can be provided. In this embodiment, two support bearings 17 are provided. A spacer is arranged between the two support bearings 17, and the spacer separates the lubrication cavity 4 between the two support bearings 17. A fixed-distance ring 16 is arranged between the support bearing 17 at the front side and the rotating bearing at the front end of the output shaft 11.

[0035] A limit shell 27 is coaxially and fixedly connected to the shaft body of the output shaft 11 inside the case body 5. The limit shell 27 is integrally formed with the output shaft 11. The limit shell 27 is located at the rear side of the gear ring 19. The opening of the limit shell 27 faces the gear ring 19. The rear end of the gear ring 19 can extend between the limit shell 27 and the output shaft 11. A piston 14 is arranged inside the limit shell 27. The piston 14 is slidably matched with the output shaft 11 along the axial direction of the output shaft 11. The piston 14 is located between the inner bottom of the limit shell 27 and the rear end of the gear ring 19. An avoidance groove is arranged on the piston 14, and the rear end of the gear ring 19 can be inserted into the avoidance groove.

[0036] A main spring 15 is arranged in the installation gap 6. The main spring 15 is sleeved on the output shaft 11. A spacer ring 16 is arranged between the front end of the main spring 15 and the support bearing 17. The rear end of the main spring 15 abuts against the piston 14. An inner friction plate 25 is connected to the gear ring 19, and an outer friction plate 23 is connected to the output shaft 11. Specifically, the outer friction plate 23 is connected to the inner side wall of the limit shell 27. A plurality of inner friction plates 25 and outer friction plates 23 can be arranged. The plurality of inner friction plates 25 and outer friction plates 23 are arranged alternately and at intervals. A separation spring 24 is arranged between the inner friction plate 25 and the outer friction plate 23. End face tooth structures are arranged on both sides of the outer friction plate 2322 and the inner friction plate 2524 to increase the friction force. The piston 14 directly abuts against the outer friction plate 23 or the inner friction plate 25 close to the piston 14. Among them, one inner friction plate 25 far from the piston 14 is fixedly connected to the gear ring 19, or one outer friction plate 23 far from the piston 14 is fixedly connected to the limit shell 27. The other inner friction plates 25 and outer friction plates 23 can all slide axially along the output shaft 11. Thus, under the push of the piston 14, the plurality of inner friction plates 25 and outer friction plates 23 are engaged with each other.

[0037] It should be noted that the piston 14 is hermetically arranged between the output shaft 11 and the inner side wall of the limit shell 27. An oil cavity 10 is formed between the bottoms of the limit shells 27. A first oil passage 21 and a second oil passage 22 are arranged axially along the axis of the output shaft 11. The oil pump 8 is provided with two oil pumping ports and an oil inlet. A drain pipe is connected between the oil inlet of the oil pump 8 and the box body 5. One end of the first oil passage 21 is communicated with the oil cavity 10, and the other end is connected to an oil pumping port of the oil pump 8 through a first oil pipe 12. A plurality of oil holes 9 are arranged on the side wall of the output shaft 11, and the plurality of oil holes 9 are all communicated with the second oil passage 22. One end of the second oil passage 22 is communicated with the installation gap 6 and the lubrication cavity 4 respectively through the plurality of oil holes 9, and the other end is communicated with the other oil pumping port of the oil pump 8 through a second oil pipe 13. A drain pipe 20 is connected between the first oil pipe 12 and the box body 5. The drain pipe 20 is communicated with the internal cavity of the box body 5. An electromagnetic valve 26 is connected to the drain pipe 20.

[0038] The implementation principle of this application is as follows:

[0039] When the input shaft 3 rotates, it drives the oil pump 8 to pump out gear oil, and the gear oil lubricates the output shaft 11 bearing through the oil passage of the lubricating oil port.

[0040] When the electromagnetic valve 26 is closed, the gear oil is pumped to the oil cavity 10 through the oil pump 8, the first oil pipe 12, and the first oil passage 21 to push the piston 14. The piston 14 squeezes the outer friction plate 23 and the inner friction plate 25, so that the outer friction plate 23 and the inner friction plate 25 are combined. The torque is transmitted to the output shaft 11 through the outer friction plate 23. At the same time, the main spring 15 and the separation spring 24 are compressed. There is a small side gap between the end face teeth of the outer friction plate 23 and the inner friction plate 25. The gear oil lubricates the end face teeth and takes away the heat, and the temperature of the end face teeth;

[0041] The gear oil is pumped through the second oil pipe 13, the second oil passage 22, and the oil hole 9 to the installation clearance 6 and the lubrication cavity 4 to lubricate the rotating bearing, the support bearing 17, and the main spring 15.

[0042] When the solenoid valve 26 is closed, the oil pressure in the first oil passage 21 drops, and the gear oil enters the interior of the housing 5 through the drain pipe 20. The oil inside the housing 5 can return to the oil pump 8 through the drain pipe. The oil pressures in the first oil passage 21 and the oil cavity 10 drop, and the compressed main spring 15 and the separation spring 24 quickly reset, pushing the outer friction plate 23 and the inner friction plate 25 to separate quickly. The piston 14 squeezes to separate quickly, achieving a rapid disconnection of the torque of the output shaft 11.

[0043] In summary, in this application, by arranging the separation spring 24 between the inner friction plate 25 and the outer friction plate 23, when draining oil, under the action of the separation spring 24, the separation of the inner and outer friction plates 23 can be accelerated, and the separation spring 24 keeps a certain gap between the inner and outer friction plates 23 all the time, so that the hydraulic oil can enter between the inner and outer friction plates 23 to lubricate the inner and outer friction plates 23 and take away the heat, reducing the temperature of the end face teeth and increasing the service life of the inner and outer friction plates 23.

[0044] Taking the above ideal embodiments of the present utility model as an inspiration, through the above description, relevant workers can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An amphibious transfer case, characterized in that, Comprising, a housing (5), and an input shaft (3), the input shaft (3) being inserted into the housing (5) and rotatably connected to the housing (5); an output shaft (11), the output shaft (11) being inserted into the housing (5) and rotatably connected to the housing (5); a transmission assembly, the transmission assembly being disposed between the input shaft (3) and the output shaft (11), the input shaft (3) driving the output shaft (11) to rotate through the transmission assembly; a clutch assembly, the clutch assembly including an outer friction plate (23) and an inner friction plate (25), the outer friction plate (23) and the inner friction plate (25) being respectively connected to the output shaft (11) and the transmission assembly, a separating spring (24) being disposed between the inner friction plate (25) and the outer friction plate (23), the inner friction plate (25) and the outer friction plate (23) being capable of moving closer to and away from each other, and transmission between the output shaft (11) and the transmission assembly being achieved through friction between the inner friction plate (25) and the outer friction plate (23).

2. The amphibious transfer case according to claim 1, wherein, The transmission assembly includes a main gear (18) and a gear ring (19), the main gear (18) being coaxially and fixedly connected to the shaft body of the input shaft (3) inside the housing (5), a gear ring (19) being coaxially sleeved on the shaft body of the output shaft (11) inside the housing (5), the main gear (18) meshing with the gear ring (19), the inner friction plate (25) being connected to the gear ring (19), and the outer friction plate (23) being connected to the output shaft (11).

3. The amphibious transfer case according to claim 1, wherein, A plurality of the inner friction plates (25) and the outer friction plates (23) may be provided, and the plurality of inner friction plates (25) and the outer friction plates (23) are alternately and spaced apart from each other.

4. The amphibious transfer case according to claim 1, wherein End face tooth structures are provided on both sides of the outer friction plate (23) and the inner friction plate (25).

5. The amphibious transfer case according to claim 2, wherein, A limiting shell (27) is coaxially and fixedly connected to the shaft body of the output shaft (11) inside the housing (5), a piston (14) is disposed inside the limiting shell (27), the piston (14) is slidably engaged with the output shaft (11) along the axial direction of the output shaft (11), the piston (14) is used to push the inner friction plate (25) and the outer friction plate (23) to move closer to each other, and an oil chamber (10) is formed between the piston (14) and the limiting shell (27).

6. The amphibious transfer case according to claim 5, wherein The gear ring (19) is connected to the output shaft (11) through a support bearing (17), a plurality of the support bearings (17) are provided, spacers are provided between the support bearings (17), the spacers form a lubrication chamber (4) between adjacent support bearings (17), a main spring (15) is sleeved on the output shaft (11), one end of the main spring (15) abuts against the support bearing (17), and the other end abuts against the piston (14).

7. The amphibious transfer case according to claim 6, characterized in that, The output shaft (11) penetrates through the side wall at one end of the housing (5) and is rotatably connected to the inner side wall at the other end of the housing (5) through a rotating bearing, and a lubrication chamber (4) is formed between the output shaft (11), the inner side wall of the housing (5), and the rotating bearing.

8. The amphibious transfer case according to claim 6 or 7, characterized in that, It further includes an oil pump (8), and the oil pumping port of the oil pump (8) is communicated with the oil chamber (10) through a first oil pipe (12).

9. The amphibious transfer case according to claim 8, wherein The oil pumping port of the oil pump (8) is communicated with the lubrication cavity (4) through a second oil pipe (13).

10. The amphibious transfer case according to claim 8, wherein, A drain oil pipe (20) is connected between the first oil pipe (12) and the box body (5). The drain oil pipe (20) is communicated with the internal cavity of the box body (5). A solenoid valve (26) is connected to the drain oil pipe (20). A drain pipe is connected between the oil inlet of the oil pump (8) and the box body (5).

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