Water propulsion gearbox for amphibious vehicle

Abstract

The utility model discloses a water propulsion gearbox for an amphibious vehicle, which comprises a box body, an input shaft and an output shaft which are arranged in the box body, an idler shaft and a gear shifting mechanism assembly which are arranged in the box body, and a forward gear and a reverse gear are sleeved on one side of the input shaft in the box body. A sliding gear sleeve is arranged between the forward gear and the reverse gear, the sliding gear sleeve is arranged on the input shaft in the mode that the sliding gear sleeve is fixed in the circumferential direction and not fixed in the axial direction, the gear shifting mechanism assembly is used for pushing the sliding gear sleeve to be connected with the forward gear or the reverse gear, a first gear and a second gear are arranged on the idler shaft, and the first gear is connected with the reverse gear in an engaged mode. An output gear is arranged on the output shaft and is in meshed connection with the second gear and the forward gear at the same time. According to the scheme, the gear shifting mechanism assembly, the reverse gear and the idle wheel assembly are additionally arranged, forward rotation and overturning of the output shaft are achieved under the condition that the rotation direction of the input shaft is not changed, and therefore the requirement that the whole vehicle advances and retreats on water is met.

Description

Technical Field

[0001] The utility model relates to a water-operated power transmission device for an amphibious vehicle, in particular to a water-propulsion gear box for an amphibious vehicle. Background Art

[0002] Some amphibious vehicles on the market adopt the water propulsion layout of engine-land and water clutch transfer case-gear box-jet pump, among which the gear box and the jet pump are special water propulsion systems. There are relatively few types of existing water propulsion gear boxes, mainly single-speed reducers. Since the rotation direction of ordinary engines remains unchanged, the rotation direction of the general reducer output is set to forward propulsion. Therefore, the vehicle cannot move backward on the water surface by its own power. In narrow waterways where it cannot turn, amphibious vehicles need to use external force to achieve direction change. Moreover, the existing water propulsion system does not have a brake, and the land and water clutch transfer case is a wet clutch. Therefore, the water propulsion system is easily affected by the displacement torque of the wet clutch, and displacement operation occurs when it is not working, affecting the working life of the entire propulsion system. The existing marine gearbox has forward and reverse gear functions, but most of them use wet clutch shifting, the shifting mechanism is complex, and the gearbox is large in size and mass. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide an amphibious vehicle water propulsion gearbox with simple structure and high reliability.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A water propulsion gearbox for an amphibious vehicle includes a housing, an input shaft and an output shaft arranged in the housing, an idler shaft and a shift mechanism assembly arranged in the housing, a side of the input shaft located in the housing having a forward gear and a reverse gear, a sliding gear sleeve arranged between the forward gear and the reverse gear, the sliding gear sleeve being arranged on the input shaft in a circumferentially fixed but axially unfixed manner, the shift mechanism assembly being used to push the sliding gear sleeve to engage with the forward gear or the reverse gear, a first gear and a second gear being arranged on the idler shaft, the first gear being meshed and connected with the reverse gear, an output gear being arranged on the output shaft, the output gear being meshed and connected with the second gear and the forward gear at the same time. In this way, by adding the shift mechanism assembly, the reverse gear and the idler assembly, the output shaft can be rotated forward and reversely without changing the rotation direction of the input shaft, thereby satisfying the forward and reverse motion of the vehicle on water.

[0006] As a preference, a brake assembly is also included, the brake assembly including a brake disc and a brake clamp, the brake disc is mounted on the input shaft, and the brake clamp is mounted on the housing. By adding the brake assembly at the input end of the gearbox, the influence of the displacement torque of the conventional wet clutch of the amphibious transfer case is overcome, so that when the vehicle is not working on the water surface, the propulsion system is kept stationary, thereby increasing the service life of the propulsion system.

[0007] Preferably, the brake assembly is a dry brake. By arranging the dry brake, the space of the whole vehicle is effectively utilized while taking into account the assembly processability, making the space of the whole vehicle more compact.

[0008] Preferably, the input shaft and the output shaft are arranged vertically and eccentrically, and the idler shaft is arranged on one side above the output shaft.

[0009] Preferably, one end of the input shaft is supported on the housing through a bearing, and the other end of the input shaft extends out of the housing and is connected to the amphibious clutch transfer case.

[0010] Preferably, one end of the output shaft is supported on the housing through a bearing, and the other end of the output shaft extends out of the housing and is connected to the spray pump.

[0011] Preferably, both ends of the idler shaft are supported on the housing through bearings.

[0012] Preferably, the shift mechanism assembly comprises a shift fork, and the shift fork is used to push the sliding gear sleeve so that the sliding gear sleeve engages with the forward gear or the reverse gear.

[0013] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0014] 1. The water propulsion gearbox for the amphibious vehicle provided by the utility model adds a shift mechanism assembly, a reverse gear and an idler assembly on the basis of the original reducer, and realizes the forward and reverse rotation of the output shaft without changing the rotation direction of the input shaft, thereby meeting the forward and reverse movement of the vehicle on water;

[0015] 2. The utility model overcomes the influence of the displacement torque of the wet clutch in the traditional amphibious transfer case by adding a brake assembly at the input end of the gearbox, so that the propulsion system is kept stationary when the vehicle is not working on the water surface, thereby increasing the service life of the propulsion system;

[0016] 3. The brake assembly in the utility model is a dry brake, which not only takes into account the assembly process, but also effectively utilizes the space of the whole vehicle, making the space of the whole vehicle more compact;

[0017] 4. The water propulsion gearbox for the amphibious vehicle provided by the utility model adopts a sliding sleeve shifting method, which is simple in structure, compact in space and low in cost compared to the traditional wet clutch shifting method of a marine gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a transmission structure schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the meshing of the second gear, the forward gear and the output gear of the utility model.

[0020] Reference numerals:

[0021] 1. Housing; 2. Input shaft; 3. Reverse gear; 4. Forward gear; 5. Sliding gear sleeve; 6. Idle shaft; 7. First gear; 8. Second gear; 9. Output shaft; 10. Output gear; 11. Shift mechanism assembly; 12. Brake assembly; 13. Amphibious clutch transfer case; 14. Injection pump. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] like Figure 1 and Figure 2 The illustrated embodiment of an amphibious vehicle water propulsion gearbox comprises a housing 1 and an input shaft 2 and an output shaft 9 arranged in the housing 1, and also comprises an idler shaft 6 and a shift mechanism assembly 11 arranged in the housing 1. A forward gear 4 and a reverse gear 3 are mounted on one side of the input shaft 2 located in the housing 1. A sliding gear sleeve 5 is arranged between the forward gear 4 and the reverse gear 3. The sliding gear sleeve 5 is arranged on the input shaft 2 in a circumferentially fixed and axially unfixed manner. The shift mechanism assembly 11 is used to push the sliding gear sleeve 5 to engage with the forward gear 4 or the reverse gear 3. A first gear 7 and a second gear 8 are arranged on the idler shaft 6. The first gear 7 is meshedly connected to the reverse gear 3. An output gear 10 is arranged on the output shaft 9. The output gear 10 is meshedly connected to the second gear 8 and the forward gear 4 at the same time. Among them, the forward gear 4 and the output gear 10 are meshed as a primary gear transmission, so the input shaft 2 and the output shaft 9 have opposite directions; the second gear 8 on the idler shaft 6 and the output gear 10 on the output shaft 9 are meshed as a secondary gear transmission, so the input shaft 2 and the output shaft 9 have the same direction. In this way, by adding the shift mechanism assembly 11, the reverse gear 3 and the idler assembly, the output shaft 9 can rotate forward and reverse without changing the rotation direction of the input shaft 2, thereby meeting the forward and reverse directions of the vehicle on water.

[0028] In this solution, a brake assembly 12 is also included, and the brake assembly 12 includes a brake disc and a brake clamp, the brake disc is mounted on the input shaft 2, and the brake clamp is mounted on the housing 1. The rotation and braking of the input shaft 9 are controlled by pressing or releasing the brake disc by the brake clamp on the brake assembly 12.

[0029] In the present invention, the brake assembly 12 is a dry brake. In this way, while taking into account the assembly processability, the vehicle space is effectively utilized to make the vehicle space more compact.

[0030] like Figure 1 and Figure 2 As shown, the input shaft 2 and the output shaft 9 are arranged vertically and eccentrically, and the idler shaft 6 is arranged on one side above the output shaft 9 .

[0031] In the present invention, one end of the input shaft 2 is supported on the housing 1 through a bearing, and the other end of the input shaft 2 is connected to the amphibious clutch transfer case 13 after extending out of the housing 1. One end of the output shaft 9 is supported on the housing 1 through a bearing, and the other end of the output shaft 9 is connected to the spray pump 14 after extending out of the housing 1. Both ends of the idler shaft 6 are supported on the housing 1 through bearings.

[0032] The shift mechanism assembly 11 includes a shift fork, which is used to push the sliding gear sleeve 5 so that the sliding gear sleeve 5 is engaged with the forward gear 4 or the reverse gear 3 .

[0033] The specific working implementation method of the water propulsion gearbox of the amphibious vehicle provided by the utility model is:

[0034] When the amphibious vehicle is running on water, the wet clutch of the amphibious vehicle's water-land clutch transfer case 13 connected to the input shaft 9 on the water propulsion gear box is engaged, the brake clamp on the brake assembly 12 releases the brake disc, and the input shaft 2 connected to the brake disc can rotate freely. When the shift fork on the shift mechanism assembly 11 pushes the sliding gear sleeve 5 to engage with the forward gear 4, power is input from the input shaft 2, and is transmitted to the output shaft 9 through the meshing of the forward gear 4 and the output gear 10. The output shaft 9 transmits the power to the spray pump 14, and the input shaft 2 In the opposite direction to the rotation of the output shaft 9, the forward gear power transmission is realized through the primary gear transmission; when the shift fork on the shift mechanism assembly 11 pushes the sliding gear sleeve 5 to engage with the reverse gear 3, the power is input from the input shaft 2, and is transmitted to the idler shaft 6 through the meshing of the reverse gear 3 and the first gear 7 on the idler shaft 6, and is transmitted to the output shaft 9 through the meshing of the second gear 8 on the idler shaft 6 and the output gear 10. The output shaft 9 transmits the power to the injection pump 14. The input shaft 2 and the output shaft 9 have the same rotation direction, and the reverse gear power transmission is realized through the secondary gear transmission.

[0035] When the amphibious vehicle is running on land, the wet clutch of the amphibious clutch transfer case 13 connected to the input shaft 9 on the gear box is separated, the input shaft 2 has a belt displacement torque, the brake clamp on the brake assembly 12 clamps the brake disc, and the shift fork on the shift mechanism assembly 11 pushes the sliding gear sleeve 5 to engage with the forward gear 4. Since the friction torque applied to the brake disc on the brake assembly 12 is greater than the belt displacement torque applied to the input shaft 2 by the amphibious clutch transfer case 13, all the shaft teeth in the gear box stop rotating, and the spray pump 14 connected to the output shaft 9 stops rotating, thereby reducing the wear of the water propulsion system.

[0036] All features described in the specification, the attached claims and the drawings, whether alone or in any combination thereof, are important features of the present utility model.

[0037] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model. Ordinary technicians in the field can change, modify, replace, modify, delete some features, add features or re-combine features to form a technical solution in the above embodiments without departing from the principles and purpose of the utility model within the scope of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the innovative principles of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A water propulsion gearbox for an amphibious vehicle, comprising a housing (1) and an input shaft (2) and an output shaft (9) arranged in the housing (1), characterized in that: The invention also comprises an idler shaft (6) and a shift mechanism assembly (11) arranged in the housing (1); a forward gear (4) and a reverse gear (3) are mounted on one side of the input shaft (2) located in the housing (1); a sliding gear sleeve (5) is arranged between the forward gear (4) and the reverse gear (3); the sliding gear sleeve (5) is arranged on the input shaft (2) in a manner of being fixed in the circumferential direction but not fixed in the axial direction; the shift mechanism assembly (11) is used to push the sliding gear sleeve (5) to engage with the forward gear (4) or the reverse gear (3); a first gear (7) and a second gear (8) are arranged on the idler shaft (6); the first gear (7) is meshedly connected with the reverse gear (3); an output gear (10) is arranged on the output shaft (9); the output gear (10) is meshedly connected with the second gear (8) and the forward gear (4) at the same time.

2. The amphibious vehicle water propulsion gearbox according to claim 1, characterized in that: It also includes a brake assembly (12), which includes a brake disc and a brake clamp. The brake disc is mounted on the input shaft (2), and the brake clamp is mounted on the housing (1).

3. The amphibious vehicle water propulsion gearbox according to claim 2, characterized in that: The brake assembly (12) is a dry brake.

4. The water propulsion gearbox for an amphibious vehicle according to claim 1 or 2, characterized in that: The input shaft (2) and the output shaft (9) are arranged vertically and eccentrically, and the idler shaft (6) is arranged on one side above the output shaft (9).

5. The water propulsion gearbox for an amphibious vehicle according to claim 1 or 2, characterized in that: One end of the input shaft (2) is supported on the housing (1) through a bearing, and the other end of the input shaft (2) extends out of the housing (1) and is connected to the amphibious clutch transfer case (13).

6. The water propulsion gearbox for an amphibious vehicle according to claim 1 or 2, characterized in that: One end of the output shaft (9) is supported on the housing (1) through a bearing, and the other end of the output shaft (9) extends out of the housing (1) and is connected to the spray pump (14).

7. The water propulsion gearbox for an amphibious vehicle according to claim 1 or 2, characterized in that: Both ends of the idler shaft (6) are supported on the housing (1) via bearings.

8. The water propulsion gearbox for an amphibious vehicle according to claim 1, characterized in that: The shift mechanism assembly (11) comprises a shift fork, and the shift fork is used to push the sliding gear sleeve (5) so that the sliding gear sleeve (5) engages with the forward gear (4) or the reverse gear (3).

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