Light high-speed marine gearbox

Abstract

The utility model discloses a gearbox for a light high-speed ship. The gearbox comprises a box body part, a front-end integrated input shaft front cover, a transmission shaft front cover and a rear-end integrated output shaft rear end cover, the input component comprises an input shaft, an input shell gear and an input driving gear, the input shell gear is welded on the input shaft, the input driving gear is supported on the input shaft through a first sliding bearing, and an input clutch is arranged between the input shell gear and the input driving gear; the transmission part comprises a transmission shaft, a transmission shell gear and a transmission driving gear, the transmission shell gear is welded on the transmission shaft, the transmission driving gear is supported on the transmission shaft through a second sliding bearing, a transmission clutch is arranged between the transmission shell gear and the transmission driving gear, and the input shell gear is meshed with the transmission shell gear; the output component comprises an output shaft and an output gear, and the input driving gear and the transmission driving gear are meshed with the output gear at the same time. According to the scheme, the light weight of the gearbox can be further achieved.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a lightweight high-speed marine gearbox. Background Technology

[0002] Existing marine gearboxes typically employ an upper and lower housing structure, or a front and rear housing structure. However, they all include components such as the input front cover, input rear cover, transmission front cover, transmission rear cover, output front cover, and output rear cover. While this structure is simple to manufacture, the mating surfaces of each end cover with the housing increase the gearbox's volume and weight. Furthermore, the input and transmission drive gears are often supported on the housing by bearings, which increases the number of bearings and the bearing mounting structures on the housing. The input housing gears are mostly interference-fitted onto the input shaft, and the transmission housing gears are mostly interference-fitted onto the transmission shaft. The interference fit required for these mountings is too large, all of which contribute to the increased volume and weight of the gearbox, making it impossible to achieve lightweight marine gearboxes. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a lightweight high-speed marine gearbox with a compact structure and lightweight design.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A lightweight high-speed marine gearbox includes a housing component and an input component, a transmission component, and an output component disposed within the housing component, wherein:

[0006] The housing component integrates the input shaft front cover and the drive shaft front cover at the front end, and the output shaft rear cover at the rear end.

[0007] The input component includes an input shaft, an input housing gear, and an input drive gear. The input housing gear is welded to the input shaft, and the input drive gear is supported on the input shaft by a first sliding bearing. An input clutch is provided between the input housing gear and the input drive gear.

[0008] The transmission components include a transmission shaft, a transmission housing gear, and a transmission drive gear. The transmission housing gear is welded to the transmission shaft, and the transmission drive gear is supported on the transmission shaft by a second sliding bearing. A transmission clutch is provided between the transmission housing gear and the transmission drive gear, and the input housing gear and the transmission housing gear mesh with each other.

[0009] The output component includes an output shaft, on which an output gear is interference-fitted. The input drive gear and the transmission drive gear mesh with the output gear simultaneously.

[0010] In this way, by integrating the end caps onto the housing, and by supporting the input drive gear and the transmission drive gear on the input shaft and the transmission shaft respectively through the first sliding bearing and the second sliding bearing, and by welding and fixing the input housing gear and the transmission housing gear to the input shaft and the transmission shaft respectively, the size and weight of the gearbox are effectively reduced, further achieving the lightweighting of the gearbox.

[0011] Preferably, the system also includes hydraulic control components and piping components, wherein the control valve in the hydraulic control components is used to control the engagement and disengagement of the input clutch and the transmission clutch.

[0012] Preferably, the input clutch has a first piston and a first return spring for resetting the first piston on one side, and the transmission clutch has a second piston and a second return spring for resetting the second piston on one side.

[0013] Preferably, the front end of the input shaft is connected to a highly flexible coupling.

[0014] Preferably, a cover is also fixedly provided on the housing component, and the cover is set on the outer periphery of the high elasticity coupling.

[0015] Preferably, the box components are also equipped with supports on both sides.

[0016] Preferably, the two ends of the input shaft are supported in the housing component by the third and fourth bearings respectively, the two ends of the drive shaft are supported in the housing component by the fifth and sixth bearings respectively, and the two ends of the output shaft are supported in the housing component by the seventh and eighth bearings respectively.

[0017] Preferably, the third, fourth, fifth, sixth, seventh, and eighth bearings are rolling bearings.

[0018] Preferably, the housing component consists of a front housing and a rear housing, with the input shaft front cover and the drive shaft front cover integrated on the front housing, and the output shaft rear cover integrated on the rear housing.

[0019] This utility model, by adopting the above technical solution, has the following beneficial effects:

[0020] In this invention, by integrating the end caps onto the housing, and by supporting the input drive gear and the transmission drive gear on the input shaft and the transmission shaft respectively via the first sliding bearing and the second sliding bearing, and by welding and fixing the input housing gear and the transmission housing gear to the input shaft and the transmission shaft respectively, the fit length between the input housing gear and the input shaft and the fit length between the transmission housing gear and the transmission shaft are reduced, thereby effectively reducing the volume and weight of the gearbox and further achieving the lightweighting of the gearbox. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0023] Figure 3 yes Figure 1 A partial cross-sectional structural diagram of BB.

[0024] Figure label:

[0025] 101. Cover; 102. Bracket; 103. Front housing; 104. Rear housing; 105. Control valve;

[0026] 201. Input shaft; 202. Third bearing; 203. Fourth bearing; 204. Input housing gear; 205. Input drive gear; 206. First sliding bearing; 207. Input clutch; 208. First piston;

[0027] 301. Drive shaft; 302. Fifth bearing; 303. Sixth bearing; 304. Drive housing gear; 305. Drive drive gear; 306. Second sliding bearing; 307. Drive clutch; 308. Second piston;

[0028] 401. Output gear; 402. Output shaft;

[0029] 50. Piping components;

[0030] 60. Highly flexible coupling. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] To illustrate this invention more clearly, the side of the power input gearbox is referred to as the front, and the other side as the rear.

[0037] like Figures 1 to 3 As shown, this utility model discloses a lightweight high-speed marine gearbox, including a gearbox body component, an input component, a transmission component and an output component disposed within the gearbox body component, and a hydraulic control component and a pipeline component 50 disposed outside the gearbox body component.

[0038] The housing component is formed by threaded connection of the front housing 103 and the rear housing 104. The front cover of the input shaft and the front cover of the transmission shaft are integrated on the front housing 103, and the rear cover of the output shaft is integrated on the rear housing 104.

[0039] Input components, such as Figure 2 As shown, it includes an input shaft 201, an input housing gear 204, and an input drive gear 205. The two ends of the input shaft 201 are supported in the housing component by a third bearing 202 and a fourth bearing 203, respectively. The third bearing 202 and the fourth bearing 203 are rolling bearings.

[0040] A high-elasticity coupling 60 is connected to the front end of the input shaft 201. The input housing gear 204 is welded to the input shaft 201. The input drive gear 205 is supported on the input shaft 201 by a first sliding bearing 206. An input clutch 207 is provided between the input housing gear 204 and the input drive gear 205. The outer friction plate of the input clutch 207 is fixed to the input housing gear 204, and the inner friction plate of the input clutch 207 is fixed to the input drive gear 205. A first piston 208 and a first return spring for resetting the first piston 208 are provided on one side of the input clutch 207.

[0041] Transmission components, such as Figure 3 As shown, it includes a drive shaft 301, a drive housing gear 304, and a drive gear 305. The two ends of the drive shaft 301 are supported in the housing component by a fifth bearing 302 and a sixth bearing 303, respectively. The fifth bearing 302 and the sixth bearing 303 are rolling bearings.

[0042] The transmission housing gear 304 is welded to the transmission shaft 301, and the transmission drive gear 305 is supported on the transmission shaft 301 via a second sliding bearing 306. A transmission clutch 307 is provided between the transmission housing gear 304 and the transmission drive gear 305. The outer friction plate of the transmission clutch 307 is fixed to the transmission housing gear 304, and the inner friction plate of the transmission clutch 307 is fixed to the transmission drive gear 305. A second piston 308 and a second return spring for resetting the second piston 308 are provided on one side of the transmission clutch 307. The input housing gear 204 and the transmission housing gear 304 mesh with each other.

[0043] Output components, such as Figure 2 As shown, the assembly includes an output shaft 402, with both ends of the output shaft 402 supported within the housing component by a seventh bearing and an eighth bearing, respectively. The seventh and eighth bearings are rolling bearings. An output gear 401 is interference-fitted onto the output shaft 402. The input drive gear 205 and the transmission drive gear 305 do not mesh with each other; instead, both the input drive gear 205 and the transmission drive gear 305 simultaneously mesh with the output gear 401.

[0044] This utility model provides a marine gearbox by integrating the end caps onto the housing, and by supporting the input drive gear 205 and the transmission drive gear 305 on the input shaft 201 and the transmission shaft 301 respectively via the first sliding bearing 206 and the second sliding bearing 306. By welding and fixing the input housing gear 204 and the transmission housing gear 304 to the input shaft 201 and the transmission shaft 301 respectively, the fit length between the input housing gear 204 and the input shaft 201 and the fit length between the transmission housing gear 304 and the transmission shaft 301 are reduced, thereby effectively reducing the size and weight of the gearbox, resulting in a compact overall structure and further achieving gearbox lightweighting.

[0045] The gearbox also includes a hydraulic control unit and a pipeline component 50. The control valve 105 in the hydraulic control unit is connected to the first piston 208 and the second piston 308 to control the engagement and disengagement of the input clutch 207 and the transmission clutch 307. The oil pump in the hydraulic control unit is used to supply oil through the pipeline component 50.

[0046] The marine gearbox also includes a housing 101 and a bracket 102. The housing 101 has ventilation and heat dissipation functions and is fixedly installed on the gearbox component and surrounds the outer periphery of the high-elasticity coupling 60. The bracket 102 is bolted to both sides of the gearbox component. When the marine gearbox is flexibly installed together with the diesel engine, the high-elasticity coupling 60 is connected to the diesel engine flywheel, the housing 101 is connected to the diesel engine cover, and the bracket 102 is installed on an elastic damping pad. The flexibly installed together with the diesel engine results in low vibration and noise.

[0047] The gearbox is used as follows:

[0048] When the control valve 105 is in "forward" mode, hydraulic oil flows through the pipeline component 50 to the cylinder of the input clutch 207, pushing the first piston 208 to press against the inner and outer friction plates of the input clutch 207, that is, the input clutch 207 is engaged. At this time, power is transmitted from the input shaft 201 through the input housing gear 204, the input clutch 207, the input drive gear 205, and the output gear 402 to the output shaft 401, and finally output to the propeller.

[0049] When the control valve 105 is in "neutral" position, the hydraulic oil in the input clutch 207 and the transmission clutch 307 returns to the oil sump at the bottom of the housing via the pipeline component 50.

[0050] When control valve 105 is in "reverse gear", hydraulic oil flows through pipeline component 50 to the cylinder of transmission clutch 307, pushing the second piston 308 to press against the inner and outer friction plates of transmission clutch 307, i.e., transmission clutch 307 is engaged. At this time, power is transmitted from input shaft 201 through input housing gear 204, transmission housing gear 204, transmission clutch 307, transmission drive gear 305, and output gear 402 to output shaft 401, and finally output to propeller.

[0051] All features described in the specification, appended claims and drawings, whether individually or in any combination thereof, are essential features of this utility model.

[0052] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described above can be combined in any suitable manner in one or more embodiments, implementation methods, or examples. The technical solutions described in this utility model also include technical solutions formed by any one or more specific features, structures, materials, or characteristics described above, either individually or in combination.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, alterations, deletions of some features, additions of features, or recombinations of features to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the innovative principles of the present invention shall still fall within the scope of the technical solutions of the present invention.

Claims

1. A gear box for a high speed light weight craft, comprising a box member and an input member, a transmission member and an output member arranged in the box member, characterized in that, the box member, a front end of the box member integrates an input shaft front cover and a transmission shaft front cover, a rear end of the box member integrates an output shaft rear end cover; the input member, comprising an input shaft (201), an input housing gear (204) and an input driving gear (205), the input housing gear (204) is welded on the input shaft (201), the input driving gear (205) is supported on the input shaft (201) through a first sliding bearing (206), an input clutch (207) is arranged between the input housing gear (204) and the input driving gear (205); the transmission member, comprising a transmission shaft (301), a transmission housing gear (304) and a transmission driving gear (305), the transmission housing gear (304) is welded on the transmission shaft (301), the transmission driving gear (305) is supported on the transmission shaft (301) through a second sliding bearing (306), a transmission clutch (307) is arranged between the transmission housing gear (304) and the transmission driving gear (305), the input housing gear (204) and the transmission housing gear (304) are engaged; the output member, comprising an output shaft (402), the output shaft (402) is interference fitted with an output gear (401), the input driving gear (205) and the transmission driving gear (305) are engaged with the output gear (401) at the same time.

2. A gear box for a high speed light craft according to claim 1, characterized in that further comprising a hydraulic control member and a pipeline member (50), a control valve (105) in the hydraulic control member is used to control the engagement and disengagement of the input clutch (207) and the transmission clutch (307).

3. A gear box for a high speed light craft as claimed in claim 1 wherein, a first piston (208) and a first return spring for resetting the first piston (208) are arranged on one side of the input clutch (207), a second piston (308) and a second return spring for resetting the second piston (308) are arranged on one side of the transmission clutch (307).

4. A gear case for a high speed light craft as claimed in claim 1, wherein a high elasticity coupling (60) is connected to a front end of the input shaft (201).

5. A gear box for a planing vessel as claimed in claim 4, characterized in that a cover shell (101) is further fixed on the box member, the cover shell (101) is arranged on an outer periphery of the high elasticity coupling (60).

6. A gear case for a high speed light craft as claimed in claim 1, wherein brackets (102) are further arranged on both sides of the box member.

7. A gear case for a high speed light craft as claimed in claim 1, wherein both ends of the input shaft (201) are supported in the box member through a third bearing (202) and a fourth bearing (203), both ends of the transmission shaft (301) are supported in the box member through a fifth bearing (302) and a sixth bearing (303), both ends of the output shaft (402) are supported in the box member through a seventh bearing and an eighth bearing.

8. A gear case for a planing vessel as claimed in claim 7, characterized in that the third bearing (202), the fourth bearing (203), the fifth bearing (302), the sixth bearing (303), the seventh bearing and the eighth bearing are rolling bearings.

9. A gear case for a high speed light craft as claimed in claim 1, wherein the box member is composed of a front box (103) and a rear box (104), the input shaft front cover and the transmission shaft front cover are integrated on the front box (103), the output shaft rear end cover is integrated on the rear box (104).

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