Outboard engine high-strength transmission structure convenient to assemble

Abstract

The utility model belongs to the technical field of transmission structures, and particularly discloses an outboard engine high-strength transmission structure convenient to assemble, which comprises a first power shaft and a second power shaft, the first power shaft and the second power shaft are coaxially arranged, the first power shaft comprises a first connecting part, and the second power shaft comprises a second connecting part. The second transmission shaft comprises a second connecting part connected to the first connecting part; the first connecting part comprises a first anti-rotation mechanism, and the second connecting part comprises a second anti-rotation mechanism inserted into the first anti-rotation mechanism; the first power shaft is matched with the second power shaft in an inserted mode. The power device is easy to assemble, the first power shaft and the second power shaft are matched in an inserted mode and limited and fixed through the locking piece, and assembling operation is facilitated; and compared with a production scheme of a long power shaft in a traditional scheme, the cost is obviously reduced, and the later maintenance and replacement cost is also obviously reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission structures, and particularly relates to a high-strength transmission structure for an outboard motor which is easy to assemble. Background Art

[0002] In recent years, as outdoor and water entertainment activities have become more and more popular, consumers have an increasing demand for yachts, and the yacht industry has shown a trend of expansion in scale in recent years. The outboard motor is one of the main power devices of the ship, usually installed on the side of the ship, responsible for providing propulsion. The structure of the outboard motor mainly includes an engine, a transmission device and a propeller. The engine is generally set at the height of the hull, and the power needs to be transmitted to the underwater propeller through the transmission device. The existing transmission device scheme generally includes a long power input shaft set vertically downward, which transmits power to the power output shaft through gear meshing, and the output shaft drives the propeller to rotate. The length of the power input shaft in this scheme is generally more than 700mm. The cost of producing a power shaft of this specification is relatively high, and the power shaft at this length has requirements for the strength of the material. It is necessary to maintain a large torque power output at a longer length. Therefore, the transmission shaft needs to select a material with higher strength; at the same time, there are also high requirements for the production process. The concentricity of the power shaft needs to be maintained to prevent deformation during the assembly process, so that the outboard motor will have movement, shaking, interference and other phenomena during the operation of the outboard motor, thereby affecting the service life of the outboard motor.

[0003] Based on the above reasons, the utility model proposes a high-strength transmission structure of an outboard motor that is easy to assemble. Utility Model Content

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to propose a high-strength transmission structure for an outboard motor that is easy to assemble. The transmission structure adopts a segmented structural design, which greatly reduces the production difficulty and cost of small sections of the power shaft, and the coaxial assembly structure design makes the overall structure easy to assemble.

[0005] To achieve the above object, the utility model adopts the following technical solution: an outboard motor high-strength transmission structure that is easy to assemble includes a first power shaft and a second power shaft, the first power shaft and the second power shaft are coaxially arranged, the first power shaft includes a first connecting portion, and the second transmission shaft includes a second connecting portion connected to the first connecting portion;

[0006] The first connecting portion includes a first anti-rotation mechanism, the first anti-rotation mechanism includes at least one first anti-rotation surface, the second connecting portion includes a second anti-rotation mechanism plugged into the first anti-rotation mechanism, the second anti-rotation mechanism includes a second anti-rotation surface matched with the first anti-rotation surface;

[0007] The first connecting portion further includes a limiting hole, and the second connecting portion includes a locking hole coaxial with the limiting hole and a locking member, the locking member passes through the locking hole and is plugged into the limiting hole, and the locking member is inclined relative to the axial direction of the second power shaft.

[0008] As a preferred solution: the outer circumference of the first connecting part is smaller than or equal to the inner circumference of the second connecting part, and the second connecting part is sleeved on the first connecting part.

[0009] As a preferred solution: the first anti-rotation mechanism includes four first anti-rotation surfaces arranged at intervals, and the limiting hole is arranged through the first anti-rotation surfaces.

[0010] As a preferred solution: the first anti-rotation mechanism is an external spline, and the second anti-rotation mechanism is an internal spline, and the external spline and the internal spline cooperate with each other.

[0011] As a preferred solution: the first connecting portion further includes a first abutting surface, the first abutting surface is protruding from the first anti-rotation surface, and the second connecting portion further includes a second abutting surface, the second abutting surface abuts against the first abutting surface.

[0012] As a preferred solution: the first connecting portion also includes a first assembly section arranged at the extended end of the first anti-rotation mechanism, the outer peripheral wall of the first anti-rotation mechanism protrudes from the outer peripheral wall of the first assembly section, the second connecting portion includes a second assembly section plugged into the first assembly section, the second assembly section includes a third abutment surface, the first assembly section abuts against the third abutment surface, and the second assembly section is coaxially matched with the first assembly section.

[0013] As a preferred solution: the locking hole includes an anti-slip groove that is arc-shaped and recessed from the inner surface, and the locking piece includes an elastic protrusion that abuts and cooperates with the anti-slip groove.

[0014] As a preferred solution: the locking member is an elastic pin.

[0015] As a preferred solution: the second power shaft includes a weight-reducing hole arranged along the axial direction of the second power shaft, the weight-reducing hole is a through hole, and the weight-reducing hole is flush with the second assembly section.

[0016] As a preferred solution: the second power shaft further includes a third connection portion arranged at an end away from the first power shaft, and the third connection portion is symmetrical to the second connection portion.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) Easy to assemble. The first power shaft and the second power shaft are plugged into each other and fixed by a locking piece, which is convenient for assembly operation;

[0019] (2) Cost savings: Compared with the traditional production plan of long power shafts, the cost is significantly reduced, and the cost of subsequent repair, maintenance and replacement is also significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an exploded schematic diagram of the high-strength transmission structure of the outboard motor proposed by the utility model;

[0021] Figure 2 This is a structural schematic diagram of the first power shaft of the high-strength transmission structure of the outboard motor proposed by the utility model;

[0022] Figure 3 A cross-sectional schematic diagram of the first power shaft of the high-strength transmission structure of the outboard motor proposed by the utility model;

[0023] Figure 4 This is a schematic structural diagram of the second power shaft of the outboard motor high-strength transmission structure proposed by the utility model.

[0024] Figure 5 The utility model is a cross-sectional schematic diagram of the second power shaft of the high-strength transmission structure of the outboard motor.

[0025] In the figure: 1-first power shaft; 11-first connecting part; 111-first anti-rotation mechanism; 1111-first anti-rotation surface; 112-limiting hole; 113-first abutting surface; 114-first assembly section; 2-second power shaft; 21-second connecting part; 211-second anti-rotation mechanism; 2111-second anti-rotation surface; 212-locking hole; 213-locking piece; 214-second assembly section; 22-third connecting part; 23-weight reduction hole. DETAILED DESCRIPTION

[0026] In order to better illustrate the purpose and advantages of the present invention, the invention is further described below with reference to the accompanying drawings and examples, but the present invention is not limited to the examples.

[0027] Example: Figures 1 to 5 As shown, a high-strength transmission structure of an outboard motor that is easy to assemble includes a first power shaft 1 and a second power shaft 2. The first power shaft 1 and the second power shaft 2 are coaxially arranged. The first power shaft 1 includes a first connecting portion 11, and the second transmission shaft includes a second connecting portion 21 connected to the first connecting portion 11;

[0028] The first connection portion 11 includes a first anti-rotation mechanism 111, the first anti-rotation mechanism 111 includes at least one first anti-rotation surface 1111, the second connection portion 21 includes a second anti-rotation mechanism 211 plugged into the first anti-rotation mechanism 111, the second anti-rotation mechanism 211 includes a second anti-rotation surface 2111 matched with the first anti-rotation surface 1111;

[0029] The first connection part 11 also includes a limiting hole 112 , and the second connection part 21 includes a locking hole 212 and a locking member 213 coaxial with the limiting hole 112 . The locking member 213 passes through the locking hole 212 and is plugged into the limiting hole 112 . The locking member 213 is inclined relative to the axial direction of the second power shaft 2 .

[0030] The outer diameter of the first connection portion 11 is smaller than or equal to the inner diameter of the second connection portion 21 , and the second connection portion 21 is sleeved on the first connection portion 11 .

[0031] The first anti-rotation mechanism 111 includes four first anti-rotation surfaces 1111 arranged at intervals, and the limiting holes 112 are arranged through the first anti-rotation surfaces 1111 .

[0032] The first anti-rotation mechanism 111 is an external spline, and the second anti-rotation mechanism 211 is an internal spline, and the external spline and the internal spline cooperate with each other.

[0033] The first connecting portion 11 further includes a first abutting surface 113 , which is protruding from the first anti-rotation surface 1111 . The second connecting portion 21 further includes a second abutting surface (not shown), which abuts against the first abutting surface 113 .

[0034] The first connecting portion 11 also includes a first assembly segment 114 arranged at the extended end of the first anti-rotation mechanism 111, the outer peripheral wall of the first anti-rotation mechanism 111 protrudes from the outer peripheral wall of the first assembly segment 114, the second connecting portion 21 includes a second assembly segment 214 plugged into the first assembly segment 114, the second assembly segment 214 includes a third abutting surface (not shown), the first assembly segment 114 abuts against the third abutting surface, and the second assembly segment 214 is coaxially matched with the first assembly segment 114.

[0035] The locking hole 212 includes an anti-slip groove (not shown) that is arc-shaped and recessed from the inner surface, and the locking member 213 includes an elastic protrusion (not shown) that abuts against the anti-slip groove.

[0036] The locking member 213 is an elastic pin.

[0037] The second power shaft 2 includes a weight-reducing hole 23 arranged along the axial direction of the second power shaft 2 . The weight-reducing hole 23 is a through hole, and the weight-reducing hole 23 is flush with the second assembly section 214 .

[0038] The second power shaft 2 further includes a third connection portion 22 disposed at an end away from the first power shaft 1 , and the third connection portion 22 and the second connection portion 21 are symmetrical to each other.

[0039] The above is a preferred embodiment of the utility model, and it should be understood that the protection scope of the utility model is not limited to such specific statements and embodiments. The changes and modifications made by ordinary technicians in this field based on the core idea of ​​the utility model should be within the protection scope of the claims attached to the utility model.

Claims

1. A high-strength transmission structure for an outboard motor that is easy to assemble, characterized in that: It comprises a first power shaft and a second power shaft, wherein the first power shaft and the second power shaft are coaxially arranged, the first power shaft comprises a first connecting portion, and the second power shaft comprises a second connecting portion connected to the first connecting portion; The first connecting portion includes a first anti-rotation mechanism, the first anti-rotation mechanism includes at least one first anti-rotation surface, the second connecting portion includes a second anti-rotation mechanism plugged into the first anti-rotation mechanism, the second anti-rotation mechanism includes a second anti-rotation surface matched with the first anti-rotation surface; The first connecting portion further includes a limiting hole, and the second connecting portion includes a locking hole coaxial with the limiting hole and a locking member, the locking member passes through the locking hole and is plugged into the limiting hole, and the locking member is inclined relative to the axial direction of the second power shaft.

2. The high-strength transmission structure for an outboard motor that is easy to assemble according to claim 1, characterized in that: The outer circumference of the first connection part is smaller than or equal to the inner circumference of the second connection part, and the second connection part is sleeved on the first connection part.

3. The high-strength transmission structure for outboard motors that is easy to assemble according to claim 2, characterized in that: The first anti-rotation mechanism includes four first anti-rotation surfaces that are spaced apart from each other, and the limiting holes are disposed through the first anti-rotation surfaces.

4. The high-strength transmission structure for an outboard motor that is easy to assemble according to claim 3 is characterized in that: The first anti-rotation mechanism is an external spline, and the second anti-rotation mechanism is an internal spline, and the external spline and the internal spline cooperate with each other.

5. The high-strength transmission structure for an outboard motor that is easy to assemble according to claim 1, characterized in that: The first connecting portion further includes a first abutting surface, which is protruding from the first anti-rotation surface, and the second connecting portion further includes a second abutting surface, which abuts against the first abutting surface.

6. The easy-to-assemble high-strength transmission structure for outboard motor according to claim 1, characterized in that: The first connecting portion also includes a first assembly section arranged at the extended end of the first anti-rotation mechanism, the outer peripheral wall of the first anti-rotation mechanism protrudes from the outer peripheral wall of the first assembly section, the second connecting portion includes a second assembly section plugged into the first assembly section, the second assembly section includes a third abutment surface, the first assembly section abuts against the third abutment surface, and the second assembly section is coaxially matched with the first assembly section.

7. The easy-to-assemble high-strength transmission structure for outboard motor according to claim 1, characterized in that: The locking hole comprises an anti-slip groove which is arc-shapedly recessed from the inner surface, and the locking piece comprises an elastic protrusion which abuts and cooperates with the anti-slip groove.

8. The easy-to-assemble high-strength transmission structure for outboard motor according to claim 1, characterized in that: The locking piece is an elastic pin.

9. The easy-to-assemble high-strength transmission structure for outboard motor according to claim 6, characterized in that: The second power shaft comprises a weight-reducing hole arranged along the axial direction of the second power shaft, the weight-reducing hole is a through hole, and the weight-reducing hole is flush with the second assembly section.

10. The easy-to-assemble high-strength transmission structure for outboard motor according to claim 1, characterized in that: The second power shaft further includes a third connection portion disposed at an end away from the first power shaft, and the third connection portion is symmetrical to the second connection portion.

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