Crankshaft of double-cylinder outboard engine

Abstract

The utility model relates to the technical field of crankshafts, in particular to a crankshaft of a double-cylinder outboard engine, which comprises a first crank throw and a second crank throw, the first crank throw comprises a first crank wall A and a first crank wall B, the first crank wall B is arranged on one side of the first crank wall A, and first inserting columns are arranged on one side of the first crank wall A and one side of the first crank wall B; the first crank wall A and the first crank wall B are connected together through a first connecting sleeve and a first inserting column to form a complete first crank throw, the second crank wall A and the second crank wall B form a complete second crank throw through a second connecting sleeve and a second inserting column, and the first crank throw and the second crank throw are installed together through a crank neck sleeve and a short butt joint column. The front end shaft is installed on one side of the first crank throw through the second butt-joint groove and the long butt-joint column, the rear end shaft is installed on one side of the second crank throw through the first butt-joint groove and the middle butt-joint column, installation and disassembly are convenient, and the rear end shaft can be independently disassembled to be replaced.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft technology, specifically to a crankshaft for a twin-cylinder outboard motor. Background Technology

[0002] Outboard motors, also known as ship engines, are propulsion engines mounted on the outside of the hull, usually suspended on the outside of the stern. Twin-cylinder outboard motors specifically refer to this type of engine with two cylinders. The crankshaft is the most important component of the engine. It bears the force transmitted from the connecting rod and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine.

[0003] The existing twin-cylinder outboard motor uses a crankshaft that is cast as a single piece, which cannot be disassembled to replace the damaged part. If a part is damaged, the entire crankshaft needs to be replaced, resulting in unnecessary waste. Therefore, a crankshaft for a twin-cylinder outboard motor is proposed, in which the first crank, the second crank, the rear shaft and the front shaft adopt an assembly design, and the first crank and the second crank are composed of multiple parts, all of which can be disassembled and replaced. Utility Model Content

[0004] To address the problems in the prior art, this utility model provides a crankshaft for a twin-cylinder outboard motor. The first crank, the second crank, the rear shaft, and the front shaft are designed as an assembly. The first and second cranks are composed of multiple parts, all of which can be disassembled and replaced.

[0005] The technical solution adopted by this utility model to solve its technical problem is a crankshaft of a twin-cylinder outboard motor, including a first crank and a second crank. The first crank includes a first crank wall A and a first crank wall B. The first crank wall B is disposed on one side of the first crank wall A. A first plug-in post is disposed on one side of the first crank wall A and the first crank wall B. A first connecting sleeve is disposed between the first crank wall A and the first crank wall B. The second crank is disposed on one side of the first crank. The second crank includes a second crank wall A and a second crank wall B. The second crank wall B is disposed on one side of the second crank wall A. A second plug-in post is disposed on one side of the second crank wall A and the second crank wall B. A second connecting sleeve is disposed between the second crank wall A and the second crank wall B.

[0006] A crank sleeve is provided between the first crank wall B and the second crank wall A. A short docking post corresponding to the crank sleeve is provided on one side of both the first crank wall B and the second crank wall A. A long docking post is provided on one side of the first crank wall A. A front end shaft is sleeved on the outside of the long docking post. A middle docking post is provided on one side of the second crank wall B. A rear end shaft is sleeved on the outside of the middle docking post.

[0007] By adopting the above technical solution, the first crank wall A and the first crank wall B are connected together by the first connecting sleeve and the first plug-in post, the second crank wall A and the second crank wall B are connected together by the second connecting sleeve and the second plug-in post, the first crank and the second crank are connected together by the crank sleeve and the short docking post, the front end shaft is connected to one side of the first crank by the long docking post, and the rear end shaft is connected to one side of the second crank by the middle docking post.

[0008] Specifically, the first connecting sleeve has a first limiting groove equidistantly provided on its inner side, the first connecting sleeve has a first fixing bolt equidistantly provided on both sides, the first plug post has a first limiting strip equidistantly provided on its outer side corresponding to the first limiting groove, and the first plug post has a first threaded groove provided on both sides.

[0009] Specifically, the second connecting sleeve has a second limiting groove equidistantly provided on its inner side, a second fixing bolt is provided equidistantly on both sides of the second connecting sleeve, a second limiting strip corresponding to the second limiting groove is provided equidistantly on the outer side of the second plug post, and a second threaded groove is provided on both sides of the second plug post.

[0010] Specifically, the curved neck sleeve has a third mating sleeve at both ends, a third slot is provided at equal intervals on the inner side of the third mating sleeve, a third bolt is provided on both sides of the curved neck sleeve, a second locking strip corresponding to the third slot is provided at equal intervals on the outer side of the short mating post, and a second threaded groove is provided on both sides of the short mating post.

[0011] Specifically, a second docking groove is provided at one end of the front shaft, and a second slot is provided at equal intervals on the inner side of the second docking groove. Second bolts are provided on both sides of the front shaft, and a first locking strip corresponding to the second slot is provided at equal intervals on the outer side of the long docking post. A first threaded groove is provided on both sides of the first locking strip.

[0012] Specifically, a first docking groove is provided at one end of the rear shaft, a first retaining groove is provided at equal intervals on the inner side of the first docking groove, a first bolt is provided on both sides of the rear shaft, a third retaining strip corresponding to the first retaining groove is provided at equal intervals on the outer side of the middle docking post, and a third threaded groove is provided on both sides of the middle docking post.

[0013] Specifically, oil holes are provided through one side of the front end shaft, the first connecting sleeve, the curved neck sleeve, and the second connecting sleeve, and keyways are provided on the top of the front end shaft and the rear end shaft.

[0014] The beneficial effects of this utility model are:

[0015] (1) The crankshaft of the twin-cylinder outboard motor described in this utility model is installed together with the first crank and the second crank through the crank sleeve and the short docking post. The front end shaft is installed on one side of the first crank through the second docking groove and the long docking post, and the rear end shaft is installed on one side of the second crank through the first docking groove and the middle docking post. It is easy to install and disassemble, and can be disassembled and replaced separately.

[0016] (2) The crankshaft of the twin-cylinder outboard motor described in this utility model is formed by connecting the first crank wall A and the first crank wall B together through the first connecting sleeve and the first plug-in post to form a complete first crank. The second crank wall A and the second crank wall B are connected by the second connecting sleeve and the second plug-in post to form a complete second crank, which can also be disassembled. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is an exploded view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the first and second cranks of this utility model;

[0021] Figure 4 This is a schematic diagram of the front shaft and long connecting column structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the curved neck sleeve and short butt joint column structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the middle connecting column and the rear shaft structure of this utility model;

[0024] In the diagram: 1. First crank; 101. First crank wall A; 102. First crank wall B; 103. First connecting sleeve; 104. First insertion post; 105. First limiting groove; 106. First limiting strip; 107. First fixing bolt; 108. First threaded groove; 2. Second crank; 201. Second crank wall A; 202. Second crank wall B; 203. Second connecting sleeve; 204. Second insertion post; 205. Second limiting groove; 206. Second limiting strip; 207. Second fixing bolt; 208. Second threaded groove; 3. Rear end shaft; 301, First bolt; 302, First mating groove; 303, First retaining groove; 4, Front end shaft; 401, Second bolt; 402, Second mating groove; 403, Second retaining groove; 5, Crank neck sleeve; 501, Third bolt; 502, Third mating sleeve; 503, Third retaining groove; 6, Long mating post; 601, First retaining strip; 602, First threaded groove; 7, Short mating post; 701, Second retaining strip; 702, Second threaded groove; 8, Keyway; 9, Oil hole; 10, Middle mating post; 1001, Third retaining strip; 1002, Third threaded groove. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] The first crank, second crank, rear axle, and front axle adopt an assembly design, and the first and second cranks are composed of multiple parts, all of which can be disassembled and replaced, such as... Figure 1-6 As shown, the crankshaft of a twin-cylinder outboard motor according to this utility model includes a first crank 1 and a second crank 2. The first crank 1 includes a first crank wall A101 and a first crank wall B102. The first crank wall B102 is disposed on one side of the first crank wall A101. A first insertion post 104 is disposed on one side of the first crank wall A101 and the first crank wall B102. A first connecting sleeve 103 is disposed between the first crank wall A101 and the first crank wall B102. The second crank 2 is disposed on one side of the first crank 1. The second crank 2 includes a second crank wall A201 and a second crank wall B202. The second crank wall B202 is disposed on one side of the second crank wall A201. A second insertion post 204 is disposed on one side of the second crank wall A201 and the second crank wall B202. A second connecting sleeve 203 is disposed between the second crank wall A201 and the second crank wall B202.

[0027] A crank sleeve 5 is provided between the first crank wall B102 and the second crank wall A201. A short docking post 7 corresponding to the crank sleeve 5 is provided on one side of both the first crank wall B102 and the second crank wall A201. A long docking post 6 is provided on one side of the first crank wall A101. A front end shaft 4 is sleeved on the outside of the long docking post 6. A middle docking post 10 is provided on one side of the second crank wall B202. A rear end shaft 3 is sleeved on the outside of the middle docking post 10.

[0028] In use, the first crank wall A101 and the first crank wall B102 are connected together through the first connecting sleeve 103 and the first plug post 104. The second crank wall A201 and the second crank wall B202 are connected together through the second connecting sleeve 203 and the second plug post 204. The first crank 1 and the second crank 2 are connected together through the crank neck sleeve 5 and the short docking post 7. The front shaft 4 is connected to one side of the first crank 1 through the long docking post 6, and the rear shaft 3 is connected to one side of the second crank 2 through the middle docking post 10.

[0029] For example, such as Figure 3 As shown, the present invention also includes: a first limiting groove 105 is provided at equal intervals on the inner side of the first connecting sleeve 103; a first fixing bolt 107 is provided at equal intervals on both sides of the first connecting sleeve 103; a first limiting strip 106 corresponding to the first limiting groove 105 is provided at equal intervals on the outer side of the first insertion post 104; and a first threaded groove 108 is provided on both sides of the first insertion post 104.

[0030] In use, the first fixing bolt 107 is screwed into the first threaded groove 108 to fix the first plug post 104 inserted into the first connecting sleeve 103. The first limiting strip 106 is engaged in the first limiting groove 105 so that the first crank wall A101 and the first crank wall B102 can rotate synchronously.

[0031] For example, such as Figure 3 As shown, the present invention also includes: a second limiting groove 205 is provided at equal intervals on the inner side of the second connecting sleeve 203; a second fixing bolt 207 is provided at equal intervals on both sides of the second connecting sleeve 203; a second limiting strip 206 corresponding to the second limiting groove 205 is provided at equal intervals on the outer side of the second insertion post 204; and a second threaded groove 208 is provided on both sides of the second insertion post 204.

[0032] In use, the second fixing bolt 207 is screwed into the second threaded groove 208 to fix the second plug post 204 inserted into the second connecting sleeve 203. The second limiting strip 206 is engaged in the second limiting groove 205, so that the second crank wall A201 and the second crank wall B202 can rotate synchronously.

[0033] For example, such as Figure 5As shown, this utility model also includes a third mating sleeve 502 at both ends of the curved neck sleeve 5, a third slot 503 equidistantly provided on the inner side of the third mating sleeve 502, a third bolt 501 provided on both sides of the curved neck sleeve 5, a second locking strip 701 equidistantly provided on the outer side of the short mating post 7 corresponding to the third slot 503, and a second threaded groove 702 provided on both sides of the short mating post 7.

[0034] When in use, the third bolt 501 is screwed into the second threaded groove 702 to fix the short docking post 7 in the third docking sleeve 502. The second locking strip 701 is engaged into the third locking groove 503 so that the first crank 1 and the second crank 2 can rotate synchronously.

[0035] For example, such as Figure 4 As shown, the present invention also includes a second docking groove 402 at one end of the front end shaft 4, a second slot 403 equidistantly provided on the inner side of the second docking groove 402, a second bolt 401 provided on both sides of the front end shaft 4, and a first locking strip 601 corresponding to the second slot 403 equidistantly provided on the outer side of the long docking post 6, and a first threaded groove 602 provided on both sides of the first locking strip 601.

[0036] When in use, the second bolt 401 is screwed into the first threaded groove 602 to fix the front end shaft 4 that is sleeved on the outside of the long connecting column 6. The first locking strip 601 is engaged into the second locking groove 403 so that the front end shaft 4 can rotate synchronously with the first crank 1.

[0037] For example, such as Figure 6 As shown, the present invention also includes a first docking groove 302 at one end of the rear shaft 3, a first locking groove 303 equidistantly provided on the inner side of the first docking groove 302, a first bolt 301 provided on both sides of the rear shaft 3, a third locking strip 1001 corresponding to the first locking groove 303 equidistantly provided on the outer side of the middle docking post 10, and a third threaded groove 1002 provided on both sides of the middle docking post 10.

[0038] When in use, the first bolt 301 is screwed into the third threaded groove 1002 to fix the rear shaft 3 that is sleeved on the outside of the middle connecting column 10. The third locking strip 1001 is engaged into the first locking groove 303 so that the rear shaft 3 can rotate synchronously with the second crank 2.

[0039] For example, such as Figure 2 As shown, the present invention also includes oil holes 9 through one side of the front end shaft 4, the first connecting sleeve 103, the curved neck sleeve 5, and the second connecting sleeve 203, and keyways 8 are provided on the top of the front end shaft 4 and the rear end shaft 3.

[0040] During use, the oil hole 9 serves to dissipate heat and facilitate the flow of lubricating oil.

[0041] In use, the first crank 1 is composed of a first crank wall A101 and a first crank wall B102. The first plug-in post 104 on one side of the first crank wall A101 and the first crank wall B102 is inserted into both ends of the first connecting sleeve 103. The first fixing bolt 107 is screwed into the first screw groove 108 to fix the first crank wall A101 and the first crank wall B102 on both sides of the first connecting sleeve 103. The first limiting strip 106 and the first limiting groove 105 enable the first crank wall A101, the first crank wall B102 and the first connecting sleeve 103 to rotate synchronously.

[0042] The second crank 2 is composed of a second crank wall A201 and a second crank wall B202. The second insertion post 204 on one side of the second crank wall A201 and the second crank wall B202 is inserted into both ends of the second connecting sleeve 203. The second fixing bolt 207 is screwed into the second threaded groove 208 to fix the second crank wall A201 and the second crank wall B202 on both sides of the second connecting sleeve 203. The setting of the second limiting strip 206 and the second limiting groove 205 allows the second crank wall A201, the second crank wall B202 and the second connecting sleeve 203 to rotate synchronously.

[0043] The first crank 1 and the second crank 2 are connected together by the crank sleeve 5 and the short docking post 7. The short docking post 7 of the first crank wall B102 and the second crank wall A201 is inserted into the third docking sleeve 502 at both ends of the crank sleeve 5. The third bolt 501 is screwed into the second threaded groove 702 to fix the short docking post 7 inserted into the crank sleeve 5. The second retaining strip 701 on the outside of the short docking post 7 is engaged into the third retaining groove 503 so that the first crank 1 and the second crank 2 can rotate synchronously.

[0044] The front shaft 4 is fixed to one side of the first crank 1 by the long docking post 6. The front shaft 4 is sleeved on the outside of the long docking post 6 through the second docking groove 402 at one end. The second bolt 401 is screwed into the first threaded groove 602 to fix the front shaft 4 sleeved on the outside of the long docking post 6. The first locking strip 601 is engaged in the second locking groove 403 so that the front shaft 4 can rotate synchronously with the first crank 1.

[0045] The rear shaft 3 is fixed to one side of the second crank 2 via the middle docking post 10. The first docking groove 302 at one end of the rear shaft 3 is fitted onto the outside of the middle docking post 10. The first bolt 301 is screwed into the third threaded groove 1002 to fix the rear shaft 3 fitted onto the outside of the middle docking post 10. The third locking strip 1001 is engaged in the first locking groove 303 so that the rear shaft 3 can rotate synchronously with the second crank 2.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A crankshaft for a twin-cylinder outboard motor, characterized in that, Includes a first crank (1) and a second crank (2). The first crank (1) includes a first crank wall A (101) and a first crank wall B (102). The first crank wall B (102) is disposed on one side of the first crank wall A (101). A first insertion post (104) is disposed on one side of both the first crank wall A (101) and the first crank wall B (102). A first connecting sleeve (103) is disposed between the first crank wall A (101) and the first crank wall B (102). The second crank (2) is located on one side of the first crank (1). The second crank (2) includes a second crank wall A (201) and a second crank wall B (202). The second crank wall B (202) is located on one side of the second crank wall A (201). A second plug-in post (204) is provided on both sides of the second crank wall A (201) and the second crank wall B (202). A second connecting sleeve (203) is provided between the second crank wall A (201) and the second crank wall B (202). A crank sleeve (5) is provided between the first crank wall B (102) and the second crank wall A (201). A short docking post (7) corresponding to the crank sleeve (5) is provided on one side of the first crank wall B (102) and the second crank wall A (201). A long docking post (6) is provided on one side of the first crank wall A (101). A front end shaft (4) is sleeved on the outside of the long docking post (6). A middle docking post (10) is provided on one side of the second crank wall B (202). A rear end shaft (3) is sleeved on the outside of the middle docking post (10).

2. The crankshaft of a twin-cylinder outboard motor according to claim 1, characterized in that, The first connecting sleeve (103) has a first limiting groove (105) equidistantly provided on the inner side, and a first fixing bolt (107) is provided equidistantly on both sides of the first connecting sleeve (103). The first plug-in post (104) has a first limiting strip (106) corresponding to the first limiting groove (105) equidistantly provided on the outer side, and a first screw groove (108) is provided on both sides of the first plug-in post (104).

3. The crankshaft of a twin-cylinder outboard motor according to claim 1, characterized in that, The second connecting sleeve (203) has a second limiting groove (205) equidistantly provided on the inner side, and a second fixing bolt (207) is provided equidistantly on both sides of the second connecting sleeve (203). The second plug post (204) has a second limiting strip (206) corresponding to the second limiting groove (205) equidistantly provided on the outer side, and a second threaded groove (208) is provided on both sides of the second plug post (204).

4. The crankshaft of a twin-cylinder outboard motor according to claim 1, characterized in that, The curved neck sleeve (5) has a third mating sleeve (502) at both ends. The third mating sleeve (502) has a third slot (503) at equal intervals on the inner side. The curved neck sleeve (5) has a third bolt (501) on both sides. The short mating post (7) has a second locking strip (701) at equal intervals on the outer side, corresponding to the third slot (503). The short mating post (7) has a second threaded groove (702) on both sides.

5. The crankshaft of a twin-cylinder outboard motor according to claim 1, characterized in that, The front end shaft (4) has a second docking groove (402) at one end, and a second slot (403) is provided at equal intervals on the inner side of the second docking groove (402). The front end shaft (4) has a second bolt (401) on both sides. The long docking column (6) has a first locking strip (601) corresponding to the second slot (403) at equal intervals on the outer side. The first locking strip (601) has a first threaded groove (602) on both sides.

6. The crankshaft of a twin-cylinder outboard motor according to claim 1, characterized in that, The rear shaft (3) has a first docking groove (302) at one end, and a first slot (303) is provided at equal intervals on the inner side of the first docking groove (302). The rear shaft (3) has a first bolt (301) on both sides. The middle docking post (10) has a third locking strip (1001) at equal intervals on the outer side corresponding to the first slot (303). The middle docking post (10) has a third threaded groove (1002) on both sides.

7. The crankshaft of a twin-cylinder outboard motor according to claim 1, characterized in that, Oil holes (9) are provided through one side of the front end shaft (4), the first connecting sleeve (103), the curved sleeve (5) and the second connecting sleeve (203), and keyways (8) are provided on the top of the front end shaft (4) and the rear end shaft (3).

Images